School me in the ways of intaking fuel and air... Okay, So work on Justy continues... slowly. I now have a rented garage locally where once it's a roller, I'll bring little Justy back to and get to work fast! (Whew Hoo!) (apres July 1st) In the mean time, I have a few little bits I'm sorting out on the kitchen table. In stock form the 1st Gen 1.2L 3cyl machine breaths through an anemic Hitachi carb... The 2nd Gen has fuel injection (did you know that the Justy was the last carb'd production car sold in North America?!) Both suck... So we're hoping to switch to a triple carb set-up since the carbs are sourced for free... we don't have to worry about stand alone, and well, having grown up with bikes, carbs are cool... Currently in my possession I have a set of beautiful Mikuni 33mm flat slides. I won't say what they are from (in part because I'm not sure of the "model", and in part because most of you would laugh when I said the machine ran on snow (oops let that slip)) The ID on the carbs is pretty close to the cross sectional area of the intake (within the mm) so I think they are a good fit... Yes, No? Problem being they are set up on 12 cm centers, the intake is 8.5cm centers. First, I'm trying to sort out is having slightly different intake runner lengths will be an issue? Angling the intake runners out to the 12 cm centers... We're talking less the a cm diff. (12cm vs 12.5cm or so) Second, what is a decent runner length to make good torxs, and decent throttle response. The intraweeb is full of opinions on intake runner length, and my limited wave physics mind is having a hard time making sense of the gobbly goop BS spouted. How much does cam specs play into this? Here's the pretty pics. As for the beer, more Quebec micros... mmm mmm good. https://www.rallyanarchy.com/phorum/read.php?5,51279,51279#msg-51279 Tue, 07 Jul 2026 03:18:55 -0500 Phorum 5.2.15a https://www.rallyanarchy.com/phorum/read.php?5,51279,118270#msg-118270 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118270#msg-118270
Quote
Mad Matt F
Thanks Robert, but I can probably chuck a hunk in the lathe and make that up for less then shipping... ;) However in some ways the pic answered my question... I guess the short version of my rambling above was... "what's typical wall thickness on an inverted billy outer tube?". and from there it looks like at least 3mm (looks thicker than the 45/40mm - 2.5mm wall tubes I have, that I could not fit a bush in... but similar to the .120 wall DOM... so... roll cage tubes? Why not. ;)

Probably easiest to just schedule an hour or two, pick up the damn phone and see if I can catch JVL between kitty feedings and cig breaks. ;)

Yeah probably..same number as always..call after 10.30 AM Pacific Time.]]> john vanlandingham Construction Zone Thu, 19 Aug 2021 21:16:47 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,118263#msg-118263 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118263#msg-118263
Probably easiest to just schedule an hour or two, pick up the damn phone and see if I can catch JVL between kitty feedings and cig breaks. ;)]]> Mad Matt F Construction Zone Sun, 18 Jul 2021 09:59:15 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,118262#msg-118262 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118262#msg-118262 There's a 14.5" version, and inserts available as well on the site.

https://www.motorsport-tools.com/coilover-strut-tube-adjustable-ride-height-13-5-with-du-bush-seal-40mm-id.html?SID=mb4t9ih034n7iol4q8t3u5f5f6]]> culberro Construction Zone Tue, 13 Jul 2021 12:21:00 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,118260#msg-118260 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118260#msg-118260
What do do with all this extra travel!!! ;)

I think I make it used up in both bump and droop right? Extend the overall length of the pin to pin by 1/2 the extra travel... I get a bit more droop, I get a bit more bump? Never broken a cv... but don't want to start now.]]> Mad Matt F Construction Zone Tue, 06 Jul 2021 00:51:02 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,118259#msg-118259 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118259#msg-118259
check 1-2, check, check, is this thing is on?... please see here (for more background)

https://www.rallyanarchy.com/phorum/read.php?5,43590,page=3

I have some um, dubious inverted billies... some sorta "jdm-b-spec rally crap" from a immmpwneza or maybe a legacy... I can't remember... but they are 40 mm tubes, and have a whole wacking 7" of travel!, compared to my 5.5"! (wait... that sounds bad) soooo... damn the torpedoes. gawd another bad euphemism...

If I'm gonna build semi-somewhat-super-beeching-suspenderners, I need to think tubes and bearing bushes, and clearances and schtuff.

The stock justy stuff is inside a 45mm tube... this fits in the knuckle as a pinch, not welded eyes. For the time being I would like to keep this config, so I have back-ups in the stock (my modified sheet) stuff...

Fwiw, I have never broken suspension... pounded it yes, but never bent anything without sliding into a rock first that knocked out the whole subframe... so...

first pic is the stock Justy left with the 40 mm billy right... same OA length! and even same thread! wow! might be able to use stock tops... but that may change, not part of this current discussion.

Question 1: Tube sizing... so.. these fit in a 40X45mm tube... of which I have some (stock tubing) but there is no space for a bush, so if I turn it out to fit even a thin bush, wall sie is getting thin... then if I thread the outside for a spring seat... even thinner... I could add a sleeve or the threading. but is 1.5 mm to thin for a tube??? it seems thin to me...

I have some 2"DOM that is like 45mm id... well 2" DOM 120 wall, that I could bore... Oh yeah, I have a real lathe. Then I could sleeve and weld in the 45 mm tube to fit the knuckle, gives me lots of meat, and lots of room for big fat bushes. But seems overkill? I see "rally spec" bushes for the 40 mm billies are 42 mm od, so maybe my 45 mm tube is okay???

1.75 DOM is pretty close to 45mmm and I have some of that on hand (right of billy first pic)... I could make the tubes from that...

but I could just use the stock tubes (second pic) here in a rear tube I had cut open...



Thoughts?]]> Mad Matt F Construction Zone Tue, 06 Jul 2021 00:44:10 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,118239#msg-118239 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,118239#msg-118239
Hope everyone is doing as well as can be expected in this fACKed up time... FACK

Anyway, The Justy "kinda" works... and as long as the crazy homemade oiling system holds to together, rods seem to mostly stay inside the block! What a concept. My home shop tooling is always getting better, and I'm looking to eliminate the cobbled together Melling 55 castings, and use the internals in a BESPOKE ( ha I used bespoke) dry sump pump housing I hog out of some cheap aluminium beer can ingot from the forge (no... I will buy a block, er maybe), adn then make my pressure relief valve internal of that. I might even double up the scavenge pumps to 2 high volume out, one standard in.

Anyway, there's still a bit of "tuning to do" but to be honest, I'm kinda happy with the estimated 100 hp... I mean it goes like relative hell, and makes a ton of cool noises. I will never stand on the podium at Pines, so who the F cares...

I have some shit homebrew suspension, and I'm planning a bit of an upgrade... But I can help but think of the super Justy noted below ;) and I keep telling my junkyard dog self, that it would do no good to push the wheels out, add some fender flares... but damn that looks like a little Intergrale! ;)

So here's the chance for 6 beers in shop talk, keyboard warrior bullshit time! Tune up your best bullshit and tell me why a car with a 90 inch stock wheel base and 60 inch outer rim width wouldn't benefit on gravel from a bit more width like 3? inches 4? enough to make the flares actually worth while? I could carve up the wells and run 14s!!! which yes could fawk my gearing... but I think I can find rally tires not much taller then my 165 65 13 in a 14... and that opens up a world of cheap VW rims and used tires. Cause I know Chris Kepksi has a huge inventory he needs to unload :)


I can go as simple as making some wheel spacers... or I can go full hog and build full bespoke suspension with inverted shit (it's been sitting around here long enough collecting dust) and lengthened control arms... and the try to tune that beast... or

I can go back to my hole in the wall, drink beer and dream of winning Dirt (wait, is that the cornputer game da kids are playin' these days?)]]> Mad Matt F Construction Zone Fri, 26 Mar 2021 18:33:34 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117795#msg-117795 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117795#msg-117795
Part of the Ontario Rally Sprint Championship.

Loom Lake Rd. near Catchacoma Ontario

https://www.facebook.com/groups/1010398825799223/

Cheers. ;)]]> Mad Matt F Construction Zone Wed, 28 Aug 2019 22:41:11 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117794#msg-117794 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117794#msg-117794


]]> Mad Matt F Construction Zone Wed, 28 Aug 2019 22:37:52 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117793#msg-117793 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117793#msg-117793
Where was that?]]> Vincent Gagnon Construction Zone Wed, 28 Aug 2019 22:34:04 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117792#msg-117792 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117792#msg-117792
The Justy f'n rips. First time on stage since 2014, new co-driver, and me wanting to only "shake down", we were above mid pack (20 sec back on 3.5 min stage) and there was lot's more to go.

Sir RC the III, ignition curves??? redline??? I lost the tach and couldn't get it working in time with the new module... by ear man... as for curves... who knows... it's just explosions once in a while, sometimes they hit the right moment.

We had 4 good stages, but somewhere along the line my homebrewery oil system was loosing oil. At service we were down 5 litres!!! (the stock sump is 2.8, my dry sump reservoir holds 6.5, but I usually just run 6 to let the top swirl... (de-aerate). I topped it up, er filled it... but the damage was done, a slight rod knock AGAIN... but I will blame this on hot oil. I broke the end off the oil temp gauge Friday refitting the oil pressure bypass block, that might have been a good indicator, but from the sound, I just need to throw some bearings in and it should be good to go again. Now to find the leak...

It is so fun to rip that little car... it makes great sounds, and is just a hoot!

My Nephew stepped up last minute to jump in the silly seat... he posted the phone zip-tied to the cage vid of the first 2 stages, we forgot to turn it back on for stage 3,4. and Stage 5 I noticed the rod knock and backed off.



]]> Mad Matt F Construction Zone Wed, 28 Aug 2019 18:57:37 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117788#msg-117788 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117788#msg-117788 Right on!

What's the difference in ignition curves between the two?
New rpm redline as well?]]> culberro Construction Zone Wed, 21 Aug 2019 19:42:06 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117787#msg-117787 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117787#msg-117787
Engine by Subaru, carburetion by Mikuni, oiling by Chevy, and now ignition by Chrysler.

The Frankenbitch runs!]]> Mad Matt F Construction Zone Wed, 21 Aug 2019 14:14:24 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117785#msg-117785 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117785#msg-117785 Mad Matt F Construction Zone Tue, 20 Aug 2019 19:37:01 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,117782#msg-117782 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,117782#msg-117782
Why always weird stuff last minute???

Rally sprint this Saturday, should be fun.

Justy was running AWESOME... tinkering with a few things, suddenly today... NO SPARK. None.

None at the coil, none at the plugs.

Pick up coil (not hall effect) in the disty, not other electronics in the disty. Some supposed "Ignition module" under the dash - that I assume is the culprit- which will be NLA... 1988...

I tested the pick-up coil, about 1000 ohmns... and it gives a voltage signal when I turn it over, so I suppose it's good.

I wasn't really mucking with wires... so not sure what happened, but went from start to no start just like that. Not much time for diagnostics and ordering parts at this point...

3 cylinders... any thoughts on what I get for a quick, fast aftermarket ignitor thingy that will take my pick up signal and make my coil fire at the right interval? I mean I could make Jeff tap wires together really fast???]]> Mad Matt F Construction Zone Tue, 20 Aug 2019 18:10:32 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,114604#msg-114604 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114604#msg-114604
Thanks Robert.

Pedal'er down! ;)]]> Mad Matt F Construction Zone Mon, 06 Feb 2017 12:56:36 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114603#msg-114603 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114603#msg-114603
So Mean Piston Speed is the deciding factor on RPMs if you're not worried about the rod and piston parting ways. As a general rule of thumb 20m/s-22m/s works with stock (thick) rings, cast pistons, and good oil.
The b230 volvo in the rally car has an 80mm stroke, and HEAVY cast pistons with decent rods. That engine has sustained 8k rpm for minutes at a time, and lived over 6k rpm for most of 25 rally races.
The MPS was 16m/s-21.3m/s for 6k-8k rpm.
If the valves aren't floating and you're still making power, there's no need to be worried in that range.

For the Mighty Justy: 16m/s is 5780rpm and 22m/s is 7950rpm... as a reference.

Also, you can still make power when floating the valves, if done properly. Read up on valve lofting, it's pretty cool!]]> Robert Culbertson Construction Zone Mon, 06 Feb 2017 11:50:19 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114599#msg-114599 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114599#msg-114599
Data? Data?

What is this??? Can't we just theorise on some unknown and solve the problem???

Meh... I thought this was a site for bench racing... ;)

Okay best I can do at this time, is:

Single overhead cam… rockers, don’t have one to with me to measure right now.

Valve springs
length 45.5 mm
Diam 27.5mm
Wire diam 4mm

Cam
Intake
Valve Opening = -2.4 'BTDC
Lobe Center = 108.2 'ATDC
Valve Closure = 26.4 'ABDC
Duration = 204 Crank Deg
Max Cam Lift = .20673 IN.
Net Valvelift = .3101 IN.
Lobe Area = 16.34 IN. *Deg

Exhaust
Valve Opening = 29.3 'BBDC
Lobe Center = 109.4 'BTDC
Valve Closure = -2.4 'ATDC
Duration = 206.8 Crank Deg
Max Cam Lift = .21142 IN.
Net Valvelift = .31713 IN.
Lobe Area = 17.35 IN. *Deg



Bore x Stroke: 78 mm x 83 mm

Piston 234 g
Wrist pin 83 g
Rod 474 g
Rod, pin, piston 791 g
Rod centers = 13cm

I remember years ago JVL looking at a rod and commenting on how beefy it was for "such a pissy little motor" ;)

Compression 10.5:1]]> Mad Matt F Construction Zone Sun, 05 Feb 2017 22:14:37 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114598#msg-114598 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114598#msg-114598 What's the stroke of the engine?
How thick are the rods? Weight of the piston?

I do know that a stock b230 (80mm stroke) Volvo bottom end can sustain 8k rpm for a few seasons once you toss in some stiffer valve springs. I know nothing about the mighty justy.]]> Robert Culbertson Construction Zone Sun, 05 Feb 2017 19:06:31 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114597#msg-114597 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114597#msg-114597
So I stop just before I put dents in the hood?

Seems a 1000 more rpm isn't that much, and if it's still making power, there's no valve float right? So in theory the valve train is fine at that rpm?]]> Mad Matt F Construction Zone Sun, 05 Feb 2017 17:57:46 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114592#msg-114592 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114592#msg-114592 mekilljoydammit Construction Zone Sun, 05 Feb 2017 12:04:12 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114591#msg-114591 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114591#msg-114591
Justy's stock redline is 6000 rpm. In stock form, I always felt it fell flat at 5500, and would rarely exceed that since it seemed to be a waste.

Now, with all the changes (cam, header, carbs, compression; stock bottom end), it makes power past 7000! Before the drysump I was trying to be careful and not spin it too fast, although often found myself creeping towards the 6500 mark.

Yesterday, in part due to experimentation, and in part due to the wonderful sound... I was running up to 7000 maybe a bit more ;)

I understand having the valve-train fly apart is one issue, but if the motor "seems happy", shall I continue to reach for the limits?

Do I just paint the tach numbers white? ;)]]> Mad Matt F Construction Zone Sun, 05 Feb 2017 10:12:21 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114587#msg-114587 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114587#msg-114587
Dang!

So I drilled out a vent from above the plugger to the relief passage. Lapped the pump housing faces and used a thin paper gasket with grey silicone. Held up to 120 psi of air over oil... so thought I'd try it out again.

Went out to a MCO snowcross today. Well, the last hour or so. Still had to put the pump in this morning and test it yadda, drive 2.5 hours... yadda.. got 3 runs in plus some puttering around the place.

Steady Eddie at 55 lbs. I might up it a bit? But happy to report it seems to function.

More testing, and Lanark?]]> Mad Matt F Construction Zone Sat, 04 Feb 2017 20:12:04 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114549#msg-114549 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114549#msg-114549
http://hydraulicspneumatics.com/site-files/hydraulicspneumatics.com/files/uploads/2012/11/PressControlValveFig2.jpg

here

http://hydraulicspneumatics.com/200/TechZone/HydraulicValves/Article/False/6411/TechZone-HydraulicValves

Going to try it, and if it's all wonky I can replumb it elsewhere.]]> Mad Matt F Construction Zone Tue, 24 Jan 2017 08:55:57 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114547#msg-114547 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114547#msg-114547
Thanks for chiming in.

The valve uses the stock Melling plunger, and the stock "dimensions" of the valve assembly. I only have a cheap caliper, and a selection of drill bits, so the bore of the hole might be the issue... The chamfer is pretty good, but maybe more. I'm thinking I'm going to chuck it in the drill press and just run some fine paper on it a bit... just for a bit more clearance.

Yes, this is my concern, I guess the relief gallery "should" be at a lower pressure then then main gallery, but how much? and will that be an issue. Yes, I guess I could plumb it back with a small line to the sump. Man, too many hoses!

I think I might try to the relief gallery and see what happens, then I always plug that and add a line to somewhere else.

Re membership, yes, I should renew! Not sure if we'll run anything this year, but Lanark sounds fun!]]> Mad Matt F Construction Zone Mon, 23 Jan 2017 18:49:11 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114546#msg-114546 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114546#msg-114546
The plunger needs to be at least 3x the diameter to help prevent binding by cocking to one side. A decent chamfer or better a radius on the ends will help as well.

Second, as drawn the vent pipe to the spring cavity will fill with oil when the relief valve opens and there is some backpressure in the drain line. The backpressure might also alter your relief valve dynamic operating point by exerting that backpressure on the top of the plunger.

Route the drain back to the block someplace separately.

Need a club membership?]]> Martin Loveridge Construction Zone Mon, 23 Jan 2017 16:37:51 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114545#msg-114545 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114545#msg-114545
Much thinking... when I made the oil relief the fit on the piston/shuttle was "nice" moved easily, but certainly not loose.

(See "oil relief 1", for the schematic drawn in this awesome CAD program called, yeah ... powerpoint, argh, and a poor photo of the set-up with the valve being in the chunk of aluminium)

Last night when I pulled it apart it was "jammed" I had to tap it out with a hammer, not a BFH, but you know tap tap tap... So what happened? Oil smoodge?

So I need to clearance that, but then I thought...

"Man if oil gets by the shuttle, then it will fluid lock it from behind." So I need to provide an out for the oil if it goes around the shuttle. I would prefer to not dump it on the block, so can I do as following (See oil relief 2). Will that work? or will that just equalise and it wont move? I mean pressure being equal everywhere? or am I over/underthinking?

Thanks!

;)]]> Mad Matt F Construction Zone Mon, 23 Jan 2017 09:42:49 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,114544#msg-114544 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,114544#msg-114544
So my first attempt at driving Monster Oil Justy in anger today was a failure... because global warming has made it's mark, and dead of winter in Ottawa is +5 C... Don't fawk with me Oil Sand Burners... we're doing this. ;)

Anyway... we didn't run, but I drove the beast around the lot pushing 100 lbs of oil pressure and contributing to the rise in global temps through particulate matter dispersal via quasi burned oil on the exhaust from the leaking medley of small block chivy pumps I have cobbled together...

Turns out you need some clearance for a relief valve to work... and the valve jammed...

I will win.

;)]]> Mad Matt F Construction Zone Sun, 22 Jan 2017 22:43:53 -0600 https://www.rallyanarchy.com/phorum/read.php?5,51279,113149#msg-113149 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,113149#msg-113149
Quote
Mad Matt F

Those pics look like what I was seeing.

That makes me feel better!

Thanks![/quote]

Yeah; though it shouldn't look like that by the time it gets to the pump inlet. Speaking as a guy who worked in one of the world's top R&D labs for fluid film bearings (ok, granted, there's not a hell of a lot of them) for a couple years I feel pretty confident in saying that bearings work better if you feed them more oil and less air.]]> mekilljoydammit Construction Zone Sat, 13 Aug 2016 17:47:10 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,113146#msg-113146 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,113146#msg-113146
Quote
mekilljoydammit
From bench-running some oil stuff, yeah, it aerates like a bitch. Pretty much every time oil goes from high to low pressure, air wants to come out of suspension and foam crap up, but almost nobody ever sees it.

http://i.imgur.com/pcicdnZ.jpg
http://i.imgur.com/gV82Qfu.jpg

Couple pictures I took once when bench-running an oil pump on a rotary to make everything was working right - all that oil in the pan was nice and transparent before I was running the drill to drive the pump, and you can see the foamy oil returning to the pan down the front of the engine. And that's with brand new oil and not even with the engine running or anything.

.....

Those pics look like what I was seeing.

That makes me feel better!

Thanks!]]> Mad Matt F Construction Zone Sat, 13 Aug 2016 12:45:05 -0500 https://www.rallyanarchy.com/phorum/read.php?5,51279,113145#msg-113145 Re: School me in the ways of intaking fuel and air... https://www.rallyanarchy.com/phorum/read.php?5,51279,113145#msg-113145
http://i.imgur.com/pcicdnZ.jpg
http://i.imgur.com/gV82Qfu.jpg

Couple pictures I took once when bench-running an oil pump on a rotary to make everything was working right - all that oil in the pan was nice and transparent before I was running the drill to drive the pump, and you can see the foamy oil returning to the pan down the front of the engine. And that's with brand new oil and not even with the engine running or anything.

Real deal expensive dry sump tanks incorporate a lot of baffles; check out http://aviaid.com/shopsite_sc/store/html/dry-sump-tanks.html which has some nice cutaways. The point is kinda to both swirl the oil around and try to centrifuge the air out, but also make it bonk off a lot of surfaces to give it more time for the air to come out.]]> mekilljoydammit Construction Zone Fri, 12 Aug 2016 08:46:01 -0500