Logbooked volvo 242 rally car

I see you've signed up for the next rally sprint! Can't wait to see this Swedish tank bomb through the woods!

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DexterVW
I see you've signed up for the next rally sprint! Can't wait to see this Swedish tank bomb through the woods!

Yeah! Really looking forward to it. Stop by and say hi if you see me.

Deff will, I'll be in the blue diesel golf.

Survived my first rally sprint! Had a great time and didn't break anything. All in all a great success.

I'll be competing in NEFR in just under 2 weeks so I'm working on a bunch of small prep stuff.

Today I installed my wide-band o2 gauge and sensor. According to the sensor I'm running pretty rich. In low RPM it's pretty much pegging the gauge on the rich end, and gets up to about 11.5 from 3500-7000. Cruising its hovering around 12.5, idle is similar.

Jetting:
Main - 145
Emulsion Tube - F13
Idle Jet - 55 F8
(forgot to check the venturi's)

The 145 is the smallest main jet I have at the moment, don't have any others for the idle or emulsion tube. I'm thinking maybe I need a smaller main and idle? Open to any thoughts or suggestions.

That's super rich! My turbo car would hit 11:1 at 15psi!
Aim for no richer than 12.5-13:1 at WOT, and stoich in cruise. 13:1 will probably gain you more power.

Update, current choke/venturi is 36mm.

I have a 38mm which based off some reading may be a better fit? Might swap them out after work tonight and see what happens, along with new plugs as I'm sure the current ones are not doing their best with it running so rich.

Quote
Drmike

Jetting:
Main - 145
Emulsion Tube - F13
Idle Jet - 55 F8
(forgot to check the venturi's) Choke/Venturi 36mm

Quote
Drmike
Update, current choke/venturi is 36mm.

I have a 38mm which based off some reading may be a better fit? Might swap them out after work tonight and see what happens, along with new plugs as I'm sure the current ones are not doing their best with it running so rich.

Quote
Drmike

Jetting:
Main - 145
Emulsion Tube - F13
Idle Jet - 55 F8
(forgot to check the venturi's) Choke/Venturi 36mm

On the very top of the jet stack is the "hair corrector", then the "emotional tube" and at the bottom is Main Jet..
Whatchoo have for hair correctors?

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.

Formatting...grrrrrrrrrrrrrrrrr.

motor..carbs...vent....aux vent...e-tube..air corr...idle..accell...pump..float needle jet
B21 2 x 45DCOE............. 34 ..4.5 135 F9 200 55F8 45 60 175 6
B21 Rally 2 x 45DCOE..... 36 ..4.5 145 F2 170 45F8 45 70 175 6
B21 Race 2 x 45DCOE..... 40.. ..4.5 145 F2 130 65F8 50 100 225 6
B23 std 2 x 45DCOE.... 34 4.5 135 F9 175 65F8 45 60 175 7
B23 rally 2 x 45DCOE.... 36 4.5 145 F9 175 60F8 45 60 200 7
B23 race 2 x 45DCOE..... 38 4.5 155 F9 165 65F8 50 60 2255 7
B23 Rally-cr2 x 48 DCO... 42 5.0 180 F9 140 65F8 45 40 225 14
B23 Rally 2 x 50 DCO.... 42 5.0 170 F9 155 60F8 45 40 225 14
B23 /Race 2 x 50 DCO... 46 5.0 180 F9 180 65F8 45 40 225 14


Emotional tube of F9 or F16 is about the most all round works good thing you can use.

Want to go back and check really carefully about the F-number???

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.



Edited 1 time(s). Last edit at 07/10/2017 03:36PM by john vanlandingham.

Alright most of the jetting numbers:

Jetting:
Venturi - 38
Aux Vent - 4.5
Main - 145
E-tube - f16
Air correction 155
Idle 55 f8

Changed the venturi from 36 to 38 tonight. Seemed to help a little bit, overall a/f is closer to 13 through most of the range. I put new plugs in although the old ones looked pretty good. I might try messing with the timing a little bit. Maybe a valve adjustment. The thing rips pretty good anyways so I'm not gonna experiment too much until after NEFR.

http://www.lainefamily.com/images/WeberTuningManual.pdf

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Power means nothing if you cannot control it!

Alright, not much time for an update. Ran NEFR. Made it through most of the event before going off into some small trees. Damage is limited to cosmetic and we drove it back on the trailer under it's own power. Lucky for getting away as clean as we did.

Now I'm on to BRS prep and one of the things that I would like to do is get some new struts/shocks. It has Bilstein B6's in there now. It appears there are a few options regarding valving and I know pairing them with spring rate is key. That's out of my area of experience so I'm hoping someone here can point me in a direction. (Paging J.V.)

Ultimately I will replace it with something more robust, but for now with my budget/time-frame I would like to keep it simple.


I calculated spring rates based on measuring wire, overall diameter, and effective coils.

Front: 140lb
Rear: 100lb

B6 Options are:
Front:
34-030806 - 305/206
34-030837 - 350/150
34-031520 - 300/175
34-181539 - 131/83 (according to google, oe replacement)

Rear:
24-022118 - 275/200
33-067230 - 225/150
24-002967 - 225/107 (according to google, oe replacement)

Any thoughts/suggestions are appreciated.

Ordering stateside or from Sweden?

Here are some Bilstein rally struts for your Volvo:

http://shop.forza.se/stotdampare-1/rally-rallycross-racing/volvo/240-75

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"Talk about drugs. Driving a car like that, going that fast, it’s like all the drugs at once." - Tommy Byrne

"Now, Pinky, if by any chance you are captured during this mission, remember you are Gunther Heindriksen from Appenzell. You moved to Grindelwald to drive the cog train to Murren. Can you repeat that?" - The Brain

And from another site, but also available rear rally rate springs and a threaded coil over strut housing for the front inserts. https://www.motorsportshop.nu/epages/motorsportshop_nu.sf/sv_SE/?ObjectPath=/Shops/motorsportshop.nu/Products/B46Volvo240

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"Talk about drugs. Driving a car like that, going that fast, it’s like all the drugs at once." - Tommy Byrne

"Now, Pinky, if by any chance you are captured during this mission, remember you are Gunther Heindriksen from Appenzell. You moved to Grindelwald to drive the cog train to Murren. Can you repeat that?" - The Brain

Quote
wvonkessler
And from another site, but also available rear rally rate springs and a threaded coil over strut housing for the front inserts. https://www.motorsportshop.nu/epages/motorsportshop_nu.sf/sv_SE/?ObjectPath=/Shops/motorsportshop.nu/Products/B46Volvo240

Those are great links..if this was 1995.

But still thatäs great++only nearly double what those would cost if sourced here in US.

And GREAT.. insats like that..´short lifespan..

There IS a reason why people use thick wll 4130 DOM for the tubes...

---

John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.