irish44j Josh Hickey Infallible Moderator Location: Northern Virginia Join Date: 05/25/2016 Age: Midlife Crisis Posts: 13 Rally Car: 1985 BMW 318i (M42) |
John, was just filling in my profile as you were posting about it, so no worries there. Obviously I'm aware he has a 4cyl M42 car (as the car is a 318i), and since I've rebuilt a several of M42s (and have had one in my car for four years), I recognize them quite well. As to the diff ratios, that's primarily personal preference. Since he is rallycrossing an M42 car, and I'm the currently the SCCA DC and NEDiv defending champion in an M42 318, I figure my personal preference has worked pretty well so am sharing my opinion on the matter. From a more pragmatic point of view, the 318 3.91 and 4.10 are small-case diffs with two clutch packs (25% lockup) and less strength/fluid capacity. The 3.73 (and other 6cyl diffs) are medium case with stock 40% lockup and the option to remove the spacer and put a third clutch pack in for 60% lockup. I neglected to mention this because after all these years I don't even think about it offhand. But that's why we use the 3.73 for stage (which we are admittedly new at this year) - as well as the pick-up-truck first gear being entirely useless in an M42 car with higher ratios, as you mention. As I mentioned for rallycross though, on most courses a 4.10 will require low 3rd with the M42/G240 on typical tire diameters. Low 3rd is not where he wants to be with this engine - losing time without torque and with extra shifts. With the 3.73 or 3.91 he can run entire courses in 2nd at most rallycross venues up high in the revs where the M42 makes all of its power, and not waste time with extra shifts. Not an issue on a stage course, but on a short rallycross course an extra shift or two could cost the win. |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Like I said and the new guy Josh said too: grass-o-cross, just 1st and second and have fun. Anything will do. Stage rally is another kettle of fish.. 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. |
irish44j Josh Hickey Infallible Moderator Location: Northern Virginia Join Date: 05/25/2016 Age: Midlife Crisis Posts: 13 Rally Car: 1985 BMW 318i (M42) |
On a side note, John - I did the install of your customized coilovers onto Nick Drymalski's rallycross e36 M3 (with the Subaru hats). Nicely-built setup, very impressive. |
formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
*EDIT* Edited 1 time(s). Last edit at 05/25/2016 10:11PM by formyhealth. |
formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
No doubt it'll be fun for sure. Just trying to learn from others mistakes so I don't have to myself. |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Hey Josh. thanks for filling htings in..makes a big difference and extra thanks for not going apeshit like the "I need 7.5 x 17s and 250 hp and zenon headlights" guy..(whew!) As for the actual diffs very familiar with the ZF diffs, I set up the clutch packs in one for 2 different friends 30 years ago--both who though their diffs had broken because they way the kartoffel-fresende faule sau Fritzies deliver the diff with virtually no preload (both got stuck in driveways with gravel tires on snow..They'd be embarrassed so I won't say who the owners of that Ascona B and Saab 99 were. I had been taught only 3 years before on the GKN made but same basic design "English" based diff in my Saab (20 years later still hadn't run across anybody who seems to really understand diff set up and preload.) I mentioned the 4 cylinder thing because there's been so much noise here about how end of the world those huge E36 M3 motors are and in those cases well the motor makes 200 sumpin Ft/lbs and so you don't need so much assistance..In a way I'm trying to edjimicate the young Oh Pea, cause he like YOUNG and from Portland so while he can certainly splain me all about fixie bikes and skinny jeans and sideburns he probably doesn't understand too well about the role of gearing being a torque multiplier...or as i put it for the uber-mellow Waste coasters "What the motor doesn't make for "ax", the gearing does"..... 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. |
formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
Just so you know, I don't know anything about bikes, skinny jeans or sideburns (though I've got an excellent red beard) and Portlandians are to cool for me, I live in the capital of Oregon, Salem. You've got a couple things right though, I'm young and don't know shit about shit, which is good I guess, means I've got a lot of room to grow. |
john vanlandingham John Vanlandingham Professional Moderator Location: Ford Asylum, Sleezattle, WA Join Date: 12/20/2005 Age: Fossilized Posts: 14,152 Rally Car: Saab 96 V4 |
Oh sorry.. Maybe edit your 'location" to show where you're really from... And while I have know a few real cutinas who were very friendly in the best sorta way, in general I say "meh, a little too much striving for the detached, hip, cynical thing" 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. |
formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
I would tend to agree with you, but eh, let bygones be gone by the wayside. |
Not a whole lot of hipsters in Salem, just a bunch of mall rats. I grew up just outside of Salem in the Independence/Dallas area. There are some great roads out there if you know where to look. |
Nate.Vincent Nate Vincent Infallible Moderator Location: Pomfret, Ct Join Date: 07/29/2014 Age: Settling Down Posts: 29 Rally Car: BMW 318ti |
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turoc Ozgur Simsek Mod Moderator Location: Brooklyn, NY Join Date: 06/07/2006 Age: Midlife Crisis Posts: 561 Rally Car: working on a Veedub |
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formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
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formyhealth Danny Maxwell Godlike Moderator Location: Oregon Join Date: 05/24/2016 Age: Settling Down Posts: 60 Rally Car: 1991 BMW 318is |
That's funny, I grew up in Independence as well (Went to Central High). I know there are some good roads back by falls city area. |
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