Championship Tech

#1

Guys:

We will be checking A LOT of parts on Spec E30 cars during the National Championship races at Mid Ohio.

Some examples…

-Shocks
-Engine components - don’t ask, it’ll be a surprise
-Diffs - ratios and lockup percentage
-Engine output - chassis dyno
-ECU’s
-Various other items
-Anything that is protested by a driver

Some cars will be selected for tech and some will be chosen at random. My car will be checked as well and anyone is allowed to protest my car, per the CCR rules.

I really, really, really, hope that we don’t find any performance enhancing illegal mods, but we will be looking.

Carter

#2

yea dyno time!

#3

How do you check the lockup on the diff? Seems useful to know if my diff needs a rebuild or not.

#4

I’ve talked with a few "pros" about it and they suggested I weld (or have welded) a large nut onto the center of a plate that has the correct wheel bolt pattern drilled.

Jack on side of the car with the plate bolted-on like a wheel and put the torque wrench on it. When it rotates, measure the torque.

I’m still getting the exact numbers to expect but I’ll have it all ready by the time we go to Mid O.

Carter

#5

Carter wrote:

[quote]I’ve talked with a few "pros" about it and they suggested I weld (or have welded) a large nut onto the center of a plate that has the correct wheel bolt pattern drilled.

Jack on side of the car with the plate bolted-on like a wheel and put the torque wrench on it. When it rotates, measure the torque.

I’m still getting the exact numbers to expect but I’ll have it all ready by the time we go to Mid O.

Carter[/quote] that’s interesting and also makes alot of sense, i’m curious to how our stock non-rebuilt looks compared to others.

#6

Carter, others… instead of the custom welded piece, try this: Jack up the passenger side of the vehicle. Affix to one of the wheel’s 17mm lug nuts one of those indicator-type torque wrenches. Going clockwise, so as to not loosten the lug nut, measure the deflection of the dial. For an old 237k differential I noted 45ft-lbs before the wheel started to rotate. On two freshly rebuilt units the numbers were 52 and 55. Hope this helps. Regards, Robert Patton P.S.the torque numbers aren’t too scientific as the pointer on the wrench has been replaced with a taped-on nail and sometimes the nail and tape wrap stick to the indicator.Can you say "redneck"?

Post edited by: patton, at: 2006/09/01 12:36

Post edited by: patton, at: 2006/09/01 12:37