No mechanical issues. Tires only have a few thousand miles on them. Have new endlinks up front from Bill Gendron. No alignment issues either. The numbers I posted is what the car is set to.

I'm getting this oversteer/light rear feeling on part throttle at mid corner. Maybe I need to get on the gas more and load the rear tires. The front gives me a lot more confidence compared to the rear. I'm starting to think it may be part driver error as well. I'll take some pyro readings next time I'm out to see what the tires are telling me.

I may still pursue going back on the scales to see whether the new front tire/wheel combination threw off the balance a bit.

Also to add to this, I also suffer low speed corner entry oversteer as well. This tends me to believe that I may have a front weight bias issue. ??

 

^ My personal preference is to have the car set up like this... Your specs are very close to what I run.

I find that on corner entry with no throttle or light part throttle the car will naturally oversteer. Again this is my preference as it helps rotate the car quickly. In mid corner I've also found that the car will continue to oversteer with little or no throttle. However with heavy throttle the car is extremely neutral or even pushes slightly (depending on speed and aero). I always felt that the car reacted this way and once I was on track in the rain it totally confirmed it! All of the car's behavior was greatly exaggerated under those conditions and believe it or not, as long as I could put the power down it was much safer to drive WOT than it was with part throttle.

Give it another try and if your still having problems try adding more rear aero. Being able to pitch the car early is a good thing in my opinion.

-Rob

 

My guess is that you wil want to adjust your rear ride height vs. the front. Corner weighting is mainly concerned with getting your cross balance equal, which is not necessarily related to front/rear ride height relation. I'm not positive, but maybe lower the rear a tad. Maybe try researching 'rake' vs. handling.

 

On the corner weight question:

As mentioned by spdracerut:
"Corner weighting is mainly concerned with getting your cross balance equal, which is not necessarily related to front/rear ride height relation."

When you corner weigh 50% cross weight is the goal. The trick is to get this by adjusting the spring perches and continue to adjust each corner so that in the end you get 50% cross and the height front to rear you want and also equal height on both fronts and equal height on both rears.

It is completely possible to have 50% cross with the left front 3/8" or more higher than the right front, the rear also uneven and the front to rear ride height messed up as well.

It takes time to get it right. Small adjustments will get you there.

On the Sway bar:

Since your Gendron bar is custom does it have 6 adjustment holes like the stock ones?
I know that the 1.25" hollow bar with .25" wall thickness would be 832 LBS/in on the stiffest setting.
There are different wall thicknesses available on the bars, usually .188 and .25 inch. What is yours?

If you have 6 holes and you are set on the stiffest your car should push like a pig.

I do not know of anyone running the Gendron bar for road racing because it is way stiff and yours is 1 5/16" which is even stiffer. The Gendron is usually run by the autox guys.

Most of the road race guys use the Saner bar if they want a stiff bar and it's 3 settings are 556, 644,739 lbs/in. very few people use the stiff setting. I have this bar and no wing and I run it on the softest setting.

If it was mine I would:
Set the ride height equal front and rear.
Try alignment @ camber -2.8 to -3 F, -3.2 to -3.5 R

 

Are you saying 4 clicks from full stiff (16)?....meaning youre at 12..(I know, confusing lol)
Does anyone else think that the SRC setting are set pretty stiff?

Have you tried your settings a 8's all around like they recommend?
I always find it that its only 1 or 2 clicks from there to get what I need.

Also, may sound silly but the comp is on the bottom and reb. is on the top. I ran into someone at the track who had it backwards.

 

Thanks for the replies. I just did some ride height measurements and here is what I got:

FL: 25" FR: 24.82"
RL: 25.06" RR: 24.88"

Looks like I'm within 1/4" all around and balanced pretty well. I guess we can say that ride height isn't the issue here?

As for the Gendron bar, I don't recall exactly what the wall thickness was. The arms do have 6 adjustment holes. Mine has an extra 1 or 2 holes drilled (which I'm currently using).

If I raise the front ride height by 1/4" and corner-balance again, would the net result be the same? By result I mean handling characteristics.

 

check your tire temp with a probe to make sure you are getting proper rear tire contact. Make sure your shocks are not going bad, either leaking oil, or have air pockets in them, you can always have them dynoed. disconnect your rear sway bar, or soften it up, it isnt ideal to transfer later load in the rear of the car. Don't try to fix a mechanical grip problem with extra down force. Are you doing a lot of counter steering? small over steer corrections are normal for mid corner part throttle. Good luck

 

Yeah... I didn't see that you had the SRC settings. Do what f20kills say... start at 8/8 and re-work it from there... The factory settings are really close

-Rob

 

Disconnect Rear sway?
Run more bump/rebound in the front? Less rebound in the rear?
Increase rear camber/decrease front camber? (Check temps across patch)
More front bar?
More wing?

Toe sounds right....