D-Uber Cars

Last tracking day experienced, "Throttle induced understeer". It was suggested (from the Cup Car Champion and instructor) that I "tighten" up the front bar a notch. At the time front was 2 from hard and rear 2 from hard. MPSC, stock sizes, already had a good tire temp. Moton Club Sport. 150LB helper springs all around. 600LB front. 900Lb rear. If I make the suggested adjustment that would put me at full hard in front, 2 from full hard rear, correct?
Suggestions appreciated.

LVDell

Have you thought about just making the rear a bit more LOOSE instead?

BTW, I have never heard of it as throttle induced understeer......rather I have heard of it as to fast an entry speed into the corner

Mr Michael B

Ummmm... If you want to reduce understeer and or add oversteer then you must stiffen the rear bar or soften the front setting.

Seems to be the opposite of the advice your getting.

Lets just say that I have my rear bar set full stiff, and drive with the tail hanging out.

BTW as Dell is leading to you can change the way the car reacts to a corner simply by changing driver inputs. I was driving a friends Cobra R that he had pushing like a dump truck at a 3:00 minute lap but my style had the car neutral in every corner and at 2:49. His attack was just different than mine.

LVDell

Bingo! Many times, it's just the driver that needs a slight change.

If you are going in too hot and can't break that cycle have you thought about using that as an opportunity to really trailbrake the corner?

roberga

I think you are talking about turn 8. There have been more challenges in resent times. I would get with Cantrell or Gregg Fordhal. Who ever did the motons should be able to help you out.

mjb

As others have said, if the problem is push, or understeer, then the advice you got will make it worse. If it feels like it's plowing (especially through lower speed corners) then soften the front a notch at a time since there is more adjustment up there, or stiffen the rear. I softened my front to one from full soft with the rear at 1 from full hard and it solved the problem I was having. Now there is a bit of understeer that's easily correctable with the throttle.
Whatever you do, make the adjustments one notch at a time.

gt3'er

I agree with the experts above...and wouldn't having a setup that allows the use of throttle induced oversteer be faster and safer?

Leigh2

Throttle induced understeer would indicate that that car pushes under throttle most likely exiting the corner rather than corner entry. Typical solutions are less front bar, more front camber, or tighter rear bar. The Motons could probably be adjusted to reduce the weight transfer to the rear which might help as well. If it's a slower corner I'd be careful tuning the car for the slower corner where there is a lot of lower gear weight transfer and subsequently screw up the handling in the more important higher speed corners IMO. I also agree completely on the driver input theory...makes a huge difference.

D-Uber Cars

Thanks all. Most likely driver (or lack of) skill or experience.
A couple more points: As Roberga suggested, at Pacific Raceways (Kent, WA) can feel in turn 8 but, mostly in exit to turn 2. For those who are not familiar, 2 is a high speed full throttle left hand sweeper. When squeezing up to full throttle, front will "push". Can re-adjust weight of car w/momentary slight lift throttle but this is not the correct way through those turns (safely or quickly).
P.S. Since car is mostly driven on street, alignment is not as agressive as Kussumaul settings.

mooty

right on.

in a tight turn, your car SHOULD push. you can adj it with throttle and turn in. if car is neutral, it would be hell scary at a fast turn.

i am also confrused with the original post. if it pushes with throttle, i would ran softer front, not tighten it up. more front camber, more trail braking, less entry speed, more lift, more rear bar, or less rear camber or combiination there of. but hey, i am no pro.

Leigh2

My car's largest handling problem is located inside the helmet...no question :>)

mooty

really? we must have the same helmet then

Leigh2

I think they're quite common.....

va122

+1 with what mooty said. Another option is to change to 800 springs in the rear or raise the rear ride height. It's a PITA though

va122

Or take compression out of the front.