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Old 08-14-2009, 11:02 PM   #29
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Great job Mike!
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Old 08-14-2009, 11:07 PM   #30
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Originally Posted by GTAHVIT View Post
Mike, I'm sold, once you let slip on wheel and tire configs, I'm in. But I'm still gonna go with 20's.

when you have time, can you educate me on why wider rears than fronts increases understeer?

I'd like to learn why this happens.

Can't wait to see the details.
Wider rears grip more than the smaller fronts so in a corner the fronts will start losing grip before the rears, hence the car starts to "push" to the outside of the turn or "understeer". If the rears start to lose grip first then the rear wants to swing around on you so it's considered to "oversteer" meaning the car wants to turn sharper than you've steered for. Understeer is when it doesn't want to steer as sharp as you're steering for.

Neutral is when it goes where you steer it without either understeering or oversteering. Neutral has the best balance and typically produces the fastest times in most cases.
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Old 08-15-2009, 12:33 AM   #31
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Less grip more slip.
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Old 08-15-2009, 02:27 AM   #32
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This is such great news!
Will you tell us which tires you're using?
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Old 08-15-2009, 10:00 AM   #33
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Sorry to ask again but... No rubbing under extreme cornering? With Race tires? Was the rim 19x10?
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Old 08-15-2009, 10:01 AM   #34
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Very cool! Feel free to shoo me off, but just wondering if you had to modify anything? I'm guessing it required your coilovers for clearance but anything else have to get tweaked?



Nope.
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Old 08-15-2009, 10:04 AM   #35
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This is such great news!
Will you tell us which tires you're using?
Bridgestone RE-11.
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Old 08-15-2009, 10:13 AM   #36
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It is important that everyone understand Pedders does not make partsfor race cars. Pedders builds bits for the enthusiast that wants 90% of track handling with about 90% of OE comfort. Becuase most street vehicles have more RWHP, BHP and weight than the largest tires that will fit in the wheel well can handle they are diving an under tired car. A Formula 1 car weigh about 1500 pounds and the rear wheel are t h i s w i d e. For a Camaro that weigh more than twice as much the rear wheels would need to be t h i s w i d e . Becuase we have so little rubber under our very fat street cars that occiasionally see the track we are under tired. That mean our coil, damping and bushing rates must be much softer or we over heat tires and get slow by working them too hard. This is why Pedders streetable (soft) urethane and daily driver comfortable coil and damping rates work well on the track.

I take our bits to the eXtreme with project cars to deomonstrate this. The Camaro will beone of our most exciting projects to date. I hope you enjoy our build as much as we are.
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Old 08-15-2009, 10:45 AM   #37
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Old 08-15-2009, 10:57 AM   #38
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Does anybody know how the speedometers are calibrated on these cars? Is it computer controlled where you can enter the revolutions per mile of a tire and it calibrates the speedometer?
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Old 08-15-2009, 11:12 AM   #39
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Yea...this question has been asked a couple times in the thread with no answer.

How's the speedo going to be calibrated for the different diameter wheels?
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Old 08-15-2009, 07:25 PM   #40
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Quote:
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Wider rears grip more than the smaller fronts so in a corner the fronts will start losing grip before the rears, hence the car starts to "push" to the outside of the turn or "understeer". If the rears start to lose grip first then the rear wants to swing around on you so it's considered to "oversteer" meaning the car wants to turn sharper than you've steered for. Understeer is when it doesn't want to steer as sharp as you're steering for.

Neutral is when it goes where you steer it without either understeering or oversteering. Neutral has the best balance and typically produces the fastest times in most cases.
Much thanks!

I Didn't understand the balanced part. as in why it matters to have the same size tires... But your explanation clears that up.

Thanks man!

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Old 08-15-2009, 07:44 PM   #41
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Bridgestone RE-11.
I've heard fantastic things about this tire. Would you care to comment briefly on how you think it compares to the stock Perellis?
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Old 08-16-2009, 01:04 AM   #42
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Hi Mike,
On my Camaro, I want to follow you guys and drop wheel/tire size down to (Probably - 19" wheels with 305/30ZR19 all the way around) for track tires. I am going to hold off until Pedders finishes development on the track suspension and put that whole KIT on my Camaro over the winter when the kit is ready. My Goal is to make this car handle as best I can for use in SCCA SOLOII and select road racing events - still keeping it street legal - hopefully with the 20" RS/SS stock tire/wheel combination for the street.

I will swap the race tires with the street tires and vice-versa depending where I want to drive (hopefully I can do this - the wheel sensors and TPMS, I assume, will need to be re-calibrated) when switching tire/wheel sets.

I was able to do this Tire/rim swap method with My 2005 corvette. One set of mounted tires for track, one set mounted for street. (all were 19" and the track tires were close to the street sizes).

Any Idea if I can do this effectively?

I also have a couple of questions for you RE: camber plates and pillow ball bearings for the camaro. Are these going to be able to be built for the camaro? Will they be part of the track Kit once done?
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