Road Race School Impressions
1st - my car is capable of doing things I never thought possible. I can be going 60mph, hammer the brakes, whip the wheel right to avoid an obstacle & then left to come in behind it & stop straight. Fuggin ABS is amazing!
2nd - Goodyear Eagle F1s are damn good cornering tires, but they are limited stright-line tires. They held fast in corners that scared me to begin with, but I could break them loose at will in the straight-aways. (w/275s up front & 315s on the rear)
3rd - Eibach Pro springs & HAL adj shocks my not be good enough for you serious road race guys, but I think this setup is ok. Since I haven't found it's limit in turns yet & I still want to drag race. I had the fronts set to 5-6 & the rear to 8 and it felt like it was on rails.
Again, I'm not trying to irritate anyone, just posting my results/impressions. If I was going to get into some serious corner carving I would probably make some changes, but for what I want to do I think this will work. Tho I think I do need heavier spring rates. The car will bottom out if I hit bumps at speed.
And I am going to slap some Toyo RA1's on the car for my open road race & hope they stick better.
Lots of power on the roadcourse needs a) a well balanced chassis, superbly dialed in suspension and most importantly b) intense brakes. A full roll cage as well of course.
Last edited by SouthFL.02.SS; Apr 17, 2007 at 01:38 PM.
HALs are a very nice shock, but not designed to take the heat and abuse cornering dishes out.
Welcome to the world a drag racing in 2 different directions, connected with a turn at each end.
And very careful use of the right foot. Road coarses are all about the line and not the right foot. It's great that there's another road junkie out there. It's also great that you did so well in a car that runs the 1/4 so fast. That's tough to do.
As you've found out road coarses will bring out every weakness in the car. Brakes, power steering, oiling/cooling, fluid transfer, etc. all get tested in a much different way than drag racing. I've gone thorough this with early small-block Chevys but am just now diving into LS territory. Much is the same, just different equipment.
Bilstein will re-valve bases on corner weights and spring rates and work quite well, unless you want to go into the spendy Penske remote reservoir/double adjustables
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As you've found out road coarses will bring out every weakness in the car. Brakes, power steering, oiling/cooling, fluid transfer, etc. all get tested in a much different way than drag racing. I've gone thorough this with early small-block Chevys but am just now diving into LS territory. Much is the same, just different equipment.
Bilstein will re-valve bases on corner weights and spring rates and work quite well, unless you want to go into the spendy Penske remote reservoir/double adjustables
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also, www.chinmotorsports.com does VIR
The brakes (Eradispeeds with Hawk pads) did a superb job. I was able to scrub all the speed I needed to going into turns. They never once faded on me. But I was only making 15-20 laps at a time.
The power steering unit was growling during the cone tests, and the car was over heating. But once I got rolling down the road course and got some air movemnet, it was all good. But again, I was only driving for 1/2 hr.
I need to manually shift the tranny. Coming out of a turn with a blower & a looser stall with the trans making the decisions is a BAD combination!
The car felt like it was on rails. The instr told me that means I wasn't going fast enough. Of course if I had been going "fast enough", I'm sure the shocks would have become an issue. But with subframes, a roll bar, stiff shocks & big sway bars I liked how it felt. (see opening statement where I admit I know nothing)
But I know people like Mitch & Sam & Boyce etc are right. If I was going to get serious about cornering, I would need to make some changes. There is NO way my car will hang with a Z06 or a Lotus in hard turns the way it is now. But I think it will be OK for my open road race where the turns are softer, but much faster. Well, I will want heavier springs rates on it....Eibachs bottom out on a 4000lb+ car when you hit big bumps at speed.
The power steering unit was growling during the cone tests, and the car was over heating. But once I got rolling down the road course and got some air movemnet, it was all good. But again, I was only driving for 1/2 hr.
QUOTE]
1/2 hour is a lot. When you get into a lead-follow with an equal car/driver that makes you push yourself, after 20 minutes most people are done.
Don't be surprised if your power steering dies. Heat is a killer for the pump. Syns are not the best answer IMO. Having dealt with a plethora of P-pump (early GM and still used on GM trucks) problems the best fluid I've found is the stock GM fluid, and this is backed up by a former Saginaw engineer. Lee's Power Steering is building a new pump for me with a smaller liner (pump ring), revised output pressure, trick shaft, and -10 input to accomodate a remote KSE filter-reservoir (see my website.) We're also going to flip the pump uspide-down to allow for better reservoir mounting and feed lines. At every track event someone blows up a PS pump, it's something most don't even think about, and just slapping a cooler and syns at it won't fix the root cause of failure.

Pat
And cut the old man some slack will ya? I'm doing the Bonneville 100 in June. That's why I took this class. It's hard for an old drag-coger like me to learn that turnig the steering wheel INS'T a bad thing!
The brakes (Eradispeeds with Hawk pads) did a superb job. I was able to scrub all the speed I needed to going into turns. They never once faded on me. But I was only making 15-20 laps at a time.
The power steering unit was growling during the cone tests, and the car was over heating. But once I got rolling down the road course and got some air movemnet, it was all good. But again, I was only driving for 1/2 hr.
I need to manually shift the tranny. Coming out of a turn with a blower & a looser stall with the trans making the decisions is a BAD combination!
The car felt like it was on rails. The instr told me that means I wasn't going fast enough. Of course if I had been going "fast enough", I'm sure the shocks would have become an issue. But with subframes, a roll bar, stiff shocks & big sway bars I liked how it felt. (see opening statement where I admit I know nothing)
But I know people like Mitch & Sam & Boyce etc are right. If I was going to get serious about cornering, I would need to make some changes. There is NO way my car will hang with a Z06 or a Lotus in hard turns the way it is now. But I think it will be OK for my open road race where the turns are softer, but much faster. Well, I will want heavier springs rates on it....Eibachs bottom out on a 4000lb+ car when you hit big bumps at speed.

Eibach rear rates are way too soft.


