After I've got all my suspension work done to my car, I would like to see how my car stacks up against some of the bad boys (Like Ferrari, Porsche, Lamborghini, and other exotics). I'm going to have Jamex Springs, Energy Suspension Bushings for Front Control Arm, front/rear sway bar, poly endlinks, Spohn SFC's, IROC 36mm front, 24mm rear swaybars, IROC "Wonderbar", BMR Poly/Poly Adj. LCA's, and BMR Poly/Poly Adj. Panhard Rod. Any guesses as to what I would do on the skidpad? Where can I go to get the test done? Thanks.

[This message has been edited by Scott_92RS (edited April 10, 2001).]

 

Buy a G-Tech Pro. $150 and it will measure all of that stuff, 1/4 mile times, 0-60 times etc etc. Well worth the money, and great fun too.

Robert

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1987 IROC-Z Auto (LB9)
Black/grey interior with the stance of a streetfighter
I like to think of her as Arnold Schwartzeneger in a dinner suit

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat. K&Ns, AFPR and Air foil.

Future mods:
Cam change
New torque converter
New heads (maybe corvette L98)
Strut brace
Sub frame connectors
Ram Air

Current G-Tech times
0-60mph 6.26 seconds
1/4 14.74@100.2mph

 

The G-Tech doesn't do so well for skidpad numbers since it only measures peak instantaneous acceleration, not sustained acceleration.

 

What brand and size tires are you running? Tires are the biggest factor in handling. Chevy High Performance did a '92 Camaro with 275 40ZR17's all around with Hotchkis suspension and pulled a .95 g.

On my stock suspended '92 Z28, I pulled .89 g with Bridgestone RE900 245 50R16's. That was measured with the G-tech. Haven't run it with my new tires yet.

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1992 Camaro Z28; Engine:383 w/Ported Edelbrock RPM heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, Comp Cams 1.5 Roller rockers and lifters, Comp Cams Triple Valvesprings, SVO 30 lb injectors. Holley/Walbro 255 lph in-tank pump, Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, SLP Clutch, Pro-5.0 Shifter, 4.10 Gear, Auburn Offroad Pro Posi. Super Ram. 17" X 9.5" Ronal FireHawk Rims w/ 275 40ZR17 Bridgestone RE 730's up front and Nitto Drag NT 555R's out back.

Double-Pump This! EFI Rules!

 

I'm not sure what tires I'll be running yet. I may get 17" rims before I do the test, so new tires will be required. I am running Kuhmo ECSTA Supra 712's on the front of my car now and they have unbelievable grip for a $75 tire, wet and dry. I may get put those on all 4 corners. I will most likely get 285/40's or 295/35's (if they sell that) for the rear, and 275/40's for the front.

[This message has been edited by Scott_92RS (edited April 11, 2001).]

 

It does sustained too.

 

Apeiron, I'm almost positive it does either. Do you have one?

 

I do have one. The problem is that in peak-reading mode the G-Tech will record higher peak values due loading/unloading of the suspension, sudden driver input, whatever, even if traction isn't lost. Continuous mode is better, just to watch the display and see the highest sustainable reading reached. Unfortunately to record lateral acceleration it has to be mounted sideways in the car, which makes it a bit hard to read when your eyeballs are trying to slide out of your head through your ears.

Still a great tool/toy though, there are limitations to its accuracy, but any number you get from it is probably better than no number at all.

[This message has been edited by Apeiron (edited April 11, 2001).]

 

The problem with the g-tech is chassis roll and pitch. Acceleration and gravity are indistinguishable, so, as the car rolls tward the outside of a corner the g-tech will feel not only lateral acceleration due to the corner, but gravity as well because it tilts along with the car. If you are pulling .8 g with 5 degrees of roll the g-tech will read about .88 readings get more acurate as chassis roll is reduced. It will read higher acceleration and lower 0-60 times then you actually have due to pitch changes during acceleration. Basicly it always reads better then your car is actually doing. Even for comparasen, I wouldn't trust it because not all cars roll, squat, and dive the same. The same car wont even be consistant before and after a mod. If you take it someplace to have the test done, they will probably use a g-tech to do it so that's no good either. Aerodynamics plays a roll too, If you have a bigger circle to drive around you can go faster, get more downforce, and therefore, more lateral acceleration. If you want to compare yourself with other cars, first, find out how the test was done. How big was there circle? Did they use g-tech, or did they time each lap around and calculate it? What were there testing condition? Arazona in July, or Germany in January. Hot rubber and pavement stick together better then cold rubber and pavement. Was this test done in the alps, or near the cost. thinner high altitude air will produce less downforce. There are a lot of things that can trough these tests off and unless you are doing the test under the same conditions in the same way you can't realy compare results.