88GT Road Race car build with a 3.4TDC (Page 2/18) Will JUN 10, 11:39 AM The calipers pictured will also work with the 11.25" LeBaron rotor upgrade. darkhorizon JUN 10, 11:49 AM quote Originally posted by Will: The calipers pictured will also work with the 11.25" LeBaron rotor upgrade. I'll try to fit them. I may actually try running a wheel spacer under the rotors in the front to make them fit. cvxjet JUN 10, 12:45 PM I should have fully read your post at the beginning........ I have the 88 calipers up front with 12" C4 Vette rotors- they work very well and clear my 16" wheels (Would not clear 15") Also, I have a 3.4 F-body long block under the stock L44 induction/controls-So 160 HP but 200 Lb/Ft)......2 years ago I was taking a shortcut on a Sunday and came upon some guys doing a clandestine Gymkhana in an industrial parking lot....Just cones. I watched for a bit and the head guy was driving an S2000- We talked and I stated I'd always wanted to try a cone course. He rode with me at first (Hard to know which side of which cone...) and then after a couple of laps he got out and I went at it for 3 laps....after the third lap he came up and told me I had beat his time......(He was an ex-Miata racer and was stepping up to the S2000...On a longer couse his S2000 would have been able to make use of it's superior HP) I have done some odd things with the way my Stabilizer bars are mounted- improve both turn-in and cut back on DTO...and with 200 lb/ft of Torque, it is a monster from 0-30(Like in a cone course)(General G-max All-season tires...Don't know what tire the S2000 was running) darkhorizon JUN 10, 12:49 PM I'm interested to see why this car behaves so differently at high and low speeds. I have a small feeling its not an autocross setup as it is now, but I also need to grease the swaybars (forgot to do that, whoops). cvxjet JUN 10, 02:31 PM What speed range are you talking about? I had a 73 mach 1 that rammed every bit of air below the hood into the engine compartment, where it had nowhere to go (Hood area is 3000 sq in so 1/10th PSI += 300 lbs of lift) So I made a custom airdam and then BLOCKED off the whole grill- the only air allowed in the engine compartment was Below the bumper- the width of the radiator. The car (Before) would float above 65 mph, but after I had it up to 95 mph and it was rock solid. My 87-88 base car nose rams too much air in- I had my Fiero up to 90 and the headlight doors popped up....SO some venting plus blocking off a bit of intake would show improvements.....You want no lift, just enough air to cool the radiator/engine (Plus brakes) The GT nose is better aerodynamically but not perfect....Possible use some lexan to cover the outer edges of your opening and then run it to see aero behavior (And watch for overheating)......(More and more air into closed space equals hotter...Better to get air OUT more than comes in so low pressure which equals colder air) ignorant prodigy JUN 10, 03:28 PM what're the plans/goals for racing? darkhorizon JUN 10, 05:15 PM quote Originally posted by ignorant prodigy: what're the plans/goals for racing? Goal is to run a 12:1 power to weight wheel to wheel class. From there maybe I'll start to do some unlimited horsepower stuff and chase lap times? Yet to be seen there. RacerX11 JUN 10, 05:17 PM The big car (Camaro/CTSV) Brembos will require 1.25" thick rotors, and are really designed for diameters in the 13"-14" range. Due to this the mounting ears are longer, and it may be tough to package them with a 12" rotor. The '88 Fiero and C4 Vette 12" rotors are 0.88" thick, so they will definitely not work. 4th gen F-body rotors are 12" and 1.25" thick. For '88 Fiero calipers, the pads for Wilwood Dynalite calipers are really close. With a little grinding on the backing plate and drilling out the retention pin holes, they will fit the Fiero calipers. There are a lot of pad options for the Wilwoods Craig71188 JUN 10, 06:12 PM Carbotech makes race pads for the Fiero caliper(s) in multiple compounds: https://ctbrakes.com/product-search/ The P.O. of my '88 race car swore by them (and was running stock sized rotors). I intend to use them as well, especially since we are going "light" with Ecotec power, stripped chassis and staying with a 15" wheel (again, weight savings). Yes, good ducting to the brakes (and hubs) will increase life expectancy dramatically. darkhorizon JUN 10, 09:14 PM I love the Carbotech idea, but man for over $550 a set I'm a little hesitant although with a rotor upgrade these would work great. The dynalite option below is under $150 for pads, and any brembo I buy would be under $250 with effectively 3x more life expectancy of either the dynalite and carbotech options.... Its easy to spend money on them but I wouldnt be that happy about it. quote For '88 Fiero calipers, the pads for Wilwood Dynalite calipers are really close. With a little grinding on the backing plate and drilling out the retention pin holes, they will fit the Fiero calipers. There are a lot of pad options for the Wilwoods This is very attractive if I can get the corvette 12 or Guru 13in rotors up front easily. The sad part is I will still want to buy a few calipers to have some spares and whatnot.... I just really hate the design of the 88 caliper and their availability. quote The big car (Camaro/CTSV) Brembos will require 1.25" thick rotors, and are really designed for diameters in the 13"-14" range. Due to this the mounting ears are longer, and it may be tough to package them with a 12" rotor. The '88 Fiero and C4 Vette 12" rotors are 0.88" thick, so they will definitely not work. 4th gen F-body rotors are 12" and 1.25" thick. I'm not set on any specific set of calipers, I am sure I can find a set of reasonably price brembos that will fit, likely off the hondas as they use a 12in rotor on them with a 1in thickness. The C4 is probably about a 0.88 thickness which shouldnt be too hard to deal with..... $460 for the calipers here, and probably $150 for rotors and centric rings?