09-01-2011, 11:52 AM
Join Date: Jun 2011
Total Cats: 15
New guy building a hillclimb racecar
I guess I should introduce myself before I start asking a myriad of questions.
My names Will. I live in NW West Virginia. I recently purchased a '94 turbo'd miata that I've converted to a SSM race car for hillclimbs and time trails.
Of course, the car needs a lot of work before it will be setting any records, but it does run well and is competitive as it sits.
A quick run down of some of the more important bits:
-Disco potato turbo, 9 psi
-2 sets of 15x9 6ULs, one with 225 R1R's (street/rain tires), the other with 225 Hoosier R6's
-Ultrashield Spec Miata seats, bolted to the floor, which just barely get enough head clearance under a Hard Dog Hard Core roll bar.
It overheats after more than a few minutes on the track, so thats #1 on the list right now. It will also need 275 A6's, more power, some suspension tuning, added lightness, and something to make the brakes feel less mushy.
I've been fighting the overheating for a few weeks now. After it overheated horribly during my first time trail I:
-Cut a heat extraction hole in the hood in the usual location
-Cut a big hole in the top of the bumper in the usual location
-Flushed the cooling system and refilled with distilled water + water wetter + 15% coolant
That helped, but it was still running hot at my first hillclimb so I:
-Ordered a big AL china radiator and am having a welding shop re-locate the inlet a couple inches over to clear the charge piping.
-Built a large splitter, huge air dam, and completely ducted the radiator with AL flashing.
The welding shop is having trouble welding the thin AL in the radiator, so that's on hold for the moment, but I will be testing the splitter/air dam/rad ducting at another time trail this weekend.