mad_machine wrote:
I have to wonder if a GT6 with the engine and drivetrain from a miata would be faster and handle better?
um...how about YES.
The GT6 I-6 weighs about 450lbs and the front 1/3 of it sits forward of the front wheels. Needless to say, weight distro is not great, especially with a super-light rear end. I plan to get a lighter alternator, move battery to behind the passenger seat, and get a lightweight aluminum radiator (cheap race radiators from early 90s civics on ebay are almost a perfect fit, actually!). Removing the heavy front chrome bumper also helped.
I don't recall seeing any Miata swaps, but quite a few rotary GT6s out there, and a handful of Rover 6 and 8 swaps as well. LS would be nice too... LIghter engines that can sit farther back in the bay (like a rotary) are the best bet for handling (the spitfire, which the GT6 was based on, had a small 4-cyl and had something like 51/49 distro.
Keep in mind that the GT6 tranny and diff are fine for near-stock power, but can't handle more than about 150 at the crank reliably (if that)....
People who want better handling but original engine...a few have flipped the suspension towers (whcih double as engine mounts) and moved the lump back about 6" and gotten very decent distro, but that does involve cutting the firewall a bit, shortening the driveshaft, and modifying the shifter assembly.
You can overcome alot of that the way I have:
- fat front swaybar
- stiffer front springs, lowered about 1"
- and my favorite - wheel stagger. I run about 15mm different offset front and rear, with the rears sitting out further. This REALLY settled the rear end down a good bit, plus it gives you room for a bit fatter tires in the rear than with original offset. I'm running 14x6 superlites with 185s (155s are stock).
Anyhow, there are a few decent GT6 forums out there, and a number of guys who race them out west (Steve Smith and Steve Downing come to mind). And a surprising amount of aftermarket support if you dont' mind ordering from the UK.
ok, diarreah of the mouth over....
here are a couple other GT6s to keep your interest
how very Grassroots. I actually have some suspicion that this car is the one I had as a parts car a few years ago, due to replaced right rear wing and a few other details that make me think that it used to be a track car - plus the color, which I don't think was standard. Was a total rust0bucket though, and after full strip it got the sawzall, sadly.
Mk3