4g61t.org

But here's what I got:

When I got the car, it had a 14B with 3" exh. I bogged the hell out of the launch and pulled a 16.1 at 89mph. 2.7s 60ft time. Take in mind the car has 16yr old shocks, 195/60-14s on stock rims, etc.

NOW, I have SMIC, mbc, colder plugs, SAFC at about -20 across the board, 450cc injectors, and alcohol injection (progressively controlled).

I ran at 18psi, with the alcohol injection starting at 10psi of boost and reaching full spray at 15psi, and got:

15.2 @94mph, 2.6s 60ft. BUT...

In 3rd and 4th gear, the stock clutch couldn't even come close to holding the power. When I had to shift into 4th (my last visit to the track, I could finish the 1/4mi in 3rd gear), the car would hit about 6000 and just stay there...not accelerating at all.

So I have a 4G63T flywheel and clutch I'm going to swap in. For now, I'm keeping boost at 15psi. And babying the clutch.

I'll hopefully be able to get springs and shocks soon, and if I can swing it, 15" rims with some 205s.

I also need to figure out what rpm to launch the car at. 3500 just doesn't cut it.

For the meantime, I'm glad I knocked almost a second off the ET, and pulled 5mph faster. 10psi of extra boost will do that! Once I get the clutch and suspension sorted out, I'm sure the car will be able to run WAY better ETs. Then it'll get a new head gasket and ARP studs, and eventually a bigger turbo.

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N

Your trap speed was still 89mph on the second run or is this a typo. Not bad at all for shaving a full second of your E.T

Crap, my bad. 94mph. Fixed it.

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1989 Mirage Turbo w/4G63T
1991 Mazda MX-5 (UK spec)
2018 Hyundai I30N