Pics and Dyno on my new SP63

I will try to answer a couple of questions since Steve will gone for a couple of days. Steve, correct me if I am wrong on anythig.

1. The Viper is Frank Ward's, few light mods.

2. Steve is planning on doing the dual MAF, but currently is using the stock unit.

3. Injector duty cycle was 57%!!! on the 20.5 psi run with no fuel mods. (I don't think he knows how much the fuel pump is taxed currently)

4. All dynos were a 4th gear pull.

5. I will let Steve answer the air/fuel ratios, but he is running his fuel computer set at zero (stock maps).

I drove the car at 16.5 psi (before he went to the dyno) and while the peak power number was about the same as his bpu number, the power delivery and area under the curve were greatly improved. Also, he is absolutely correct about the spool. It is identical to a bpu car in TTC.

Kflee answered most of the posts and his answers were correct.

houstonT,

The Viper belongs to Frank Ward. My Supra is his old car. His car has the smooth bore intake tubes, exhaust system, and he is waiting for his new intake manifold. We will definitely video a race between the two cars and our friends T78 RX7 shortly.

Grant,

I have no interest in a thinner intercooler at this point. I think that it's easier on the cooling system with a single turbo on a roadcourse because your intake air temps are much lower (the bigger turbo doesn't heat the air as much). I also don't go to tracks when the temps are going to be higher than low to mid 80's. I will be going to the roadcourse in March and will decide if I need more cooling system mods and a brake upgrade.

I will be going with dual MAF's since mine was at 97% I'm sure it is being a restriction.

As Kflee said, I have no fuel mods. My duty cycle was at 57%.

I dynoed in 4th. I didn't post (or tune) my a/f because the wide band was showing numbers that I didn't trust. It was showing an a/f of 14.0:1 at 5500 and about 13.0:1 by redline. My AFC didn't work on the high throttle maps and we installed a new unit that also didn't work. I didn't believe the a/f's because if I was really running that lean my car would have detonated or at least retarded the timing considering I was only running 93 octane gas. It didn't do either of these and my EGT's (mounted at the top of the downpipe) never went over about 650 degrees C. I also did a run at 16.5psi where the car made 424rwhp. The a/f's were about the same, so I am sure it wasn't because I am maxing out the fuel system. I am calling Apexi today to get the AFC sorted out and I will then go to a different dyno to see if the a/f #'s are comparable.

Jim Swantko,

I had Mark overlay my 526rwhp run with your 530rwhp run (this was your best run the last time you were there and without the ice you used the first time). It was very interesting (I'm sure some people would even pay to see this ), I was really suprised to see that the my SP63 spools about 150rpm sooner, made more peak torque (though very close), and was very close on rwhp (though you made more). If you get a chance get Mark to run you a copy it very interesting.

As far as Kflee is conserned, I will answer for him. He is working on it.

For everyone,

This doesn't mean that the SP63 is better than the PHR stage II because this was on two different cars on two different days. Jim is running a VPC with a mildly ported head and 114 octane fuel and my car has a stock MAF with stock head and 93 octane fuel with octane boost. I believe Jim also has a different intercooler. We were both at around 20.5psi. Of course Jim has the ability to turn up the boost and his VPC, ported head and upgraded fuel will really shine then.

Steve97TT,

I can but FYI the 490rwhp graph starts at 2500 rpm and the 526rwhp graph starts at 2000 rpm. They are both in 500rpm increments.

Sound Performance,

The performance of the kit is exactly what I wanted and met my criteria perfect. I really wanted a 515rwhp (thats the magic 600 crank hp with a 15% drivetrain loss) Supra that I could run on pump gas and take to the roadcourse. When I go to dual MAF's I expect to pick up about 20rwhp (just quessing). This would put me at 515rwhp at around 19psi which is very streetable on pump gas.

As far as the quality, the kit looks great. Everything fits and it looks like it was done by a profesional tuner and not put together in my garage (the quality of the parts is largely responsible for this).

I don't regret my choice at all.

Any info on powder coating my strut tower bar to match the intake pipe?

Later, Steve