Defined 20b n/a semi p-port. 421rwhp

[classicauto]

^Did I read that wrong or are you saying you N/A ran 12.6 @ 122mph?

[NoDOHC]

This was per G-Tech and was not verifed on a track, I didn't set that much store by it (the number was used for comparison to the newer build).

I will say that it would get to 122 mph (top of 3rd) in 13.2 seconds (can look at the ECU Datalog to verify that) the g-tech may be over-estimating the speed due to suspension squat. I want to take it to a drag strip, but I will probably have to fix my oil leak on the rear differential before they will ever let me run it. I am doubtful that the 9.4:1 build will put down those numbers (See second number = 13.3 from Gtech for 9.4:1 build). The 9.4:1 build makes (gtech) 185WHp and 180Wlb-ft vs 235WHp and 165 WLb-ft from the 8.2:1 build.

I have a spec stage 3+ clutch in the car and it is absolutely amazing for drag racing. Pin the gas on the floor, wait for the tach to hit 5,000 rpm and let the clutch up slowly, results in a 0-30 mph time of about a second.

The 9.4:1 build runs out of steam about the time that the 8.2:1 build just started to pull hard (about 5,000 rpm). Since drag racing the car never really required the previous engine to drop below 5,000 rpm, it pulled very hard. It would get to the top of first gear (0-47) in 3.4 seconds, second gear (0-82) in 6.3 seconds, third gear (0-122) in 13.2 seconds, I never revved it all the way out in fourth (except on the dyno). I have the data log from several acceleration runs on my other computer. I can post it for verification.

Acceleration Numbers - peak, after launch:
1st gear - 0.77 gs
2nd gear - 0.42 gs
3rd gear - 0.29 gs

peak launch - 0.97gs

The car was WAY faster than my friend's stock Turbo II. (It still is, just not as dramatically so).

[GtoRx7]

Played around with shortening the header length, and lengthening the p-port manifold. Luckily both are adjustable to make life easy. Results are getting better, more testing will be coming soon!
428rwhp and 247rwtq

[NoDOHC]

I am starting to really like that torque curve

It is flattening right out.

A 300WHp 13B would be a lot of fun, let alone a 430 WHp 20B!

What does it drive like? Is the throttle transition unpredictable? Is it ok at low revs?

[GtoRx7]

Originally Posted by NoDOHC

I am starting to really like that torque curve

It is flattening right out.

A 300WHp 13B would be a lot of fun, let alone a 430 WHp 20B!

What does it drive like? Is the throttle transition unpredictable? Is it ok at low revs?

only on the very light throttle, such as a slight downhill on the road, its starts to buck and get a little pissed off. But cruising on a straight, and even the lightest roll on throttle is perfectly smooth. Transition is great, cant feel any hiccups or holes in the powerband. Drives very similar to just a streetport. If I didnt tell someone there was p-ports on this engine, they probably wouldnt know. Well except for the induction noise. lol

[NoDOHC]

What are you doing for cold air intake/filtration on the P-ports?

When is the build thread going to start?

Any further progress, 1/4 mile ETs or something like that (to satisfy those who won't trust a dyno)?

I guess being in Ohio, the winter has probably put a damper (no pun intended) on your progress.

Keep us posted (I really want to see that 260 W Lb-Ft that I know it has in it).

[GtoRx7]

Originally Posted by NoDOHC

What are you doing for cold air intake/filtration on the P-ports?

When is the build thread going to start?

Any further progress, 1/4 mile ETs or something like that (to satisfy those who won't trust a dyno)?

I guess being in Ohio, the winter has probably put a damper (no pun intended) on your progress.

Keep us posted (I really want to see that 260 W Lb-Ft that I know it has in it).

The p-ports just have screen mesh on them at the moment. I might start on the build thread in the next two weeks. Need to gather up all the photos and such. Due to the "test" nature of it all, no cold air box has been made. Once I get back to the dyno one more time, then I will start building the ITB intake manifold for both side and p-ports. A nice air box with cold air feeding will be built shortly after. I doubt my car will ever see the 1/4 mile, as the 5.5" tilton clutch and tall gearing of the dogbox is not cut out for a launch. But maybe I could feather it to set a trap speed. Ohio is cold and snowy. If we get a clear day it will go back to the dyno then

[GoopyPerformance]

Fantastic Build..