Updated: Pics on post #28. Billet turbo with SP Quick spool valve.

[Zazzn]

I demand videos, numbers or we call for ban!

 

[upgradedsupra]

Lol! Until you get traction control and fix your rear camber, you may be eatin' those words

You wanna make a bet, is this a challenge? I have a video camera too.

I have a feature, it's called playing with throttle, it's called my foot.

 

[becauseican]

I went for a ride in Brads car yesterday, and it feels really nice, the car pulls pretty hard for only 10 psi. Its hard to say how much quicker it spools that a standard GT35R as I didnt get a chance to drive it, or do any 3-4-5 gear pulls, but it is definatly 200-400 rpms quicker. Once the valve is controled better, with a second boost controller or Hobbs switch so it stays completly shut until 10-12 psi then it should really shine. I tested it on the bench, and the valve cracked open at about 5 psi, and by 13-15 psi it is fully open. It does feel a little odd though when driving, you can feel the power change with the valve opening up, it feels similar to seqential turbo's.

Randy

 

[NashMan]

it's like boost vertion of v tec eh

call it boost tec

 

[wiseco7mgt]

You wanna make a bet, is this a challenge? I have a video camera too.

I have a feature, it's called playing with throttle, it's called my foot.

This is definately a challenge, vids please! Now where can i place my bet?

 

[IJ.]

I went for a ride in Brads car yesterday, and it feels really nice, the car pulls pretty hard for only 10 psi. Its hard to say how much quicker it spools that a standard GT35R as I didnt get a chance to drive it, or do any 3-4-5 gear pulls, but it is definatly 200-400 rpms quicker. Once the valve is controled better, with a second boost controller or Hobbs switch so it stays completly shut until 10-12 psi then it should really shine. I tested it on the bench, and the valve cracked open at about 5 psi, and by 13-15 psi it is fully open. It does feel a little odd though when driving, you can feel the power change with the valve opening up, it feels similar to seqential turbo's.

Randy

I couldn't get my minireg to go low enough to stop it creeping open when I tested mine Randy.

 

[Halsupramk3]

would a small/weak manual boost controller or grainger valve help keep the valve closed a little longer?

 

[tekdeus]

The manufacturer recommends a solenoid valve controlled by a hobbs switch or standalone. I opted to use a solenoid and hobbs switch, so the valve opens as quickly as possible. A manual boost controller might have worked, but I wasn't sure if it would open as fast at the set psi. My turbo spools so fast that I need the valve to open instantly.

 

[tekdeus]

BIG UPS for Forced Performance and this billet turbo!!

Last night Duane and I went out to do some datalogging and tuning with the SAFC, aiming for 11-11.3 AFR's. All I can say is this turbo F'ing rocks!!! I'm boosting 15-16 psi on 94 octane pump gas, and full boost hits incredibly fast at 3500-4000rpm's, depending which gear I'm in, and pulls like a beast all the way to redline! The boost response is incredible and there is excellent power very early in the powerband. When cruising around it's so easy to stay in the same gear and dip into boost immediately and scoot ahead to pass a car or to make a green light. Currently I still have the spool valve plumbed directly into a boost source so it begins to open at 5psi and is fully open by 12. Because:

I installed a hobbs switch and solenoid to set the spool valve to open at 10psi, but something wasn't working right. The car would boost quickly to 10psi, then pause for about half a second, then surge ahead to 15 psi with more power. I think that either my hobbs switch didn't open soon enough, or that the valve was somehow interfering with my boost controller trying do it's job. I have 3 spearate boost sources, 1 each for the wastegate, the spool valve solenoid, and for the hobbs switch. Any ideas?

I'm not sure how to give it another try. I may have to buy a better more accurate hobbs switch, and/or install an LED so I can get an idea of when the solenoid is opening the valve. It spools so damn fast the way it is, I may just leave it.

I'm now a believer in these new billet turbos, and the company's claims that they spool faster and make more power than the regular Garrett GT cast turbos, but I guess a dyno will show if that is true. I hope to get that done next week. It pulls so hard at 1 bar of boost, that I really think this thing does flow like a 67mm turbo and spool like a 57!

 

[upgradedsupra]

Yeah, it was fun Brad. I like the tuning road. When we pulled fuel and messed with it a bit, it was a big noticable difference. I would suggest keeping it the way it is. It is a great all around turbo for both street and strip.

Duane

 

[IJ.]

I'm not "getting it" Brad, my Old 3540r with a 1.06ar turbine performed much the same as you're describing without a QS Valve.....

The only difference I can see is mine hit like a Nuke at 3500>4000 and just exploded the rears into wheelspin and smoke.

Then again my engine was far from stock so maybe it was having a larger effect than I gave it cridit for as I naver ran that combination on a stock engine.

 

[tekdeus]

I'm not "getting it" Brad, my Old 3540r with a 1.06ar turbine performed much the same as you're describing without a QS Valve.....

The only difference I can see is mine hit like a Nuke at 3500>4000 and just exploded the rears into wheelspin and smoke.

Then again my engine was far from stock so maybe it was having a larger effect than I gave it cridit for as I naver ran that combination on a stock engine.

Assuming you had it at the time, I'm sure that a ported head, oversize valves, and cams, will greatly increase both flow and spool over a bone stock head. Also on LPG with huge rwtq? + Motec?

My current setup is actually really well balanced. 1st spins, but 2nd gear and up holds traction pretty well on my 295's, and my ACT clutch is as smooth as stock and rated at 522tq. A bit of a sweet spot for a street car!

 

[IJ.]

Yep had the built motor for sure and as I said maybe I just didn't give it enough credit for the performance I got from it (I just put it down to the turbo at the time)

http://www.youtube.com/watch?v=1yB4VKx_pqM

 

[tekdeus]

Yep had the built motor for sure and as I said maybe I just didn't give it enough credit for the performance I got from it (I just put it down to the turbo at the time)

What was your rear wheel torque in that vid? Does LPG make way more TQ than gas?

 

[IJ.]

About 960Nm from memory, not really LPG has less BTU's than Gas so I'd expect less if anything, I think the Tq came from the "combination" and not just one thing.

That was on 285/35/18's.

 

[Zazzn]

doens't look like 3500 IJ looks like 4k on your tac,

My 67DDB wakes up at 4 but 4300-4500 hold the hell on!

 

[IJ.]

I'm not "getting it" Brad, my Old 3540r with a 1.06ar turbine performed much the same as you're describing without a QS Valve.....

The only difference I can see is mine hit like a Nuke at 3500>4000 and just exploded the rears into wheelspin and smoke.

Then again my engine was far from stock so maybe it was having a larger effect than I gave it cridit for as I naver ran that combination on a stock engine.

 

[tekdeus]

About 960Nm from memory, not really LPG has less BTU's than Gas so I'd expect less if anything, I think the Tq came from the "combination" and not just one thing. That was on 285/35/18's.

960Nm = 707.96 Ft/Lb :aigo: That is abnormally high torque for a 7M. On gasoline, the TQ and HP numbers are usually pretty close.

 

[MRSUPRA]

Can't wait to see some dyno results.

 

[upgradedsupra]

Judging by the tuning/driving that we did the other night I am gonna guess that he puts down around 400 at 15 psi! It is a heavy car and still pulls hard.