shooting for 8's

[fuzionauto]

We hit our goal last year by breaking into the 9's on a stock block and ecu.

Unfortunately on our last run of the season our turbo took a crap and took out a piston.

We coasted from the 1000ft mark over the finish with a 9.89 @ 119mph

Based on the timeslip we would have ran a 9.4 if the turbo didn't go.

This year we will be running a built block with a bigger 76mm turbo, we are also scrapping the ecu for an AEM EMS.

I will be assembling the block this week.

The problem is I can't decide if its worth going to a 3.4 liter stroker.

Stroker cranks are very expensive for the Supra and limiting my RPM's with a stroker kinda sucks.

But after driving this stroked Evo 9 we just finished I'm tempted.

Its truely amazing how that extra stroke affects spoolup and TQ.

I'm torn, anyone have any suggestions???

[2point4DSM]

Stroker motors are awesome!

Less revs, more power... and since the motor is apart anyway.

Revving the snot out of a motor to make power is over-rated.

I say go for it!

[JTunedMotorsports]

I dont why you would go stroker kit when guys like Ryan Woon have been running low 9's as a 3.0 and still a 6 speed, just throw in a bigger turbo.

[fuzionauto]

Originally Posted by JTunedMotorsports

I dont why you would go stroker kit when guys like Ryan Woon have been running low 9's as a 3.0 and still a 6 speed, just throw in a bigger turbo.

Woon is running 8's now on a 3.4 liter stroker

Ironic isn't it.

I rode in Woon's car its not a streetcar, it didn't use to see boost until 6k rpms, now he has an even bigger turbo and spoolup is in the 5k range because of the stroker.

[JTunedMotorsports]

When did you ride in it? yea i know now its the Titan 3.4 stoker.

[alwaysinboost]

descisions descisions... I wish I had your problem

IMO if you are building a street car then go for the stroker. Since the car will be spending less time in the high RPM that low-midrange grunt you get from the increased displacement will be more enjoyable to drive it on the streets.

On the other hand if its going to be a 1/4mile car then I would stick with the 3.0 and rev the piss out of it. Pick a turbo that is going to work the best for the high RPM range you will be in mostly at the track...

either way its a sick car.

[wgknestrick]

You will be more reliable with the stroker and less revs

[ITSTOCK]

I WANT A DAMN SUPRA!! Just out of curiousity, do you know the race weight (without driver) on your car?

Also, what kind of 60's do you get out of that thing spraying the 100shot out of the hole?

BTW BADASS CAR! I love it!

[TurboTagTeam]

Originally Posted by fuzionauto

Woon is running 8's now on a 3.4 liter stroker

Is that the Wide Open Throttle MotorSport Car???

I like your car. Supra's scare me. Their allways up to no good

[fuzionauto]

I rode in Ryans car at the Texas meet last year.

My car is 3600 lbs with me in it.

I have worked on the cars rollout for 3 years now so it 60 ft's pretty consistent off the footbrake, high 1.4's.

Off the transbrake I can get low 1.4's (best is 1.39) but its really hard on the car.

I built it to be as fast as possible while still being 100% streetable.

I daily drive it when its nice out, it still has ice cold A/C.

Here is an in car vid at 17psi
http://www.fuzionauto.com/suprauto.wmv

[JTunedMotorsports]

very nice vid, sounds great, Ive seen and heard you rip on it in the havertown/broomall area, As Ryans car has progressed over the last 3 yrs its been less and less a street car. The vid makes me want to go get another supra and build it. Hopefully in the future.

[wgknestrick]

Nice car, but I think you should adjust your BOV unless it is like that just to hold boost. Just trying to help you out, but what do I know?

You have TONS of compressor surge from the spring being toooo stiff. You shouldn't get the wooooble's when throttle lifting at above 10psi on any turbo. You'd be surprised how much better your car drives with it adjusted properly.

Are you running a Tial?

[wgknestrick]

I thought I recognized your car from SCC shootout a couple years back. Very nice

[TehWagon]

damn, i'm subscribing just to see this in person hopefully!

[1988 Olds]

Can't go wrong with the Stroker, If you don't do it now your going to look back and wish you did.

[JTunedMotorsports]

its Hks racing BOV, Ive heard them all.

[wgknestrick]

You may need 2 BOVs at the size of that turbo. Anyways, it should not sound like that. You are putting bigtime wear on your turbo. That sound is of the CHRA (rotating wheel) rapidly slowing down because there is nowhere for the compressed air to go. You BOV can't vent fast enough.

Hell, you may even notice better times because your turbo stays spinning a little longer between shifts instead of slowing down, not to mention what it does to the exhaust flow.

[fuzionauto]

Originally Posted by wgknestrick

You may need 2 BOVs at the size of that turbo. Anyways, it should not sound like that. You are putting bigtime wear on your turbo. That sound is of the CHRA (rotating wheel) rapidly slowing down because there is nowhere for the compressed air to go. You BOV can't vent fast enough.

Hell, you may even notice better times because your turbo stays spinning a little longer between shifts instead of slowing down, not to mention what it does to the exhaust flow.

There is no surging what you are hearing is a combination of the HKS racing BOV and the anti surge housing on my turbo.

To be honest big shaft turbo's seldom have problems caused by surging.

My new setup probably won't even use a BOV, large turbo's fail more often from too much shaft rpm, which happens when the bov opens at redline and the turbo is free to spin with no load on the compressor wheel.

I do appreciate the concearn, thanks

[2point4DSM]

Originally Posted by fuzionauto

large turbo's fail more often from too much shaft rpm,

I heard this already from many sources and know it to be true. The reason a big turbo running less RPMs to build a lot of boost is always a better idea than a small turbo being pushed to it's limits.

There is a group of people in the DSM scene that believe you are wasting money upgrading a 14b or 16g if you aren't maxxing it out. These are also the same people that have already or will be shooting out turbo parts out their exhaust after spinning it way past the turbo's max rpms run after run.

Originally Posted by fuzionauto

which happens when the bov opens at redline and the turbo is free to spin with no load on the compressor wheel.

This is news to me.

The BOV opens btw shifts, right. This is when fuel gets shut off for a short period of time and causes a vacuum in the intake tract. At this point there isn't enough exhaust coming out of the motor to spin a little turbo let alone a big turbo. So unless you have an anti-alg system I don't see how it is possible to hurt the turbo while it is free-spinning with no load on the compressor wheel.

[wgknestrick]

I don't want to start an argument over this and everything here is meant to be constructive, but you have very bad compressor surge in every video I saw of your Supra on your webpage. I fought it across 3 BOVs and BOV locations on my piping before I solved it on my STI. I also agree with 2pointDSM in that in no way is a turbo spining freely between shifts doing any more harm than having it surge. The turbo isn't increasing in RPM during this because there is no exhaust driving it faster between shifts.

BOVs should only sound like compressed air being released, nothing else, or they aren't working/setup properly. I love when people buy BOVs based on how "they sound". If it sounds weird or unique, it probably doesn't work right.

My turbo has an anti-surge compressor housing on it and still doesn't make that sound. Compressor surge/stall is exponentially more of a problem with the BIGGER the turbo because the compressors are that much bigger, putting an increased burdon on your engine and BOV to move that increased air. You double the size/flow of the turbo, but the BOV is still the same, as is the volume of IC tubing. A big compressor can fill these up with compressed air in an instant.

I garantee you if you take that HKS SS off and put on 1-2 properly setup Tial BOVs, you won't hear that sound anymore and your car will be much easier to drive around town.

We are just trying to help.

Bill