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T4 PT88 owners! TIP ratio data?

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Old Oct 6, 2009 | 07:20 PM
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Originally Posted by z28boysteve
Actually, yes....

I want to be the world's fastest 6 speed one day and I believe it to be entirely possible with the 101 once I get that setup running but taking baby steps with the 88 until I know what Im doing, how to make the car use the HP its got with the M6, learn whatever tricks to drop the ET down etc. Then apply what I learn to the 101 and try and run 8.50s and make 1500 RWHP
I just took a 101 off and put a 94 on..... Car is faster now. The 101 may need nitrous to get full use of it. I may get to the track sometime, so you might have get steal that title from me

I'm just looking for 1300rwhp with the 94, I think I've about got it, then we'll see how next summer goes.
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Old Oct 6, 2009 | 07:34 PM
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Originally Posted by z28boysteve
Actually, yes....

I want to be the world's fastest 6 speed one day and I believe it to be entirely possible with the 101 once I get that setup running but taking baby steps with the 88 until I know what Im doing, how to make the car use the HP its got with the M6, learn whatever tricks to drop the ET down etc. Then apply what I learn to the 101 and try and run 8.50s and make 1500 RWHP
My reading comprehension must be off today because I can't see anywhere that you posted that you were gunning for fastest M6. That said, I'm pretty sure that the M6 in your car is nothing like the M6 that you will need in order to run an 8.50. That's a very lofty and EXPENSIVE goal that you are targeting. Godspeed.
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Old Oct 6, 2009 | 09:03 PM
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Indeed, that is exactly why the M6 in my car will be overhauled and reworked by liberty's gears where they can prepare it to a 1500 hp level and face-plate the 1-4 gears for faster shifting. I've had the transmission gone through in the car 6 times and had 5 variations of rear axle of some point, I know what abuse racing a six speed puts down!
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Old Oct 6, 2009 | 11:35 PM
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Originally Posted by z28boysteve
Actually, yes....

I want to be the world's fastest 6 speed one day ... and try and run 8.50s and make 1500 RWHP
not enough

http://www.youtube.com/watch?v=g02m_x-HxbM
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Old Oct 7, 2009 | 12:13 AM
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What I meant was fastest 6 speed Fbody, I already knew underground had been in the 7s a long time on a T56... So yeah fastest 6 speed F Body... that's white........ and has leather....and t tops lol jk
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Old Oct 7, 2009 | 07:22 AM
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Originally Posted by MIGHTYMOUSE
I heard that this run was staged....something like tripped the beams while rolling.... Still a fast car though!
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Old Oct 7, 2009 | 08:30 AM
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FWIW I know alot of guys that run T4/88s with a V8....two of them on a 400-427"motor. Every single 88 car I know runs a T6 housing.
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Old Oct 7, 2009 | 09:01 AM
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Originally Posted by Phil99vette
FWIW I know alot of guys that run T4/88s with a V8....two of them on a 400-427"motor. Every single 88 car I know runs a T6 housing.
Im a bit confused by this statement, you know alot of people that run T4 housing 88s but every 88 car you know is T6?
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Old Oct 7, 2009 | 09:08 AM
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he means they use them as twin turbos.


well not me.. maybe he doesnt know me
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Old Oct 7, 2009 | 09:11 AM
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Originally Posted by z28boysteve
Im a bit confused by this statement, you know alot of people that run T4 housing 88s but every 88 car you know is T6?
He is saying all the T4 88s he sees are in twin form. All the single 88s are T6s.
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Old Oct 7, 2009 | 09:17 AM
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Originally Posted by MIGHTYMOUSE
he means they use them as twin turbos.


well not me.. maybe he doesnt know me
What A/R turbine housing do you have on your combo?
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Old Oct 7, 2009 | 09:20 AM
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its an off the shelf t4 pt-88 with a .96ex
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Old Oct 7, 2009 | 09:38 AM
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mightymouse, do you know your exhaust backpressure readings or ratios? what cubic inch are you? What do you put down on the rollers about 950?
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Old Oct 7, 2009 | 09:52 AM
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Originally Posted by z28boysteve
mightymouse, do you know your exhaust backpressure readings or ratios? what cubic inch are you? What do you put down on the rollers about 950?
That's about what I put down with my old PT88 and old 383...psi would hit 25ish and fall to 21-22psi at the end of the run.. I was told my Precision that I was about down making power with that turbo and was cavitating it....
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Old Oct 7, 2009 | 11:34 AM
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you don't have any idea of how much backpressure you ran though? Unless those are the numbers you just gave me, in which case with what boost pressure do you get those backpressures. seems like a very important number to know, but nobody ever has an answer.. and was your 950 rwhp on a mustang or dynojet? If I could get 900 or more rwhp on the same dyno I last put down 580 @ 11PSI Ill be psyched..

Ill be running 20 degrees of IGN timing (up from 16)
a 4" DP (up from a 3" butted up to the turbine outlet w/o any transition)
a 4" Cold side (up from a 2.5 that was down to 2 1/4 at the intercooler)
45-50 IAT temps utilizing a PT3000 + Ice water (down from avg 170 or so)
22-23 PSI boost pressure and race fuel
and fabricating an intake system so my air doesnt get inhaled from directly behind the radiator.

Hopefully those things plus a more aggressive launch and timing curve and running skinnies vs. street tires, plus the flat shift trick etc. will pick me up the necessary 220rwhp or more, and that should be sufficient for 9.80s or better with the 6 speed. (1.0 second quicker) which will be where I learn about tuning the car.
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Old Oct 7, 2009 | 03:40 PM
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Originally Posted by z28boysteve
you don't have any idea of how much backpressure you ran though? Unless those are the numbers you just gave me, in which case with what boost pressure do you get those backpressures. seems like a very important number to know, but nobody ever has an answer.. and was your 950 rwhp on a mustang or dynojet? If I could get 900 or more rwhp on the same dyno I last put down 580 @ 11PSI Ill be psyched..

Ill be running 20 degrees of IGN timing (up from 16)
a 4" DP (up from a 3" butted up to the turbine outlet w/o any transition)
a 4" Cold side (up from a 2.5 that was down to 2 1/4 at the intercooler)
45-50 IAT temps utilizing a PT3000 + Ice water (down from avg 170 or so)
22-23 PSI boost pressure and race fuel
and fabricating an intake system so my air doesnt get inhaled from directly behind the radiator.

Hopefully those things plus a more aggressive launch and timing curve and running skinnies vs. street tires, plus the flat shift trick etc. will pick me up the necessary 220rwhp or more, and that should be sufficient for 9.80s or better with the 6 speed. (1.0 second quicker) which will be where I learn about tuning the car.
Sorry, no back pressure numbers....When I was basically maxed out the turbo, I just got a new setup. Anyway, the changes you have made are going to give you about the same results I got... Note if your running C16... give it even more timing....I was at 26 deg. @ 18psi and when it hit 21-24 psi I was @ 24 degs.... All motors are a bit diff. but c16 is very forgiving and I just keep making power with my timing..

Last edited by otherwhitemeat; Oct 8, 2009 at 04:04 AM.
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Old Oct 8, 2009 | 03:41 AM
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Good to know about the timing, I dont think Ill go any further than 22 though. So what boost were you running when you had those backpressure readings so I could figure your ratio ?
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Old Oct 8, 2009 | 03:59 AM
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Originally Posted by z28boysteve
Good to know about the timing, I dont think Ill go any further than 22 though. So what boost were you running when you had those backpressure readings so I could figure your ratio ?
Those are the boost #'s ....like I said, no back pressure readings.. MY buddy just tonight made 860ish rwhp with the same turbo you got....20psi, 24 deg timing, 11.0 afr....he didn't get time to turn it all the way up...should get over 900rwhp with it though... he's got a ford 347, heads flow 330+... BTW..... you need that timing to make power...
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Old Oct 8, 2009 | 09:43 AM
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yeah Im just worried I have too many cubes, therefore too much backpressure.... for the T4 88 anyway
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Old Oct 8, 2009 | 05:20 PM
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Originally Posted by z28boysteve
yeah Im just worried I have too many cubes, therefore too much backpressure.... for the T4 88 anyway
I don't think the 20ish cubes diff to my old motor is going to matter
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