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441 LSX,TFS 235,Nasty Sheetmetal Intake,Twin TC70's Turbo kit by KYTP 6spd street car

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Old 04-23-2010, 11:11 AM
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pyramid rings an option?
Old 04-23-2010, 11:30 AM
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Originally Posted by jeremym
Being that have 4 bolt TFS heads how much boost can i run before problems? Or how much HP? I just want 1000-1200rwhp. I think that would be around 10-15lbs of boost. To me that is not that much boost. Thanks for any info
Stay very low 20's unless you enjoy replacing head gaskets. 4 bolts per cylinder really limit the LSX motors. You're not going to make 1200RWHP though unless you push it to say 27PSI or so. You can do it. I can do it...but for how long. Then it's ok I'll take another set of head gaskets thank you.

Here's my Turbo specs for comparison.
*Charlies Turbo's
Max. Rated HP=780
Part No=PT-67
Compressor Wheel Dia.=66.548mm, 84.074mm
Compressor Wheel Trim=63
Compressor A/R Ratio=?
Bearing System=360 Race
Turbine Wheel Dia.=81.28mm
Turbine Wheel Trim=85
Turbine A/R Ratio=.85

I'm running through a TH400 which eats about 100RWHP on the dyno from my experiance. So I'm 900RWHP at 19PSI and 1000RWHP at 23PSI. Add 100RWHP to that for having the 6-speed and you end up with about 1100RWHP.

Unless your turbo maps produce much more flow than mine. I guess anythings possible.
Old 04-23-2010, 11:36 AM
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Also when I had the 6-speed in my car I ended up with sheered teeth on 2nd gear, bent output shaft and destroyed syncro's on a built tranny. I gave up and went TH400. The McCloud Twin Disk never let me down though. I never had an issue with it.

It'll be interesting to see what your results are. Lots of newer parts these days so hopefully it works for you.
Old 04-23-2010, 12:10 PM
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So im going to ask, if you spent 10k on the turbo setup and all that cash on the motor why did you not go with 6 bolt heads?
Old 04-23-2010, 12:24 PM
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look at what happened to tiago, had numerous badass 6 speeds built, killed most of them within a 1/4 mile pass. its fun but eventually the switch to auto is the best bet. and i also agree with the scatter shield idea, look what happened to taner, he broke his foot when his clutch blew up. scary ****.
Old 04-23-2010, 12:45 PM
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Originally Posted by RS_SS69
So im going to ask, if you spent 10k on the turbo setup and all that cash on the motor why did you not go with 6 bolt heads?
I can't speak for the OP but for me I can tell you that my goal for the car is something I can drive on the street on good weather days while running low 9's or high 8's. 1000RWHP through a TH400 and the ability to take it on cruises and get in and out of it without too much trouble. My car will run 8.60's or so on slicks at the track. If I go an faster I'm going to need a much more complex cage in it. The new cage won't be conducive to me getting in and out of it. So I really don't need any more HP than what a 4 bolt per cylinder motor can take. If I was interested in a pure full out race car then I'd go crazy on it.
Old 04-23-2010, 12:53 PM
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Holy God That is Beautiful!!!
Old 04-23-2010, 01:05 PM
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Originally Posted by chasgiv3
I can't speak for the OP but for me I can tell you that my goal for the car is something I can drive on the street on good weather days while running low 9's or high 8's. 1000RWHP through a TH400 and the ability to take it on cruises and get in and out of it without too much trouble. My car will run 8.60's or so on slicks at the track. If I go an faster I'm going to need a much more complex cage in it. The new cage won't be conducive to me getting in and out of it. So I really don't need any more HP than what a 4 bolt per cylinder motor can take. If I was interested in a pure full out race car then I'd go crazy on it.
I get what your saying but with all that cash he spent and getting the LSX 6 bolt block why waste the time on a 4 bolt setup? With your car you have the LQ4 block so your limited to the 4 bolt heads. You would have to go and have your block modified, the point of buying an LSX block and boosting it would be to utilize the 6 bolt heads. They dont cost that much more when you got deep pockets on this level of a build.
Old 04-23-2010, 02:31 PM
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Originally Posted by RS_SS69
I get what your saying but with all that cash he spent and getting the LSX 6 bolt block why waste the time on a 4 bolt setup? With your car you have the LQ4 block so your limited to the 4 bolt heads. You would have to go and have your block modified, the point of buying an LSX block and boosting it would be to utilize the 6 bolt heads. They dont cost that much more when you got deep pockets on this level of a build.
I have to agree with you. You make a good point. 6-bolt block should get 6-bolt heads.
Old 04-23-2010, 02:35 PM
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1million dollars in the setup and its on a stock tranny.... good call! :p
Old 04-23-2010, 02:40 PM
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Originally Posted by TINKRD
1million dollars in the setup and its on a stock tranny.... good call! :p
How many of you think Jeremy's car will see track times? You guys are wasting your breath.

He did not and is not building a drag car, otherwise you would see the obvious. Strictly a badass cruiser that can handle 100% (Yes I said 100%) of the cars he comes across.

Who wouldn't want a 100% streetable 1200rwhp beast? You'd be a liar if you didn't.
Old 04-23-2010, 02:47 PM
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Originally Posted by TINKRD
1million dollars in the setup and its on a stock tranny.... good call! :p
the 6spd should last him for a while, i am sure this is not an all out drag car

it is all in the way you drive, yes if you clutch dump at 5000rpm with slicks on the track it will not last for too long

there is a guy that lives around my area with a 860hp camaro with a completely stock 6spd and so far he has two seasons on it with no breakage
Old 04-23-2010, 02:58 PM
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Yeah it's funny how long parts last when you don't really use them.

Post the dyno video of the 1200RWHP when you get it done. I'd be interested in the boost level needed to get there.
Old 04-23-2010, 03:07 PM
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lmao. jeremy does nothing but highway rolls. and with a stock t56, it wont last long... HEAT is what kills the T56 on long highway runs...

but he's in good hands w/ the shop he's at and i know they'll eventually put a pump on it...
Old 04-23-2010, 03:08 PM
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Originally Posted by Vcious04
How many of you think Jeremy's car will see track times? You guys are wasting your breath.

He did not and is not building a drag car, otherwise you would see the obvious. Strictly a badass cruiser that can handle 100% (Yes I said 100%) of the cars he comes across.

Who wouldn't want a 100% streetable 1200rwhp beast? You'd be a liar if you didn't.
my comment has nothing to do with a track car smart guy...
Old 04-24-2010, 07:48 AM
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The reason I have 4 bolt heads is because I already had the heads. I bought the 235's before they even came out for my N/A motor.
Old 04-24-2010, 08:20 AM
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Originally Posted by jeremym
Being that have 4 bolt TFS heads how much boost can i run before problems? Or how much HP? I just want 1000-1200rwhp. I think that would be around 10-15lbs of boost. To me that is not that much boost. Thanks for any info
Keep the RPM's down and avoid detonation. You should be fine in that power level. It will take more than 15 psi to make 1200 to the wheel though.
Old 04-24-2010, 08:29 AM
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Originally Posted by Vcious04
Strictly a badass cruiser that can handle 100% (Yes I said 100%) of the cars he comes across.

Who wouldn't want a 100% streetable 1200rwhp beast? You'd be a liar if you didn't.
If he wants to stick to those percentages, he better keep it off the streets of West Palm Beach, FL.
Old 04-24-2010, 10:09 AM
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Originally Posted by chasgiv3
Stay very low 20's unless you enjoy replacing head gaskets. 4 bolts per cylinder really limit the LSX motors. You're not going to make 1200RWHP though unless you push it to say 27PSI or so. You can do it. I can do it...but for how long. Then it's ok I'll take another set of head gaskets thank you.
Oddly enough Brian(Fireball) went all season with 4 bolt heads well over 25# of boost, making enough power to trap 175-180mph, which is probably 1600hp. He had no head gasket issues until the ignition starting going haywire. If the ignition problems hadn't come about he wouldn't have had any issues with the headgasket. So there are ways around the problem. Just saying with the correct setup its not a problem to have a street car make that much power and have no head gasket problems.
Old 04-24-2010, 10:11 AM
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Originally Posted by 98Z28CobraKiller
Keep the RPM's down and avoid detonation. You should be fine in that power level. It will take more than 15 psi to make 1200 to the wheel though.
The turbo is going to be the key. We made 1105(+-10)rwhp from 6000-9000 with a 106 and 13# of boost through a powerglide.

Last edited by Phil99vette; 04-24-2010 at 10:19 AM.


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