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Old Apr 5, 2005 | 10:13 AM
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Default Turbo headers

Ive seen a few kits in my time. Do log manifolds work as well or better then a tubular header? Ive seen them both ways and ive also seen them mismatches.

What is the possible issues or hp levels that one can achieve with say a 76mm, log manifold on drivers side and a tubular one one the other using 2.5" crossover tubing to a 4" DP?

Mike
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Old Apr 5, 2005 | 10:39 AM
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log manifolds are far less efficient then tubular manifolds.
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Old Apr 5, 2005 | 11:08 AM
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Originally Posted by Armageddon
log manifolds are far less efficient then tubular manifolds.
What kind of HP can one suspect out of a log/tubular setup on a Lt1 car with a small frame 88?

Mike
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Old Apr 5, 2005 | 11:33 AM
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too many variables... it's not about power anyway, it's about efficiency, thats the key to making power period...
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Old Apr 5, 2005 | 11:33 AM
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I would depend on the log I think. If it was something like TTi's street kit with an 88 on an LT1...I dunno...you'd probably hit problems (holding boost, cracking, etc.) before 650rw...and I think that's being gracious. It'll probably be way less than that.
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Old Apr 5, 2005 | 11:38 AM
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Originally Posted by V6 Bird
Ive seen a few kits in my time. Do log manifolds work as well or better then a tubular header? Ive seen them both ways and ive also seen them mismatches.

What is the possible issues or hp levels that one can achieve with say a 76mm, log manifold on drivers side and a tubular one one the other using 2.5" crossover tubing to a 4" DP?

Mike
You should do an STS kit
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Old Apr 5, 2005 | 11:43 AM
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Originally Posted by RyanJ
I would depend on the log I think. If it was something like TTi's street kit with an 88 on an LT1...I dunno...you'd probably hit problems (holding boost, cracking, etc.) before 650rw...and I think that's being gracious. It'll probably be way less than that.
some guy here once put an 88mm on a similar kit, made around 700rwhp, but started to warp his heads (wether or not the to were related dunno?)
but after he sold it the car was pretty much crap because of the massive back pressure issues.
the logs can support about 500rwhp but after that its iffy, sure you can push it some more but it aint good.
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Old Apr 5, 2005 | 11:48 AM
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Well there ya go. Think about it, Harlan with his iron manifolds pushed like 15psi on good gas on a stock motor. Then with the headers he had, 25+psi on a 346. TTech (street) and Q.M.P. kits could never get anywhere close to that. The lact of efficiency kills power potential thanks to backpressure and way too much heat. Then comes the boost issues (MM?, Kaos?), and detonation. Sure...you can get them to work (Rob did), but why mess with it?
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Old Apr 5, 2005 | 04:12 PM
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Originally Posted by RealQuick
You should do an STS kit
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Old Apr 5, 2005 | 04:15 PM
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Originally Posted by smokinHawk
some guy here once put an 88mm on a similar kit, made around 700rwhp, but started to warp his heads (wether or not the to were related dunno?)
but after he sold it the car was pretty much crap because of the massive back pressure issues.
the logs can support about 500rwhp but after that its iffy, sure you can push it some more but it aint good.
the kit in question is a Turbo People kit and has supposedly made 900rwhp on similarily modded LT1's that a friend of mine has. Im just seeing if its really justifiable to make that kind of power. One side is tubular and the other side is a log style where the tubular pass side crossover tube meets up with the log before going into the turbo. Im just trying to figure out why the kit doesnt have 2 tubular manifolds. Thats all.

Turbo People are reputable in Jersey and the FFW cars. Especially Big Daddy's DR car.
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Old Apr 5, 2005 | 04:16 PM
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you have pulses that dont match which cause cracking.
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Old Apr 5, 2005 | 11:22 PM
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Originally Posted by RealQuick
You should do an STS kit
Yes... He should, but he won't EVER do better than 2.0, 60' times...
Didn't you know .
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Old Apr 6, 2005 | 07:36 AM
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You'd never catch a rear mounted setup on anything i own. I see yall like to bag just like I do. Is there anything that you can back your mouthes up with? I know my car is driving right now. Better then ever!

Back to the topic at hand.....
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Old Apr 6, 2005 | 11:13 AM
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Originally Posted by Wildman
Yes... He should, but he won't EVER do better than 2.0, 60' times...
Didn't you know .
Thats why i said. V6 Bird always bashes STS, so I'd figure I'd toss that out for laughs.
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Old Apr 6, 2005 | 01:00 PM
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Originally Posted by RealQuick
Thats why i said. V6 Bird always bashes STS, so I'd figure I'd toss that out for laughs.
Seems im not the only one! Looks like Phamspeed is fixing to put them out of the LS1 community with their budget setup. Congrats on that if it happens.

Mike
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Old Apr 6, 2005 | 03:09 PM
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Originally Posted by V6 Bird
You'd never catch a rear mounted setup on anything i own. I see yall like to bag just like I do. Is there anything that you can back your mouthes up with? I know my car is driving right now. Better then ever!

Back to the topic at hand.....
Ouch!!! Touche'

Yeah my car is STILL under the knife. Ran out of money and having family issues. But there are a couple of STS GTO's that are quite impressive and have really great numbers.

Just giving you shizzle.
Isn't that Phamspeed kit great?!?!? Only if they were going to get it CARB certified. I would definately re-think my options. No... maybe not.. I don't want to be without my car for another year.

Sorry for hijacking your thread.
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Old Apr 6, 2005 | 03:29 PM
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I'm not following you...? Down for a year?

Originally Posted by Wildman
Ouch!!! Touche'

Yeah my car is STILL under the knife. Ran out of money and having family issues. But there are a couple of STS GTO's that are quite impressive and have really great numbers.

Just giving you shizzle.
Isn't that Phamspeed kit great?!?!? Only if they were going to get it CARB certified. I would definately re-think my options. No... maybe not.. I don't want to be without my car for another year.

Sorry for hijacking your thread.
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Old Apr 6, 2005 | 03:32 PM
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I don't want to hijack V6 thread anymore. Tell you what, I will PM you my story if you PM me yours.
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Old Apr 6, 2005 | 04:49 PM
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you first...
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