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TRTPerformance and FFHP combo for the win!!!

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Old Jul 3, 2006 | 09:35 PM
  #21  
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Originally Posted by Turbo LS1 SS
sounds like a hefty build. BUT. IMO, u would be better off with smaller cubes. 370 MAX. 76gts is way too small, imo, for a 408. especially a high VE 408. and i think there is no way in hell u will see 17psi with a 76gts in a 408, at least not efficiently. hell, im afraid my 76gts wont be enough for 800 in my 366. remember, dont shoot for a psi goal, shoot for a power goal. an engine is just an airpump.

good luck with the build, it sound pretty mean, but imo ud be better off with smaller cubes for big hp with a rearmount turbo.
werd, i owuld do an 88mm with a 408, at least
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Old Jul 3, 2006 | 09:41 PM
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Originally Posted by Turbo LS1 SS
sounds like a hefty build. BUT. IMO, u would be better off with smaller cubes. 370 MAX. 76gts is way too small, imo, for a 408. especially a high VE 408. and i think there is no way in hell u will see 17psi with a 76gts in a 408, at least not efficiently. hell, im afraid my 76gts wont be enough for 800 in my 366. remember, dont shoot for a psi goal, shoot for a power goal. an engine is just an airpump.

good luck with the build, it sound pretty mean, but imo ud be better off with smaller cubes for big hp with a rearmount turbo.
I hear what you are saying... the challenge that we rearmounters continue to fight it that in a remote mount setup, the temp loss is significant. In some estimates up to 30%... this does two things... increase the backpressure and reduce the overall heat efficiency of the turbo... where you are ******* out your 76GTS, I will just be pushing it to its max (this is the concept I am working on anyways). We will see... there are 402/408 rearmounts with 70 and 72 trim turbos... Are they seeing good HP numbers? Yes... Are their turbos operating at crappy efficiency rates.... Hell yes. So where is the balance of increased cubes making up for the loss of heat and air volume in a rear mount?!? That is the question.
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Old Jul 4, 2006 | 12:20 AM
  #23  
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is it possible to run a twin rearmount on a camaro? im still waiting on Garretts car to be finished, its a twin rear mount on a vette with a 408, i think hes looking for 1000hp
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Old Jul 4, 2006 | 01:05 AM
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twin rear mounts have been done on a TA before. Dont know too much about it though. "Jammer" is the screen name of the owner. I think it has been sold.
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Old Jul 4, 2006 | 06:53 AM
  #25  
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its a fine line between choking the trubo and get to to operate efficently. whatAR optiions do you have with the 76????

Chris.
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Old Jul 4, 2006 | 12:55 PM
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.86 AR is what I will go with...

Just spoke with Jose yesterday (Thanks man!!!) and he gave me some good advice on my turbo. Looks like I will go with the newer 76MPS that DrTurbo was talking about. Jose belives with the setup I am going for and with the piping and engine upgrades I should see close to 1200 at the crank... you do the math.

Cant wait!!!
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Old Jul 5, 2006 | 06:45 AM
  #27  
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MAN! thats sweet! any idea when full boost will be???

1200bhp from a rearmount hehehe

Chris.
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Old Jul 5, 2006 | 09:52 AM
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The turbo can support up to 1200hp max, the whole key and problem like Jose said is getting enough heat to it and keeping it within the piping. He has some equations written down on the boards and it appears that just the difference between 1500EGT and ~1000EGT is over 10 lbs extra of back pressure. So at 10psi that is the difference between a 2:1 setup and a 3:1 setup.....yikes. You really don't see the difference until its done on paper.
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Old Jul 5, 2006 | 01:31 PM
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Originally Posted by DrTurbo
The turbo can support up to 1200hp max, the whole key and problem like Jose said is getting enough heat to it and keeping it within the piping. He has some equations written down on the boards and it appears that just the difference between 1500EGT and ~1000EGT is over 10 lbs extra of back pressure. So at 10psi that is the difference between a 2:1 setup and a 3:1 setup.....yikes. You really don't see the difference until its done on paper.
Yeap... that will be the true challange... I think I will coat the exhaust inside and out... then wrap it with ceramic batting with an aluminum backing then outside that I will wrap with 1/16" thick header wrap all the way back. Great thread on it here: https://ls1tech.com/forums/showthrea...t=wrap+exhaust

Trying to retain as much temp as possible... I may even blanket the turbo.
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Old Jul 8, 2006 | 03:27 PM
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Originally Posted by trtturbo
Jarred, shoot him a p.m. He does not rush at all; very detailed. Does it because he likes doing it, not just trying to make a quick $$.
he did the speed density tune on my car....idles like a champ after i repaired the battery/alt wires!!
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Old Jul 8, 2006 | 05:20 PM
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Sent him a PM already... no reply. He no likey.

Ok so I am going with 317 heads.. 76MPS turbo... man I cant wait to get all this together!!! Gonna be sick!
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