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Rear Mount Turbo

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Old Jul 15, 2012 | 02:55 PM
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Hey guys, I wanted to ask you a question. My buddy and I are planning on doing a single rear turbo on his stock lq9 with a 4l60 that has a 3200 stall. He found a Master Power Turbo T70 with an .63 A/R online do you think this will be sufficiant enough for his 550-600whp goals? I think the A/R might be a little to small any input would be appreciated. Btw this is just his daily driver he doesn't plan on tracking it just wants a little more power with as little lag as possible
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Old Jul 15, 2012 | 03:59 PM
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I think it will do 500 but will stop around 5k rpm
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Old Jul 15, 2012 | 11:44 PM
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So he should be good with this setup for 500whp but nothing more correct?
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Old Jul 16, 2012 | 03:36 AM
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I think he meant the exhaust side is really small, and will choke.
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Old Jul 17, 2012 | 03:57 PM
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the .61 is a tade tiny. from what all the guys runnning rear mounts with "street" orientated cars, T70-T76 with .81 ars on 346 is pretty decent.
the .63 will spool really good, but will hurt top end. got to remember, you got a V8 not a IL4. It want to breathe. ALOT lol
if he want a decent street car, T70 with .81 would be a hell of a ride. especially with a 3200 stall. theres another guy on here thats running a T76 with .86 and he said it run great!
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Old Jul 18, 2012 | 05:01 AM
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Thanks for the information I let him know. Now time to find a 76mm Turbo with a .81 AR. Any suggestions on what turbo to go with?
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Old Jul 18, 2012 | 01:02 PM
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no problem, im doing the same thing actually as you. ive been researching and asking questinos for my own custom rear mounted turbo. Im on my stock LS1 so im keeping my boost under 10 with a good tune. im aimming for 550ish so i dont destory my 10 bolt or trans too much lol
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