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Are the gt 45 turbos to big for a v8

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Old 01-21-2014, 01:29 AM
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Default Are the gt 45 turbos to big for a v8

I have a stock motor with 243 heads. I have a turbo 400 with a 3800 stall going in an fbody. I planning on doing a twin turbo set up. Here are the specs of the turbos
Compressor Size: Inlet = 4 3/16", Inducer = 68.7MM, Exducer = 97.8 MM, Trim = 69,A/R = 0.66, Intake (ID / OD) = 2.25" / 3.25"

Turbine: Outlet = 4", Turbo flange = T4, Downpipe flange = 3.5" V-band, Inducer = 87.4 MM, Exducer = 77 MM,Trim = 92, A/R = 1.05

What am I look at for spool times. I'm new to this and would like some helpful info. Thanks in advance
Old 01-21-2014, 01:50 AM
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i think dual gt45's would be too much. a single would do well
Old 01-21-2014, 01:52 AM
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I'm curious. Why do you say that?
Old 01-21-2014, 01:59 AM
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i would think it would be quite laggy. most twin turbo kits ive seen use smaller twins to avoid the boost lag.
Old 01-21-2014, 04:38 AM
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Single would work. 1.05 A/R twins with a 77mm turbine on a stock motor would spool up terrible. Those Ebay GT45's have good size turbines too. Guys are making 600-700whp with a single. You would probably be better off with twin ebay GT35's if you are going with the ebay turbo. I believe they have a similar success rate to the GT45.

Jay
Old 01-21-2014, 05:35 AM
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Twins are good for 1300+whp. More than enough to send that stock engine to hell. Kinda seems rediculous to use them as twins on a stock motor.
Old 01-21-2014, 05:48 PM
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It'll take you forever to spool those. One will get you 600 easily. Alot of better choices out there for a twin turbo setup .



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