402 Turbo help
12-11-2010, 11:43 AM
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402 Turbo help Hey guys n gals....I am currently working on a single turbo setup for my 98 402 TA street car. I am using L92 heads(lift) so I am looking for a modest 650-750hp at 10-12lbs boost.
The car was originally a 347 with a T4 ST80. I bought it with no engine or turbo but it did come with custom turbo headers,turbo k member, and the rest of the hot pipes/intercooler. My hope was to select the proper turbo and just use the hot pipes I already have to save money. However.... I have read the T4 flange may be to small for a 402?....but that was on a 1k+ Hp setup at 15lbs + boost.
Will I be ok with T4 on this engine with 650-750 and 10-12# boost?
It seems a gt88 or 91 turbo is the way to go for this displacement?
Anyone know how a gt88 or 91 compares to an st80 in size?
-98 harness repinned to 99pcm
-M6 (yes I know auto is faster in the quarter)
-Forged LS2 402
-CNC L92 heads
-L76intake
-9" rear
I am new to boost fellas and would like to get this right the first time. Thank you very much for any input.
The car was originally a 347 with a T4 ST80. I bought it with no engine or turbo but it did come with custom turbo headers,turbo k member, and the rest of the hot pipes/intercooler. My hope was to select the proper turbo and just use the hot pipes I already have to save money. However.... I have read the T4 flange may be to small for a 402?....but that was on a 1k+ Hp setup at 15lbs + boost.
Will I be ok with T4 on this engine with 650-750 and 10-12# boost?
It seems a gt88 or 91 turbo is the way to go for this displacement?
Anyone know how a gt88 or 91 compares to an st80 in size?
-98 harness repinned to 99pcm
-M6 (yes I know auto is faster in the quarter)
-Forged LS2 402
-CNC L92 heads
-L76intake
-9" rear
I am new to boost fellas and would like to get this right the first time. Thank you very much for any input.
Last edited by Formula42; 12-11-2010 at 11:58 AM.
