3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

TPI to Carb swap

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Old Apr 13, 2004 | 03:41 PM
  #1  
klumb15's Avatar
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TPI to Carb swap

i've read up a bit on this using the search on this forum, and i've learned some things but i still have some questions....my engine is around a 90 vette engine, if I were to swap this over to a carb, would a regualar manifold like the performer RPM fit right in there? i heard they are different angles....would it be easier to just yank out the whole engine(sell it), and do a build up of a older already carbed 350? and one other question, what is a hiquality intake? is a performer RPM a pretty good one? thanks in advance...
Old Apr 13, 2004 | 05:01 PM
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Rice Killer87's Avatar
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i think their are 2 diff. ones...1 for the 86 and older heads and the 87 and newer heads.

and yes,the Performer RPM is a great intake.
Old Apr 13, 2004 | 06:19 PM
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All you have to do is look at the valve covers. If they're centerbolt, get the '87+ style intake. If they're perimeter bolts, get the early model ('86 and older) intake.

I run a Performer RPM on my 355 and am very happy with it. What intake you get depends on how you want the engine to perform. If it's a street car that you plan to rev to around 5500-6000 when racing the Performer RPM is great. For higher revs, use a single-plane intake. For more off-idle torque, use a dual-plane with longer runners like the Performer (or keep the TPI....it's a GREAT torque-maker.)
Old Apr 13, 2004 | 06:38 PM
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so would it be easier to just buy an older 350, beef it up, and than sell the TPI motor, and put in the built 350? or should i just put the new intake and carb on the vette motor, and sell the whole TPI intake, computer, and all the wiring....if i should keep the vette motor, would it be easier to mod it still in the car, or should I just save myself the aggervation and take it out to work on it...this is gonna be a winter project for the 2004/2005 winter...i'm just tryin to plan out what i'm gonna do...
Old Apr 13, 2004 | 06:49 PM
  #5  
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If you intend to change heads and cams and all that, you're better off building an engine and swapping them. If you think you'll be keeping the longblock stock for a while, just convert it to carb and sell me your throttlebody, ECM, and wiring harness.
Old Apr 13, 2004 | 07:13 PM
  #6  
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if that is a 90 vette motor with aluminum heads, you need the 86 and earlier intake*still used the old bolt angles)
Old Apr 13, 2004 | 07:32 PM
  #7  
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i'm still debating...because i eventually wanna get head work done, and a cam too...but we have a performance shop nearby, and he said he can do my heads...but i think i would be better of if i just started from scratch and built an engine the "right way", instead of modifing this one...how much money do you think i could get for this engine..it has low miles, it has centerbolt valve covers meaning its a 87-91....i think i'll just find an older 350, and built it from the ground up, it'll give me something to keep me out of trouble
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