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TPI............. what blocks does it fit?

Discussion in 'The Garage' started by uglychevyZZ4, Apr 20, 2004.

  1. uglychevyZZ4

    uglychevyZZ4 3/4 ton status

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    does TPI fit the older non TBI blocks since it was around in late 84? or was that the beginning of the new blocks? I am not sure if i should buy a complete TPI engine or just the tpi stuff..
     
  2. 55Willy

    55Willy 3/4 ton status

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    Engines the same.. it's the heads that are different.
     
  3. HarryH3

    HarryH3 1 ton status Author

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    It will fit any small block that doesn't have Vortec heads. You can buy a special manifold base that will make it fit Vortec heads, but the base costs BIG bucks. /forums/images/graemlins/frown.gif You have to do some machine work on the stock intake to make it fit pre-EFI heads. The angle on the 4 inner bolts is different between carb heads (used up until '86) and EFI heads ('87-'94 (or was it '95?), then the Vortec heads came out.

    If you want to run it on a 350, be sure to get a TPI from a 350. The 305's have smaller injectors and a new set of injectors can run ya $200-400. /forums/images/graemlins/yikes.gif
     
  4. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    If you find an 88-92 TPI setup you'll have to have a machine shop modify the 4 middle bolt holes in the manifold.
    I found an '88 tpi setup, and got ahold of an '86 manifold so it will fit my pre '87 heads. /forums/images/graemlins/thumb.gif
     
  5. Hossbaby50

    Hossbaby50 3/4 ton status

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    Yep to get TPI to fit pre 87 motors you have to bore out those 4 bolt holes or find a TPI manifold from an 85 or 86 year motor. I bored out the 4 holes to make mine fit. It is a PITA and if I had to do it over I would take it down to the machine shop and have them do it. It shouldn't cost that much.

    Harley
     
  6. Cmoe

    Cmoe 1/2 ton status

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    Hossbaby50
    How's your running now that you've had it in for a while...
     
  7. Hossbaby50

    Hossbaby50 3/4 ton status

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    It has been running good for the most part. The only problem I have been having is it keeps killing ignition parts. A month ago I toasted a pickup coil, then a week after that a module. Yesterday I toasted something too. Haven't had time to figure it out yet though. /forums/images/graemlins/dunno.gif Once the ignition thing is ok it will be great. I am going to rip into it this afternoon.

    Harley
     

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