LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

305 TPI to LS1 converstion Question

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Old Aug 5, 2010 | 11:20 AM
  #1  
kramer87gta's Avatar
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From: Sun Prairie, WI
Car: 1987 GTA Vert
Engine: 305
Transmission: Auto
Axle/Gears: ?
305 TPI to LS1 converstion Question

Hey Guys,

I have been doing a ton of research over the last few days, and have not been able to find the exact answer for my question

I have an 87 GTA ASC Convertible that i was just going to freshen up the 305 and be done with it, but i figured by the time i got done with rebuilding the bottom end, adding new heads, cam, intake and gaskets i would be in for pretty much the cost of an LS1, however i am wonderinf if anyone has performed this swap on a digital dash car or knows if this can be done. I have see that most or all have been done on the analog cars.

I am looking at doing a 99-02 LSI +T56 swap.

If anybody can point me in a direction that would be great
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Old Aug 5, 2010 | 01:58 PM
  #2  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I may be wrong about this, and if so, I will accept correction.

But, there shouldn't be any differences vs. analog. You will need to correct the tach output for V8, just like you do for analog, but everything else should work.
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Old Aug 5, 2010 | 05:25 PM
  #3  
Pocket's Avatar
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From: NC
Car: 91 Trans Am
Re: 305 TPI to LS1 converstion Question

Body connectors share the same pinouts as analog cars. Should be nothing out of the ordinary
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