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.

TPI or Carb car?

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Old Oct 28, 2014 | 10:17 PM
  #1  
83Z28/L69's Avatar
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From: Murphy, NC
Car: 83 Z28/L69
Engine: L69 305H.O.
Transmission: 6spd T56
Axle/Gears: 4.10 LS 4th Gen
TPI or Carb car?

I haven't really posted about my 83, but it was sitting in my yard and was hit in the rear and totaled. Well I got 3800.00 and then 400.00 to get the car back. Well anyway, I'm looking for a new car. I want to eventually go LSX/T56. I've found 2 cars, one TPI/auto and the other LG4/auto. Both cars are the same in condition, price and option, except one is TPI and the other is carb.

Which would be a better start to a an LSX swap?
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Old Oct 28, 2014 | 10:42 PM
  #2  
John in RI's Avatar
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From: RI
Car: 1984 Camaro Berlinetta
Engine: LT1
Transmission: T56 6-speed
Axle/Gears: 4.11 LS1 Rear End
Re: TPI or Carb car?

I've got an 84 that was originally carb and swapped in a LT1. Because it was an early carb car it didn't have wiring for many things FI engines use..... such as Fuses/Relays for fuel pump, injectors, water Pump, cooling fans and so on. Later cars might have more 'wiring' available for some of these things. ( I built a custom under-hood fuse/relay center to overcome this. )

Also worth mentioning; Carb car fuel lines run to the pass side,..... FI car fuel lines run up the drivers side. ( I swapped the stock carb fuel lines to stock FI lines when the in-tank fuel-pump got installed. )


P.S. Sorry to her 'bout your 83 !!



Last edited by John in RI; Oct 28, 2014 at 10:43 PM. Reason: Edit P.S.
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Old Oct 29, 2014 | 12:17 PM
  #3  
83Z28/L69's Avatar
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From: Murphy, NC
Car: 83 Z28/L69
Engine: L69 305H.O.
Transmission: 6spd T56
Axle/Gears: 4.10 LS 4th Gen
Re: TPI or Carb car?

Originally Posted by John in RI
I've got an 84 that was originally carb and swapped in a LT1. Because it was an early carb car it didn't have wiring for many things FI engines use..... such as Fuses/Relays for fuel pump, injectors, water Pump, cooling fans and so on. Later cars might have more 'wiring' available for some of these things. ( I built a custom under-hood fuse/relay center to overcome this. )

Also worth mentioning; Carb car fuel lines run to the pass side,..... FI car fuel lines run up the drivers side. ( I swapped the stock carb fuel lines to stock FI lines when the in-tank fuel-pump got installed. )


P.S. Sorry to her 'bout your 83 !!


Thanks. I read a post from Pocket about the fuse/relays that had to be added to the harness, but Pocket said it's no big deal.

My plan it to drive whatever car I buy for awhile before I go LSX. If I go with the LG4 car, I'm going to swap the 334 L69/T56 from my 83 into it. If I buy the TPI I just going to swap in the T56 and just do the suspension with all the parts I have for my 83.

John, Thanks for the condolences on the 83. It's upset me pretty bad.
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Old Oct 29, 2014 | 12:48 PM
  #4  
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Car: 91 Trans Am
Re: TPI or Carb car?

From a conversion perspective, the TPI car is preferred because it has amble wiring/fuses in place already and an EFI fuel sender

Carb cars require a stand alone harness with their own fuseblock and the fuel sender can be modified or replaced with a newer version, so no big deal. I wouldnt give a second thought to fuel line type or location. I dump all the hardlines on my conversions for 100% braided rail to tank. For those that dont swap, the fuel rail can be flipped 180* on nearly all LSx intakes, so dr/pass fuel is a non-issue

It comes down to which is a nicer car?
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Old Oct 29, 2014 | 02:06 PM
  #5  
83Z28/L69's Avatar
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From: Murphy, NC
Car: 83 Z28/L69
Engine: L69 305H.O.
Transmission: 6spd T56
Axle/Gears: 4.10 LS 4th Gen
Re: TPI or Carb car?

Originally Posted by Pocket
From a conversion perspective, the TPI car is preferred because it has amble wiring/fuses in place already and an EFI fuel sender

Carb cars require a stand alone harness with their own fuseblock and the fuel sender can be modified or replaced with a newer version, so no big deal. I wouldnt give a second thought to fuel line type or location. I dump all the hardlines on my conversions for 100% braided rail to tank. For those that dont swap, the fuel rail can be flipped 180* on nearly all LSx intakes, so dr/pass fuel is a non-issue

It comes down to which is a nicer car?
I was hoping you would chime in. I'll be buying a harness from you, so your advice is much appreciated before hand.The newest of these cars is 24 years old, I was planning on redoing the fuel lines anyway.

Both cars are in the same condition. Both have super clean interiors,but both cars have smalls cracks in the dash, but I have a mint one in my 83, both cars have weak paint on the hood and top, both could use weather stripping, I hate the wheels on both, I can get either car for the same money. It just boils down to ease of future mods. This is just a toy, I have daily drivers, but I learned with my 83, its cheaper and easier to buy a better car up front.
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Old Oct 30, 2014 | 08:09 AM
  #6  
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From: NC
Car: 91 Trans Am
Re: TPI or Carb car?

All things equal, Id go with the TPI car. The carb engine is worth scrap metal where the TPI is worth a few bucks. Hopefully its a 90-92 camaro for the electric speedometer and SD harness. Helps in the long run with either more money for mods or more left over at the end
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Old Oct 31, 2014 | 09:56 AM
  #7  
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From: In the Garage
Car: Camaro
Engine: 6.2L
Transmission: T56
Re: TPI or Carb car?

Originally Posted by Pocket
It comes down to which is a nicer car?
x2
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