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A few small questions on Lt1 Swap....

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Old Feb 29, 2004 | 04:48 PM
  #1  
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
A few small questions on Lt1 Swap....

Alright I have a few questions on the LT1 swap-

-How will my speedometer hook up with the LT1 tranny?

-How will my tachometer hook up?

-Would it be better to program vats out or get a vats bypass module?

-Is it possible to use and other year Radiator Hoses? Can I use my stock ones? I do have a good enough radiator, was replaced with a 3in thick radiator, its huge.

-Is it better to take emissions all the way out, or keep it? I live in Florida and there are no more emissions. How much would it cost to get rid or it?

-What kind of power am I looking at with an LT1, LT4 Hot Cam (with all springs and lifters needed), 1 5/8 in headers, and mild porting?

-Isn't the Power steering reservoir a belt driven accessory? If so wont it be included in an engine with all belt driven accessories?

I'll post more questions as they come back to me.


Thanks,
Shane
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Old Feb 29, 2004 | 05:56 PM
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From: Angleton, TX
Car: '92 RS
1. If you have an electronic speedo you just hook the VSS up to the PCM, then get the speedo signal from the PCM. If you have a cable speedo you will either have to get an electronic one or get a cable drive VSS for the transmission, neither of which will be cheap.

2. Tach hooks up with a single wire.

3. You can do either. Its easier to program out VATS, but its not that difficult to keep it working.

4. You cannot use the stock hoses. I've heard the '93 Camaro upper and lower hoses work perfect. Your radiator will be fine.

5. You can keep them if you want, but its easy to get rid of it. Leave off the air pump, remove the EGR and have it programmed out.

6. Depends on the port job. Probably about 350-375 hp. Headers will hold you back if you do any more.

7. The resevoir is separate from the pump. You will have to get the resevoir if it doesnt come with the engine. B-Body or Corvette seems to work the best.
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Old Feb 29, 2004 | 06:29 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
Thanks alot.

I think when i do the swap i'll be getting the bypass module becuase on ebay they are $10. Not that much. Then once i've gotten everything programmed out i'll just sell it.

The engine will still function without emisions, correct? It will just have the service engine soon light on, right? Or is emissions actually a working part of the engine and it wont fuction at all without it. I'd hate to have to install emission just to go get it programmed out then come back home to take it all out again without emissions. The engine bay just looks so much cleaner without emissions its not even funny.

And since the reservoir has to be from a different car that'll have to be noted. Does the power steering still hook up the same way?

Uhhh...... damn d00d just looked at PCM tuning and LT1 edit and them things are fn expensive. What kinda money are we talking to get someone todo this stuff? What i need to get done is it be programmed for the LT4 hot cam, vats bypas, and no emissions. Is that really gonna be that much money? I think i need to start asking my mechanic friends if they know someone who will do it for free. That stuff is expensive. TPiS wants $575 and i have to pay for shipping both ways.



Thanks though,
Shane
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Old Mar 5, 2004 | 05:58 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
i've read in so many paces before that elctronic speedo were in 86+ vehicles, but now in the LS1 swap thing is says 87+ is that right?
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Old Mar 5, 2004 | 05:59 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
the mopst rememberable being on tacreationsusa.com


All 89 and earlier Camaros & 85 and earlier Firebirds use a mechanical speedometer drive unit, while all other 3rd gens use an electric speedometer drive unit

I dunno which is right now


source page was http://tacreationsusa.com/automati.htm




Shane
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Old Mar 5, 2004 | 05:59 PM
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From: Chicago, Il
Car: 1987 Trans Am
Engine: Lt1
Transmission: T56
For Firebirds....it's 86 on up.

Sorry for the earlier error.

Last edited by Trans Am#5; Mar 5, 2004 at 06:31 PM.
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Old Mar 5, 2004 | 06:00 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
you sure? how do i change over?
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Old Mar 7, 2004 | 12:24 PM
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From: Augusta Georgia
Car: 89 IROC
Engine: 95 350 LT1
Transmission: 4L60E
what year LT1 are you using? each has it's advantages and problems. I used a 95 roadmaster LT1 and trans, I had the whole car to strip parts from. not including the cost of the roadmaster the whole swap cost me less than $100 but the route I went was labor intensive.
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Old Mar 7, 2004 | 12:26 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
94-95 is what i will be using.




Shane
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Old Mar 7, 2004 | 12:50 PM
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From: Augusta Georgia
Car: 89 IROC
Engine: 95 350 LT1
Transmission: 4L60E
94-95 is a good choice, what will be the donor car? The VSS/speedo drive will be the biggest problem. you can get an electric speedo, a custom tailhousing for the trans, or do what i did- I removed the VSS out of the trans and put the speedo drive gears in it's place, then I reworked the VSS to mount in a different place in the tailhousing.
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Old Mar 7, 2004 | 01:29 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
well i have an 86 a my research has showed that 86 has electric, So i'm good there. What does VSS stand for?

The donor car wil be whatever LT1 from 94-95 i can get, may it be a corvette or F-body i'm gonna do it. I'd prefer a F-body since i wont need new fuel rails and stuff. If i do get a F-bpdy i will be keeping A/C, reason why i threw out the idea of LS1. i'm not gonna notch one of the most important parts of the frame, are you kidding me?

Do the SS and WS6 engines have different power ratings or was it just from the cold air kits they had? I mean different cams or anything. I can get a used low mileage LT1 with everything for $850, in clean condition($650 for a little worse). I think thats a heck of a deal.




Shane
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Old Mar 7, 2004 | 01:29 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
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Old Mar 7, 2004 | 03:20 PM
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From: Augusta Georgia
Car: 89 IROC
Engine: 95 350 LT1
Transmission: 4L60E
notching the frame for the LT1 is really nothing to be concerned about. the area that needs to be modified is way overbuilt anyway. check and see if you have a speedometer cable.
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Old Mar 7, 2004 | 03:55 PM
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From: Chicago, Il
Car: 1987 Trans Am
Engine: Lt1
Transmission: T56
Different fuel rails are not a necessity when using a Vette Lt1. They just make it look a little neater. It is the better engine to use since it drops right in with NO modifications to the subframe or anything else. It fits like it was meant to be in there from the factory.
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Old Mar 7, 2004 | 04:35 PM
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From: Jax, Florida
Car: 1986 Trans Am
Engine: 305 LB9 TPI
Transmission: 700-R4
speedometer cable? what would this look like? would it hook directy up to the speedometer?
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