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ls1 in lt1 trans am 94

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Old Mar 23, 2006 | 06:09 PM
  #1  
TransAm2k4's Avatar
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ls1 in lt1 trans am 94

is this possible? What would i need.
Old Mar 24, 2006 | 09:18 PM
  #2  
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Re: ls1 in lt1 trans am 94

Anything is possible. What you need is a diffenent story. It might be easier to just sell the Lt and get and Ls. Kinda like an A4 to M6 swap, most think its easier to just sell the A4 and purchase an M6.
Old Mar 24, 2006 | 09:37 PM
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Re: ls1 in lt1 trans am 94

yeah but as im informed there are no emissions in il for pre OBD2 vehicles as of feb 07 so i could see putting a new ls1 in a older car. and all you should need is a k member and ecu right?? not sure but thing to think about i try not to make any drastic decisions till you find out what you really want. also the lt1 is very underrated so recheck your thoughts.
Old Mar 24, 2006 | 10:34 PM
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Re: ls1 in lt1 trans am 94

How do you figure the lt1 is underrated?
Old Mar 24, 2006 | 10:50 PM
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Re: ls1 in lt1 trans am 94

Originally Posted by firebird84
...also the lt1 is very underrated so recheck your thoughts.
I also don't understand this statment.

Also where did you hear that no emissions for IL after Feb. of 2007?
Old Mar 25, 2006 | 12:02 PM
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Re: ls1 in lt1 trans am 94

Yes I would also like to know about this no emissions for OBD1 in Illinois after 07'. Im in Florida now, and there is no emissions down here, I am worried about what im going to have to do with the car when I come back home to IL.
Old Mar 25, 2006 | 12:12 PM
  #7  
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Re: ls1 in lt1 trans am 94

The LT1 is under rated, but only slightly. Not even close to the sneaky power of the LS1.

And yes, it is very possible to swap in a LS1... In fact, it's been done a million times now.
Old Mar 25, 2006 | 12:54 PM
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Re: ls1 in lt1 trans am 94

Originally Posted by Firehawk_Dude
I also don't understand this statment.

Also where did you hear that no emissions for IL after Feb. of 2007?
not no emissions but for everything but for pre obd2 cars pretty much 95 and earlier. and what i meant by that statment is that alot of people worship the ls1 and dont give the lt1s a chance. thats all.
Old Mar 25, 2006 | 01:57 PM
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Re: ls1 in lt1 trans am 94

Originally Posted by firebird84
not no emissions but for everything but for pre obd2 cars pretty much 95 and earlier. and what i meant by that statment is that alot of people worship the ls1 and dont give the lt1s a chance. thats all.
http://www.epa.gov/docs/fedrgstr/EPA.../pr-23536.html

If you read the document, it shows that by 2007 Illinois is required to meet the clean air standard (it is a Federal requirement, Illinois has no choice in the matter, they cannot end testing in 2007), they have to have OBDII testing for post '95 vehicles IN ADDITION TO roller testing for these vehicles:

Vehicle Coverage 40 CFR 51.356

The performance standard for enhanced I/M programs assumes coverage
of all 1968 and newer model year light duty vehicles and light duty
trucks up to 8,500 pounds gross vehicle weight rating (GVWR), and
includes vehicles operating on all fuel types. Other levels of coverage
may be approved if the necessary emission reductions are achieved.

blah, blah, blah.

It also states that if the pollutants are not below a certain level, Illinois cannot use the 2 year testing cycle, it will go to 1 year (every year after a vehicle is 2 years old). It further states that as population goes up in other areas of the State, testing will be implimented there as well, 200,000 people in a geographical area seems to be the trigger.

This is from the EPA, it applies to all other States as well. Emission testing will come to your area, even if you are currently exempt from it if your population gets high enough.
Old Mar 25, 2006 | 01:58 PM
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Re: ls1 in lt1 trans am 94

Originally Posted by kick Z tail out
The LT1 is under rated, but only slightly. Not even close to the sneaky power of the LS1.

And yes, it is very possible to swap in a LS1... In fact, it's been done a million times now.
I thought there were cowl clearence issues. In fact I thought that was the reason for the new front clip in 98. But Im not sure.
Old Mar 25, 2006 | 02:12 PM
  #11  
kick Z tail out's Avatar
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Re: ls1 in lt1 trans am 94

Originally Posted by 2000slp2768
I thought there were cowl clearence issues. In fact I thought that was the reason for the new front clip in 98. But Im not sure.
I had heard that too, and I always believed it. In fact, I was pretty damn sure that was the entire reason for the redesign by GM; to accomodate the new powerplant.

But then, some people did the motor swap, without swapping front ends, or even hoods.
Old Mar 25, 2006 | 02:19 PM
  #12  
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Re: ls1 in lt1 trans am 94

Originally Posted by firebird84
not no emissions but for everything but for pre obd2 cars pretty much 95 and earlier. and what i meant by that statment is that alot of people worship the ls1 and dont give the lt1s a chance. thats all.
Ohh...I thought you meant underrated as in hp/tq. numbers. There will always be people split between LTx and LSx. The LTx is alot cheaper to mod, but the LSx has a great advantage stock for stock. Personally I like them both but with my budget its LT1 all the way. All depends on what your looking for and what your willing to invest.
Old Mar 25, 2006 | 02:21 PM
  #13  
kick Z tail out's Avatar
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Re: ls1 in lt1 trans am 94

Originally Posted by LqMth
Ohh...I thought you meant underrated as in hp/tq. numbers. There will always be people split between LTx and LSx. The LTx is alot cheaper to mod, but the LSx has a great advantage stock for stock. Personally I like them both but with my budget its LT1 all the way. All depends on what your looking for and what your willing to invest.
For me, it's more the look of the LS1 I'm not too fond of. No offense to the LS1 guys. But your cars look like Sebrings.

Yeah, lets not get into that again though.
Old Mar 25, 2006 | 02:49 PM
  #14  
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From: Wichita, KS
Re: ls1 in lt1 trans am 94

Originally Posted by 2000slp2768
I thought there were cowl clearence issues. In fact I thought that was the reason for the new front clip in 98. But Im not sure.
My roomate put a H/C LS1 into a 97 ss. It fits fine, but you can't use the ls1 airbox assembly because the hood line is too low. But, FYI, A LT1 (yes LT1) intake elbow fits a stock LS1 throttle body. So his LS1 breathes through the same 1LE elbow/K&N CAI combo that my LT1 breathes through
And yes, the K-member and wiring harness have to be swaped from a donor car. Also, you might as well buy aftermarket fuel rails to work with the LT1s return-style fuel system, or else get the entire fuel system (tank, lines, etc...) from the donor car also. The car still has a few bugs to work out (like the tach won't read correctly) but its been running and driving it around since last august. Its funny to see peoples faces when he opens the hood
Old Mar 27, 2006 | 03:54 PM
  #15  
TransAm2k4's Avatar
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Re: ls1 in lt1 trans am 94

i think i blew my engine and was thinking of the possibilities since i had to change everything again but if it is really blown i will get a VRE 383 competition block and send my AFR to Elliot to port into le3 or better bigger cam and well pray for something like 430-450 rwhp and maybe 150 shot later on which would put mein the 580-600 rwhp. I don't need much more than that (for now)
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