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.

91 Camaro LS1 swap

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Old 02-17-2010, 11:58 PM
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91 Camaro LS1 swap

Hey wuzup peoples,

I am pretty new to this site. Little something about me. My name is Mike and i got a 91 Camaro. I am currently doing a LS1 swap but i got some questions. If you guys can help me out that could be great. I picked up a 99 Z28 complete for cheap =).

O yeah and i been doing alot of reading on this form for the LS1 swap. Helps out alot you guys ROCK!!!

Questions.

1. As anyone done a LS1 smog legal swap?

2. I live in CALIF and i want to do a smog legal swap but dont know how to go about it. Besides using all the smog stuff from the 99 and gas tank and cats, o2 sensor, etc. But has anyone took there smog legal car to the state reff?

3. If so what did they do and what did they ask for?

Any input would help out alot thanks.

-Mike
Old 02-18-2010, 08:11 AM
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Re: 91 Camaro LS1 swap

https://www.thirdgen.org/forums/ltx-...ap-failed.html

Most recent one I remember. Its not cali though
Old 02-18-2010, 08:17 AM
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Re: 91 Camaro LS1 swap

Youre gonna have to install the LS1 dash, most of the wiring, and any other emission related bits and pieces.

The reason for the dash is so you can use the gauge cluster, and keep the EVAP functioning. Do some searching in the swap forum for the EVAP and you'll find info on why it wont work without the cluster etc etc.

Im sure its been done in CA. Ive seen vids of guys on youtube from CA and they obviously were able to get it ref'd.

J.
Old 02-19-2010, 01:27 PM
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Re: 91 Camaro LS1 swap

TPI Terror lives in california, and he's got plates on his and is driving around, you might want to ask him what he did.
Old 02-19-2010, 02:26 PM
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Re: 91 Camaro LS1 swap

Originally Posted by BlueZee28
TPI Terror lives in california, and he's got plates on his and is driving around, you might want to ask him what he did.
I almost forgot that he did do the whole conversion with emissions etc.
Old 02-22-2010, 08:45 AM
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Re: 91 Camaro LS1 swap

Originally Posted by BlueZee28
TPI Terror lives in california, and he's got plates on his and is driving around, you might want to ask him what he did.

Yeah i have seen him around before but havent talk to him about the swap but ill ask him what he did to make it pass.

I just want to do things right the first time and then add in my other parts. Heads, cam, intake manifold, headers, etc...

thanks

-Mike
Old 02-22-2010, 08:46 AM
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Re: 91 Camaro LS1 swap

Originally Posted by ghettocruiser
Youre gonna have to install the LS1 dash, most of the wiring, and any other emission related bits and pieces.

The reason for the dash is so you can use the gauge cluster, and keep the EVAP functioning. Do some searching in the swap forum for the EVAP and you'll find info on why it wont work without the cluster etc etc.

Im sure its been done in CA. Ive seen vids of guys on youtube from CA and they obviously were able to get it ref'd.

J.

Ok i will do that, thanks for the info.

Also can i use after market gauges to make the EVAP work???
Old 02-22-2010, 08:47 AM
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Re: 91 Camaro LS1 swap

Originally Posted by Pocket
https://www.thirdgen.org/forums/ltx-...ap-failed.html

Most recent one I remember. Its not cali though


thx man
Old 06-06-2011, 02:48 PM
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Update

Sorry its been a while and i forgot to post pic of my swap. Here is my swap pictures. Thanks for the help.

Donor car

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Old 06-06-2011, 02:49 PM
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Re: 91 Camaro LS1 swap

cleaned it a lil
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Old 06-06-2011, 02:49 PM
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Re: 91 Camaro LS1 swap

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Old 06-06-2011, 02:50 PM
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Re: 91 Camaro LS1 swap


Clean it up more
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3rd gen time

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Old 06-06-2011, 02:51 PM
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Re: 91 Camaro LS1 swap



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Old 06-06-2011, 02:52 PM
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Re: 91 Camaro LS1 swap

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Old 06-06-2011, 02:52 PM
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Re: 91 Camaro LS1 swap



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Old 06-06-2011, 02:54 PM
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Re: 91 Camaro LS1 swap

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Old 06-06-2011, 02:55 PM
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Re: 91 Camaro LS1 swap

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Cold air

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Old 06-06-2011, 02:56 PM
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Re: 91 Camaro LS1 swap

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Old 06-06-2011, 02:58 PM
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Re: 91 Camaro LS1 swap

Thanks for looking let me know what you think.
Old 06-06-2011, 04:47 PM
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Re: 91 Camaro LS1 swap

Looks good! you should drill the 2" hole under heater box to hide the computer! Otherwise nice job on your swap.
Old 06-06-2011, 09:19 PM
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Re: 91 Camaro LS1 swap

Originally Posted by 90-irocdx3
Looks good! you should drill the 2" hole under heater box to hide the computer! Otherwise nice job on your swap.
Wuzup man i talk to u on caligeneralzcc.com i go by LBC_TBSS07

which hole are you talking about? i been wanting to hind that damn computer for a while already i hate how it looks there haha i just relocated my overflow tank and took off all that egr bs.

And thanks man you have a clean *** swap too
Old 06-06-2011, 11:04 PM
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Re: 91 Camaro LS1 swap

Looks really good bro.
Old 06-06-2011, 11:06 PM
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Re: 91 Camaro LS1 swap

Well i drilled a 2" hole under the heater box from the inside of the car. so my computer is on the inside of the car.
Old 06-08-2011, 03:13 AM
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Re: 91 Camaro LS1 swap

Originally Posted by TPI TERR
Looks really good bro.
Thanks man this is a never ending project and i love it

Originally Posted by 90-irocdx3
Well i drilled a 2" hole under the heater box from the inside of the car. so my computer is on the inside of the car.
o ok i see what your talking about, yeah i should do that pretty soon. Did you mount it where the old PCM went???
Old 03-25-2012, 01:54 PM
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Re: 91 Camaro LS1 swap

So did you get your car past the referee? And how did the cats fit in with your swap
Old 03-25-2012, 02:38 PM
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Re: 91 Camaro LS1 swap

How did u fit the 4th gen gauges in the stock dash?
Old 03-21-2016, 03:45 PM
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Re: 91 Camaro LS1 swap

Originally Posted by LBC_camaro91




Cold air



As of now













Made it look easy, what mounts did you use and what would you say was the hardest part?
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