C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

LS1 IN A C4

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Old Jan 20, 2002 | 02:10 AM
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Default LS1 IN A C4

Well I was thinking of taking on the job of droping in a LS1 in my 95 anybody try or do this?????? TIA
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Old Jan 20, 2002 | 04:29 AM
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Default Re: LS1 IN A C4 (vettewrench)

TracerX on the forum dropped a LS1 into a 84. It wasn't easy and I'm not sure if they ever completed the job. Last I heard it was running and had been driven, but not sure if he had any probelms that cropped up with it.

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Old Jan 20, 2002 | 06:38 AM
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Default Re: LS1 IN A C4 (vettewrench)

When I went to U&W Corvette Parts in Hannover, Germany, to have my new brakes installed, I saw a 71 coupe that was just getting a LT4 engine transplanted. The guys there told me of another 71 convertible that they where equipping with a LS1 engine. Their webside is
http://www.corvette24.de/

I think, they have an e-mail link posted there.

BTW: I´ve heard you´ve done something nice to the centre console of your late C4. I hate the plastic look of the original! Can you post a pic?
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Old Jan 20, 2002 | 11:10 AM
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Default Re: LS1 IN A C4 (BrightAquaLT1)

BTW: I´ve heard you´ve done something nice to the centre console of your late C4. I hate the plastic look of the original! Can you post a pic?
[/QUOTE]

Thanks for the info here is a pic



[Modified by vettewrench, 9:13 AM 1/20/2002]
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Old Jan 20, 2002 | 11:11 AM
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Default Re: LS1 IN A C4 (vettewrench)

There is someone running around PA with an '88 with an LS1. Never got a chance to mee th guy at the track, but the buzz was that he had LS1 under the hood.
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Old Jan 20, 2002 | 12:00 PM
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Default Re: LS1 IN A C4 (Mr Mojo)

There is someone running around PA with an '88 with an LS1. Never got a chance to mee th guy at the track, but the buzz was that he had LS1 under the hood.
I've seen this car. It looks like a factory job.
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Old Jan 20, 2002 | 01:13 PM
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Default Re: LS1 IN A C4 (vettewrench)

Well I was thinking of taking on the job of droping in a LS1 in my 95 anybody try or do this?????? TIA
IMHO, I'm sure it's possible, but not worth it. If you have a look at some recent Vette magazines, the editor is installing an LS1 into a Shark. They are having issues with motor mounts, oil pans, etc. The Shark is easy compared to your 95 because it doesn't have any integrated transmission/engine/ABS control. It will be very difficult to install an LS1 and pass IM240 emissions (I see you live in Naperville, so it can be a very large issue). The 95 has a Power Train Control Module (PCM) that need the optispark to function. To make the LS1's ignition system work in a 95, you'll have to make an optispark simulator.... If you don't have the optispark, then you'll need to program the LS1 PCM to emulate an 96 LT1 when the emisson tester person hooks the scan tool to you link and scans for codes.

All in all, I'll bet it's much cheaper and easier to hot rod your LT1. A set of AFR heads, a new cam and some long tube headers should get you in the 330-350 RWHP range, that'll beat a stock LS1 with ease. You get to keep the PCM, so no hidden nightmares at the wonderful State of Ill emissions test station.

Just MHO,
Eric
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Old Jan 20, 2002 | 04:29 PM
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Default Re: LS1 IN A C4 (silver & red CE)

It will be very difficult to install an LS1 and pass IM240 emissions (I see you live in Naperville, so it can be a very large issue).
Um, the factory LS1 motors pass IM240 just fine. As long as the emissions stuff is installed there should be no problems.

The 95 has a Power Train Control Module (PCM) that need the optispark to function. To make the LS1's ignition system work in a 95, you'll have to make an optispark simulator....
Why would you think of retaining the LT1 PCM stuff??? An LS1 requires an LS1 PCM to run. The CCM would be the bigger problem. Dunno how you would retain its functionality.

If you don't have the optispark, then you'll need to program the LS1 PCM to emulate an 96 LT1 when the emisson tester person hooks the scan tool to you link and scans for codes.
Brian's car is a 95, so its OBDI and is not required to be scanned. They dont do visual inspections, so they wouldnt know a LS1 is under the hood.


All in all, I'll bet it's much cheaper and easier to hot rod your LT1. A set of AFR heads, a new cam and some long tube headers should get you in the 330-350 RWHP range, that'll beat a stock LS1 with ease. You get to keep the PCM, so no hidden nightmares at the wonderful State of Ill emissions test station.
Agreed. A 383 motor with a supercharger would be much easier and be able to run away from those HEAD&CAM LS1 cars.

Jimmy
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Old Jan 20, 2002 | 04:38 PM
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Default Re: LS1 IN A C4 (Jimmy69)

Why would you think of retaining the LT1 PCM stuff??? An LS1 requires an LS1 PCM to run. The CCM would be the bigger problem. Dunno how you would retain its functionality.
I can't imagine how you'd get the ABS/TC to work on a 95 with an LS1 PCM. I guess you could just dump it (ABS/TC). Might have a big battle with SES codes.

Brian's car is a 95, so its OBDI and is not required to be scanned. They dont do visual inspections, so they wouldnt know a LS1 is under the hood.
I agree they don't look under the hood (in Chicago), but I thought they pulled OBD1 codes too. My mistake.

Agreed. A 383 motor with a supercharger would be much easier and be able to run away from those HEAD&CAM LS1 cars.
Well, at least we agree on this point :cheers:


[Modified by silver & red CE, 2:39 PM 1/20/2002]
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Old Jan 20, 2002 | 07:19 PM
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Default Re: LS1 IN A C4 (vettewrench)

since the 95 runs..

Why not get the LS1 and drop in your C3.. (74 right)???

just my $.02
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Old Jan 20, 2002 | 09:26 PM
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Default Re: LS1 IN A C4 (silver & red CE)

I can't imagine how you'd get the ABS/TC to work on a 95 with an LS1 PCM. I guess you could just dump it (ABS/TC). Might have a big battle with SES codes.
you are gonna loose ABS. the torque converter can be controlled just find by the ls1 pcm. either way, the transmission is gonna have to be out of an f-body since the vettes use transaxles. id get the t56 from the fbody. but then there is the issue of the transmissions need crossmembers, and c4s dont use crossmembers to hold up the rear of the transmission. its a chore, but doable.
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Old Jan 20, 2002 | 11:42 PM
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Default Re: LS1 IN A C4 (88L98)

I used the motor and trans out of a 98 camaro. I started by making a bracket to mount the rear of trans to factory torque arm, made motor mount adapters, and a few other odds and ends. I am very happy with how the car turned out.

Trace
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Old Jan 21, 2002 | 12:50 AM
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Default Re: LS1 IN A C4 (TracerX)

Well, I guess I won't drop you a line about this thread, Trace. :)

Anyway, Motor mounts are EASY!!!! There are a lot of other things that will be a lot more difficult. :yesnod:

BTW, Traces car is up and running. I saw it the other day! It looks very nice...except for the master cylinder... :p: :p: :p:
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Old Jan 21, 2002 | 02:04 AM
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Default Re: LS1 IN A C4 (Chris@SpeedDemon)

i have heard of traces car.........amazing.....the will and desire of some people....hehe
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Old Jan 21, 2002 | 02:53 AM
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Default Re: LS1 IN A C4 (XtremeVette)

And trace has about the best looking hood I have ever seen on any C4 - it's a sweet car for sure!

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Old Jan 21, 2002 | 01:29 PM
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Default Re: LS1 IN A C4 (ChrisB)

Thanks for all the posts and info guys im just getting ideas and it will not go for emmisions so that wont matter even if it didn't pass no biggie.

jeff I was thinking of the LS1 im my 73 too will see what happens!!!

Thanks, Brian
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Old Jan 21, 2002 | 10:23 PM
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Default Re: LS1 IN A C4 (ChrisB)

And trace has about the best looking hood I have ever seen on any C4 - it's a sweet car for sure!
Thanks Dr Bennight
Hey Speed Demon, I thought you liked my master cylinder mod ;)
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Old Jan 23, 2002 | 07:22 PM
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Default Re: LS1 IN A C4 (TracerX)

I used the motor and trans out of a 98 camaro. I started by making a bracket to mount the rear of trans to factory torque arm, made motor mount adapters, and a few other odds and ends. I am very happy with how the car turned out.

Trace
Trace,

You need to put up a website that details this conversion. It's quite an impressive accomplishment and it seems you are becoming somewhat of a legend!

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Old Jan 24, 2002 | 02:05 AM
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Default Re: LS1 IN A C4 (Eric Fischer)


Trace,

You need to put up a website that details this conversion. It's quite an impressive accomplishment and it seems you are becoming somewhat of a legend!
I keep telling my Brother in law and friends of what a legend I was before my football injury :lol:

I am putting together some info and hope to have a website up very soon.

Thanks for the compliment.
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Old Jan 24, 2002 | 08:58 AM
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Default Re: LS1 IN A C4 (silver & red CE)

Do you know if they do a visual for the cat? Thanks guys, Sean :D
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