engine swap - Chevy Impala SS Forum
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post #1 of 20 (permalink) Old 01-12-2006, 09:19 PM
jm91ss
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I have a 91 with the 5.0. It has 247k on it. I want to put a 350 in it this summer when I have time for the swap. What is the range of years i shoould look for? I am pretty sure that i can use a 91 to 93 350, but will i be able to use a newer one? I do want to do some mild mods, (cam headers..etc...). I just think it would be better to start with a the highest output motor i can. Any thoughts are appreciated
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post #2 of 20 (permalink) Old 01-12-2006, 10:26 PM
Thelyricist720
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I think most of your replies would be to save up for the 94-96 body style. Although i haven't tried this, there's many people who have-and with plenty headache. From my understanding it's not a direct drop in. You need to fab some of the body to get it to fit. Most people would reccomend an aftermarket crate engine that just drops in. 94-96 were the years of the 350 LT1 in the b-body. 91-93 were the years of the 350 L05. I too would want to do this, but most people told me i'm better off buying a b-body prefitted with it.
post #3 of 20 (permalink) Old 01-13-2006, 02:43 AM
Daz
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Quote:
Originally posted by jm91ss:
I have a 91 with the 5.0. It has 247k on it. I want to put a 350 in it this summer when I have time for the swap. What is the range of years i shoould look for? I am pretty sure that i can use a 91 to 93 350, but will i be able to use a newer one? I do want to do some mild mods, (cam headers..etc...). I just think it would be better to start with a the highest output motor i can. Any thoughts are appreciated
You can use a block from an 87 and up since it usues the single piece rear seal.With the 87 and up you could use your drivetrain parts and stay with a hydraulic roller cam.The TBI/intake would be the first limiting factor when you change over to a 350.
 
post #4 of 20 (permalink) Old 01-13-2006, 06:24 AM
jm91ss
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Since the engine will not cost me more than $1k, I'm not too worried about the 94-96. The car still runs great, I pretty much just want to be prepared. Thanks so far for replies. I know that the LT1 is not a direct bolt in. That would require body mods, so not going the LT1 route. Just straight 350, with some mild mods...cam, headers, etc...
post #5 of 20 (permalink) Old 01-14-2006, 02:37 AM
LittleNo
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just my two cents:

a TPI engine from 89 - 92 F-Bodies would nearly be a direct bolt-in with aftermarket wiring harness and chip for the ECM its much easier than getting a LT1 running

i have a 89 TPI in my 91 Caprice:
(since 89 uses a MAF sensor, i had to convert to electric fans because of the air duct, 90-92 TPIs are MAP so you could use a K&N filter directly at the throttle body, so you could keep your fan of the caprice)

post #6 of 20 (permalink) Old 01-14-2006, 03:29 AM
Daz
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You actually need a TPI ECM that matches the system(SD or MAF)

LittleNo,

WHich fuel pump did you use
post #7 of 20 (permalink) Old 01-14-2006, 05:56 AM
LittleNo
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sure, 1227165 for MAF, 1227730 for SD (MAP) - but for both you can make your custom chips for the swap and for both a painless wiring harness is available

i use a fuel pump of a 91 TPI camaro - fits exactly into the in-tank unit of the caprice
post #8 of 20 (permalink) Old 01-14-2006, 06:16 AM
Daz
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agreed..You dont need to burn a PROM if your cam/timing curve is within the parameters.With the stock TPI you cant do much anyway.
post #9 of 20 (permalink) Old 01-14-2006, 08:42 AM
jm91ss
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What kind of power does the TPI motor make stock? Would a 'vette motor of the same years work also?
post #10 of 20 (permalink) Old 01-14-2006, 08:50 AM
96capriceMGR
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Do not get hung up on "Vette" parts all it will result in is paying way too much and not getting the performance you want. The Vette is lighter and therefore the cams in pareticular speced for it are not always going to work well in a b-body and were usually the same as the f-body anyway.
To put things in perspective though the very best TPI heads flow 15% LESS than the stock LT1 b-body heads. The lowend torque will be nice though with a TPI.
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