LT1-LT4 Modifications 1993-97 Gen II Small Block V8

LT1-LT4 conversion kit?

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Old 04-09-2008 | 04:56 PM
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Default LT1-LT4 conversion kit?

Doe Gm still make this kit. Also any where else to buy it at besides Gm dealer??? Thanks.
Old 04-09-2008 | 05:16 PM
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You don't want that kit. waste of time and money.

choose a better cam and get your stock heads ported.
Old 04-09-2008 | 05:20 PM
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Originally Posted by infinitebird
You don't want that kit. waste of time and money.

choose a better cam and get your stock heads ported.
Im gonna have to agree
Old 04-09-2008 | 05:26 PM
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GM no longer has the intake available to offer the kit ahyway.

As has been said you do not want it anyway. A decade ago it may have been an OK choice, today it would have to be considered a BIG mistake.

Advanced Induction can port stock heads and offer a matching cam that will make as much RWHP at the LT4 kit can offer flywheels and do so for similar money.

That said there are a lot of mods needed before heads and cam should be considered. Most folks inexperianced enough to think this is a good kit do not have the supporting mods so are not ready anyway.
Old 04-09-2008 | 07:17 PM
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LT4 conversion < Ported Stock heads with a matched cam...and no GM doesn't offer the kit anymore as already said, they no longer make the intakes, only way to get the LT4 junk is the GM LT4 heads, and Edlebrock LT4 Intake with the GM LT4 Hotcam....just spend the money and make more power with ported stockers
Old 04-10-2008 | 03:19 AM
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Ported LT4 > Ported LT1. OR you can buy a real set of heads like the AFR LT4's
Old 04-10-2008 | 08:32 AM
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lloyd elliot...
Old 04-10-2008 | 09:24 AM
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Originally Posted by Pwebbz28
Ported LT4 > Ported LT1. OR you can buy a real set of heads like the AFR LT4's
+1 on the AFR's. I have the old stlyle 190cc's on mine and love em'. You won't regret the extra dollars you spend as they are kinda expensive.
Old 04-10-2008 | 12:35 PM
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A friend of mine stuck the LT4 top end kit on his 94 vette several years ago. I think he ended up with 350ish to the wheels. I tried to talk him in to something a little more stout but he just wanted some more power without the big looping idle and constant shaking.
Old 04-10-2008 | 01:23 PM
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your best bet if you want to make some power with what you got is go with an ai package. you don't need lt4 heads or manifold to go fast. plenty of people on here to prove that.
Old 04-10-2008 | 05:43 PM
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Originally Posted by DAVE00
+1 on the AFR's. I have the old stlyle 190cc's on mine and love em'. You won't regret the extra dollars you spend as they are kinda expensive.
Why woudn't he regret it? Lots of other guys have. Though more seem to convince themselves mediocre results for the investment are great. it is just a tiny minority that have them worked over at substantial extra cost and actually have them work.
Old 04-10-2008 | 06:15 PM
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Originally Posted by scramblerman
Doe Gm still make this kit. Also any where else to buy it at besides Gm dealer??? Thanks.
Dont waste your time
Old 04-10-2008 | 07:57 PM
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There are other setups that will gain alot more for less cost..

With the LT4 stuff you are pretty much paying for a name..
Old 04-12-2008 | 12:21 PM
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thanks for the input guys. It was for my buddy. He has a LT1 vette, maybe 93 not sure. He wants something that will give it more go go but sound stock and has great driveability. I told him for sure to get the trans redone and get a stall. Just wasn't sure about the heads and cam stuff for LT1's. Guess not too much different than the Ls1's. Would the factory optispark work ok with a heads and cam LT1 or should he get rid of that crap and get the stand alone system for the ignition??? If so you all know where I can find that system at??? Thanks.
Old 04-12-2008 | 01:42 PM
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Originally Posted by scramblerman
thanks for the input guys. It was for my buddy. He has a LT1 vette, maybe 93 not sure. He wants something that will give it more go go but sound stock and has great driveability. I told him for sure to get the trans redone and get a stall. Just wasn't sure about the heads and cam stuff for LT1's. Guess not too much different than the Ls1's. Would the factory optispark work ok with a heads and cam LT1 or should he get rid of that crap and get the stand alone system for the ignition??? If so you all know where I can find that system at??? Thanks.

Hes got a V8...not a honda

As long as he doesnt over cam his car etc, he will still have good all around power for a street setup. Just make sure he explains to the place he will be geting the cam and head work done what he is looking for

Just research more
Old 04-12-2008 | 02:41 PM
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Stock opti works fine, maybe consider a MSD cap and rotor kit as a tuneup item.

The "standalone" systems require a functional opti base anyway.
Old 04-12-2008 | 06:50 PM
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eaither way you go, you can make more power out of a lt4.

Like PWEBBZ28 said ported lt4 > ported lt1.

Granted you can make more power with ported stockers as opposed to stock lt4 ones but in the long run if you plan on doing more work then the lt4 stuff would work out better IMO.

Thats why i didnt do anything major to my engine yet, sooo many diff. ways to go!
Old 04-13-2008 | 09:50 AM
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Granted not a lot of guys are doing ported LT4s but I am NOT seeing the spectacular results the bench racers claim there will be.
Old 04-13-2008 | 10:53 AM
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well i still need to buy a k member so might as well buy it with ls1 mounts
Old 08-06-2008 | 10:03 AM
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Default 93 LT1's

Does anyone know what the difference is between a 93 LT1 and 94-97 LT1's?
just wondering cuz they have different 93 lt1 throttle bodies seperate from 94-97 throttlebodies and other things, and the LT4 kit says it's only for 94-97 LT1's. I'm new to 4th gens, because I own 5 3rd gens and know every inch of those.

Current daily driver.
Green 93' Formula 6-speed LT1 Bone stock except 3" custom exaust,
90,000 miles


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