conversion from LT1 to LT4
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Staging Lane
Joined: Aug 2005
Posts: 60
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From: new orleans
conversion from LT1 to LT4 i am starting some research on what needs to be done to convert a LT1 engine to a LT4 and was wondering what everybody knew about it. I need to know what parts to change and where are some good places online to get them from as far a prices go.. thanks guys
Thread Starter
Staging Lane
Joined: Aug 2005
Posts: 60
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From: new orleans
well I cracked the stock heads and since i have already taken the engine out i decided to go with more power...if that means going with just a new set of heads and going supercharged (which i have thought a little about) or going to Lt4. which ever one give more power but at a price range i can reach (and no i dont ahve a set price range). it just depends on what the power to money ratio is.....
For the goals you set the LT4 stuff is about the last thing you should be looking at. Might have been an OK choice a decade ago but is not today. There are a lot of better and cheaper options.
they dont make the lt4 conversion kit now more but you can still find the parts only thing getting a genuine lt4 intake manifold will be a hassle. if you going to get a supercharger i say go with the lt4 heads but if not you can get the lloyd elliot heads and cam stage 2 for that much. turning your motor into a lt4 wont give you alot of hp gain the lt4 hot cam is a pretty mild cam
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Staging Lane
Joined: Aug 2005
Posts: 60
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From: new orleans
Originally Posted by 96capricemgr
For the goals you set the LT4 stuff is about the last thing you should be looking at. Might have been an OK choice a decade ago but is not today. There are a lot of better and cheaper options.
TECH Enthusiast
Joined: May 2006
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From: Metairie, LA
What are your power goals? Is it a daily driven car, once its put back together? How much money do you want to spend? Will it see the track? Answer some of these questions and you'll get better responses.
A supercharger plus LT4 heads and intake would cost upwards of $5000 plus labor. You could just as easily search around the for sale section and pickup some used LE heads(much easier to find than LT4 heads) and cam, a stroker kit(383) and the LT4 intake you can now get from Summit. Wanna go cheaper, $500 can get the block work for a 355(seawolf06 can show you where to go), heads, LT4 hotcam and some nitrous. All depends on your goals and intended use.
A supercharger plus LT4 heads and intake would cost upwards of $5000 plus labor. You could just as easily search around the for sale section and pickup some used LE heads(much easier to find than LT4 heads) and cam, a stroker kit(383) and the LT4 intake you can now get from Summit. Wanna go cheaper, $500 can get the block work for a 355(seawolf06 can show you where to go), heads, LT4 hotcam and some nitrous. All depends on your goals and intended use.
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Thread Starter
Staging Lane
Joined: Aug 2005
Posts: 60
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From: new orleans
Originally Posted by eLTwerker
What are your power goals? Is it a daily driven car, once its put back together? How much money do you want to spend? Will it see the track? Answer some of these questions and you'll get better responses.
A supercharger plus LT4 heads and intake would cost upwards of $5000 plus labor. You could just as easily search around the for sale section and pickup some used LE heads(much easier to find than LT4 heads) and cam, a stroker kit(383) and the LT4 intake you can now get from Summit. Wanna go cheaper, $500 can get the block work for a 355(seawolf06 can show you where to go), heads, LT4 hotcam and some nitrous. All depends on your goals and intended use.
A supercharger plus LT4 heads and intake would cost upwards of $5000 plus labor. You could just as easily search around the for sale section and pickup some used LE heads(much easier to find than LT4 heads) and cam, a stroker kit(383) and the LT4 intake you can now get from Summit. Wanna go cheaper, $500 can get the block work for a 355(seawolf06 can show you where to go), heads, LT4 hotcam and some nitrous. All depends on your goals and intended use.
its going to be a weekend drag strip car not a daily driver. Money is the what im worried about. I can save for what i need... Yes it will see the track
I do all of the labor myself with the exception of the tranny. No one touchs my car except me. What are LE heads though?... I havent heard of them.
Thread Starter
Staging Lane
Joined: Aug 2005
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From: new orleans
Originally Posted by transamws6_97
LE heads are lloyd elliot heads. he has really nice packages http://eportworks.com/ is his site.
wow... nice thanks a lot!!!!!!
Staging Lane
Joined: Mar 2006
Posts: 64
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The LT4 does do 425hp... on an engine dyno not at the rear wheels 
And it will give you more than a 40hp gain at the wheels if you do the heads/intake not just the hotcam.
The question should be is it worth it to go with the LT4 conversion with the custom cams and head work that can be done for almost the same price to give better performance.
Back to
And it will give you more than a 40hp gain at the wheels if you do the heads/intake not just the hotcam.
The question should be is it worth it to go with the LT4 conversion with the custom cams and head work that can be done for almost the same price to give better performance.
Back to
TECH Junkie
Joined: Nov 2003
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From: CHITOWN
Originally Posted by 94 Formula
The LT4 does do 425hp... on an engine dyno not at the rear wheels
And it will give you more than a 40hp gain at the wheels if you do the heads/intake not just the hotcam.
The question should be is it worth it to go with the LT4 conversion with the custom cams and head work that can be done for almost the same price to give better performance.
Back to
And it will give you more than a 40hp gain at the wheels if you do the heads/intake not just the hotcam.
The question should be is it worth it to go with the LT4 conversion with the custom cams and head work that can be done for almost the same price to give better performance.
Back to
The numbers are a little baised to me////
Staging Lane
Joined: Mar 2006
Posts: 64
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I could show the dyno chart from mine that shows less than 260 stock and around 360 with the LT4 conversion. Both numbers at the wheels. I never put the engine on an engine dyno, so I don't know the actual drivetrain loss, but take 360 at the wheels and factor in the drivetrain loss, it works out fairly close to advertised.
