LT-4 conversion kit for LT-1
Thread Starter
Racer
Joined: Dec 2004
Posts: 429
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From: Midddleburg FL
LT-4 conversion kit for LT-1
I seen a conversion kit for an LT-1 mentioned on this forum a few times. Can someone give me some info on this please. Parts, price, where to get it and all that good stuff! Thanks! 
Race Director
Joined: Sep 2004
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
I've seen them atsummit , jegs , and scoggin dickey
The difference between the LT1 and LT4 was the heads. The LT4 has an improved design that provides better flow through raised runners, thus the difference in intake since the runners will not match to that of the LT1. From what I've seen, porting the stock heads or getting some aftermarket heads (AFR, Edelbrock, ect...) is a more cost effective way of producing power. It may be something to look into.
The difference between the LT1 and LT4 was the heads. The LT4 has an improved design that provides better flow through raised runners, thus the difference in intake since the runners will not match to that of the LT1. From what I've seen, porting the stock heads or getting some aftermarket heads (AFR, Edelbrock, ect...) is a more cost effective way of producing power. It may be something to look into.
Drifting
Joined: Aug 2004
Posts: 1,830
Likes: 1
From: atlanta Georgia
the best bang for you buck would be getting your stock heads ported and polished and the intake ported to match from www.precisionporting.com these heads will use your stock ones and out flow the stock lt4 heads
you can get it for about $1200
then buying a Lt4 hot cam kit -less than $500
and with that you get the lt4 hot cam, lt4 springs, 1.6 rrs etc
you are now at 1700 and for less than $500 you can get a tune!
that way youll make sure you get all the hp!
youll be about 45-70 hp better than b4!
and its the same price!
just my 2 cents
you can get it for about $1200
then buying a Lt4 hot cam kit -less than $500
and with that you get the lt4 hot cam, lt4 springs, 1.6 rrs etc
you are now at 1700 and for less than $500 you can get a tune!
that way youll make sure you get all the hp!
youll be about 45-70 hp better than b4!
and its the same price!
just my 2 cents
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by BDVETTE96
its around 2,200 dollars, it will give you a 30 hp increase but it is a lot of money to spend for 30 hp.
Also you can get the parts for quite a bit less than $2200 if you shop around.
Plus everybody always fails to realize that if you go the LT4 route you get to sell your LT1 heads and cam to recoup a little of the cost.
Last edited by VenkmanP; Jan 3, 2005 at 04:47 PM.
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by redbullapril23
yea I hate when companies advertise hp as crank hp or flywheel
its like 30 at the wheels! is what we are saying!
its like 30 at the wheels! is what we are saying!
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Drifting
Joined: Aug 2004
Posts: 1,830
Likes: 1
From: atlanta Georgia
well I'm gonna get them stg 3 ported from precision porting
and get the intake to match
I am saying for the $ you can get batter flowing heads! and thus more hp
but if you have lt4 heads then get them coated the stg 3 lt4 will out flow stg 3 lt1 but its like alot more expensive! and at that you might as well get AFR heads if you start from scratch!
your friend
Sean
and get the intake to match
I am saying for the $ you can get batter flowing heads! and thus more hp
but if you have lt4 heads then get them coated the stg 3 lt4 will out flow stg 3 lt1 but its like alot more expensive! and at that you might as well get AFR heads if you start from scratch!
your friend
Sean
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by redbullapril23
well I'm gonna get them stg 3 ported from precision porting
and get the intake to match
I am saying for the $ you can get batter flowing heads! and thus more hp
but if you have lt4 heads then get them coated the stg 3 lt4 will out flow stg 3 lt1 but its like alot more expensive! and at that you might as well get AFR heads if you start from scratch!
your friend
Sean
and get the intake to match
I am saying for the $ you can get batter flowing heads! and thus more hp
but if you have lt4 heads then get them coated the stg 3 lt4 will out flow stg 3 lt1 but its like alot more expensive! and at that you might as well get AFR heads if you start from scratch!
your friend
Sean
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by redbullapril23
well I'm gonna get them stg 3 ported from precision porting and get the intake to match
Also, with a stage 3 port you are presumably getting bigger valves, so you're discarding the special LT4 valves.
And in that case you would be better off getting bare LT4 heads instead of the ones in the kit, since you're not using the valvetrain components anyway.
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
Originally Posted by steve9899
From what I've seen of flow #s, if you're going to get a substantial port job, then you are better off getting the LT1s ported than getting LT4s. As the amount of porting increases, the difference in flow #s between the two shrinks.
Also, with a stage 3 port you are presumably getting bigger valves, so you're discarding the special LT4 valves.
And in that case you would be better off getting bare LT4 heads instead of the ones in the kit, since you're not using the valvetrain components anyway.
Also, with a stage 3 port you are presumably getting bigger valves, so you're discarding the special LT4 valves.
And in that case you would be better off getting bare LT4 heads instead of the ones in the kit, since you're not using the valvetrain components anyway.
Drifting
Joined: Aug 2004
Posts: 1,830
Likes: 1
From: atlanta Georgia
now the smaller flowing afr heads arent worth it in my mind but the 210cc is! it jsut depends if you wanna go all out or get the best bang for your buck
i want the bang for buck. I am not saying i am gonna buy the lt4 heads i just wanna see how much he wants and if the price is right I will buy!
well these are just my opinions you dont have to agree with them or listen to them.
i want the bang for buck. I am not saying i am gonna buy the lt4 heads i just wanna see how much he wants and if the price is right I will buy!
well these are just my opinions you dont have to agree with them or listen to them.
Drifting
Joined: Oct 2001
Posts: 1,759
Likes: 0
From: Round Rock,Austin, Texas
Im with redbullapril23 on this. I just got some stage 2 heads from precision porting for 1200 and a custom cam as well as stage 3 LT4 intake. All for the same price as this conversion kit and I expect to make alot more HP than they claim for the same price. I will post after it is all installed with results. I would talk with Bob at precision porting. He can set you up with some awesome heads for cheap and is very knowledgeable on the subject. He is also doing a Group purchase price right now for stage 2 for $1k. http://www.precisionporting.com/vettegp.html
Safety Car
Joined: Apr 2003
Posts: 3,793
Likes: 9
From: VA
Originally Posted by redbullapril23
now the smaller flowing afr heads arent worth it in my mind but the 210cc is! it jsut depends if you wanna go all out or get the best bang for your buck
i want the bang for buck. I am not saying i am gonna buy the lt4 heads i just wanna see how much he wants and if the price is right I will buy!
well these are just my opinions you dont have to agree with them or listen to them.
i want the bang for buck. I am not saying i am gonna buy the lt4 heads i just wanna see how much he wants and if the price is right I will buy!
well these are just my opinions you dont have to agree with them or listen to them.