LT4 intake on LT1?
Thread Starter
Safety Car
Joined: Jun 2003
Posts: 4,510
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From: Coconut Creek FL
LT4 intake on LT1?
Is there anything to be gained by putting an LT4 intake on a stock LT1? I understand the runners are bigger, but is the mouth larger as well?- what might one expect other then a pretty red intake?
94 LT1 A4
Thanks!
94 LT1 A4
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...
If you use the LT4 intake on a stock LT-1... I believe you can expect to loose horsepower. The opening is bored for the 52mm throttle body, the runners are larger and they are raised to promote better flow capabilities... which defines the problem.
The LT4 raised runner ports will not match up to an LT1 motor so you will loose all of the gains that you'd typically expect. You may even loose power overall. Add the LT4 heads and you are in business.
The LT4 raised runner ports will not match up to an LT1 motor so you will loose all of the gains that you'd typically expect. You may even loose power overall. Add the LT4 heads and you are in business.
Drifting
Joined: May 2004
Posts: 1,280
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From: Gretna NE
St. Jude Donor '09
Originally Posted by kwik_ta
If you use the LT4 intake on a stock LT-1... I believe you can expect to loose horsepower. The opening is bored for the 52mm throttle body, the runners are larger and they are raised to promote better flow capabilities... which defines the problem.
The LT4 raised runner ports will not match up to an LT1 motor so you will loose all of the gains that you'd typically expect. You may even loose power overall. Add the LT4 heads and you are in business.
The LT4 raised runner ports will not match up to an LT1 motor so you will loose all of the gains that you'd typically expect. You may even loose power overall. Add the LT4 heads and you are in business.
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
The diference is not in th ebore for the TB but rather where the intake runners set on the heads. If you set an LT1 intake on LT4 heads you will see about 1/8 gap because of the diference in the runners.
Safety Car
Joined: Dec 2002
Posts: 3,655
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From: Charleston SC
Originally Posted by ddr698
But are the bolt locations the same? What im wondering is it actually physically possible to bolt an LT4 down to LT1 heads disregarding how mismatched the runners will be?
Thread Starter
Safety Car
Joined: Jun 2003
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From: Coconut Creek FL
I was thinking that there were some differences in them...if I go the head\intake route...It would behoove me to put in the LT4 hot cam and lifters as well...
then it would be exhaust and so on...and so on...
I raised this question once before- the LT4 "Hot Kit"
then it would be exhaust and so on...and so on...
I raised this question once before- the LT4 "Hot Kit"
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
Originally Posted by byte_me
then it would be exhaust and so on...and so on...
I raised this question once before- the LT4 "Hot Kit"
I raised this question once before- the LT4 "Hot Kit"
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Thread Starter
Safety Car
Joined: Jun 2003
Posts: 4,510
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From: Coconut Creek FL
Originally Posted by FD2BLK
Yes and so on and so on, Now are you talking about the LT4 upgrade or the LT4 Hotcam kit?
I just wonder how the 4l60e would like the extra bump in HP...and if the 425HP they suggest is realistic without major exhaust (i.e. headers) and a chip burn...I read my fuel rails would fit back on...I am just not sure I want to rip a 57K fully operating LT1 apart just yet!
Decisions, decisions, decisions....