LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

LT1 head quest... need info

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Old Feb 8, 2004 | 08:29 AM
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MichiganSkip's Avatar
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LT1 head quest... need info

What did the "372" head come on?
Old Feb 8, 2004 | 10:44 AM
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Old Feb 8, 2004 | 11:20 AM
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T/A#4's Avatar
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The WHAT ????????????????
Old Feb 8, 2004 | 11:23 AM
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You must be talking about some older casting numbers. Really in the LT1 Tech section here we only deal with LT1 and LT4 heads since our reverse flow heads are not really compatable with older blocks generation I blocks. You might try asking the guys over in the Classic Tech section and give as many details as you can. IE what you think it may have come on, what's desirable about it etc. Maybe that will jog someones memory over there.
Old Feb 8, 2004 | 01:09 PM
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I read an article in GMHTP a few years ago about SBC headflow comparisons. One of the heads was what they refered to as an "LT1" head that had a casting number with the "372" I may be mistaken but I thought I read it as a 4th gen LT1 head.

http://www.chevyhiperformance.com/te...98/index4.html


Here's the link

Last edited by MichiganSkip; Feb 8, 2004 at 01:25 PM.
Old Feb 8, 2004 | 03:11 PM
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Yup...That's a 4th gen LT1 head. I'll do some checking and get back to you.

Frank
Old Feb 8, 2004 | 03:16 PM
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Still trying to find the specific year...Here's flow data on that head, though.
http://purplesagetradingpost.com/sum...GM%20LT1%20372

Frank
Old Feb 8, 2004 | 05:17 PM
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I have seen lots of 374 castings but not any 372's.

Could be a tyo or a rare head, not sure.

FWIW, the 374's do seem to have a lil more meat at the pushrod pinch and if it is a good and centered casting (no core shift), the push rod walls can be opened up pretty good.

Lloyd

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Old Feb 8, 2004 | 06:05 PM
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Originally posted by NightTrain66
I have seen lots of 374 castings but not any 372's.

Could be a tyo or a rare head, not sure.

FWIW, the 374's do seem to have a lil more meat at the pushrod pinch and if it is a good and centered casting (no core shift), the push rod walls can be opened up pretty good.

Lloyd

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LOL...I guess mine (off my '93) must not have been 374's. My head porter told me the core shift was worse than any he had ever seen. I still can't explain why the car went a 12.82 with a completely stock engine with exhaust manifolds, though.
He must've got them in pretty good condition because they ended up flowing 271 CFM @ .550" when he was done with them.

Frank
Old Feb 9, 2004 | 12:45 AM
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Core shift on one of my heads was hellacious The divider between two ports on one side of the intake looked smooshed!
Old Feb 9, 2004 | 01:55 AM
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Originally posted by 12SCNDZ
LOL...I guess mine (off my '93) must not have been 374's. My head porter told me the core shift was worse than any he had ever seen. I still can't explain why the car went a 12.82 with a completely stock engine with exhaust manifolds, though.
He must've got them in pretty good condition because they ended up flowing 271 CFM @ .550" when he was done with them.

Frank
I call B.S. on this one. No way a GM production completely Stock 1993 Camaro Z28 went 12.82 in the 1/4 mile. Maybe I'm missing something, but here's your flag

If I'm wrong, I'm sorry.... :blah:

Last edited by scoobysnax83; Feb 9, 2004 at 01:57 AM.
Old Feb 9, 2004 | 04:01 AM
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I think he ment stock bottom-end.

As in, AFTER the heads flow'ed 271cfm @ 0.550
Old Feb 9, 2004 | 04:16 AM
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Originally posted by Steve in Seattle
I think he ment stock bottom-end.

As in, AFTER the heads flow'ed 271cfm @ 0.550
that would make much more sense, just didn't really come out like that.
Old Feb 9, 2004 | 04:41 AM
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no im pretty sure he meant stock motored, he had the 4:10geared A4 i believe
Old Feb 9, 2004 | 04:44 AM
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if u have anymore questions, talk to RamAir95TA his car went 12.8s stock converter stock heads stock cam i beleieve he also trapped 108



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