Swirl Port Cylinder Heads
05-28-2003, 01:15 PM
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Car: 1987 Formula
Engine: 383
Transmission: T56
Swirl Port Cylinder Heads
Hello everyone. I was wondering if anyone knew of specific casting numbers for the cylinder heads with the swirl port bump in the intake tract? After some researching on past threads, 187 and 193 seem to have that design. I was also wondering if these heads were restricted to TBI cars and/or trucks.
I have 081 castings on my LB9 and am considering some options as far as porting or replacing them. Someone had warned me about the bump in the intake tract, but it would seems that i am safe from this, although i haven't had the lower manifold off to check for sure.
Thanks,
TurboSteve
I have 081 castings on my LB9 and am considering some options as far as porting or replacing them. Someone had warned me about the bump in the intake tract, but it would seems that i am safe from this, although i haven't had the lower manifold off to check for sure.
Thanks,
TurboSteve
05-30-2003, 05:50 AM
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Car: 1990 Formula
Engine: 305 TPI
Transmission: WC T5
If you have 081 castings you are in good shape. A good port and polish job and they will flow nice. Sitting Bull has a good article in his sig that esplains how he did his.
08-15-2003, 09:04 PM
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Car: '87 Formula
Engine: 350
Transmission: Auto
While we're on the topic of these two different heads (193's and 081's), does anyone know flow numbers for both, or which would flow better (my 081's are slightly ported and polished, with new valve job). If the 305 081's will flow more I'm definitely going to swap them in for the 193's on this Caprice LO5.
All opinions appreciated, Thanks.
-Ben
All opinions appreciated, Thanks.
-Ben
08-16-2003, 03:43 AM
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You can either do a search of "193 heads" in the forums for more info and/or look here...
https://www.thirdgen.org/techbb2/sho...hreadid=177465
and here...
https://www.thirdgen.org/techbb2/sho...hreadid=192114
Probably would want to look at Dyno Don's numbers. As well as a few other people who actually have experience with them, have some useful information also.
https://www.thirdgen.org/techbb2/sho...hreadid=177465
and here...
https://www.thirdgen.org/techbb2/sho...hreadid=192114
Probably would want to look at Dyno Don's numbers. As well as a few other people who actually have experience with them, have some useful information also.
Last edited by badone07; 08-16-2003 at 03:48 AM.
08-16-2003, 11:01 AM
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Car: '87 Formula
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Ya actually I've read both those posts, and done some research on 193's, didn't find a whole lot. I just wondered if anyone had some real side by side comparisons (flow numbers) or by experience. I would guess the 081's would still flow better even with the .1" smaller diameter intake valves (with the porting). Exhaust valves are the same I think. So ya, just wanted to know if anyone had some usable experience in which I could compare the two.
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