Flow Numbers for my heads, what do you think?
Flow Numbers for my heads, what do you think? The heads on my car flow as follows, good bad or fair? They are 10.8:1 Compression ratio heads.
Lift Intake Exhaust
200 147 107
300 211 149
400 257 175
450 271 201
500 278 212
525 281 214
550 280 215
Tested with:
28 inches of H2O
3.9 inch bore
How do these numbers compare to stock heads? Not sure these are making the power I was thinking they would.
Thanks!
Bill
Lift Intake Exhaust
200 147 107
300 211 149
400 257 175
450 271 201
500 278 212
525 281 214
550 280 215
Tested with:
28 inches of H2O
3.9 inch bore
How do these numbers compare to stock heads? Not sure these are making the power I was thinking they would.
Thanks!
Bill
They look pretty typical for a ported LS1 casting taken off a SuperFlow 600 bench or something that reads pretty similar. If they are ported LS6 castings then I would consider the numbers a little soft. Assuming a small cross section (not huge port volume) the heads should provide significant gains over stock LS1 castings and mediocre gains over stock LS6 castings.
Good luck and let us know how you make out...
Tony M.
PS....By the way, assuming no air leaks during the test, the low and midlift flow on the intake is very good....get those heads on top of a shortblock.
Good luck and let us know how you make out...
Tony M.
PS....By the way, assuming no air leaks during the test, the low and midlift flow on the intake is very good....get those heads on top of a shortblock.
Last edited by Tony Mamo @ AFR; May 20, 2005 at 12:08 PM.
Originally Posted by Bo White
I agree with Tony. Average .300/.400 #s on the intake are 198-202/245-250 
Like Bo said. Midlift is strong as compared to the peak numbers. Should make some power.
Brandon
Originally Posted by Bill'sWS6
The heads on my car flow as follows, good bad or fair? They are 10.8:1 Compression ratio heads.
Lift Intake Exhaust
200 147 107
300 211 149
400 257 175
450 271 201
500 278 212
525 281 214
550 280 215
Tested with:
28 inches of H2O
3.9 inch bore
How do these numbers compare to stock heads? Not sure these are making the power I was thinking they would.
Thanks!
Bill
Lift Intake Exhaust
200 147 107
300 211 149
400 257 175
450 271 201
500 278 212
525 281 214
550 280 215
Tested with:
28 inches of H2O
3.9 inch bore
How do these numbers compare to stock heads? Not sure these are making the power I was thinking they would.
Thanks!
Bill
Originally Posted by 98t56TA
Seems somewhat 'mysterious' to me. Why such high compression...don't ls1s run better with moderate compression.
there just ported 5.7 heads milled .030. and compression is your friend bill; whats the valve sizing and i assume no pipe on the exhaust?
i just read your other post about the track times.i feel the same way about my heads.but your low- midlifts look strong,you should be making some decent power.is your car tuned?if you can,do some logging next time you take it to the track to see if you have any KR and what your total advance is.
Trending Topics
Mid-lift numbers look VERY strong. Let's see what kind of power you make. Oh, and compression is your friend.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Originally Posted by jrp
what so mysterious about it there just ported 5.7 heads milled .030. and compression is your friend
bill; whats the valve sizing and i assume no pipe on the exhaust?
there just ported 5.7 heads milled .030. and compression is your friend bill; whats the valve sizing and i assume no pipe on the exhaust?
Just feel someone has just tossed the numbers. Not sure they are real accurate?
Thanks,
Bill
Originally Posted by Patrick G
Mid-lift numbers look VERY strong. Let's see what kind of power you make. Oh, and compression is your friend.
I will post my numbers and see what you guys think.
Thanks,
Bill
Originally Posted by 66deuce
i just read your other post about the track times.i feel the same way about my heads.but your low- midlifts look strong,you should be making some decent power.is your car tuned?if you can,do some logging next time you take it to the track to see if you have any KR and what your total advance is.
Thanks,
Bill