Just got my flow #'s
06-18-2003, 05:33 PM
#1
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Join Date: Jan 2002
Location: Salt Lake City, Utah
Posts: 660
Just got my flow #'s
Tell me what you think:
Intake:
.100 65
.200 135
.300 190
.400 230
.500 248
.600 250
.700 251
Exhaust:
.100 51
.200 97
.300 137
.400 160
.500 177
.600 185
.700 189
Intake:
.100 65
.200 135
.300 190
.400 230
.500 248
.600 250
.700 251
Exhaust:
.100 51
.200 97
.300 137
.400 160
.500 177
.600 185
.700 189
06-18-2003, 05:59 PM
#4
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Join Date: Jun 2002
Location: sarasota, fl
Posts: 2,456
Originally posted by 95TA8280
Not gonna lie, they could be a lot better.....what cam do you have because that determines what lift it's up to? On my heads what they flow at .600 doesn't matter because my cam isn't good up to that lift.
Not gonna lie, they could be a lot better.....what cam do you have because that determines what lift it's up to? On my heads what they flow at .600 doesn't matter because my cam isn't good up to that lift.
for example
.......heads A........heads B
400...250..............250
450...255..............255
500...260..............260
550...265..............263
600...270..............265
650...275..............268
cam lift is 550
even though they both flow the same the same in the lift range.........head A's flow keeps increasing, where head B is becoming inefficient.
head A car will be faster.
someone correct me if im wrong
06-18-2003, 06:02 PM
#5
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Join Date: Jan 2002
Location: Salt Lake City, Utah
Posts: 660
A local guy here ported them.
I currently have a Hotcam and stock heads but sent in my buddy's spare set of heads/intake in to get them ported. Now that I have flow #'s I'm going to look at a custom setup.
I currently have a Hotcam and stock heads but sent in my buddy's spare set of heads/intake in to get them ported. Now that I have flow #'s I'm going to look at a custom setup.
06-18-2003, 07:52 PM
#7
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Join Date: Oct 2000
Location: Charlotte, NC
Posts: 786
250's is about what MOST people get - "most" including the guys claiming 270+ peak.
Either way, there's alot more to it than flow numbers.. how else do we make over 400rw SAE through full exh on an old stock shortblock with 250cfm and other people claim close to 280 & are 40hp down? LOL
Don't sweat it.. they look fine to me, just as good as most any $1k set you'll buy wherever.
Either way, there's alot more to it than flow numbers.. how else do we make over 400rw SAE through full exh on an old stock shortblock with 250cfm and other people claim close to 280 & are 40hp down? LOL
Don't sweat it.. they look fine to me, just as good as most any $1k set you'll buy wherever.
06-18-2003, 08:24 PM
#8
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Join Date: Sep 1999
Location: Kissimmee/Orlando, FL
Posts: 670
Phil is da man when it comes to this stuff but it looks pretty decent to me/ That is provided you didn't pay an arm and a leg for it.
No, they dont peak as high as Lloyd's or AI's stuff but the low lift numbers look good which is also very important.
No, they dont peak as high as Lloyd's or AI's stuff but the low lift numbers look good which is also very important.
06-18-2003, 08:44 PM
#9
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Join Date: Jul 1999
Location: Tx
Posts: 128
Not bad. I would suspect a port volume of say, 185 ccs. Just a guess on my part but one thing I would like to see is about 10 more cfm at each .100 of lift from .200-.500.
Either way, this head should be plenty capable of supporting 400rwhp or more if that is your goal. Keep the cam timing short though.
Take care
Either way, this head should be plenty capable of supporting 400rwhp or more if that is your goal. Keep the cam timing short though.
Take care
They're decent
06-19-2003, 01:52 AM
#11
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Join Date: Oct 2002
Posts: 6,518
Originally posted by got_hp?
from what ive read on this board..........flow numbers above lift are still important...
for example
.......heads A........heads B
400...250..............250
450...255..............255
500...260..............260
550...265..............263
600...270..............265
650...275..............268
cam lift is 550
even though they both flow the same the same in the lift range.........head A's flow keeps increasing, where head B is becoming inefficient.
head A car will be faster.
someone correct me if im wrong
from what ive read on this board..........flow numbers above lift are still important...
for example
.......heads A........heads B
400...250..............250
450...255..............255
500...260..............260
550...265..............263
600...270..............265
650...275..............268
cam lift is 550
even though they both flow the same the same in the lift range.........head A's flow keeps increasing, where head B is becoming inefficient.
head A car will be faster.
someone correct me if im wrong
That's a average job on heads as far as I have seen and I've seen GTP's do that curve.
I do agree with Mr. Horsepower though, 5-10cfm with around a 185cc intake volume would be nicer to see.
Bret
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