something wrong? or is it!

took my heads to a guy just to see what they would flow and man I was disappointed! int valve 2.350 ex valve 1.880 these look more like small block #'s to me!
ask what bore spacing did he used and he said 4.500. don't know the factory flow # but they have to be more than this!
I think out the box when they were new they did better than this!


int.28'' EX.28''
.100 -80 .100-70
.200-167 .200-127
.300-244 .300-169
.400-310 .400-197
.500-346 .500-221
.600-343 .600-236
.700-335 .700-249
.800-335 .800-255

seem like iam missing anywere from 70-100 cfm up to .800 lift! do seem right or did he not do something right in his flow work! let me know what you think!

motorsport a460 heads! sf 600 flow beach:D

That is a little on the low side and more like what the B460 heads would flow but close to about right for an "out of the box" original A460 Motorsport head with no port work however, they were never available with a 2.350" intake valve from Ford.

the guy I bought them from said he will text me the flow sheet he got with the heads, and said that they definitely flowed somewhere in the 390 on int and high 200's. will let you guys know when he text it to me tonite!

That's a little low but not much.mine did around 360 I think but with 2.3 valve. I didn't have any problem getting 425 out of them.

ok guys the guy I bought the heads from contacted me and sent me the real #'s over to my phone! here they are
sorry int valve 2.300 ext 1.88
int                ext
.200-178      .200-134
.300-242       .300-174
.400-303       .400-214
.500-355       .500-244
.600-375        .600-260
.700-384        .700-273
.800-390         .800-280



superflow sf 600@28''  


they came  off of a 2000lb dragster with a 477 with these heads  going 8.20-8.30 in the heat  and 7.95 he said  in good air! don't remember the compression!
so with kind of hp power you guys think I can make on a 598 motor 13.1 comp  n/a and on a 350 shot of the good stuff! my car is 2750 wirh me in it! and thanks guys!

these are unported a460 motorsport heads! now that I know they are virgin heads they will now got a port and polish job! shouldn't be hard to get them in the 400cfm range int and 300cfm on ext!

My flow bench puts frowns on a lot of people's faces. I have a hard time believing an unported set of heads flowed anywhere near the upper 300 range with that casting.

It's a good thing flow benches don't win races

yellowhorse7 wrote:It's a good thing flow benches don't win races

correct. but it does pay the bills. it's just a shame that some people inflate their numbers to make people happy.

whatbumper wrote:My flow bench puts frowns on a lot of people's faces.  I have a hard time believing an unported  set of heads flowed anywhere near the upper 300 range with that casting.

Which bench do you have?

Lem Evans wrote:

whatbumper wrote:My flow bench puts frowns on a lot of people's faces.  I have a hard time believing an unported  set of heads flowed anywhere near the upper 300 range with that casting.

Which bench do you have?

it sounds like a mourners bench

yellowhorse7 wrote:It's a good thing flow benches don't win races

you right about that!

yellowhorse7 wrote:It's a good thing flow benches don't win races

If a guy leaves late he is damn sure beat....is that what you are addressing?

whatbumper wrote:My flow bench puts frowns on a lot of people's faces.  I have a hard time believing an unported  set of heads flowed anywhere near the upper 300 range with that casting.

Are you saying that you are the one that flowed the OP heads?

jones wrote:

whatbumper wrote:My flow bench puts frowns on a lot of people's faces.  I have a hard time believing an unported  set of heads flowed anywhere near the upper 300 range with that casting.

Are you saying that you are the one that flowed the OP heads?

No, I've not touched his heads.  

Lem, I have a sf-1020 bench.

ran the flow sheet #'s threw my desktop dyno  software and it made  942hp with 12.7.1  comp  843tq  598ci ,that's without the nos! with the nos  its talking about 1220hp  1280tq on 300 shot,which should get me were iam trying to get to,  in the 7 second zone! not really trying to brake in to the 1000hp zone on motor. just trying  leave enough quench for the nos, need a big tuning window! so making 1000hp+ would be nice its not the hole story for me as a dedicated nos car! 2750lb mustang! I have a induction solution fogger with a lot more spray to go! love you guys input!

whatbumper wrote:

yellowhorse7 wrote:It's a good thing flow benches don't win races

correct.   but it does pay the bills.  it's just a shame that some people inflate their numbers to make people happy.  

Jeff Jones of Washington, IN. has a 1020 and a 600 SF. They don't produce the same numbers.... the same room and operator. It's not always a case of someone fudging the numbers.

Lem Evans wrote:

whatbumper wrote:

yellowhorse7 wrote:It's a good thing flow benches don't win races

correct.   but it does pay the bills.  it's just a shame that some people inflate their numbers to make people happy.  

Jeff Jones of Washington, IN. has a 1020 and a 600 SF. They don't produce the same numbers.... the same room and operator. It's not always a case of someone fudging the numbers.

I understand that but in this industry it seems the norm for guys to do that for some reason. Everyone is a head porter now right? LOL

If these really went 390 unported that's awesome.

Lem Evans wrote:

yellowhorse7 wrote:It's a good thing flow benches don't win races

If a guy leaves late he is damn sure beat....is that what you are addressing?

All I meant was that I've seen (we ALL have) heads that flow shit on a bench but still seem to make impressive power numbers real-time. And there plenty of head porters out there that inflate numbers to sell product and service. For example.....P51 heads lol

What's interesting, relative to the power vs flow equation, is the effect of valve jobs & valve shapes while using the same port.

Sometimes there is a gain in flow and more power. Sometimes there is no more flow and more power and sometimes there is a little less flow and more power.

Maybe it's a wet flow deal or the package is more resistant to reversion or maybe both.