i had a friend of mine port my heads for me, and i just had them flow benched. im kinda upset at the results and i'd like to know what to do to make the exhaust flow a little bit more. if anyone has any suggestions, please let me know what you think i should do to get these heads flowing better. valves are 1.94 / 1.5 w/ a 3 angle valve job. i don't want to put a lot of money into these heads so i'd probably end up porting these heads myself. like i said, any suggestions on how to get the exhaust cfm's up would be greatly appriciated i'm just wondering how my intake seems to be flowing better but my exhaust doesn't. thanks in advance

lift intake exhaust
|-------|--------------|-----------
050 30.5 cfm 22.3 cfm
100 62.0 cfm 45.8 cfm
150 95.0 cfm 67.0 cfm
200 126.0 cfm 87.5 cfm
250 154.0 cfm 102.0 cfm
300 173.0 cfm 112.0 cfm
350 190.0 cfm 120.0 cfm
400 204.0 cfm 127.0 cfm
450 208.5 cfm 133.0 cfm
500 207.0 cfm 137.0 cfm

 

That's because those heads are not worth screwing with, regardless what anybody tells you. They are old school technology. Put your time and $$$ into something worth while.

 

Not so. You just have to spend some time with them. Without seeing what has already been done I can't offer any advise but you can look over the thread linked at the end of my sig for some help.

 

Actually the intake side on your heads kinda sucks too.

You should be a right around 225-235 for a home ported head with 160-180 on the exhaust side. (1.94-1.50 valves)

Was the head flowed with a inlet radius plate and exhaust tube during testing? makes a difference.

Like SB said hard to tell ya more without seeing whats done to the ports.

many people had gotten good results with these heads.

 

at the bottom of my flow chart, it says "radius inlet" and some markings i can't understand, and then it also says "open no pipe"...

i think im just going to go out and get some better heads for later down the line in a few months