318 stroker - Piston itch....
Thanks for the replies and sorry for the late response.
I hear you both on the head issues, however mine are not "normal" 318 heads...they have had the runners welded and the ports enlarged..the velocity has been checked and is awesome...they have over 40 hours welding work in them, and the flow figures are significantly good, especially on the exhaust side -
That said...there has to be a reason why I got P-V problems - with both Intake AND exhaust valve strike....so I think whatever the issue was...it wasnt just valve size....
We took 140th off the Speed Pro forged slugs (left around 220th) , and eventually fixed the problem, but Im restricted with cam lift.
- In summary it sounds to me like unless I shell for some Diamonds.....I should look to a 360 as a better "next option"....
FWIW I think you both summarised the "end game" of doing a 349 very well.......its probably more trouble than its worth.....
Heres my head flow figs and a pic, so BJR can rest easy ! LOL!!
( The guy that ported them , did them for an experiment - he is a very talented "head porter" - he's been doing them for twenty years)
Flow figs
int
lift..../cfm
.100/69
.200/123
.300/185
.400/220
.500/223 (Now .500/230)
Thanks for the replies and sorry for the late response.
I hear you both on the head issues, however mine are not "normal" 318 heads...they have had the runners welded and the ports enlarged..the velocity has been checked and is awesome...they have over 40 hours welding work in them, and the flow figures are significantly good, especially on the exhaust side -
That said...there has to be a reason why I got P-V problems - with both Intake AND exhaust valve strike....so I think whatever the issue was...it wasnt just valve size....
We took 140th off the Speed Pro forged slugs (left around 220th) , and eventually fixed the problem, but Im restricted with cam lift.
- In summary it sounds to me like unless I shell for some Diamonds.....I should look to a 360 as a better "next option"....
FWIW I think you both summarised the "end game" of doing a 349 very well.......its probably more trouble than its worth.....
Heres my head flow figs and a pic, so BJR can rest easy ! LOL!!
( The guy that ported them , did them for an experiment - he is a very talented "head porter" - he's been doing them for twenty years)
Flow figs
int
lift..../cfm
.100/69
.200/123
.300/185
.400/220
.500/223 (Now .500/230)
