here it goes all at once................
well diggin into my head/intake porting project and have a bunch of questions maybe you could all offer me some answers to, any help is appreciated
here it goes (sorry kind of long)......
backcutting the valves?? what does this mean? i saw it in grassroots
motorsports article and they said this yields huge gains per hour spent and
should always be done i can post this article also if anyone wants it
=====
radius the face of the exhaust valve for ow lift flow gains?? how much?
how much material to grind off??
i believe this means just grinding a littl eangle on the face of the exhaust valve to blend it into the seat a little right??
======
i know flattening the intake port and widening it can cause good gains,so
does flattening the roof of the xhaust port and widening that do the
same thing? also raising the exhaust port roof helps flow, should the
intake port roof (to increase the straigth shot "window") or the intake
floor (air is heavy and flows mostly on the intake floor
because of the direction of the air) what should be done to the intake port
i have seen pics of E7TE ports on workmonster.com and their ports almost seem
to have a general triangle shape to them,
======
maybe if someone has a set of TFS or aftermarket heads in their garage
they could check them out for me and tell me if the ports are certainly
square of maybe have abit of a triangle shape
====
only running an E cam and some 1.7 roller rockers, advise for or against
grinding down the valve guide bosses?? maybe just a little?? maybe grind them completely away??
====
heard of a tooled finish where the intake becomes increasingly smooth as
port size shrinkg and port velocity increases because rough port walls are
no longer needed to keep fuel atomized, this is common in race harley engine and makes sense
what do you guys think?
=====
does a vane behind the exhaust port valve guide boss any help? i have heard that leaving a vane behine the intake valve guide boss helps direct air a bit
so there isn't too much turbulence behind the intake valve guide boss and
smooths flow
would this help on the exhaust valve guide boss in any way?
====
smoothing the combustion chamber... not worth the loss of compression? i'm using sotck E7TE heads with stock valve size.
=====
i know each of these is probably just a little gain but they add up!! maybe someone with a flowbench out there or professional porter could answer some of my questions and help me out!!?? i've kind of been wondering about this stuff for a long time planning on having a port flowed when i'm done also.
i know each of these takes a lot of time, but that is the one thing i've got plenty of!! not in any hurry to get these done, would rather spend the time to do it the best i can.
thanks for any help anyone can offer!!
well diggin into my head/intake porting project and have a bunch of questions maybe you could all offer me some answers to, any help is appreciated
here it goes (sorry kind of long)......
backcutting the valves?? what does this mean? i saw it in grassroots
motorsports article and they said this yields huge gains per hour spent and
should always be done i can post this article also if anyone wants it
=====
radius the face of the exhaust valve for ow lift flow gains?? how much?
how much material to grind off??
i believe this means just grinding a littl eangle on the face of the exhaust valve to blend it into the seat a little right??
======
i know flattening the intake port and widening it can cause good gains,so
does flattening the roof of the xhaust port and widening that do the
same thing? also raising the exhaust port roof helps flow, should the
intake port roof (to increase the straigth shot "window") or the intake
floor (air is heavy and flows mostly on the intake floor
because of the direction of the air) what should be done to the intake port
i have seen pics of E7TE ports on workmonster.com and their ports almost seem
to have a general triangle shape to them,
======
maybe if someone has a set of TFS or aftermarket heads in their garage
they could check them out for me and tell me if the ports are certainly
square of maybe have abit of a triangle shape
====
only running an E cam and some 1.7 roller rockers, advise for or against
grinding down the valve guide bosses?? maybe just a little?? maybe grind them completely away??
====
heard of a tooled finish where the intake becomes increasingly smooth as
port size shrinkg and port velocity increases because rough port walls are
no longer needed to keep fuel atomized, this is common in race harley engine and makes sense
what do you guys think?
=====
does a vane behind the exhaust port valve guide boss any help? i have heard that leaving a vane behine the intake valve guide boss helps direct air a bit
so there isn't too much turbulence behind the intake valve guide boss and
smooths flow
would this help on the exhaust valve guide boss in any way?
====
smoothing the combustion chamber... not worth the loss of compression? i'm using sotck E7TE heads with stock valve size.
=====
i know each of these is probably just a little gain but they add up!! maybe someone with a flowbench out there or professional porter could answer some of my questions and help me out!!?? i've kind of been wondering about this stuff for a long time planning on having a port flowed when i'm done also.
i know each of these takes a lot of time, but that is the one thing i've got plenty of!! not in any hurry to get these done, would rather spend the time to do it the best i can.
thanks for any help anyone can offer!!
