Read through the link you have there... no mention of heads on your truck,
are you running stock? Not that I could match your setup, I weigh in at
about 600lbs heavier, and need all the torque I can get, thats why Im
thinking that the R/T heads would maybe be too much for the 318, with a mild
cam..... I have to still pass emmsions when Im all done putting this
together... do you have emmsions where you are at?
-- Original Message -----
From: "RayB" <bpracing@worldnet.att.net>
To: <dakota-truck@dakota-truck.net>
Sent: Wednesday, March 19, 2003 4:22 PM
Subject: DML: RE: Mag Ported Head ?
>
>
>
> > -----Original Message-----
> > From: owner-dakota-truck@bent.twistedbits.net
> > [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of TJ
> > OK, gotta question here... according to my reading, if you can get 2
heads
> > to flow the exact same numbers (230cfm) at say, 28"... one having a
153cc
> > intake port w/ a 1.97" valve, and the other having a 180cc port w/ a
1.92
> > valve, the head with the 153cc port is better because it will
> > have a higher
> > intake velocity. IS THIS CORRECT??? OR does the intake valve size
change
> > this theory because according to hughes engines this is the way
> > it works....
> > NOW if you look in the 2001 MP catalog, the 2 heads I just
> > compared were the
> > stock ported mag heads and the R/T heads... the stock ported being the
> > better head. How and Why is this??
> >
> > TJ
>
> The smaller the engine, the more velocity you want. The lower the rpm
range
> you use most, the more velocity you want. You should also pay attention
to
> the valve lift at which these flow rates were measured. You'll want the
> most flow at something below *your* maximum cam lift. The MP Magnum
engine
> book has some very good examples.
>
> RayB
> http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html
>
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