1. From what I've heard 4.7s are air starved to begin with.
2. I don't know what year your stuck in, but todays cars are fuel
injected. Carberator logic has little relevance. The computer controls
fuel supply to make good ratios.
I haven't seen headers in Bill's lists.
Jay W
KenCo wrote:
> "William H. Hiatt III" wrote:
> >
> > Well, as you may know, I recently got my truck dynoed. Came out to be
> > 223RWHP, but only 278TQ. That's pretty low for the mods, IMHO.
> >
>
> these really aren't HP mods, there more "mind over matter"
> mods, they do "some good".
>
> > Engine Mods:
> > 1) Flometrics 70MM TB
>
> this is equal to having a 650 Holley carb then
> switching to an 850 but using the 650 jets.
> in order for a larger TB to work properly you need
> to add a bigger injector or it will just "lean out"
> and the computer will compensate adversly.
>
> someone needs to get an intake from a multi port and
> play w/ hogging out the injector fire areas to see
> if it will make a noticable diff.
> if injector dumps into valve port in head then a port
> job would be better.
>
> *you need to be an inj. rebuilder for this one*
> I would also try machining the pintle springs a tad
> to give more lift at same pulse for an increase of
> fuel. try about .003-.005 at a time off the spring.
>
> I have an 88 w/ TBI so I cant do mine.
> these type do benefit from a lgr. port size.
>
> > 2) Intense Performance 4" Z-Tube
> > 3) 2x2.25" Magnaflow exhaust
>
> not familiar w/ these.
> w/ or w/o headers?
>
> headers were always a bolt-on HP increaser as
> long as a lgr. carb. was added. should be same
> w/ newer injection sys. as they would slightly
> makeup for the ease of flow increase w/ inj. pulse
> timing.
>
> > 4) Mike Leach PCM
> > 5) Bosch +4 4417's.
> >
> > Why such low TQ numbers? Anything I can do to help this?
> >
> > Thanks
> > william
>
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