The cams do make a difference in the engine's performance. You can get
close to the HO engines performance with a programmer for the non HO
engines. (Superchips for example)
The timing curve is more aggressive in the HO engines but not a huge change
in injector PW% (fuel delivery). As for compression, you can use selective
MLS head gaskets to change compression on the engines (not by much...but it
helps - done that already on a few 4.7L's in the shop).
- Bernd
-----Original Message-----
From: Kyle Kozubal [mailto:solocamxt@sbcglobal.net]
Sent: Wednesday, October 17, 2007 8:20 PM
To: dakota-truck@dakota-truck.net
Subject: RE: DML: Many 4.7L V8 HO Conversion Questions.........
So what about the cams?
--- Ray Block <bpracing@worldnet.att.net> wrote:
>
> Now if Kyle had read the link I sent him he would
> already understand why he
> got that answer. The HO and standard 4.7 intakes
> were one and the same in
> 2003 & 2004.
>
> Also there's a lot more contributing to the HO's 30
> additional horsepower
> than just cams and intake. Things such as
> compression ratio, valve springs
> for higher rpm, air box, and PCM programming....to
> name just a few.
>
>
> > -----Original Message-----
> > From: Kyle Kozubal
> >
> > More info from Gary:
> >
> > "The HO manifold and HO cams would not be a
> worthwhile
> > investment and upgrade on your 2004 non-HO 4.7L
> motor"
> >
> > Wow.......
> >
>
>
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