port injection for 4.3L V6 ?

[Cosby, Melvin C. (GEL, MSX)]

I think you are right.
Side note, they also had a counter-rotating balance 
shaft driven off the cam.

Mel

> -----Original Message-----
> From: Gonyou, Jeremy (.) [mailto:jgonyou at ford.com]
> Sent: Monday, July 16, 2001 8:17 AM
> To: 'gmecm at diy-efi.org'
> Subject: RE: port injection for 4.3L V6 ?
> 
> 
> 
> I was under the impression that the extra CPI ponies came 
> from the higher compression and vortec heads.  
> 
> -----Original Message-----
> From: ae2598 at wayne.edu [mailto:ae2598 at wayne.edu]
> Sent: Friday, July 13, 2001 2:04 PM
> To: gmecm at diy-efi.org
> Subject: Re: port injection for 4.3L V6 ?
> 
> 
> What is it about CPI that gives it that much of a HP 
> increase?  How much
> of it can be compensated for through careful tuning on the 
> TBI system?  I
> was considering going CPI with my Bravada, but the TBI system 
> is so simple
> and elegant that I really hate to replace it with anything so
> intimidating-looking :)
> 
>  On Fri, 13 Jul 2001, Charles Morgan wrote:
> 
> > Howells used to sell a kit to retrofit 4.3Ls with TBI to 
> Central Port 
> > Injection.  CPI is not really port injection, though it 
> does have pressure 
> > operated poppet valves at each port.  Horsepower is 
> increased from 160 (for 
> > TBI) to 200 and peak torque, I believe, is 260 lb ft.  CPI 
> manifolds are 
> > listed on Ebay every now-and-again--I think there's one there now.
> > 
> > Charles Morgan
> > 
> > At 11:53 PM 7/12/01 -0400, Mel wrote:
> > >I have a '90 Chevy S10 with the 4.3L V6 and TBI.
> > >It is bone stock.  After a stock rebuild, it is running well again.
> > >I believe I understand the TBI system fairly well and
> > >would like to upgrade the induction to port injection.
> > >I am looking at street use only, with the occasional tow.
> > >Would like to improve low RPM torque if possible.
> > >Does this type of retrofit even make sense?
> > >Are there any factory port injected 4.3 (or other) systems
> > >that could be retrofitted?
> > 
> > 
> > 
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