New L88?

[Ethan]

----- Original Message -----
From: "Eric Bryant" <BRYANTE at ghsp.com>

<cut>

> > From: Ethan [mailto:c5efiecm at performanceresearchonline.com]
> > Subject: Re: New L88?
> >
> > You bet...and the benefits are impressive. The LS1 rods are
> > not bad at 6.1"
> > up from the Gen II SB 5.7", but we would like to see them
> > closer to 6.3",
> > along with a shorter stroke and larger bore.
>
> Larger bores slow the combustion speed and increase emissions, though.  I
> think that's the reason for not going larger on the LS1.  Obviously for us
> go-fast types, bigger bore means more room for valves.  I don't think the
> EPA sees things that way, though.  Too bad.
>

As it stands now, well over 1.1HP/IN^3, 28+MPG, and LEV designation is quite
an accomplishment for GM. Dave Hill's development philosophy is clearly
stated often that each model year will introduce significant
performance/design improvements. So far so true. They are following our lead
[the aftermarket] in the area of power, and we make around 460HP before we
stroke.

Chevy's Corvette race program developed the current 7.0L LS1 as they were
needing a way to catch the Viper effort on the straights. It seems it will
trickle to production eventually, and they will find a way to meet
emissions. We suggest they can do much more with 5.67L, perhaps in Gen IV or
V.

Interestingly, the original C5-R made over 600HP/495Ft-Lb with a 5.98L LS1
bore up from 3.90" to 4.125" and stroke down from 3.62" to 3.42". Would be
nice to see some of that trickle down to an LEV compliant engine...

Ethan Hall
Performance Research and Development, Inc.
www.performanceresearchonline.com
.



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