Another reply from Steve on the subject. Starting to sound grim for this idea:
Steve,
> Excellent reply! Not exactly what I'd hoped to hear, but what you report is
> logical.
> Fuel delivery would be a problem...certainly don't want any leaner mixture.
> Agreed.
> SC fuel distributor and WUR could be done? That might work nicely, but up
> goes
> the cost. SC cams...what about pistons with this setup? Could you or would
> you
> go as high as 9.5:1?
>
The only way you get 9.5:1 with a 2.7 is with custom JE pistons. You cannot run
those in an Alusil bore so one would need to either bore and replate with
Nikasil, use perfect used 90mm Nikasil cylinders, or bore to 92mm and use a
custom set of 92mm JE's. We've done al of these,....
>
> I certainly wouldn't hold you to this estimate, but what would be your
> ballpark
> for this engine, sc fuel distr/WUR, sc cams, higher compression
> pistons/rings,
> new rockers? I've got the 8:1 150 hp at the crank stock 2.7 now. Really want
> to keep the CIS, it's a daily driver, not a track car (this is Arkansas - no
> track
).
> Only am really exploring options that keep the CIS in the picture.
> Thanks!
> Ryan
>
With the 150 HP 2.7, the benefits of SC cams are nil, unless you equip your
engine with all of the 175 HP pieces: heads, intake manifold, airbox, etc. This
is now getting spendy and IMHO, just not worth it. Its FAR more cost-effective
to install a good SC motor and bolt on your SSI's an a good sport muffler.
I've done this exercise so many times over the past 20+ years and the results
are always the same. One can either make a 2.7 RS clone of some kind, or install
a 3.0 SC or 3.2 Carrera for great drivability and longevity (with good oil
cooling).
--
Steve Weiner
Rennsport Systems
Portland, Oregon
503.244.0990
E-mail:
porsche@rennsportsystems.com
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