on 5/13/00 5:27 AM, Bernd D. Ratsch at bernd@texas.net wrote:
> Then please enlighten us to why you don't see Superchargers with 12psi on a
> street vehicle but yet you can crank up a Turbo to 15+ without any problems.
Isn't that what I said? I was just stating that 12psi is 12psi from a belt
driven blower or exhaust driven turbocharger. Positive manifold pressure
either way. The only difference would be how the power would come on, and
then I could not be sure how much different it would be between a
centrifugal supercharger and a turbo. And as far as seeing 15+psi from a
street vehicle, you don't see that without low compression, intercooling,
timing retardation, o-ringed heads, etc...... Yes, you will see cars come
from the factory with 14-17psi, but if you compare engine specs on the turbo
model with the non-turbo model, you will see lower compression at the very
least. Usually you will also see intake charge cooling
(intercooling/aftercooling) to combat pre-ignition/detonation. My 86 Toyota
Turbo P/U ran 7.0-1 compression, yet the standard EFI P/U ran somewhere
around 8.5-1 or 9.0-1. And that was with only 5-7psi boost.
> There is an answer...it's easy.
And, if it is so easy, why isn't everyone doing it (short of smog laws)?
Dropping a belt driven blower on top of a motor is a rather simple job, when
compared to fabricating exhaust and intake plumbing, and running pressurized
oil to the turbo bearing, not to mention finding space under the hood of a
modern vehicle to put a DAMN hot turbocharger. Personally, I would rather
run the turbo, since there would be no drive belt loss. That is the only
place that I could see boost being different between the two. You could be
right in that sense.
> - Bernd
>
>
> -----Original Message-----
> From: owner-dakota-truck@buffnet.net
> To: dakota-truck@buffnet.net
> Subject: Re: DML: RE: Re: ATI Supercharger Kit
>
> 12psi is 12psi.......may come on at a different RPM, but it is still 12 psi.
> I have never dealt with a centrifugal supercharger, but I would assume that
> it would act a bit like a turbo, since it relies on engine RPM for boost.
> Now if it direct drive, then ignore that last sentence.
----------And yes, the twin
> turbo system can make a LOT more than 12psi (with correct engine mods and
> intercooling.) The only thing that would keep me from going the turbo route
> would be the screwed up smog laws in this state (Cal). Just my .02.
>
> on 5/12/00 4:33 PM, Bernd D. Ratsch at bernd@texas.net wrote:
>
>> But the end result from 12psi on a blower isn't the same as 12psi on a
>> turbo.
>>
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:51:18 EDT