Which Intake

[DC Smith]

Frederic Breitwieser wrote:
> 
> > concern is where the throttle blades are located. The turbo will quickly lose
> > rpm with the blades after the turbo. To counter act that condition  a relief
> 
> But, if you place the throttle blades BEFORE the fresh air
> side of the turbos, for a few seconds anyway, the turbo will
> keep pressurizing the plenum while creating a vaccum on the
> pre-turbo side... thus giving you less throttle reponse when
> you let up on the gas pedal.


 Don't you want less throttle response when you let up? (sorry, Fred..
couldn't help it on that one) Vacuum is good. <grin>

>  Most OEMs, as far as I can
> tell, place the throttle plates after the turbo, and I
> copied this on my twin-turbo setup, with two throttle
> assemblies.

 I can't vouch for what most OEM's did or didn't do, but I can tell ya
what GM did on the Buicks. (I know the carbed cars had it before the
turbo) The 84/5 non-intercooled turbo cars had the throttle body before
the turbo. Maybe it's just me, but I feel that the vacuum caused when
closing the throttle quickly, is actually is easier on the turbo than
the "fart" caused when hammering the throttle shut, with the TB after
the turbo . (such as my car does now) I do feel that the non-intercooled
car's turbo's lasted longer, due to this design. No air (vacuum) =
nothing to hammer the bearings.
 No matter what way it's done, they both have their advantages /
disadvantages on different buildups. 
 Either way works quite well. IMO :)


***********************************************************************
Dan Smith      84 Regal   12.13 at 112     GSCA# 1459
St.Charles, Missouri 
mailto:dcsmith at bytes.net               
mailto:dcsmith at gnttype.org
mailto:morepoweral at bytes.net
mailto:morepoweral at gnttype.org
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