DeTomaso Mailing List: August 98, Message #327

> 4)  Edlebrock Performer Manifolds suck - toss them in the garbage. 
Claims
> Vic had it all wrong.  While big ports into a small port may provide
added
> velocity when you need it, at the point mixture is entering the
combustion
> chamber, small ports into a large one in the head cause stalling of the
> airflow.  Claims to have evidenced their lackluster performance on lots
of
> dyno runs.  I expressed my incredulity offering half the Pantera world
> including I use the manifold.  - He stood his ground.
> 
---------------------

Edelbrock says that the Performer manifold gives extra torque up to 5500
RPM, but they don't claim to be better than the stock manifold above that
range. According to Scott, do the Performer manifolds suck only above 5500
RPM, or do they suck all the way? If they suck all the way, that means that
half of the Pantera world has waisted money only in order to lower the
performance of the cars. Any comments on this?

--------------------
> 
> 6) Strongly, very strongly recommends port plates.  Both exhaust and
intake.
> His experience on the Dyno has always shown improvements in power with
> Cleveland 4 barrel heads.  I know of others that swear by them, but, have
> sensed opposite feelings from the list.
>
---------------------

As I am ignorant concerning port plates, please forgive the following very
fundamental questions: What are port plates? What do they do? How are they
mounted? What is their approximate price? If they are mounted between the
block and the manifolds (which I guess they must be), don't they compromise
the room left for the manifolds, particularly the exhaust manifolds? And
the last question: If there are different opinions about port plates,
doesn't the dyno give the final answer?


Cristiano Rossi
thpnma 02869