Here is some pictures of three stages of modified manifold & plenums
The shapes have been flow tested.Other copies have not been that
I know of.and track proven.
The first picture is a compairison to a stock one to perfomance tech
Stage I manifold plenum.plenum bore can be done up to 2.600.
The stock bore clean up 2.500will take .2 tenth off your 1/4 mile time,
jus by bolting on.more for the 2.600.No one will even notice this
mod ,except hard core SC people.It looks stock when painted gray.
The second picture is a Stage II manifold-plenum mod.Manifold
-plenum is modified and wet flow tested to insure a balance flow
over stock.
The third picture is a side by side compairison of a stock manifold-plenum
to a performance tech Stage I .That has been doing mods and flow work
for over 35 years.
The fourth pictue is a side by side compairison of the stock
manifold opening to the STAGE I , II manifold.
The fifth picture is a Stage III PLENUM with RAISED MANIFOLD.
With plenum Set up for a A/R blower.The m90 bolts on the STAGE III
also.The plenum IC opening is 2.800.Inside plenum has been inlarged
and shape changed to out flow any plenum ever made todate.
The stage three manifold shape is changed inside.And wet flow tetsed
to give a balanced flow to all cylinders.Stock manifold is not balanced
for even air flow to all cylinders.Performance tech is the only one that do's this,to my knowlage.
The inside shape change and port work has been done to all three Stages.
The inside of the manifold and plenums are welded inside and out.
not just one side.
CMRE makes a raised manifold,no plenum mods.And no port work.
You can see what t-bird 88 do's on his mods.And would be your best a
& most likley the only hope you would have to be able to buy one this year.
you would need to ask him this.
Performance tech is not taking any orders for
manifold & plenum mods this year.We are booked until
after next july of 2006.This is because hands down they are
the best and first complete manifold-plenum mod to be
offered to the SCers.In three different stages,for the
M90, MPII and A/R blowers.
This is the best and the only balanced flowing manifold
and plenums to be offered by way of wet flow testing.
And will broaden your rpm range.Performance tech
stage I , II ,III will out flow you stock m90 blower and IC system.
The performance tech manifold and plenums can be
purchased though XR7DAVE, SUPERCOUPE UNLIMITED
for the A/R blower and M90 to MPII blowers.
Or get ahold of T-BIRD 88 if you want yours moded sooner.
you'all just have to ask him.He do's some very nice work on
his mods he performs.
Thanks RANDY