help with intake

esgtbird said:
i am thinking about buying a modified intake from texas thunderbirds.
i was wondering if any one has bought one of these and what kind of gain they have got by putting this intake on
here is a link
http://www.sccoa.com/forums/showthread.php?t=76881

i would like to hear all the good and the bad about this intake


thanks ESGTBIRD

I did the same thing on my SC. When I dynoed found no increase in power at all. But..... my car has stock heads & cam. I have no regrets doing the mod as when my new blower is done and I installed good heads & cam it will enhance those mods and do what it is intended to do, flow more air. On a stock SC it wont show improvements simply because there are other bottle necks to address first. In the long run, if you plan for a high HP SC it is a good investment

Ken
 
The manifolds that I made,with finish shapes from flow testing.
Extended the RPM power band on a stock and modified motors.

There was a pro built flow tested developed manifolds,and
there are clones.
The flow tested shaped manifolds are no longer being made.
But I have done more testing on raised manifolds for improvments.
And now have a raised manifold shape that I am sure will improve
linear air flow from the bottom to the top of the RPM range.
On a stock motor to built motors. Using the stock castings.

The only way to build a good flowing manifold for are SC 3.8 motors.
Would be to start from scratch with sheet aluminum. I have
been working toward this design. I don't think I will be selling any,
type manifolds/plenums. Its just to much time & work,and many
problems associated with selling them.

I am sure the untested versions of manifolds/plenums will work
just fine. But don't count on a perfect balance of air flow, or
any improvment in linear air flow.The stock set up is not
balanced or flow liear air to start with,but they do work.

Thanks Randy
Randy
 
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I had a talk with a company yesturday. About having my new
design manifold/plenum casted up.

The stock shape and modified manifold ports cannot flow air
above .550 cam lift. This includes the manifolds with larger
plenums & plenum mounting flange or hole in manifold.
Plus tests have shown CFMs have fell off below what
ported heads can flow.

Working with the original designer of the raised manifold.
I have come up with a manifold mod that will flow well
over .600 lift for increased CFMs. The manifolds that
he first built would stop flowing around .540 to .550 lift
and the ones I built would flow up to .570 cam lift.
I have no idea what the other cloned manifold/plenums
flow. I would suspect well less than.550 valve lift.

So this new manifold will inable SC 3.8 engines to use
cam with lifts up to and well over .600 lifts.We have never
been able to use this high of cam lift before because
of flow restrictions in the manifold. This is why larger
cam than .550 lift have shown small advancements
in RWHP for some SC 3.8 motors..

So if final testings and the talks and cash flow work out.
You may soon see MP & his dealer network selling a
new manifold/plenum casting.Charles was the inventor
of the SC 3.8 Raised manifold.

I still need some dyno test numbers, for the prototype.
I am hoping for a 20 to 25 rwhp and rwtq increase for
a stock longblock.By just bolting on a new casted manifold/plenum.

After testing is complete, I just need to come up with
around $15000.00 to start up castings.

Thanks Randy
 
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