I've talked to my parts sources and welder and should be able to have custom upper intake manifolds made for about $350. I had a pretty good reponse on these and have gotten the price down quite low for custom work. Almost half of what I originally thought. I can make them to work with every generation lower manfold and the stock throttlebodies. I've already worked out the details on a 2nd gen. n/a style and it is currently being built. Can be used with the stock tb and ecu/afm. Also in the works is one for the T-II and 3rd gens. They are designed to increase power above 4000 rpms where we all like to run anyways Below that point they will lose power. I can do them this cheap since my parts supplier and welder are good friends and are willing to work out a cheap deal. I can also do custom units like the one on my car at anyones request. If anyone is interested in details please let me know. Lowers are not available at this time but I may develop some in the future.

 

Sound good

your design has some issues
tho

The long throttle body tubing I dont like

runners are fine a round or square chamber with a plate pertruding 3 " for a Ford mustang style TB
facing towards the Driver side firewall

Like the TII upper but with longer runners and uses a
BBK or AccuFab TB upto 105mm!

 

My design has no issues! At least no negative ones. What is the problem with the long tb tubing? In reality its the same tubing that starts at the turbo goes to the front of the car, through the intercooler, and into the plenum. tb location anywhere in here does not change power levels in any way. The longer distance in my case was so the turbulence from the throttle plate would have no affect on the airflow through the plenum at anything other than full throttle.

The custom ones for sale look nothing like mine anyways. The tb does mount up to the plenum. On the n/a's the plenum is directly above the lower manifold for shorter straighter runners and the tb faces the other direction. New T-II uppers have a refined plenum shorter runners but everything still bolts in the stock location including the intercooler.

I can fab one for a 105 mm tb!

 

I'm sure your design has no flow issues

But I prefer a cleaner look

You put the TB right on the front of the engine
Maybe to use less IC piping?

Here's a Aussie manifold

Siquel 3 rotor 7.1 1/4 uses a manifold like this

Man I would love to use a 105mm accufab TB $289
with My "new to be installed T-66"

 

a manifold like that would work great imo. i think any upgraded manifold should incorporate a different lim runner design from stock cause that's where the most restriction is. even just looking at the stock lim right at the end it tapers down and has a 90 degree turn. talk about about shitty flow. that aussie manifold would be even better if it had an even larger radius turn for the runners maybe like a huge C shape.

 

Like a side draft manifold? where the champer/TB would overlap onto the top of the engine

Yea That is the design I was thinking of

Best of both world's street and track

However, If you look at Crispeed's new manifold or turbostreetfighter's they both are short and are on the side of the engine instead of on top

It's so the mixture gets to the engine faster/more direct

 

Those are both pretty. Mine wasn't done yet in those pictures.

Agreed on the lousy flow of the lower manifold. I just haven't gotten around to building one yet.

 

yeah i was thinking of something exactly like marcus's.