Boomba Racing

iTrader: (6)

Boomba Racing is proud to present our new Evo X - Ralliart Hybrid Intake Manifold.

Boomba Racing has been manufacturing a 75 mm throttle body for Evo X's for quite some time. We never could take full advantage of our throttle body because the stock intake manifold bottle necked right after the TB. The stock manifold flange could not be opened more than 65mm without compromising the manifold walls. So far there are no aftermarket intake manifolds that offer a 75 mm TB opening. We decided to solve the problem ourselves and created a hybrid manifold that has a 75 mm diameter opening but still utilizes the factory manifolds plenum and runners. We designed a special adaptor that can be welded to the stock manifold. This adaptor has a 75 mm through opening and the flange accepts a Boomba Racing 75 mm throttle body. We also have a special reducer plate that allows you to mount a stock throttle body to the Boomba Hybrid Manifold.



After the flange is welded we hand polish the internal walls to create a smooth transition from the flange to the plenum.



Now Boomba's Throttle body can help poor 4B11 breathe properly.



After installation and drivability tests we strapped our shop Evo X to the dyno and ran several tests.
First we tested a stock throttle body to establish our baseline. Next we installed a Boomba 64 mm throttle body (which is stock TB bored to 64 mm). We noticed a peak torque gain of 5ft-lb and 2 hp. Gains were consistant all the way from midrange up to red line.

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After that it was time to try Boomba Racing's 75 mm TB. We had a peak torque gain of 6 ft-lb and 15 hp. Gains were significantly higher from midrange to red line.

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Manifolds and throttle bodies are in stock available for immediate shipping.

Evo a Mula

iTrader: (10)

wow looks like i need a new intake mani and 75mm TB who wants to buy my 64mm boomba Tb its now for sale!! lol

how much for the intake manifold

Hiboost

iTrader: (9)

I like how there is no loss on the low end, and decent gains mid and top. I'll be calling you tomorrow about getting the 75mm TB on the car for sure! Oddly I already have a moddified Intake manifold in the works to use that bigger TB, I've just been pre-occupied with driving 4500 miles around the country for the One Lap event.

00EvoX

iTrader: (1)

Looks great, how much are they? And do you have any numbers on what your Intake Manifold produces over the stock manifold?

scheides

iTrader: (10)

Can you post pics of the transition down the inside please? Looks nice!

murlo26

iTrader: (9)

Damn, this looks very promising.

Do you just change the manifold to accept the larger opening? Or do you do porting of the runners and such as well?

Boomba Racing

iTrader: (6)

One more graph showing Boomba 75mm TB with our Hybrid Manifold vs Stock TB and stock manifold.
26 Hp more and HUGE improvements from midrange to the red line.

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scheides

iTrader: (10)

bump, do you have any better pics of the inlet? What other porting is done on the hybrid manifold that makes it cost $1000?


Also, have you tested this on a modded/tuned car with an aftermarket turbo? Any more info on the setup of the car that was used in the test? Stock boost, MBC, etc?

GST Motorsports

iTrader: (8)

Yea I'd like to see the before/afters on a TUNED car.

Or at least show the logged AFR/Boost between the two overlays you posted.

We all know how much power a stock untuned car can gain with just AFR and boost changes from changing intake items.

Just putting a drop-in filter or open filter on a stock untuned 2008 will show the gains you posted in post #7

You can see some of that data from two posts I made way back in 2008:

+22whp from putting filter on with no tune or other parts:
https://www.evolutionm.net/forums/ev...ing-evo-x.html

https://www.evolutionm.net/forums/ev...e-testing.html

- Bryan