Time For A New Intake Manifold. Recommendations?

[Jap_Muscle]

I think you were apart of the original discussion about Multi vs Single throttles when i googled some old threads on SAU. The car isnt a circuit car and its main purpose is being a street car. And setup for straight line performance. Because of this i always assumed Single > Multi. I also found this while going through old threads.

I am also building a Rb30/26. I have asked Nathan from HiOctane which Hyper tune Plenum would suit....here is the correspondence

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Hi Matt,

It depends what you are using the car for. If you are using it for street use then yes they are good(6throttle Hypertune). However if you are just going for outright power then you are better off with a single throttle plenum.

What size did you need those pistons in?

Regards,

Nathan Welland

Sales And Marketing

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I use the car for street and track days, The drag strip in Adelaide is closed

I am a firm believer in achieving maximum average power and torque.

What gains will the 6 throttle plenum achieve at my target power/Flow?

Matt

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Hey Matt,

The plenum itself does make more power than the standard one. Once you reach over 400kw atw it is no longer the plenum that becomes the restriction it is the throttle bodies. The 6 throttle is better for over all response not maximum power figures.

Regards,

Nathan Welland

Sales And Marketing

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Hmmmmn, That's hard to believe since the combined area of the 6 butterflies minus the shaft is still more than the single TB. I guess the extra turbulence caused at the inlet causes the issue.

So you would say.

6 TB Plenum for GT-SS, 2530, GT2860R-5

Single TB Plenum for Big Singles

I guess I'm right on the line.......I think the 3ltr will give pretty decent response so very hard to say which will make more average power....

hmmmn

Matt

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Oh sorry I didn't realise you are running a 3L ( now that I look back over the emails I see you did say 30/26 ) On a 3L the multi throttle is not worth it single all the way. We are using a single on our new R34 race car which is a 3L.

Regards,

Nathan Welland

Sales And Marketing

We did pressure test the throttles and there was some hissing around the throttle bodies. We couldnt determine exactly if it was the bearings or the actual flaps but since it was out we decided to clean everything up and replace the bearing seals as well.

[Jap_Muscle]

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Edited September 28, 2011 by Jap_Muscle