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Author Topic: Custom Plenum?  (Read 286 times)

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Offline tinytim139

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Custom Plenum?
« on: November 06, 2012, 02:21:39 pm »
Would it be worth making a custom inlet plenum to work with a standard digifant? Thinking of building one for better/smoother air delivery as i recon with tubing and such could build for around 50 quid. Any thoughts or ideas would be great. Engine it is for is a 1.8 stage one head with piper 270 cam (want a "nippy" reliable road car).

Thanks in advance Tim.

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Offline JMR

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Re: Custom Plenum?
« Reply #1 on: November 07, 2012, 10:33:46 am »
Hi Tim

Not really at the power level your looking at as the std plenum is fairly good, with actually little flow loss. A custom plenum will end up a very similar result for a lot of effort.

A stage one type head and Piper 270 should make around 130-135 without to much trouble on an 1800 bottom end with a decent exhaust system...closer to 140hp is possible if the airbox is modded and a tubular type manifold is used.

Peak numbers are less important really for a road engine as you want good low-mid range grunt which the above should provide.

Offline chrismc

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Re: Custom Plenum?
« Reply #2 on: November 08, 2012, 09:29:21 pm »
The level of headwork is key to releasing the power

For more mid-range the easiest 'fix' is to up the capacity- 2L block!

Flow-work, even hotter cam, 2.5" exhaust etc will all aid top end breathing & tend to make it more revvy...
1995 BB1 Honda Prelude 2.2 VTEC track hack
206BHP/153lbs/ft

2002 Accord Type-R daily driver

Offline Acezenoevo

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Re: Custom Plenum?
« Reply #3 on: April 21, 2015, 09:42:44 am »
Criticism is wonderful.

Offline Embernarn

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Re: Custom Plenum?
« Reply #4 on: May 20, 2015, 09:23:17 am »
Days elapsed time has taught many things.

Offline Bornjames

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Re: Custom Plenum?
« Reply #5 on: October 07, 2019, 11:52:46 am »
I think it's worth it.

 

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