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Topic: Custom Plenum? (Read 353 times)
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tinytim139
Newbie
Posts: 3
Welcome to the JMR forum.
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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JMR
Sr. Member
Posts: 325
Welcome to the JMR forum.
Location: Plymouth / Saltash-Cornwall
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.
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chrismc
Jr. Member
Posts: 76
Welcome to the JMR forum.
Location: Highworth, Wilts
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...
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1995 BB1 Honda Prelude 2.2 VTEC track hack
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Acezenoevo
Newbie
Posts: 2
Welcome to the JMR forum.
Re: Custom Plenum?
«
Reply #3
on:
April 21, 2015, 09:42:44 am »
Criticism is wonderful.
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Embernarn
Newbie
Posts: 2
Re: Custom Plenum?
«
Reply #4
on:
May 20, 2015, 09:23:17 am »
Days elapsed time has taught many things.
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gclub
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Bornjames
Newbie
Posts: 1
Welcome to the JMR forum.
Re: Custom Plenum?
«
Reply #5
on:
October 07, 2019, 11:52:46 am »
I think it's worth it.
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