Jason Moyle Racing
General Category => INDUCTION => Topic started by: tinytim139 on November 06, 2012, 02:21:39 pm
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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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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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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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Criticism is wonderful.
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Days elapsed time has taught many things.
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I think it's worth it.