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Old 16-12-2018, 09:23 AM   #1
Fastorq
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Default Ram pipes , velocity stacks, air horns , etc

I think every set of Webers or Dellorto I have had with VStacks have only been 2 tall.
Other sites I use bang on about having to use the correct length ???
IMHO the correct length has always been what the manufacturer supplied (or shorter if space was an issue.)

What are the views... do different lengths make any difference.?
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Old 26-01-2019, 05:13 PM   #2
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I understand the theory a little bit but I have never personally noticed in any way the difference between no stacks, stock 2"? stack or some tall ones that were maybe 5"
Not a bean...
That said, we're massively compromised on intake length anyway and the exhaust primaries aren't ideal if you look into some of the maths, so in the scheme of things, tuning the intakes on an otherwise **** setup is futile.
If you have custom manifolds, ITBs, perfect port work, proper tuned exhaust (4-2-1?) and access to fancy software or dyno time then there are no doubt plenty of gains to be had.
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Old 31-01-2019, 05:04 PM   #3
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Get yourself a copy of 'The Scientific Design of Exhaust and Intake Systems'.
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