Strombergs, foam filters and ram pipes

[661]

The old foam filter is falling apart. It's a pipercross and I suspect I shall have to get a new back plate too and start again as it's so old ( Pat Thomas relic)
I'm not going down the box and trunking route, have called Kelsports and await their reply, so I ask;
Any recent foam filter purchases?
Do the Strombergs prefer a small trumpet?


I thank you.

[nmauduit]

if the trumpets do not have sufficient free space around them (like in an enclosure), I doubt the small difference their length would make on a street engine would be perceptible. Rather than aiming at tuning the pressure wave, I would only aim at getting the best flow when selecting the foam in this situation.

[Andy8421]

if the trumpets do not have sufficient free space around them (like in an enclosure), I doubt the small difference their length would make on a street engine would be perceptible. Rather than aiming at tuning the pressure wave, I would only aim at getting the best flow when selecting the foam in this situation.

The effect of tuning induction length on siamesed ports is far less than a head with one port per cylinder, so ram pipe length is less likely to have a significant effect on a Stromberg head. As mentioned above, its more about a decent flow rather than harmonic tuning.

Each to their own, but Mr Chapman thought it worth the extra expense of an air box and trunking to pick up cold (relatively) high pressure air from in front of the radiator.

[deryck]

Hi Graeme

Let me know by email what you need and ill sort FOC if still available,

pipercoss is in our group
hope thats of help

best regards
Deryck


[email protected]

[661]

Amazing, thank you.Unsurprisingly, you have email!