Backpressure relief valve

[Timmay!]

hey, does anyone know if it is illegal to have a backpressure relief valve in the intake plenum? We have looked in the rules but they don't say anythin against it.

[Timmay!]

hey, does anyone know if it is illegal to have a backpressure relief valve in the intake plenum? We have looked in the rules but they don't say anythin against it.

[drivetrainUW-Platt]

hmm, sounds like an interesting concept, guess I dont fully understand why you would want one thou....dont they call it the throttle plate???

[Dan Deussen @ Weber Motor]

If you are referring to a blow-off valve, then I can tell you that you don't need one because the turbo is downstream of the throttle.

[Timmay!]

d'oh, sorry i meant a backfire pressure relief valve so you don't have flames coming out of the intake

[Ben Beacock]

Thats an interesting concept, since I've seen more than one team blow its intake off at competition.

[gug]

yeah, we blew ours off at last years fsae-a comp. due purely to bad design though, they didnt design for positive pressures in the intake.

has anyone ever seen a well designed intake blow off?

[Buckingham]

We had such a device on our 2000 car which took 2nd place. So it can be done, and it does work as a crutch for something that is already built. However, the time spent reading this post could have been more effectively used designing an intake that didn't need one.

Donavan Haidinger
Univ. of Wisconsin FSAE

[Dan Deussen @ Weber Motor]

Intake backfires will most likely occur during engine cranking with excessive spark advance. Do a search on the forum. There have been previous discussions regarding this issue.

[Denny Trimble]

Stay away from the starting fluid...