has any one used ram air on tne 929 blade engine if yes was there much difference thanks in advance jon
Ram air only realy gets effective over 130mph,so at the low speeds your going to get upto with a 929 fireblade in a seven its not going to make a big difference like it would on a bike.
AFAIK the 929 never featured ram-air as standard.
There were a few aftermarket so-called ram air retro fits but these were generally more like cold air arrangements.
One particular race team did it properly and claimed big benefits but, as previously stated, it doesn't do much below 130mph.
Go search on google.
Geoff.
I'm with Paul
P = 0.5 rho.v.v
That is pressure increase is 0.5*densityofair(kg/m^3)*velocity(m/s)*velocity(m/s)
2.16mph = 1m/s
rho = 1.3kg/m^3 (at 0deg)
Cutting to the chase
75mph = 0.1psi
150mph = 0.4psi
I have read that a cold air feed buys much more of an improvement.
Matt
Does anyone think it possible to create a Ram air effect in the same manner that a two stroke motocross bike has a tuned pipe of varying diameters
etc?
It's something I've thought of before, but never bothered to ask, and certainly never bothered to find anything about it out myself!
wot is the air box that ab sells is it ram air or cold air intake or doz a good air filter like a k+n just works as good .jon
I wouldnt have throught so, IIRC a tuned pipe, "tunes" the effect of the exhaust sound waves to provide a stronger sucking action so it
pulls out spent gases faster and on port overlap helps suck fresh mixture in.
quote:
Originally posted by Steve Hignett
Does anyone think it possible to create a Ram air effect in the same manner that a two stroke motocross bike has a tuned pipe of varying diameters etc?
It's something I've thought of before, but never bothered to ask, and certainly never bothered to find anything about it out myself!
Hi Steve.
This "ram air" stuff was popular in the late eighties in CCC and Hot Car. I remember an article detailing how to make your own set up using
a carefully calculated diameter plastic drainpipe feeding into a sealed airbox arrangement.
All to do with standing waves and flow inertia. What???
If you were running SU's you even had to run a pipe from the now pressurised airbox to the floatbowls!
Lots of dodgy maths and anecdotal stories of significant power gains etc.
I've no doubt that the physics supports the general principle but I'm not sure it actually worked in practice.
If you succeed then let me know. We have a 929 in our Phoenix.
Geoff.
quote:
Originally posted by Steve Hignett
Does anyone think it possible to create a Ram air effect in the same manner that a two stroke motocross bike has a tuned pipe of varying diameters etc?
It's something I've thought of before, but never bothered to ask, and certainly never bothered to find anything about it out myself!