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General Category >> Rubber Side Down! >> Ram air ?
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Message started by Berzerker on 08/04/20 at 18:00:18

Title: Ram air ?
Post by Berzerker on 08/04/20 at 18:00:18

I saw on rycas new you tube post, there 10th year special addition cafe racer comes with a Ram Air intake set up. I have read a post on here about ram air, I was wondering if anyone has put a ram air on and how, also just wanted to know your guys general thoughts on it. I read on here that to much air could basically blow the gas right out the carb back up into tank, cause of the gravity feed. I like the way the ram air looks don't really care about the possible performance up grade of it. Any thoughts? Thanks.

Title: Re: Ram air ?
Post by norm92de on 08/04/20 at 20:36:16

If you can get it. Manifold pressure is manifold pressure.

The best I have been able to get is 62"of mercury, not on a motorcycle of course. It does make an enormous difference.

Title: Re: Ram air ?
Post by Dave on 08/05/20 at 03:49:24

If you include the float bowl vents into the ram air system, then the fuel/air balance will be consistent and you won't be blowing any fuel out of the float bowl or screwing up the jetting.

The only issue that may come up is the fuel delivery to the float bowl. Our system is gravity fed, and there isn't much fuel pressure as there is a very short height difference between the fuel tank and the float bowl. For water every 2.3 feet of height difference delivers 1 psi of pressure, and fuel is lighter than water so the pressure will be a bit less. I am not near my bike right now to measure - but the height difference with a full tank is probably a bit more than a foot.....and a tank that is near the fuel reserve is likely only about half a foot. The Savage is likely operating at somewhere around 0.5 - 1 psi - which is why the fuel just trickles out the fuel hose into the carb.

If you get too much ram air effect you may need to include the ram air into the fuel tank as well by getting a California fuel tank and cap that has a vent tube built into the tank and a cap without a vent.

In the end I really bet this is just a fashion statement and will offer very little performance gain on a Savage.

Title: Re: Ram air ?
Post by justin_o_guy2 on 08/07/20 at 10:02:55

The Savage is likely operating at somewhere around 0.5 - 1 psi - which is why the fuel just trickles out the fuel hose into the carb.

Which makes understanding why an inline filter can cause fuel problems a lot easier..