What about adding an extra can for vacuum something like this..Or an electric vaccum pump?
Vacuum Canisters - SummitRacing.com
I tried the vacuum canister already (that is the one that is in there) but this cam only produces 10 in/hg max at idle and lower rpm as it came out of my other race car. I thought about the electric pump but they cost too much $$$ and I don't have the room under there to mount it. The power brake booster manufacturer states that you must have a minimum of 18 in/hg for it to work correctly. The brakes worked before I put this new engine in it but now takes both feet and a prayer to stop. Thanks for the info!!
Tim
and have you tried a vacume pump?
Hey Bud,
If that cam is setup correctly and working as designed, not to mention it's setup as a track car, why not pull the M/C and booster and go with manual brakes? It seems to me, the cure is much worse than the pain.
just my 2 cents.
My 68 is my hanger queen (car show only crusier) so I would pefer power everything to get me to and from the shows in comfort. Whats odd is it worked in my 93 which has power brakes as well. I guess the newer cars require less vacuum to work?
Tim
i meant a electric pump like this.it pulls 20 in/hgYou mean as a troubleshooting tool just in case the vacuum booster is bad? No I have not as I don't have a electric vacuum pump to evacuate the AC sytem but I guess I could borrow one. I have not tried the fancy electric ones they use in drag racing as I have a Moroso 3 vane, belt driven vacuum pump on my 93 race car that works good but only pulls about 15 in/hg max.
Tim
OK Tim.
Do you know what the vacuum specs are for that cam? Most good grinders can provide that information. Mine is a custom model with a vacuum rating of 16.9. It managed to supply enough vac to power my booster, that is, when I was running pwr brakes. It just seems a shame to pull, an otherwise, "kick A", cam for something like this. Unless, it's just to rad for a "hanger" queen and you're tired of the 1500 RPM idle?
i meant a electric pump like this.it pulls 20 in/hg
SSBC 28146 - SSBC Electric Vacuum Pump Kits - Overview - SummitRacing.com
I have seen those in the catalogs but have never knew anyone that actually has tried them and also I am not a big fan of SSBC.
Tim
Yeah, can hear the damn thing chatter the relay and pump every time you hit the brakes.We have one in our street rod pickup and those damn things are noisy as hell.
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