Vacuum Canister

[bmason357]

Hi Everyone,
Is there a expert on engine vacuum here? I have a 396 Big Block Chevy engine with a Isky racing cam .262 .488 (262 supercam pn:396262). How do i install the vacuum canister?
Thanks,,

[silicon212]

Originally Posted by bmason357

Hi Everyone,
Is there a expert on engine vacuum here? I have a 396 Big Block Chevy engine with a Isky racing cam .262 .488 (262 supercam pn:396262). How do i install the vacuum canister?
Thanks,,

Is the 262 duration 'advertised', or measured at .05" lift? If it's at .05", that's pretty radical if the lobe center angle is narrower than about 114 degrees and your engine will not develop vacuum to speak of (not enough to run power accessories). If it's advertised duration, you might be OK. In the case of the former, a canister isn't going to help - you'll need a pump and canister combo.

Generally, you would have a canister and check valve - the check valve will be installed as to allow flow into the manifold, but not out of it (which would render the canister useless). The valve goes between the canister and intake - like the check valve on your brake booster.

An alternative would be to replace the vacuum brake booster with a hydraulic unit - found in some trucks and cars. The hydraulic setup runs from your power steering pump and will require the associated plumbing. You can get this from a junkyard if you so desire.

[bmason357]

Originally Posted by silicon212

Is the 262 duration 'advertised', or measured at .05" lift? If it's at .05", that's pretty radical if the lobe center angle is narrower than about 114 degrees and your engine will not develop vacuum to speak of (not enough to run power accessories). If it's advertised duration, you might be OK. In the case of the former, a canister isn't going to help - you'll need a pump and canister combo.

Generally, you would have a canister and check valve - the check valve will be installed as to allow flow into the manifold, but not out of it (which would render the canister useless). The valve goes between the canister and intake - like the check valve on your brake booster.

An alternative would be to replace the vacuum brake booster with a hydraulic unit - found in some trucks and cars. The hydraulic setup runs from your power steering pump and will require the associated plumbing. You can get this from a junkyard if you so desire.

you can see the cam @www.iskycams.com PN:396262 (262 supercam) i surely would appreciate it if you could help..