Roller cam vacuum

[Jakke]

I have Crane cam's hydraulic roller cam in my 440. Do I get enough vacuum for my brake booster?

[dgc333]

The fact that is a roller cam has no impact on your manifold vacuum. You will need to let us know what the cams duration and lobe speration angles are.

[Jakke]

Here are some spec's for the cam

Intake @ cam 372 @ valve 558 rocker arm ratio 1.5
Exhaust @ cam 372@ valve 558

@ .050 tappet
Intake 19 BTDC 49 ABDC 105 ATDC Duration 248
Exhaust 62 BBDC 12 ATDC 115 BTDC Duration 254

[345Dart]

Originally Posted by Jakke

Here are some spec's for the cam

Intake @ cam 372 @ valve 558 rocker arm ratio 1.5
Exhaust @ cam 372@ valve 558

@ .050 tappet
Intake 19 BTDC 49 ABDC 105 ATDC Duration 248
Exhaust 62 BBDC 12 ATDC 115 BTDC Duration 254

doubt it !

[cudabob496]

I have a similar cam in my 496 Cuda, and a vacuum canister allowed the power brakes to work good.

[DartGT66]

I had a 255/265 cam in my stroker, no problems with the brakebooster. With the 283 cam I used before, there wasn't much vacuum at idle.

[cudabob496]

Before I put my vacuum canister in, I thought everything was cool with the power brakes, untill the day I had to hit the brakes twice in about 5 seconds. The second hit, there were no brakes, so the canister is good insurance.