Quote:
Originally Posted by Steve C.
Here is a Bullet hydraulic roller lobe that is the same as the Old Faithful but with more lift....
HR288/390
288
236
160
.3900
Us it on the intake side. Then pick a exhaust lobe that suits the exhaust-to-intake ratio on the specific cylinder heads in use and/or the cars exhaust system in use, be it 4,6,8 additional degrees duration, or none..
Then it could be ground with any lobe separation desired. Now the question would be.... do they have on hand blank billet cam cores.
https://www.bulletcams.com/Masters/HRlobes.htm
Ask for Tim Goolsby
. |
Here's a question for you. I'm picking a cam for my street 494 ci motor and SD CNC RP eddy heads., here are the flow numbers and E/I ratios.
Lift (in) Intake Exhaust E/I
0.10 76.20 68.80 0.90
0.20 150.80 124.60 0.83
0.30 209.90 169.70 0.81
0.40 265.20 208.10 0.78
0.50 309.90 231.20 0.75
0.60 330.70 242.20 0.73
0.70 334.70 248.40 0.74
I was intending on running the OF with 3122B/3120B lobes with 1.65 rockers, but I'm thinking I don't need that much extra exhaust duration given the E/I ratios. My max lift Is 0.640".
__________________
1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule.
Last edited by AG; 04-25-2021 at 12:49 PM.
Reason: change attachment
|