Another engine question
Thread Starter
Burning Brakes
Joined: Feb 2007
Posts: 779
Likes: 0
From: San Bruno California
Another engine question
I had a shop rebuild my motor and am nearing the 500mi mark. It's a 350/350 motor. forged 10.50 compression, comp roller tip rockers, hyd roller cam/lifters from crane dur 276/284 LSA 112*, lift .488/.509, Edelbrock Performer intake manifold, stock Qjet, Hedman headers. It idles nice and runs good. The question I have is that there just doesn't seem to be much power when I jump on it. Heck, it moved pretty good before I rebuilt the motor and that's with a near flat cam lobe. Now when I jump on it, the carb doesnt' have that screaming wide open sound. I checked and the secondary opens when I floor it. Timing is around 12*, and it's not pinging when I jump on it.
Can the distrubitor not be in right, off a tooth, timing not advanced enough? something is aloof here. There should be MORE power! Thanks, Tony
Can the distrubitor not be in right, off a tooth, timing not advanced enough? something is aloof here. There should be MORE power! Thanks, Tony
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
I doubt that it's your timing, but if you have a timing light then you should set your timing to around 12º at an idle low enough (700 or so) to disengage the mechanical advance and unplug the vacuum advance (and close the end off with a screw or nail or something). And, when you plug the vacuum line back in you should not see any increase in the timing (if you do then your idle is too high or vacuum lines incorrectly routed). When you first stomp on the pedal the vacuum should max out at something like 56º, but check that sticky thread for timing issues...lars appears to have spent considerable time and effort to gather all timing information into one place.
Thread Starter
Burning Brakes
Joined: Feb 2007
Posts: 779
Likes: 0
From: San Bruno California
My timing is around 12* and the idle is around 700rpm. The idle has a little lope to it. What if I increase the timing higher pass 12*? As long as it doesn't ping it's ok right. And what is the sticky thread? Thanks Tony
