What's the ideal DCR for LSx Engines
TECH Resident
Joined: Dec 2004
Posts: 881
Likes: 1
Originally Posted by gun5l1ng3r
And a valve adjustment thing (every 10K mi?)...
In the 60s and 70s, no real high performance engine came with hydraulic lifters. My Supra TT doesn't have them either. And I believe people take them out of DOHC modular Fords also.
TECH Junkie
Joined: Dec 2005
Posts: 3,092
Likes: 11
Thanks for posting the article. Excellant read. Vizard states if you do what he says you can run a 1/2 point higher than what the chart says. Also he does not differentiate between aluminum and iron heads. Thought that was odd.
So ok.. Detonation is caused by a lot of things right? To high of a DCR with not enough octane at a high temp is one of them right. Well, what would be better for bottom end torque and shifting at say 6200-6300rpm:
Motor details:
348ci
-2cc forged pistons
Stock heads
Z06 manifolds
Lower DCR (8.0ish) running 91 octane at 180* with higher timing
or
Higher DCR (8.5ish) running 91 octane at 175* with less timing
Motor details:
348ci
-2cc forged pistons
Stock heads
Z06 manifolds
Lower DCR (8.0ish) running 91 octane at 180* with higher timing
or
Higher DCR (8.5ish) running 91 octane at 175* with less timing
