Timing on low CR engines for boost
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From: Coastal Mississippi
Timing on low CR engines for boost What are you guys doing to compensate for the lost cylinder pressures when out of boost? Stock timing tables, or adding timing out of boost?
Would adding timing help bring boost in sooner?
Another note: Why do most not mention CR or timing when posting dyno numbers?
Would adding timing help bring boost in sooner?
Another note: Why do most not mention CR or timing when posting dyno numbers?
9 Second Club
Joined: Nov 2003
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From: Norn Iron
To compensate ?
You tune exactly the same way on the dyno regardless of CR. So there is no "compensation", only optimisation for each setup.
You say adding timing...but adding compared to what ?
You tune exactly the same way on the dyno regardless of CR. So there is no "compensation", only optimisation for each setup.
You say adding timing...but adding compared to what ?
Think he means compared to a stock higher compression motor, but I agree with Stevie, see what the motor likes. Start with stick out of boost and work from there. Obviously in boost will be vastly different.
I just got my 10.2:1 LS3 running. Ported LSA heads and a Ti trim blower. I'm seeing 12psi and so far I have 18* of timing in it with zero knock. 91 octane and a dual nozzle meth kit. 10.5:1 AFR. It's 17* from 2800-5200 then 18* the rest of the way up to 7000. I'll keep bumping it up slowly until I either blow the tires off in third gear or I start seeing KR.
Last edited by TurboAv; Jun 13, 2014 at 04:17 PM.
When you can get a pretty decent intercooler kit for like $250 that will work, I just see no reason NOT to run one. It really doesn't add a ton of complexity to the build and will help out. I went with a frozen boost A2W intercooler and have around $500 in my kit for something that the supra guys have been using for over 1000 hp reliably.
