timing vs octane question
When going from 91oct to 93oct, what would be a good increase in timing to go with? I was thinking about 2 to 3 degrees for starters. Is there a general equation out there somewhere for general timing/octane ratio?
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Re: timing vs octane question
leave the timing alone and up the boost
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Re: timing vs octane question
Originally Posted by Zeniceguycrx
leave the timing alone and up the boost
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Re: timing vs octane question
how do you know he is boosted
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Re: timing vs octane question
if he isnt then he really needs to up the boost
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Re: timing vs octane question
by about 15psi min
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Re: timing vs octane question
this car is not boosted yet. i just moved back across the country so there is no money left for that.
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Re: timing vs octane question
If your goal is to make more power, then look else where, increasing octane and advancing timing on a stock low compression engine will do virtually nothing.
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Re: timing vs octane question
ive got a 11.5:1 ls/vtec on a 100 shot wet nitrous. its pretty well built. i just got back from a 2100 mile road trip with it.
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Re: timing vs octane question
Running PR3 pistons or aftermarket?
I've got a high compression LS/Vtec too and had both. I actually like the PR3s better than my SRPs. |
Re: timing vs octane question
Ive got Wiseco's. No problems yet.
My car was tuned with 91 but I no longer have that option where im living now. Its either 89 or 93. It was a conservitave tune on the 91 so Im sure Ill be safe with a bit of timing increase. I was just looking for a bit of confirmation. |
Re: timing vs octane question
I honestly wouldn't touch the timing if you're only jumping to 93 octane. If you were going to run 100+ octane all the time then you could strap it on a dyno and advance some timing, but keep in mind pump gas does tend to vary a bit so tuning timing to the edge is really not a good idea.
For that reason I'm leaning more towards running my ls/vtec build at a conservative 10:1 compression, that way I can increase timing near the base and a bit through the top rpm to increase the torque curve a little more along the bottom rpm range and keep it singing through the rest of the rpm band. Boost tuning is just like high c/r tuning (with of course the exception that boost compression varies throughout) in the effect that the higher the c/r (static or otherwise), the less timing you want. Increasing timing also increases temp, which also aids in detonation. Just some food for thought. ;) |
Re: timing vs octane question
ill push you dizzy to the fire wall for free ;) 2-3 degrees would prolly be fine but your not going to really gain a whole lot and prolly not worth the time to tune it
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