How much Timing advance?

[LXCoupeSooCrazy]

How much timing advance is everyone running with 93 octane pump gas with an Eaton and about 14psi. and typical supporting mods. Im at 19 degrees total at full throttle/load right now with my tune. Also how much with 100 octane race unleaded? Is that too conservative ?

 

[spartansnake]

yes that does seem conservative. Im at 18* 91 octane 11.80 AF 15 psi with my tune and thats really conservative. When i get some torco im gonna try 22* .Sorry i dunno if any of this helps

 

[96stanggt]

I see between 15-16psi depending on the weather and run 22* on pump 93. On my nitrous tune I run 16* timing tuned for pump 93, but when I spray I like to keep a couple gallons of 100 octane for a bit of safety. If you want to do a race tune for the 100 octane on the eaton you could bump that timing up to 24*-25*.

 

[SVTkel]

I have 23 degrees on 94 octane on my Whipple for 14 - 15 psi. Which is up there, however my afr is 11.2 at WOT.

Seems to me my ported Eaton on 2.93 had 21 degree on 93 / 94 octane.

 

[liedenfrost]

Generally, 21 or 22 degrees with a 11.5 - 12.0 AFR. Some folks will do 23 degrees of timing on 93 octane without issue as long as the AFR is not too lean.

 

[Posi]

You can do 22*'s with a safe a/f ratio pretty easy on 93 octane. Then for a race tune for high octane you could go with 23 or 24*'s.

 

[04MystiCobra]

I was very surprised to see that even though my car could run 22, it made the same numbers at 19.

 

[96stanggt]

I was very surprised to see that even though my car could run 22, it made the same numbers at 19.

You're car might not have had enough fuel for the extra power, it should have made a good bit more power with the extra 3*.

 

[jm@ReischePerf]

It's not uncommon to run 23* on 93 octane just make sure the A/F is fat, low to mid 11s.

 

[04MystiCobra]

Plenty of fuel here.
It just plain made the same #s w/ in 5 or less with less timing.
Wasnt worth all the extra timing just for <5hp

 

[IronTerp]

It's not uncommon to run 23* on 93 octane just make sure the A/F is fat, low to mid 11s.

Agree with JM here..... I ran 23 degrees for about two years on the street with 16 lbs of boost on a ported Eaton. Now with the Xcal II's multiple tune storage capability, I just run 21 degrees on the street......But have a little fun at the track with 24, and sometimes even 25 degrees on my 101 octane race tune. :banana:

And it appears that, give or take a bit, but a degree of advance timing is good for about 7-8 RWHP on an Eaton setup.........Not bad.