Need tuning tips again.

EricM

EricM

Administrator
Staff member
If you are using alcohol injection, it's not uncommon for the A/F to dip down into that range when the alky starts spraying. But then it should lean back out as the boost comes up higher. Typically we shoot for 10.5-11.0 range give or take.
 
7

707V6BUICKMAN

Member
Last night I did maybe passes they were good minimal knock till like end of third gear then started to get Detonation I guess maybe trannys not shifting to fourth maybe it's staying in third to long because once I let off and it shift it's fine. But still not in 10.5-11 yet what can I do to bring # up adjust fuel psi at the regulator, or chip I lowered over all WOT to I think 114
 
EricM

EricM

Administrator
Staff member
If you are talking about timing at full throttle, it's written on the chip. Most of my alky chips are 23*/21* for timing.

Your chip was set up with enough fuel for up to 25psi, so when running 20psi it might be on the rich side. So you can keep reducing fuel or reduce alky a little bit (as long as it doesn't knock).
 
7

707V6BUICKMAN

Member
Yeah tried I am still getting knock I'm gonna try to set it at 25 and go from there. If I get knock what would be safe amount to reduce timing Thanks do much for the help Eric.
 
EricM

EricM

Administrator
Staff member
There is no safety concern when lowering timing. I usually do 2 degrees at a time to see a difference

As far as water/alcohol, I calibrate the chips assuming 100% alcohol, but you can certainly try a 50/50 mix and see how it goes.
 
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