it's just a six
Member
- Joined
- Dec 27, 2005
- Messages
- 537
With my Syclone, 4.3 V-6, I have been tuning for around 10.3 A/F ratio while spraying meth. I am running 25 psi , my timing is as high as 18* & am seeing as much as 5 degrees of knock @ times & then it goes away.
I am slowly increasing the timing & it really seems to like more timing, I was running just 14 * timing & currently runinng 18*.
It seems you Buick guys run 21-23* of timing on pump 93 octane w/about 24 psi.
I am thinking I could possibly get to 21 or more degrees of timing, but since I have knock in a few areas & I am running 91 octane, I am a little hesitant to increase the timing.
I think the Chevy V-6 engine in my Syclone might have a little bit better quench area than the stock Buick 3.8 heads, & might be a little bit less likely to detonate? Maybe not.
My tune is not perfect by any means.
All seems pretty good, but I am thinking it might be too rich, so I am debating on leaning out the A/F ratio & bring it closer to 10.8 or so.
I am just a little worried about getting more knock by having a leaner mixture.
Typically, you guys that have runs in the low 10's A/F ratio & have gone leaner to the upper 10's did you guys see a lot more knock?
I know I will only know when I do some more testing & tuning to actually find out what A/F & timing I can run, I just would like to hear if any of you guys have any experience sinarios I am currently dealing with.
Thank you.
I am slowly increasing the timing & it really seems to like more timing, I was running just 14 * timing & currently runinng 18*.
It seems you Buick guys run 21-23* of timing on pump 93 octane w/about 24 psi.
I am thinking I could possibly get to 21 or more degrees of timing, but since I have knock in a few areas & I am running 91 octane, I am a little hesitant to increase the timing.
I think the Chevy V-6 engine in my Syclone might have a little bit better quench area than the stock Buick 3.8 heads, & might be a little bit less likely to detonate? Maybe not.
My tune is not perfect by any means.
All seems pretty good, but I am thinking it might be too rich, so I am debating on leaning out the A/F ratio & bring it closer to 10.8 or so.
I am just a little worried about getting more knock by having a leaner mixture.
Typically, you guys that have runs in the low 10's A/F ratio & have gone leaner to the upper 10's did you guys see a lot more knock?
I know I will only know when I do some more testing & tuning to actually find out what A/F & timing I can run, I just would like to hear if any of you guys have any experience sinarios I am currently dealing with.
Thank you.