Speaking of test pipes, do you guys running them get popping noises when under vacuum?
01-20-2005, 08:20 PM
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Speaking of test pipes, do you guys running them get popping noises when under vacuum?
I notice when I cruise down a hill or to a stop in gear (so pretty much max vacuum), I get a fair amount of pops and gurgles. I've also have a backfire-esquue pop after a hard gear run up (probably throwing flames). Is this all normal? I'll retune tomorrow for a bit and make sure the mixture is good...
01-20-2005, 08:39 PM
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Ok, maybe I'll go tuning right now - couple of quick questions...
Last time I was tuning I basically set the boost at 1.25 bar with the MBC, then played with either fueling or timing until things looked decent. Does that sound like a decent method? Also, if I get decent O2 readings on acceleration and normal driving, but high right after lift, do I need to turn down deceleration fuel?
I think right now my accel. fuel is 110%, and primary is 102%. Don't know why, O2's were still decent there (Moss did the 110%, so it's probably a good value).
I think right now my accel. fuel is 110%, and primary is 102%. Don't know why, O2's were still decent there (Moss did the 110%, so it's probably a good value).
01-20-2005, 08:45 PM
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Yes, decent method. Yes to reducing decel.
I'm sure Moss had a reason for doing whatever he did. What that reason is, I can't seem to figure that out. I must be missing something.... doesn't seem like it was necessary if you are seeing .87-.9 02 voltages and experiencing quite a bit of popping/burbling.
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01-20-2005, 08:46 PM
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I think he was trying to reduce knock - I can't figure out why I still have some higher knock
I guess once Jason gets his dyno we'll do some tuning and get to the bottom of it.
01-20-2005, 08:48 PM
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Anyone near you have ECUx? Would love to see CF, timing retard, KV, timing, boost, 02 voltages.
I'm sure if I was looking at it, I'd think of other variables too.
On the topic of ECUx, I am very intimidated after reading Mark P's post on it. I have yet to use it, but it seems a lot more complicated than I thought it would be? LOL, I'm such a lazy ***!
On the topic of ECUx, I am very intimidated after reading Mark P's post on it. I have yet to use it, but it seems a lot more complicated than I thought it would be? LOL, I'm such a lazy ***!