Just curious about my bogging...
#1
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Just curious about my bogging...
Heres the setup again;
Gt28
Lovefab downpipe and exhaust
Begi mani
no intercooler yet/crossover pipe
Olderguy's o2 clamp (a must)
6psi / 6 degrees of base timing
(pictures at https://www.miataturbo.net/forums/showthread.php?t=4921 )
Old vortech 12 to 1 because I ran out of money. I will install a pierburg very soon and I plan on either going adjustable begi/bipes, emanage ultimate, or aem ems (if wife gets a great job). I just wanted to get the car running and carefully enjoy it before I put it away for the winter. The car has tons of power at about 5k and above. But in second gear, from boost (about 2.8k) to 5k, it just bogs really bad (no power). Once it is really warmed up, it isn't nearly as bad and seems to have power closer to about 3.8k. I am either running too rich or starving, but why is the car so powerful at high rpms and why does it get better as the car warms up?
Their hasn't been a hint of ping (cross my fingers) in this cold weather and I haven't done any high speed runs for obvious lack of fuel management issues. I also assume that any one of my three choices will fix this, but I really want to know what it is. Also, would it be safe for me to adjust the timing to 10 degrees and just not take it past 5k? (to see if it is timing related)
Gt28
Lovefab downpipe and exhaust
Begi mani
no intercooler yet/crossover pipe
Olderguy's o2 clamp (a must)
6psi / 6 degrees of base timing
(pictures at https://www.miataturbo.net/forums/showthread.php?t=4921 )
Old vortech 12 to 1 because I ran out of money. I will install a pierburg very soon and I plan on either going adjustable begi/bipes, emanage ultimate, or aem ems (if wife gets a great job). I just wanted to get the car running and carefully enjoy it before I put it away for the winter. The car has tons of power at about 5k and above. But in second gear, from boost (about 2.8k) to 5k, it just bogs really bad (no power). Once it is really warmed up, it isn't nearly as bad and seems to have power closer to about 3.8k. I am either running too rich or starving, but why is the car so powerful at high rpms and why does it get better as the car warms up?
Their hasn't been a hint of ping (cross my fingers) in this cold weather and I haven't done any high speed runs for obvious lack of fuel management issues. I also assume that any one of my three choices will fix this, but I really want to know what it is. Also, would it be safe for me to adjust the timing to 10 degrees and just not take it past 5k? (to see if it is timing related)
#3
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New colder plugs, wires have about 5k on them. I definitely need a fuel pressure gauge, but why would it run so strong at higher rpms? Fuel filter has 29k (but will be replaced with pierburg.)
#11
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Good advice everyone. The plugs have been good, no little white specks and not covered in black. I have heard that 8 to 1 is really what I need, so it probably is too rich. So the timing can't really cause the total lack of power, right? Also, how many turns should I turn the o2 clamp?
I will also pull my afr meter from my civic and give it a shot. Yes, I also want a wideband. We just got slammed with snow, about 5 inches, and its October 13!! Hopefully it will melt tomorrow. I am really curious about how the pierburg effects everything, but it will likely make it even richer. I wish I had more time and $ so I won't keep thinking about it all winter.
The water injection sounds really cool, but I can't even consider it yet until I get everything functioning smoothly. When I finally start knowing what I am doing....
I will also pull my afr meter from my civic and give it a shot. Yes, I also want a wideband. We just got slammed with snow, about 5 inches, and its October 13!! Hopefully it will melt tomorrow. I am really curious about how the pierburg effects everything, but it will likely make it even richer. I wish I had more time and $ so I won't keep thinking about it all winter.
The water injection sounds really cool, but I can't even consider it yet until I get everything functioning smoothly. When I finally start knowing what I am doing....
#12
Put a digital voltmeter from white to ground at the pressure switch. Don't try to adjust it by guessing. As you received it, it should have been around .32 volts.
Increase the voltage slightly and try it (maybe to .38 volts) at different levels. You don't want to go above Stoich, which is .47 volts.
Increase the voltage slightly and try it (maybe to .38 volts) at different levels. You don't want to go above Stoich, which is .47 volts.
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