Went to the dyno today and it sucked. Help please.
#21
Re: Went to the dyno today and it sucked. Help please.
Originally Posted by Koby
You never want back pressure behind a turbo. Period. Don't ------ mis-information.
#22
Re: Went to the dyno today and it sucked. Help please.
Originally Posted by wdwalker
Originally Posted by Koby
You never want back pressure behind a turbo. Period. Don't ------ mis-information.
If you put any resistance (backpressure) on the turbine, this is going to slow the rate at which it can spool. Go read some basic books on turbocharger theory. Don't even try to associate N/A cars with Turbo. You are confusing yourself and everyone else.
#23
Re: Went to the dyno today and it sucked. Help please.
Originally Posted by Koby
Originally Posted by marclar
4bangers like back pressure.
your vtec is opeining to soon causing the high velocity to drop off to soon.
that timing map listed above is kinda retarded in my opinion. when your motor is spinning at 8k rpm the timing needs to be advanced more than 20*
your vtec is opeining to soon causing the high velocity to drop off to soon.
that timing map listed above is kinda retarded in my opinion. when your motor is spinning at 8k rpm the timing needs to be advanced more than 20*
You never want back pressure behind a turbo. Period. Don't ------ mis-information.
You want exhaust velocity. :P
#25
Re: Went to the dyno today and it sucked. Help please.
Dammit! Well we replaced the plug wires, and the rotor (it was rusted). We fixed the dip and i'ts making more power with the timing fixed. It has some random misfiring like once in the pull. But it still isn't making the power it should. I'm out of ideas. And so is Matt.
#27
Re: Went to the dyno today and it sucked. Help please.
Originally Posted by Shift_Spool
Dammit! Well we replaced the plug wires, and the rotor (it was rusted). We fixed the dip and i'ts making more power with the timing fixed. It has some random misfiring like once in the pull. But it still isn't making the power it should. I'm out of ideas. And so is Matt.
check CAM timiing,
#28
Re: Went to the dyno today and it sucked. Help please.
I think the compression is fine, it's runs great when not in boost.
This is how Matt explains it
Alright we did some more tuning today and it still isn't making a difference. In fact bigwig found out how to import the p13 maps into uberdata so this time we were using actual p13 timing maps. Total timing is around 22*. We got the afr line real smooth right up around 11.7-12:1 with no dips. We even regapped the plugs(when i checked them they were at .035) down to .028. We also replaced the plug wires with ngk blues and replaced the rotar in the distributor. It is very apparent that the car is having ignition problems. There are all kinds of little misfires in the graph where it goes reads very lean for a split second that show up on some pulls and on other pulls they don't show up except for maybe 1 or 2 little misfires. I even tried adding and subtracting timing in the boost columns without much change at all. There is definintly something wrong here
This is how Matt explains it
Alright we did some more tuning today and it still isn't making a difference. In fact bigwig found out how to import the p13 maps into uberdata so this time we were using actual p13 timing maps. Total timing is around 22*. We got the afr line real smooth right up around 11.7-12:1 with no dips. We even regapped the plugs(when i checked them they were at .035) down to .028. We also replaced the plug wires with ngk blues and replaced the rotar in the distributor. It is very apparent that the car is having ignition problems. There are all kinds of little misfires in the graph where it goes reads very lean for a split second that show up on some pulls and on other pulls they don't show up except for maybe 1 or 2 little misfires. I even tried adding and subtracting timing in the boost columns without much change at all. There is definintly something wrong here
#29
Re: Went to the dyno today and it sucked. Help please.
Well I think I'm going to be replacing the wastegate beacuse it's an ssautochrome and it is now running 11 psi, and it should be around 8.5 psi. And I may replace the turbo also because it's also from an ssauto kit, and even though it says 10 psi, maybe it's crappy 10 psi. I dunno. I wanna get a bigger turbo anyways.
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