Ok, So I have recently finished getting some stuff fixed and sorted out and up until now I have been running about 7 pounds of boost. I almost never boost much past 4500 rpms and usually never go all the way to WOT and I guess this is why the problem has never been apparent. So I turned my AEM Tru-boost up to about 12 pounds to start to tune my way to 14 or so where my power goals are. When the boost comes on it starts to pull and the gauge stays pretty steady at about 12 but the car bogs or doesn't boost smoothly throughout the rpm range. I turned to controller off which put me back to like 7.8 and it boosted fine all the way through. I figured it must be the spring (crack pressure) setting on my ebc was too low so I changed it up to what I figured would be just wastegate regulated of 7.8 psi. That didn't change anything. When the controller was set about 8 psi boost it still bogged at crack pressure of 3 and didn't do it as bad when it was at 7.8 crack pressure but still did somewhat.
So... I would like input on what could be causing my boost to be coming on like this?
I have checked:
1. Boost leaks, been a problem in the past, but recently swapped out all my clamps for t-bolts and checked my couplers/pipes. So as far as I know there are no maft based leaks.
2. Fuel pressure is set at 26 with vac connected. Running lexus/550's/walbro/12 v mod/Aeromotive AFPR (kit eliminating j tube and FPD)
3. Checked for codes and it is clear.
4. Checked throttle cable and it looks to be tight.
5. Checked timing with T1 and E1 jumped, and everything was good at 10 BDC.
I do experience some lurching/bogging when at certain throttle levels like 1/4 way and below 3 rpms, and I don't know if that is related. This is getting really annoying, even more so since I wan't to get my car up to about 14 pounds or so, so I can go get it on a dyno for a fine tune and to see what she can do.
The rest of my mods are: Rebuilt 7m, MHG, ARP Studs, Act Clutch, AEM UEGO, CT-26 57trim.
Any help, ideas, questions for further research would be great, meanwhile I will keep searching in hopes of finding a similar case.
Thanks in Advance!!
So... I would like input on what could be causing my boost to be coming on like this?
I have checked:
1. Boost leaks, been a problem in the past, but recently swapped out all my clamps for t-bolts and checked my couplers/pipes. So as far as I know there are no maft based leaks.
2. Fuel pressure is set at 26 with vac connected. Running lexus/550's/walbro/12 v mod/Aeromotive AFPR (kit eliminating j tube and FPD)
3. Checked for codes and it is clear.
4. Checked throttle cable and it looks to be tight.
5. Checked timing with T1 and E1 jumped, and everything was good at 10 BDC.
I do experience some lurching/bogging when at certain throttle levels like 1/4 way and below 3 rpms, and I don't know if that is related. This is getting really annoying, even more so since I wan't to get my car up to about 14 pounds or so, so I can go get it on a dyno for a fine tune and to see what she can do.
The rest of my mods are: Rebuilt 7m, MHG, ARP Studs, Act Clutch, AEM UEGO, CT-26 57trim.
Any help, ideas, questions for further research would be great, meanwhile I will keep searching in hopes of finding a similar case.
Thanks in Advance!!
. Should I try NGK coppers gapped to about .028 (tsrm specifies .031 but hear less is better on more boost) if so heat range 6 or 7? Plan to run 15 pounds max. Probably 350 rwhp max... if that...