Turbos Not Making Boost...Ideas? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

kpwalls06 · 07-21-2015, 03:05 PM

Here's the background.
-418ci LS3, 9.6:1 CR, FAST 102 Intake Manifold
-AGP TT Kit, w/ Precision 58/62 Turbos
-Fore Precision Twin Pump Fuel System w/ ID1000's

I bought an AGP TT kit direct from them a little over a year ago, and did the install shortly after, with a fuel kit from Fore Precision as well, and an AEM TruBoost. The car starts and runs just like it did before, but it won't make any boost when under throttle. When I say no boost, I mean none. Not once have I seen the TruBoost display positive numbers, I've data-logged multiple times with HPTuners, and not once has the MAP gone above atmospheric. The highest I've seen is 14.5psi/100kpa (absolute). Even if I run the car in 2nd gear up to 4500rpm, it still shows vacuum on the TruBoost and in HPTuners. Has anyone seen this before? I can't really start tuning until I get this part figured out, and I would really appreciate any help!

LTRS777 · 07-21-2015, 03:11 PM

too loose a spring on the wastegate? wastegate DC left open? air leak (can you hear the turbos spool and it still not making boost)?

you are running a MAP sensor that can read more than 1bar right?

kpwalls06 · 07-21-2015, 03:17 PM

I'm running the ZR1 MAP sensor, I have 8lb springs in the wastegate's. I'm thinking air leak, because I can hear the turbos spooling, but I've checked the charge-air system three times since install, and I haven't found anything yet.

LTRS777 · 07-21-2015, 03:20 PM

Quote:

Originally Posted by kpwalls06

I'm running the ZR1 MAP sensor, I have 8lb springs in the wastegate's. I'm thinking air leak, because I can hear the turbos spooling, but I've checked the charge-air system three times since install, and I haven't found anything yet.

Build ya a pressure testing system (PCV pipe, Bike check valve, air pump - manual or electric). As soon as you put pressure to it, it should sing for ya. If that's not it, check how your wastegates are plummed to ensure its not forcing them immediately open. That's a whole lotta engine, regardless of spring size, to have 0 boost. Good luck!

1KillerSS · 07-21-2015, 03:21 PM

I'm sure you have done this, but check all your intake piping, 9 times out of 10 the clamp let go, from not being tightened down all the way.

kpwalls06 · 07-21-2015, 03:35 PM

I've checked all the intake piping, and I can't find any boots that have moved, or any clamps that have moved either.

Unreal · 07-21-2015, 04:13 PM

Tune adjusted for the settings of a zr1 sensor?

Didn't leave a rag in the intercooler or something? BOV on and seated correctly? Didn't leave the oring out? Same with wastegates, didn't leave springs or something out?

AITI · 07-21-2015, 04:16 PM

Also after all listed above, take inlet coupler off and inspect turbine blades to make sure something didn't take them out.

Unreal · 07-21-2015, 04:20 PM

Things like that, you would still get some boost unless they weren't even there. Plus it would be making nasty noises.

Pull the fast apart too and inspect it. Or at least boost check it. Seen WAY WAY WAY too many of them blow apart. I would pull it off and put a stock intake back on ASAP as it will only cause issues later.

kpwalls06 · 07-21-2015, 05:26 PM

Thanks for all the suggestions guys, I really appreciate it!

Unreal, how would I check that the tune was adjusted for the ZR1 sensor? Matt from FSP set me up with the base tune, since I ordered most of my parts through him, and I'm sure he would've done this, but I'll check it anyway.

I'm gonna start with the pressure check to see if that yields anything. I had the intake apart when I put the TT kit and fuel system on, and it was all ok.

I've also checked the compressors for damage, nothing there, and the turbos spool up under acceleration, I can hear that. It never shows boost, and I don't ever hear the BOV when I left off the throttle.

No nasty noises coming from the car, it sounds roughly the same as before, save for the turbo wine when they spool, and slightly quieter exhaust.

Unreal · 07-21-2015, 05:29 PM

Check to make sure BOV is hooked up and spring is in it. Same with wastegates. Make sure wastegates have the valve seats in them, but you would hear a leak so I doubt it is that.

Unless you told Matt you swapped sensors he wouldn't have adjusted that. Open your HP tuner file and look at the map sensor settings.

linear 312.50
offset -11.25

kpwalls06 · 07-21-2015, 05:37 PM

BOV is hooked up, and I made sure the spring was in before I installed it, same with the wasgtegates. Also, with the car running at idle, the wastegates don't have any exhaust coming out of the dump tubes. Since they hang upside down, if there were no springs, it would be dumping through there constantly.

Yeah, Matt and I had discussed all of my mods before I ordered anything, and he's the one that turned me on to the AGP setup, and helped me get everything else.

I checked the tune Matt gave, it's got the same linear and offset values you posted, so that's good.

Unreal · 07-21-2015, 05:41 PM

Leak check the system. I've seen the fast oring between the shells blow out easy enough. Wouldn't be surprised if there is a huge leak in the system from something like that.

kpwalls06 · 07-21-2015, 06:01 PM

I'll leak check it as soon as I can in the morning, and hopefully get it figured out then.

07-21-2015, 03:05 PM	#1
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	Turbos Not Making Boost...Ideas? Here's the background. -418ci LS3, 9.6:1 CR, FAST 102 Intake Manifold -AGP TT Kit, w/ Precision 58/62 Turbos -Fore Precision Twin Pump Fuel System w/ ID1000's I bought an AGP TT kit direct from them a little over a year ago, and did the install shortly after, with a fuel kit from Fore Precision as well, and an AEM TruBoost. The car starts and runs just like it did before, but it won't make any boost when under throttle. When I say no boost, I mean none. Not once have I seen the TruBoost display positive numbers, I've data-logged multiple times with HPTuners, and not once has the MAP gone above atmospheric. The highest I've seen is 14.5psi/100kpa (absolute). Even if I run the car in 2nd gear up to 4500rpm, it still shows vacuum on the TruBoost and in HPTuners. Has anyone seen this before? I can't really start tuning until I get this part figured out, and I would really appreciate any help!

07-21-2015, 03:11 PM	#2
LTRS777 Drives: 2014 Saleen 620 White Label #14-011 Join Date: Dec 2014 Location: AL Posts: 610	too loose a spring on the wastegate? wastegate DC left open? air leak (can you hear the turbos spool and it still not making boost)? you are running a MAP sensor that can read more than 1bar right? __________________ '14 Saleen 620 White Label #14-011 ADM LSA Stage 1 Kit, ADM 2.75 Pulley, DEKA 63lb injectors, ZL1 Fuel Pump, JLT 123MM Big Mouth intake, TSP 2" LTHs, BW TB, 2.5" Catback, Scott Culbert/GEN3PERF tuned! 573WHP/557WTQ @ 10psi. Build Thread Here: http://www.camaro5.com/forums/showthread.php?t=390708

07-21-2015, 03:21 PM	#5
1KillerSS Too much is never enough! Drives: AGP TT SS [COTW] 4/20/15 Join Date: Feb 2014 Location: Toledo,OH Posts: 4,149 View My Garage	I'm sure you have done this, but check all your intake piping, 9 times out of 10 the clamp let go, from not being tightened down all the way. __________________ AGP TT kit, 54/57 Forged rotating assembly, Custom grind cam... Dual nozzle meth, ID850's, Livernois dual fuel pumps, ECS BAP, 25% UDP, 3 inch Magnaflow catback with X pipe, Mantic 9000 clutch, DSS 1000hp axles, DSS aluminum driveshaft, ZL1 rear end, solid subframe bushings, HE differential offset bushings, BMR Trailing arm, BMR toe rods, Lingenfelter LNC-2000,SJM Line Lock. 747 whp 714wtq *Build thread* http://www.camaro5.com/forums/showth...55#post8107855

07-21-2015, 04:13 PM	#7
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Tune adjusted for the settings of a zr1 sensor? Didn't leave a rag in the intercooler or something? BOV on and seated correctly? Didn't leave the oring out? Same with wastegates, didn't leave springs or something out? __________________ Nick Corvette Z06 -1200ish rwhp

07-21-2015, 04:20 PM	#9
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Things like that, you would still get some boost unless they weren't even there. Plus it would be making nasty noises. Pull the fast apart too and inspect it. Or at least boost check it. Seen WAY WAY WAY too many of them blow apart. I would pull it off and put a stock intake back on ASAP as it will only cause issues later. __________________ Nick Corvette Z06 -1200ish rwhp

07-21-2015, 03:17 PM	#3
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	I'm running the ZR1 MAP sensor, I have 8lb springs in the wastegate's. I'm thinking air leak, because I can hear the turbos spooling, but I've checked the charge-air system three times since install, and I haven't found anything yet.

07-21-2015, 03:35 PM	#6
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	I've checked all the intake piping, and I can't find any boots that have moved, or any clamps that have moved either.

07-21-2015, 04:16 PM	#8
AITI Account Suspended Drives: 2015 LFX Auto Join Date: Apr 2015 Location: US of A Posts: 280	Also after all listed above, take inlet coupler off and inspect turbine blades to make sure something didn't take them out.

07-21-2015, 05:26 PM	#10
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	Thanks for all the suggestions guys, I really appreciate it! Unreal, how would I check that the tune was adjusted for the ZR1 sensor? Matt from FSP set me up with the base tune, since I ordered most of my parts through him, and I'm sure he would've done this, but I'll check it anyway. I'm gonna start with the pressure check to see if that yields anything. I had the intake apart when I put the TT kit and fuel system on, and it was all ok. I've also checked the compressors for damage, nothing there, and the turbos spool up under acceleration, I can hear that. It never shows boost, and I don't ever hear the BOV when I left off the throttle. No nasty noises coming from the car, it sounds roughly the same as before, save for the turbo wine when they spool, and slightly quieter exhaust.

07-21-2015, 05:29 PM	#11
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Check to make sure BOV is hooked up and spring is in it. Same with wastegates. Make sure wastegates have the valve seats in them, but you would hear a leak so I doubt it is that. Unless you told Matt you swapped sensors he wouldn't have adjusted that. Open your HP tuner file and look at the map sensor settings. linear 312.50 offset -11.25 __________________ Nick Corvette Z06 -1200ish rwhp

07-21-2015, 05:37 PM	#12
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	BOV is hooked up, and I made sure the spring was in before I installed it, same with the wasgtegates. Also, with the car running at idle, the wastegates don't have any exhaust coming out of the dump tubes. Since they hang upside down, if there were no springs, it would be dumping through there constantly. Yeah, Matt and I had discussed all of my mods before I ordered anything, and he's the one that turned me on to the AGP setup, and helped me get everything else. I checked the tune Matt gave, it's got the same linear and offset values you posted, so that's good.

07-21-2015, 05:41 PM	#13
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Leak check the system. I've seen the fast oring between the shells blow out easy enough. Wouldn't be surprised if there is a huge leak in the system from something like that. __________________ Nick Corvette Z06 -1200ish rwhp

07-21-2015, 06:01 PM	#14
kpwalls06 Cory Drives: 2010 Camaro 2SS/RS M6; Join Date: Nov 2009 Location: Carrollton, Tx Posts: 299 View My Garage	I'll leak check it as soon as I can in the morning, and hopefully get it figured out then.