Boost+shitty tune=BOOM - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

IKILLEDSUPERMAN_ZL1 · 08-20-2021, 01:33 PM

Yeah it does suck. On a positive note the machine shop is making progress on the new block and I'll be ordering pistons and rods soon.

FrankT · 08-21-2021, 11:44 AM

FWIW, my Huron twin turbo car can't run any more than 12 degrees under boost without some KR creeping in. This is on 93 pump gas. But, I'll trade timing for boost any day.

gunchamp · 08-23-2021, 11:46 AM

Quote:

Originally Posted by FrankT

FWIW, my Huron twin turbo car can't run any more than 12 degrees under boost without some KR creeping in. This is on 93 pump gas. But, I'll trade timing for boost any day.

What level of boost do you start seeing knock?

RealQuick · 08-23-2021, 12:41 PM

Quote:

Originally Posted by FrankT

FWIW, my Huron twin turbo car can't run any more than 12 degrees under boost without some KR creeping in. This is on 93 pump gas. But, I'll trade timing for boost any day.

straight 93 (no meth)?

Greenhornet2 · 08-23-2021, 03:00 PM

Well I hope you go to a different tuner on the new engine.

eLeSthree · 08-24-2021, 05:15 AM

Quote:

Originally Posted by IKILLEDSUPERMAN_ZL1

The tune I had is definitely suspect. So after showing the tuner what others had concerns about with his tune he still says his tune wasnt the cause and it had no more then 15 degrees under boost. I mentioned that a SBE with low boost with my mods usually doesn't spit out rods unless the tune was jacked up.

So was it 21 degrees or 15 degrees? Also, did your tuner know you flashed your FPCM after you had it tuned?? Did you change anything else after the tune?

Like other people have said, usually a poor tune shows itself with chipped/broken pistons or popped head gaskets, not rods through blocks.

Did you pay for trans tuning?

[I realize the OP just wants to move on from this and focus on his new build, but I feel like the same thing could occur if he doesnt figure out exactly what went wrong. Communication with your tuner is key]

IKILLEDSUPERMAN_ZL1 · 08-24-2021, 02:42 PM

Tuner said it has no more then 15 degrees but FrankT looked at my tune and said it had 21. I did tell the tuner I had DSX flashed my FPCM to stop the drop in fuel pressure. Redflag right there that I had to send it off to get it flashed elsewhere. Before it was dropping to 50 from 58 psi. Afterwards it held steady at 58+ The tune wasnt touched after getting it back from the tuner. Yes I will not be going back to the same tuner.

Tarendor · 08-24-2021, 03:10 PM

Quote:

Originally Posted by IKILLEDSUPERMAN_ZL1

Tuner said it has no more then 15 degrees but FrankT looked at my tune and said it had 21. I did tell the tuner I had DSX flashed my FPCM to stop the drop in fuel pressure. Redflag right there that I had to send it off to get it flashed elsewhere. Before it was dropping to 50 from 58 psi. Afterwards it held steady at 58+ The tune wasnt touched after getting it back from the tuner. Yes I will not be going back to the same tuner.

The fpcm can be flashed with hptuners, so if your tuner didn't know how too do that then he/she is not up to date on hptuners capabilities.

eLeSthree · 08-24-2021, 08:24 PM

Quote:

Originally Posted by IKILLEDSUPERMAN_ZL1

Tuner said it has no more then 15 degrees but FrankT looked at my tune and said it had 21. I did tell the tuner I had DSX flashed my FPCM to stop the drop in fuel pressure. Redflag right there that I had to send it off to get it flashed elsewhere. Before it was dropping to 50 from 58 psi. Afterwards it held steady at 58+ The tune wasnt touched after getting it back from the tuner. Yes I will not be going back to the same tuner.

Ok hold on.

1. Did Frank see a log file?

2. The stock fpcm commands 58psi at idle and slopes down to 48psi (iabout) by redline. So your fuel pump was capable of supplying the commanded fuel pressure. The ZL1 fpcm tune file tells it to hold 58psi all the way to redline, instead of dropping off to 48. That is probably why your tuner didnt “waste” a credit on flashing the fpcm. You didnt need it. What size injectors do you have? My buddy ran ID1300x2s with a zl1 pump and a bap (no fpcm flash) on E85 upto 830whp. The fuel pressure dropped to 48psi AS COMMANDED and it Didnt matter cause his IDC was 67%.

Anyway, carry on…. GLW your project.

IKILLEDSUPERMAN_ZL1 · 08-24-2021, 11:05 PM

1000 cc FIC injectors. ZL1 pump and a BAP. I dont think my inj duty cycle was bad. Tuner only mentioned the FP dropping. He was concerned about that but never mentioned if I was running out of injectors. Anyways I appreciate all the input from everyone. I'm just ready to get it all back together and running soon.

Slowhawk · 09-17-2021, 11:12 AM

As for the tuning part. Always tune them with the MAP, then add the MAF if you want (I leave SD personally) It does make a difference.

08-20-2021, 01:33 PM	#29
IKILLEDSUPERMAN_ZL1 Drives: 2011 Camaro SS Join Date: Jul 2017 Location: Wichita,KS Posts: 603	Yeah it does suck. On a positive note the machine shop is making progress on the new block and I'll be ordering pistons and rods soon. __________________ 2011 Camaro 2SS, 6.0 iron block forged bottom end, Dart heads, BTR intake, Huron twin turbo kit, Summit stage 3 twin turbo cam, Circle D stage 4 6L90, 3800 FTI converter. BMR suspension, Viking coil overs, Fore triple pump fuel system.

08-21-2021, 11:44 AM	#30
FrankT 400HP used to be enough.. Drives: 2010 2SS rs manual Join Date: Aug 2009 Location: Central NC Posts: 772	FWIW, my Huron twin turbo car can't run any more than 12 degrees under boost without some KR creeping in. This is on 93 pump gas. But, I'll trade timing for boost any day. __________________ Build thread: http://www.camaro5.com/forums/showthread.php?t=47925

08-23-2021, 03:00 PM	#33
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	Well I hope you go to a different tuner on the new engine. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

08-24-2021, 02:42 PM	#35
IKILLEDSUPERMAN_ZL1 Drives: 2011 Camaro SS Join Date: Jul 2017 Location: Wichita,KS Posts: 603	Tuner said it has no more then 15 degrees but FrankT looked at my tune and said it had 21. I did tell the tuner I had DSX flashed my FPCM to stop the drop in fuel pressure. Redflag right there that I had to send it off to get it flashed elsewhere. Before it was dropping to 50 from 58 psi. Afterwards it held steady at 58+ The tune wasnt touched after getting it back from the tuner. Yes I will not be going back to the same tuner. __________________ 2011 Camaro 2SS, 6.0 iron block forged bottom end, Dart heads, BTR intake, Huron twin turbo kit, Summit stage 3 twin turbo cam, Circle D stage 4 6L90, 3800 FTI converter. BMR suspension, Viking coil overs, Fore triple pump fuel system.

08-24-2021, 11:05 PM	#38
IKILLEDSUPERMAN_ZL1 Drives: 2011 Camaro SS Join Date: Jul 2017 Location: Wichita,KS Posts: 603	1000 cc FIC injectors. ZL1 pump and a BAP. I dont think my inj duty cycle was bad. Tuner only mentioned the FP dropping. He was concerned about that but never mentioned if I was running out of injectors. Anyways I appreciate all the input from everyone. I'm just ready to get it all back together and running soon. __________________ 2011 Camaro 2SS, 6.0 iron block forged bottom end, Dart heads, BTR intake, Huron twin turbo kit, Summit stage 3 twin turbo cam, Circle D stage 4 6L90, 3800 FTI converter. BMR suspension, Viking coil overs, Fore triple pump fuel system.

09-17-2021, 11:12 AM	#39
Slowhawk Drives: 1999 Trans Am Join Date: Jul 2009 Location: Bridgewater,Ma Posts: 2,017	As for the tuning part. Always tune them with the MAP, then add the MAF if you want (I leave SD personally) It does make a difference.