Latest trip to the dyno. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZO6 Bryan · 03-19-2017, 09:30 PM

Put the ZL1 on the dyno again yesterday. Same dyno as before. And was very surprised with results. I had done some work on the tune but changed nothing since the last time. I have picked up a bunch of torque from previous runs. As in several very repeatable runs where I never made more than about 640 rwtq. Max hp still the same right at 700.

Then I remembered I have changed something since last dyno. I replaced the blower with a new warranty blower back in Dec '15. This much gain wasn't from just my tuning skills. This new blower must be much more efficient.

Dyno runs from Oct 15 vs yesterday. Wow!

DeSH · 03-19-2017, 09:50 PM

Always nice to be surprised by seeing a power/torque increase instead of decrease. I wonder if your tuning could have made up some of the difference.

KaBoom1701 · 03-19-2017, 09:53 PM

Nice.

This might make me want to update the blower.....

STUNNAH · 03-19-2017, 10:35 PM

Very nice gain...

ZO6 Bryan · 03-19-2017, 11:01 PM

Only other change was Ron Davis Hx, but that isn't going to help this much.

1709 · 03-19-2017, 11:57 PM

new blower might have give you more boost. or bypass is set up better, no boost lost?

GONMAD510 · 03-20-2017, 09:48 AM

My torque numbers were low when I had my car tuned. I was told that the car was losing traction on the dyno causing the number to be low.
That is a nice gain though.

2MCHPWR · 03-20-2017, 03:41 PM

wow that is crazy if its the new blower giving the gains.
big question - did you data log both runs and was there KR in either run?

ZMEnow · 03-20-2017, 07:24 PM

Quote:

Originally Posted by 1709

new blower might have give you more boost. or bypass is set up better, no boost lost?

If I remember you did do the bypass adjust with a Lingenfelter tool. Was that old or new SC?

ZO6 Bryan · 03-20-2017, 07:56 PM

Never used the Lingenfelter tool but adjusted the old blower by hand. Never made a difference. The new blower, I checked the adjustment and left it alone as it came. New blowers come with the bypass already installed and adjusted. If anyone remembers I swapped the blower myself and gave the old one back to the dealer mechanic that ordered me the new one because of the rattle.
Yes I logged the runs and there was no knock retard. The Mass Air does read slightly higher indicating the engine is moving more air. Boost pressure was the same at 188 kPa on both these runs. These are just two I overlapped to show. But I have 20+ old runs and 4 from saturday that all exhibit the same behavior when matched up against one another. It's not a fluke.
The tires weren't spinning. I've had that happen and the torque will flatten but it's not consistent. I have made 20 plus runs on different days and the torque curve was pretty much the same every time since doing the cam once it was dialed in. I've spent a lot of time actually trying to pick up the mid range with no success. Mainly because my friend with a ZR1 Vette that had done similar mods (close to the same boost, near same cam, headers, ID 850's etc) was making the same HP as my car but his torque was way higher in the 690rwtq range. And I tuned his to get it there! But I couldn't get mine there. I attributed it to the fact his car has a 2300cc blower. But now you overlap his best graphs with mine from saturday and they look like the same car.

I actually expected no difference on saturday because I had not changed anything I thought. We had a dyno day with several cars and I decided to throw mine on there too. And was pleasantly surprised. I played with AFR and richened it up a little bit saturday but It didn't make any difference because it was really close already on the first couple runs.

ZO6 Bryan · 03-20-2017, 08:21 PM

Check out the ZR1 vs my ZL1 now. ZR1 in red.

--

Can'tHave2MuchHP · 03-20-2017, 08:38 PM

Closed that gap in the torque curves you talked about before

*At least I think it was you*

Stephen12ZL1 · 03-20-2017, 08:44 PM

nice result! I still question the bypass circuit on the old supercharger. Same blower with same displacement and same peak boost...what else does that leave? No matter, the mid range is quite a bit healthier and peak numbers are nearly identical. Any difference in the street manners or SOTP?

ZO6 Bryan · 03-20-2017, 09:05 PM

Quote:

Originally Posted by Stephen12ZL1

nice result! I still question the bypass circuit on the old supercharger. Same blower with same displacement and same peak boost...what else does that leave? No matter, the mid range is quite a bit healthier and peak numbers are nearly identical. Any difference in the street manners or SOTP?

I had made sure the bypass was closing tight. But I wonder the same as well. Maybe tighter clearance of the rotor lobes to the blower case?

03-19-2017, 09:30 PM	#1
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	Latest trip to the dyno. Put the ZL1 on the dyno again yesterday. Same dyno as before. And was very surprised with results. I had done some work on the tune but changed nothing since the last time. I have picked up a bunch of torque from previous runs. As in several very repeatable runs where I never made more than about 640 rwtq. Max hp still the same right at 700. Then I remembered I have changed something since last dyno. I replaced the blower with a new warranty blower back in Dec '15. This much gain wasn't from just my tuning skills. This new blower must be much more efficient. Dyno runs from Oct 15 vs yesterday. Wow! Attached Images __________________ Bryan 2018 ZL1 M6

03-19-2017, 09:53 PM	#3
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	Nice. This might make me want to update the blower..... __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

03-19-2017, 10:35 PM	#4
STUNNAH "BEASTM*DE" Drives: 2013 ZL1 Black Join Date: Aug 2016 Location: Tennessee Posts: 1,655 View My Garage	Very nice gain... __________________ Vengeance Racing Stage 1 Kit 575rwhp, 569 rwtq... Rims powder coated gloss black...BFG'S Comp 2 A/S... Dual 10" Kicker Comp S Subs 1200w...

03-19-2017, 11:01 PM	#5
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	Only other change was Ron Davis Hx, but that isn't going to help this much. __________________ Bryan 2018 ZL1 M6

03-20-2017, 09:48 AM	#7
GONMAD510 Drives: 2013 ZL1 M6 Join Date: Sep 2016 Location: CA Bay Area Posts: 248	My torque numbers were low when I had my car tuned. I was told that the car was losing traction on the dyno causing the number to be low. That is a nice gain though. __________________ Fast 850cc Injectors, ATI Balancer, 8.66 Lower Pulley, 2.55 Upper Pulley, Lingenfelter CAI, Kooks LT with cat delete pipes, Noweeds Exhaust Cutouts (extremely loud under full throttle), BTR Stage 3 Cam, BTR Platinum 660 Valve Spring Kit, TR7ix Iridium Spark Plugs, Lingenfelter Solid Isolator, 160 Degree Thermostat, Larger SC Coolant Reservoir with Hose Relocation Kit, BMR 1.25" Lowering Springs, MGW Short Throw Shifter, Racing Brake 2 piece rotors front and rear, Starkweather Performance Custom Dyno Tune on 91 Octane. 691.38 RWHP 630.35 RWTQ

03-19-2017, 09:50 PM	#2
DeSH Drives: 2013 ZL1 A6 #4801 Join Date: Mar 2016 Location: Pensacola, Florida Posts: 241	Always nice to be surprised by seeing a power/torque increase instead of decrease. I wonder if your tuning could have made up some of the difference.

03-19-2017, 11:57 PM	#6
1709 9.56@144.09 Drives: 2013 zl1 black Join Date: Mar 2013 Location: dawson creek Posts: 272	new blower might have give you more boost. or bypass is set up better, no boost lost?

03-20-2017, 03:41 PM	#8
2MCHPWR Drives: 2009 z06 Join Date: Jul 2014 Location: NY Posts: 136	wow that is crazy if its the new blower giving the gains. big question - did you data log both runs and was there KR in either run?

03-20-2017, 07:56 PM	#10
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	Never used the Lingenfelter tool but adjusted the old blower by hand. Never made a difference. The new blower, I checked the adjustment and left it alone as it came. New blowers come with the bypass already installed and adjusted. If anyone remembers I swapped the blower myself and gave the old one back to the dealer mechanic that ordered me the new one because of the rattle. Yes I logged the runs and there was no knock retard. The Mass Air does read slightly higher indicating the engine is moving more air. Boost pressure was the same at 188 kPa on both these runs. These are just two I overlapped to show. But I have 20+ old runs and 4 from saturday that all exhibit the same behavior when matched up against one another. It's not a fluke. The tires weren't spinning. I've had that happen and the torque will flatten but it's not consistent. I have made 20 plus runs on different days and the torque curve was pretty much the same every time since doing the cam once it was dialed in. I've spent a lot of time actually trying to pick up the mid range with no success. Mainly because my friend with a ZR1 Vette that had done similar mods (close to the same boost, near same cam, headers, ID 850's etc) was making the same HP as my car but his torque was way higher in the 690rwtq range. And I tuned his to get it there! But I couldn't get mine there. I attributed it to the fact his car has a 2300cc blower. But now you overlap his best graphs with mine from saturday and they look like the same car. I actually expected no difference on saturday because I had not changed anything I thought. We had a dyno day with several cars and I decided to throw mine on there too. And was pleasantly surprised. I played with AFR and richened it up a little bit saturday but It didn't make any difference because it was really close already on the first couple runs. __________________ Bryan 2018 ZL1 M6

03-20-2017, 08:21 PM	#11
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	Check out the ZR1 vs my ZL1 now. ZR1 in red. -- Attached Images __________________ Bryan 2018 ZL1 M6

03-20-2017, 08:38 PM	#12
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	Closed that gap in the torque curves you talked about before At least I think it was you

03-20-2017, 08:44 PM	#13
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,815	nice result! I still question the bypass circuit on the old supercharger. Same blower with same displacement and same peak boost...what else does that leave? No matter, the mid range is quite a bit healthier and peak numbers are nearly identical. Any difference in the street manners or SOTP? __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)