Dyno / 16 Camaro SS (A8, stock) - Page 2

Eric SS · 03-01-2016, 09:46 AM

Quote:

Originally Posted by jdasnt3

More torque. The OP shows more torque than HP, and stock on a Mustang dyno we did 402 HP and 404 torque. Final numbers with a PTB and tune are in my signature.

Thanks for catching that. corrected. So why so much more tq than hp? What gear did you dyno in?

CarsInGeneral27 · 03-01-2016, 10:23 AM

Quote:

Originally Posted by TSloper

I had some baseline pulls done this morning. The three runs were almost identical with the last run being the best. I did log on the scanner if anyone is interested in that data. Thanks to Chris at RPM Motorsports! All runs were done in 5th gear. The AFR curve is based on a stoich of 14.7 rather than 14.11 but the lambdas follow pretty closely to what the commanded should be.

410.40 RWTQ
391.66 RWHP

Attachment 777826

Were those numbers with 91 or 93?

TSloper · 03-01-2016, 10:28 AM

Without locking up the converter (wouldn't recommend that on the stock TC) and seeing the result I wouldn't get too hung up on which is higher. You will also see that the AFR richened up at the upper RPMs. This was likely holding back the HP curve a bit in that area. You will also notice a slight lull between 4K and 4.5K on the TQ curve. The lull directly matches the commanded timing curve. So there are a number of small areas that could be massaged in the tuning to improve things. Until I make a legitimate modification it just isn't worth messing with.

I'm thinking the MSD intake is going to be my first mod if the JDP results hold true. Given the AFM/NPP challenges on the A8 working the exhaust side just seems to not offer the best bang for the buck. I'm anxiously awaiting post tune results on the MSD intake. No one ever seems offer up logs of their dyno runs to get to the details of what is going on.

TSloper · 03-01-2016, 10:29 AM

Quote:

Originally Posted by CarsInGeneral27

Were those numbers with 91 or 93?

93 Shell with ethanol up to 10%

SpeedIsLife · 03-01-2016, 10:33 AM

I really wish 93 was available nation-wide..

Here in Oregon the best we can get is 92 from either Mobil or Shell. Of course there is the "clear super" which is 100% gasoline, no ethanol, produced in limited amounts by local smaller refineries...for $4.75 a gallon usually.

Eric SS · 03-01-2016, 11:18 AM

Quote:

Originally Posted by TSloper

Without locking up the converter (wouldn't recommend that on the stock TC) and seeing the result I wouldn't get too hung up on which is higher. You will also see that the AFR richened up at the upper RPMs. This was likely holding back the HP curve a bit in that area. You will also notice a slight lull between 4K and 4.5K on the TQ curve.

I'm not hung up on it, just curious why. Thanks for the info.

SuperSound · 03-01-2016, 02:15 PM

Quote:

Originally Posted by TSloper

Without locking up the converter (wouldn't recommend that on the stock TC) and seeing the result I wouldn't get too hung up on which is higher. You will also see that the AFR richened up at the upper RPMs. This was likely holding back the HP curve a bit in that area. You will also notice a slight lull between 4K and 4.5K on the TQ curve. The lull directly matches the commanded timing curve. So there are a number of small areas that could be massaged in the tuning to improve things. Until I make a legitimate modification it just isn't worth messing with.

Pretty sure the converter locks up at anything over like 15-20mph. The ZF based units do this I know. I'd imagine GM designed the 8L90 the same way.

TSloper · 03-01-2016, 02:42 PM

Quote:

Originally Posted by SuperSound

Pretty sure the converter locks up at anything over like 15-20mph. The ZF based units do this I know. I'd imagine GM designed the 8L90 the same way.

I just looked at the tune. You are correct!

laynlo15 · 03-01-2016, 04:03 PM

The drag strip is the true test. A lot of the number have varied a bunch, anywhere from 370's to 420's. Dyno's do vary as the load the drive train differently. I've never been on anything other the a Mustang dyno which usually puts up a lower number the a Dynojet. Temps, humidity and dyno all play a factor in those numbers. Like he said its just a baseline for further mods. But nothing wrong with bragging rights either, his numbers are tweeners or just about in the middle of the highs and lows. I'd be proud of those numbers

SpeedIsLife · 03-01-2016, 04:05 PM

Considering a L99 A6 usually would dyno around 335 WHP..I'd say the community is rapidly getting spoiled with a brand new automatic pumping out nearly 400 WHP.

jdasnt3 · 03-01-2016, 04:22 PM

Quote:

Originally Posted by laynlo15

The drag strip is the true test. A lot of the number have varied a bunch, anywhere from 370's to 420's. Dyno's do vary as the load the drive train differently. I've never been on anything other the a Mustang dyno which usually puts up a lower number the a Dynojet. Temps, humidity and dyno all play a factor in those numbers. Like he said its just a baseline for further mods. But nothing wrong with bragging rights either, his numbers are tweeners or just about in the middle of the highs and lows. I'd be proud of those numbers

Well said. Our gains were nearly four tenths with the extra 20HP and torque to the wheels. Ours was a Mustang Dyno, and we got very respectable numbers in the FL heat and humidity. And they were backed up by the track numbers.

03-01-2016, 10:28 AM	#17
TSloper Drives: 2016 Camaro SS Join Date: Jan 2016 Location: Mount Dora, FL Posts: 779	Without locking up the converter (wouldn't recommend that on the stock TC) and seeing the result I wouldn't get too hung up on which is higher. You will also see that the AFR richened up at the upper RPMs. This was likely holding back the HP curve a bit in that area. You will also notice a slight lull between 4K and 4.5K on the TQ curve. The lull directly matches the commanded timing curve. So there are a number of small areas that could be massaged in the tuning to improve things. Until I make a legitimate modification it just isn't worth messing with. I'm thinking the MSD intake is going to be my first mod if the JDP results hold true. Given the AFM/NPP challenges on the A8 working the exhaust side just seems to not offer the best bang for the buck. I'm anxiously awaiting post tune results on the MSD intake. No one ever seems offer up logs of their dyno runs to get to the details of what is going on. Last edited by TSloper; 03-01-2016 at 10:40 AM.

03-01-2016, 10:33 AM	#19
SpeedIsLife Drives: Current Camaro-less Join Date: Jul 2014 Location: Oregon Posts: 3,241	I really wish 93 was available nation-wide.. Here in Oregon the best we can get is 92 from either Mobil or Shell. Of course there is the "clear super" which is 100% gasoline, no ethanol, produced in limited amounts by local smaller refineries...for $4.75 a gallon usually.

03-01-2016, 04:03 PM	#23
laynlo15 Drives: 2022 Lt1 A10 Join Date: Nov 2015 Location: clark, mo Posts: 8,882	The drag strip is the true test. A lot of the number have varied a bunch, anywhere from 370's to 420's. Dyno's do vary as the load the drive train differently. I've never been on anything other the a Mustang dyno which usually puts up a lower number the a Dynojet. Temps, humidity and dyno all play a factor in those numbers. Like he said its just a baseline for further mods. But nothing wrong with bragging rights either, his numbers are tweeners or just about in the middle of the highs and lows. I'd be proud of those numbers

03-01-2016, 04:05 PM	#24
SpeedIsLife Drives: Current Camaro-less Join Date: Jul 2014 Location: Oregon Posts: 3,241	Considering a L99 A6 usually would dyno around 335 WHP..I'd say the community is rapidly getting spoiled with a brand new automatic pumping out nearly 400 WHP.

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