Weak Dyno results - 2011 SS Auto with Edelbrock Supercharger - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Pro Stock John · 05-22-2011, 11:59 AM

Lousiana:

Geoff Skinner EPS
Alan Futral Futral Performance

I'd run a CAI too.

So if the car say ran 13.4@105 stock, you'd want to run 12.5@117 for all the work you've done or what numbers do you think make sense? Automatic dyno numbers are not always the most reliable indicator of how much power you're making.

yonson · 05-23-2011, 10:58 AM

Give Southern Speed in Tupelo MS a ring.

FloMoCamaro · 05-23-2011, 02:35 PM

Quote:

Originally Posted by Z_Rocks

My best suggestion is to call Andy at ADM Performance
http://admperformance.com/
Andy Mages
214-228-8782

Set appointment with him and he is the best.

+1 - Andy @ ADM Performance has cars come into the shop from all over the country. Give them a call...

RAYSRT8 · 05-25-2011, 01:56 PM

I had the exact same issue when my E-Force was installed...It turned out to be the belt was a little too long and the tensioner pulley was bottoming out under hard accel and the belt was slipping a little which resulted in poor numbers. The belt did not make a noise that it usually does when it slips, but I noticed how close the tensioner was to bottoming out so I went to the local parts store and replaced it with a slightley smaller Gates belt. Once I installed the the vehicle behaved like a supercharged SS should.. If it were me this is where I would start. I hope this helps.

lahatte · 05-27-2011, 08:47 AM

Quote:

Originally Posted by Ray2SS

I had the exact same issue when my E-Force was installed...It turned out to be the belt was a little too long and the tensioner pulley was bottoming out under hard accel and the belt was slipping a little which resulted in poor numbers. The belt did not make a noise that it usually does when it slips, but I noticed how close the tensioner was to bottoming out so I went to the local parts store and replaced it with a slightley smaller Gates belt. Once I installed the the vehicle behaved like a supercharged SS should.. If it were me this is where I would start. I hope this helps.

This definitely sounds like it could be the issue. The belt seemed to go on way to easy... Do you remember the size you got to replace it?

The one that came with the supercharger is a 6 rib (ouch) Goodyear part # 51-7041.. it is 104.5"

I don't know why edelbrock didn't go with a wider belt...

RAYSRT8 · 05-27-2011, 08:46 PM

Quote:

Originally Posted by lahatte

This definitely sounds like it could be the issue. The belt seemed to go on way to easy... Do you remember the size you got to replace it?

The one that came with the supercharger is a 6 rib (ouch) Goodyear part # 51-7041.. it is 104.5"

I don't know why edelbrock didn't go with a wider belt...

I think is was 103.5 but I may be off.... the parts store let me keep trying them until I found the correct one:. I would pretty much bet that is the problem. Before I changed the belt the tensioner was only about a quarter of the way from bottoming out. After I changed the belt it was at the halfway mark and worked like a charm. Hope this info helps.

GEN-IV · 05-28-2011, 08:09 AM

Great info, thanks!

ADIO SS · 05-28-2011, 09:33 AM

Quote:

Originally Posted by 10aSSee D

You need to do the Jannetty fuel rail upgrade and your numbers will go up and fix your lean condition.

The fuel rails are to prevent a problem - by themselves, they do not provide more power. It opens the door...to further improvements.

RAYSRT8 · 05-30-2011, 10:01 PM

Quote:

Originally Posted by lahatte

We are disappointed in the dyno results. The car has the following specs:

2011 SS Automatic Trans with all factory upgrades including aftermarket GM performance mufflers
Edelbrock Supercharger
Hedman ss shorty headers
JBA Mid pipes with high flow cats

I've attached the 2 dyno runs. The car ran lean at peak torque.

Any input on this? Are these normal figures for this setup? I was hoping for around 450-500rwhp...

Any word on you vehicle yet?

Stingr69 · 06-07-2011, 05:59 PM

Lahatte,
Did you ever get to the bottom of this?

-Mark.

RAYSRT8 · 06-20-2011, 11:24 AM

Man you left us hanging.. Any word yet?

JANNETTYRACING · 06-20-2011, 11:47 AM

We are Hooking him up with some upgrades and a Tune.

We will get him running Right.

lahatte · 09-20-2011, 07:25 AM

**** UPDATE ****

Sorry for the late update!!!

We ended up talking the car to Jannetty .... Great move!

We did a few upgrades and got a few tunes from Jannetty (from a distance)
- got rid of the shortty headers and hiflow cats by replacing them with long tubes.
- did the rotofab intake
- went from 3.5" pulley to 3" (automatic car)
- fuel rail upgrade
- installed MSD fuel pump voltage regulator thingy

After several tunes the car was performing much better!
We ended up taking a trip to TX to see some friends and dyno'd the car then sent Ted Jannetty the data. He sent back a few tunes and we got the car to:

461.99 hp / 495.64 Torque
459.27 hp / 498.45 Torque

Running 93 octane...
I think it was 106 degrees outside and 98 degrees in the dyno too...
So cool weather will be a whole other story....

JANNETTYRACING · 09-20-2011, 09:22 AM

Quote:

Originally Posted by lahatte

**** UPDATE ****

Sorry for the late update!!!

We ended up talking the car to Jannetty .... Great move!

We did a few upgrades and got a few tunes from Jannetty (from a distance)
- got rid of the shortty headers and hiflow cats by replacing them with long tubes.
- did the rotofab intake
- went from 3.5" pulley to 3" (automatic car)
- fuel rail upgrade
- installed MSD fuel pump voltage regulator thingy

After several tunes the car was performing much better!
We ended up taking a trip to TX to see some friends and dyno'd the car then sent Ted Jannetty the data. He sent back a few tunes and we got the car to:

461.99 hp / 495.64 Torque
459.27 hp / 498.45 Torque

Running 93 octane...
I think it was 106 degrees outside and 98 degrees in the dyno too...
So cool weather will be a whole other story....

Thank you for the Business and Feedback.

Ted.

05-22-2011, 11:59 AM	#29
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	Lousiana: Geoff Skinner EPS Alan Futral Futral Performance I'd run a CAI too. So if the car say ran 13.4@105 stock, you'd want to run 12.5@117 for all the work you've done or what numbers do you think make sense? Automatic dyno numbers are not always the most reliable indicator of how much power you're making. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

05-25-2011, 01:56 PM	#32
RAYSRT8 Drives: 2011 Challenger SRT8 6.4L 392 Hemi Join Date: Jul 2010 Location: Smyrna, TN Posts: 778 View My Garage	I had the exact same issue when my E-Force was installed...It turned out to be the belt was a little too long and the tensioner pulley was bottoming out under hard accel and the belt was slipping a little which resulted in poor numbers. The belt did not make a noise that it usually does when it slips, but I noticed how close the tensioner was to bottoming out so I went to the local parts store and replaced it with a slightley smaller Gates belt. Once I installed the the vehicle behaved like a supercharged SS should.. If it were me this is where I would start. I hope this helps. __________________ 2011 Stock 6.4L 392 Hemi Challenger Flowmaster American Thunder Series Cat Back Camaro parts for sale: http://www.camaro5.com/forums/showthread.php?t=152474 Last edited by RAYSRT8; 05-25-2011 at 02:10 PM.

05-28-2011, 08:09 AM	#35
GEN-IV Right Cam Drives: 2010 LS3 / 79 Z28 Join Date: Jun 2009 Location: Maine Posts: 508	Great info, thanks! __________________ 2010 2SS/RS M6 CGM E-Force + 2015 1LT V6/A6

06-20-2011, 11:24 AM	#39
RAYSRT8 Drives: 2011 Challenger SRT8 6.4L 392 Hemi Join Date: Jul 2010 Location: Smyrna, TN Posts: 778 View My Garage	Man you left us hanging.. Any word yet? __________________ 2011 Stock 6.4L 392 Hemi Challenger Flowmaster American Thunder Series Cat Back Camaro parts for sale: http://www.camaro5.com/forums/showthread.php?t=152474

06-20-2011, 11:47 AM	#40
JANNETTYRACING Drives: BLUE CAMARO ZL1 1LE M6 Join Date: Jun 2009 Location: ON THE DYNO WATERBURY CT. Posts: 15,223	We are Hooking him up with some upgrades and a Tune. We will get him running Right. __________________ www.jannettyracing.com Celebrating 37 years Performance parts, Installation, Fabrication, Dyno tuning, Remote custom tuning, and alignments. 203-753-7223 Waterbury CT. 06705 email tedj@jannettyracing.com

05-23-2011, 10:58 AM	#30
yonson Drives: where to begin... Join Date: May 2010 Location: MiSSiSSiPPi Posts: 34	Give Southern Speed in Tupelo MS a ring.

06-07-2011, 05:59 PM	#38
Stingr69 '69 Owned Since '79 Drives: '69 Z/28 LeMans Blue w/White Join Date: Oct 2008 Location: LR AR Posts: 1,847 View My Garage	Lahatte, Did you ever get to the bottom of this? -Mark.

09-20-2011, 07:25 AM	#41
lahatte Drives: 2011 Camaro SS Join Date: Apr 2011 Location: Mississippi Posts: 19	** UPDATE ** Sorry for the late update!!! We ended up talking the car to Jannetty .... Great move! We did a few upgrades and got a few tunes from Jannetty (from a distance) - got rid of the shortty headers and hiflow cats by replacing them with long tubes. - did the rotofab intake - went from 3.5" pulley to 3" (automatic car) - fuel rail upgrade - installed MSD fuel pump voltage regulator thingy After several tunes the car was performing much better! We ended up taking a trip to TX to see some friends and dyno'd the car then sent Ted Jannetty the data. He sent back a few tunes and we got the car to: 461.99 hp / 495.64 Torque 459.27 hp / 498.45 Torque Running 93 octane... I think it was 106 degrees outside and 98 degrees in the dyno too... So cool weather will be a whole other story....

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