Disappointed performance with Diablo Predator
Thread Starter
Heel & Toe
Joined: Aug 2010
Posts: 21
Likes: 1
From: buffalo New York
Disappointed performance with Diablo Predator
I have a 06 C6 corvette. I purchased a Diablo Sport Predator tuner
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
Drifting
Joined: Jun 2007
Posts: 1,437
Likes: 5
I didnt dyno my C5 before and after, but the difference I felt was in the auto trans. It deleted the torgue mgmt and increased line pressure which translated to shifts you could feel. For example, 1-2 shift would chirp!
The M6 C5 guys didn't feel much difference with the Diablo either.
As for the engine tune/timing...maybe the LS2/3 motors have more aggressive maps right outta the box.
The best tune will be from an experienced tuner.
The M6 C5 guys didn't feel much difference with the Diablo either.
As for the engine tune/timing...maybe the LS2/3 motors have more aggressive maps right outta the box.
The best tune will be from an experienced tuner.
Thread Starter
Heel & Toe
Joined: Aug 2010
Posts: 21
Likes: 1
From: buffalo New York
and re-dyno. No gain in HP or Torque. The C6 has lots of H.P. and torque but I feel the automatic transmission is holding it back.
Pro
Joined: Mar 2010
Posts: 516
Likes: 6
From: Salisbury North Carolina
St. Jude Donor '12
I have a 06 C6 corvette. I purchased a Diablo Sport Predator tuner
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
all the way home and then some. 
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
mjm ...
Ditto what Vettes R Us said.
Chuck CoW's shop is just north of New York City (very close to Sing Sing)
Give him a call. If you want a real tune, he is the guy that will give you results.
Ditto what Vettes R Us said.
Chuck CoW's shop is just north of New York City (very close to Sing Sing)
Give him a call. If you want a real tune, he is the guy that will give you results.
Racer
Joined: Dec 2007
Posts: 396
Likes: 5
From: Liberty Hill TX
With Chuck, you get a CUSTOM tune; not a "canned tune". Every car is different and Chuck gives you a tune that's right for your car. I don't think he is more than a few hours from where you live. Drive up to his shop and get his tune and COW BOOSTER. You won't be sorry.
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Instructor
Joined: Aug 2010
Posts: 220
Likes: 1
From: TORONTO
I have a 06 C6 corvette. I purchased a Diablo Sport Predator tuner
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
-the very best, safe, reliable tune will only give you afew % improvement if any no matter what they say
-they just give you full throttle when you press the pedal 1/4 to make it seem like they gave you more power
Thread Starter
Heel & Toe
Joined: Aug 2010
Posts: 21
Likes: 1
From: buffalo New York
With you being in New York sounds like you need a "Chuck Cow Tune". I also looked into buying a predator also, but just so happen Chuck was visiting a show that following weekend. Man am I glad that I got the Chuck Cow tune instead. He also has this product called a Cow Booster that is awesome. Go over in Scan and Tune and search for it. He has thousands of satisfied customers me being one of them. This thing will really wake your car up. Trust me get the car in his hands and you will be all the way home and then some.
all the way home and then some. Do you have his address and phone number?
Former Vendor
Joined: Feb 2007
Posts: 2,572
Likes: 1
From: Austin Texas
I had a customer that came into the shop with a 2004 Pontiac GTO. The plan was to install Kooks Longtube Headers and Catted Connection Pipes. I always get a base line to measure the gains from mods. This customer had a Diablo Handheld Tuner. In order for me to properly tune the GTO, we re installed the the stock tune and gained 15 rwhp and the same on torque.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
The method to determine results is the most important aspect of a tune.
A butt dyno can't feel a 12 hp difference on a 400 hp car.
A chassis dyno can pretty much accurately measure differences while the car is sitting still.
A timeslip doesn't give a hp number, but does measure power differences in a real world manner.
I'm not a professional tuner, but even I can easily reduce your engine hp and modify your A6 transmission to make your car run slower and yet make you feel like it's faster.
The chassis dyno could confirm the hp loss and the timeslip would confirm the car was slower. However, your butt dyno would still make your mind believe the increase in power was AMAZING.
Some people are happy to pay for something that just makes them feel good and others want verifiable documented proof.
Pro
Joined: Jul 2008
Posts: 741
Likes: 8
From: Netherlands
I have a 06 C6 corvette. I purchased a Diablo Sport Predator tuner
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
thinking I would gain some H.P. and Torque After the tune I gain no H.P. or torque ( Car was dyno before and after tune) I expected some gain
off the line, 40 to 60 mile passing. I thought it would down shift faster and stay in gear longer building RPMs. In driving I notice very little if any change. Has anyone else had similar results?
Mike
Mods
Hyper Tech programmer
So which one was disappointing ?
Former Vendor
Joined: Nov 2005
Posts: 11,792
Likes: 255
From: Ossining New York
St. Jude Donor '07-'08-'09-'10-'12-'13-'14
Call any time!
Call any time!
Chuck Mosello - CORVETTE DOCTOR
Corvettes of Westchester
37 Old Albany Post Road
Ossining, N.Y. 10562
914-332-0049
www.CORVETTES-OF-WESTCHESTER.com
Chuck CoW
Safety Car
Joined: Apr 2008
Posts: 4,831
Likes: 1,847
From: NJ
2025 C8 of the Year Finalist - Modified
2023 C8 of the Year Finalist - Unmodified
2022 C7 of the Year Finalist - Modified
2021 C7 of the Year Finalist - Unmodified
Must be hit or miss with these things.. When I had mine, I noticed a difference in power shortly after install. When I took the car to the track, it ran almost .3 quicker than the week before (with similar track conditions). So I was very happy with it.
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
I haven't tried one on my 2002 Z06 but when I used one on my 2009 Dodge Charger R/T Super Track Pack is really made a significant difference in overall performance and with gas mileage. I was pleased with it.