That is just too low. If the dyno read that I'd suspect either the dyno, or the car, had a problem...
Super Clean C6 Corvette
Thread Starter
Former Vendor
Joined: Jul 2007
Posts: 1,255
Likes: 9
From: Marietta Ga
Super Clean C6 Corvette
Mr Cooper wanted to add a little more kick to his bone stock 2007 C6. This Corvette looks like it just came off the showroom floor with it's perfect white paint and spotless interior.
Check out the list of goodies
American Racing Header System-Headers, X-Pipe, and High Flow Cats
Borla Touring axle back muffler system
MTI Racing custom Stage 1 Camshaft
Callaway Honker
MTI Racing Hot Spark Plug Wires
Low Temp T-Stat
Custom Dyno Tune
With the addition of the headers and the Callaway Honker we have been able to make the engine more efficient by getting more air in and out. Put the camshaft on top of that and the engine really comes to life.
Before any of the upgrades were made Mr Cooper's Corvette had 295rwhp, after the upgrades Mr Cooper's Corvette now has 385.89rwhp 367.59rwtorque and sounds great with the headers and Borla Touring axle back exhaust.
The MTI Racing Stage 1 camshaft is what we call the stealth cam, it does not change the mannerisms or driveability and can be used with the stock stall converter. This is a fantastic cam by itself and works perfectly with the Magnacharger Supercharging systems.
Check out the list of goodies
American Racing Header System-Headers, X-Pipe, and High Flow Cats
Borla Touring axle back muffler system
MTI Racing custom Stage 1 Camshaft
Callaway Honker
MTI Racing Hot Spark Plug Wires
Low Temp T-Stat
Custom Dyno Tune
With the addition of the headers and the Callaway Honker we have been able to make the engine more efficient by getting more air in and out. Put the camshaft on top of that and the engine really comes to life.
Before any of the upgrades were made Mr Cooper's Corvette had 295rwhp, after the upgrades Mr Cooper's Corvette now has 385.89rwhp 367.59rwtorque and sounds great with the headers and Borla Touring axle back exhaust.
The MTI Racing Stage 1 camshaft is what we call the stealth cam, it does not change the mannerisms or driveability and can be used with the stock stall converter. This is a fantastic cam by itself and works perfectly with the Magnacharger Supercharging systems.
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A 91 rwhp gain for headers, honker and a mild cam is not completely unrealistic. The baseline and end results are off by about the same amount. Just looks like he put in the wrong gear ratio and ended up 10% lower on both numbers. However, MTI is a pretty well respected tuner, so neither sandbagging nor technician error is easy to believe.
Corvette Enthusiast
Joined: Aug 2006
Posts: 579
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From: Acworth Georgia
After MTI stating that that was indeed the numbers, man that car was like a factory freak but in a different direction, baseline power numbers were low but hey hes near 400 now so I bet he can tell a big difference.
Last edited by everjeff; Jul 20, 2010 at 04:05 PM. Reason: New info was added to the post by MTI.
Thread Starter
Former Vendor
Joined: Jul 2007
Posts: 1,255
Likes: 9
From: Marietta Ga
We’ve seen some cars come in with lower than average. But it also highlights that you can sometimes remedy a factory shortcoming with some modifications.
We did go back and review several examples of 2007 automatic Corvettes and found that most cars will baseline at around 320 rwhp. But as you will see in the dyno graph, the baseline of THIS particular car was 301 rwhp. The 295 figure was probably attained after the engine had gone into cat-protection mode.
So…yes, the baseline was much lower than we expected. Here is the dyno graph that has the horsepower figures without cat protection mode, but still lower than average.
Also, keep in mind that we used a MILD camshaft. Small enough to use stock converter, yet made some pretty good gains.
Last edited by MTI RACING; Jul 20, 2010 at 10:02 AM.
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