Should I get a retune?
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,098
Likes: 0
From: Yorkville IL
Should I get a retune?
After spending $1,800.00 for kooks header/cats and a vararam intake. 450 for a dyno tune. 450 for install of vararam/headers. I only got 20rwhp and 40rwtq. thats $135/1 rwhp Should I take it to another tuner for a dyno tune?
09 C6 Z51 manual
trapp
365/351 stock
385/391 after tune
09 C6 Z51 manual
trapp
365/351 stock
385/391 after tune
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Some cars dont come as rich from the factory as others and have less room for improvement in tuning.
That doesn't mean that another tuner couldnt get more out of it, but tuning these cars is NOT hard at all and if they have tuned cars in the past then they shouldnt have any issue tuning yours.
Tuning any car is basically the same getting the spark tables worked out, which is where most of the power comes from, and then fine tuning the air:fuel mixture.
That doesn't mean that another tuner couldnt get more out of it, but tuning these cars is NOT hard at all and if they have tuned cars in the past then they shouldnt have any issue tuning yours.
Tuning any car is basically the same getting the spark tables worked out, which is where most of the power comes from, and then fine tuning the air:fuel mixture.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Also, different dynos read differently. A dyno is only a means of tuning.
You only picked up 20 rwhp, but you picked up 40 rwtq.
Did you ask them if those numbers were about on par with what corvettes with longtubes are dynoing?
You only picked up 20 rwhp, but you picked up 40 rwtq.
Did you ask them if those numbers were about on par with what corvettes with longtubes are dynoing?
Pro
Joined: Jul 2008
Posts: 647
Likes: 5
something is def not right. You should pick up 20 hp with just the tune and vararam. You need a better tuner and diff shop. Plus, 365 for a 6 speed 09 is way low. Should be 375-380 atleast. If I spent all that money and thats all I got I would be pissed
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
Dynojets will give you higher numbers than mustang dynos.
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Melting Slicks
Joined: May 2004
Posts: 3,017
Likes: 2
Don't concentrate on the end numbers but rather the delta..20 rwhp and 40tq is nothing to sneeze at. I gained 28hp/35tq with my AR header install/tune. It could be the tuner "left a little on the table" to be safe. Maybe he purposely left it a bit fat on top thinking the vararam will lean it out a bit when your on the street? You will feel the 40tq in every day driving a lot more than the 20hp at 5800rpm..Do you have the dyno sheet to post up?
Racer
Joined: Nov 2008
Posts: 296
Likes: 23
From: Mooresville NC
I have 414 rwhp with the following mods:
Stainless Works Headers and CATS
Callaway Honker CAI
Dyno Tune
2008 C6 Convertible - Automatic
Stainless Works Headers and CATS
Callaway Honker CAI
Dyno Tune
2008 C6 Convertible - Automatic
Last edited by teuhl; May 14, 2009 at 09:17 PM. Reason: Wrong Year
Melting Slicks
Joined: Nov 2004
Posts: 2,408
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From: Northcentral, Pennsylvania
St. Jude Donor '09-'11
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,098
Likes: 0
From: Yorkville IL
Pro
Joined: Jul 2008
Posts: 647
Likes: 5
Thread Starter
Burning Brakes
Joined: Nov 2006
Posts: 1,098
Likes: 0
From: Yorkville IL
trapp.......there goes another 400 bucks
Melting Slicks
Joined: Dec 2008
Posts: 2,296
Likes: 3
dynos just give you #s, if they tuned it and installed everything correctly there is no point in wasting your money. Maybe when you're going to get something else installed like a FAST intake or something, then you can get a retune and see how much more you get 
Melting Slicks
Joined: May 2004
Posts: 3,017
Likes: 2
Maybe wait for a dyno day, or something similar. Most of those you can get a pull on the dyno for $40-$50..