Drag Racing Results, Trap Speed, Reaction Time, Driving Technique, Tips for Running the Corvette in the ¼ & 1/8 mile, Events

Gains going to a 26 inch slick from a 28

Thread Tools
 
Search this Thread
 
Old 12-25-2018, 09:28 AM
  #1  
SVT_Z06
Racer
Thread Starter
 
SVT_Z06's Avatar
 
Member Since: Aug 2010
Location: San Diego CA
Posts: 472
Received 9 Likes on 9 Posts
Default Gains going to a 26 inch slick from a 28

2004 Z06. 28x10x17. Best 60ft. 1.62. Stock 3.42 gears.

Will I gain anything by going to a 26 inch slick?

Best 1/8 mile is 7.02 @ 103 mph so far.

Merry Christmas!
Old 12-26-2018, 08:57 PM
  #2  
Halfvette
Intermediate
 
Halfvette's Avatar
 
Member Since: Dec 2018
Location: Chicago
Posts: 42
Received 2 Likes on 2 Posts
Default

What rpm are you seeing at the finish and how much rpm drop between shifts now? I lost .3 going from a 26” to a 28” in my ctsv fwiw.
Old 12-26-2018, 09:25 PM
  #3  
SVT_Z06
Racer
Thread Starter
 
SVT_Z06's Avatar
 
Member Since: Aug 2010
Location: San Diego CA
Posts: 472
Received 9 Likes on 9 Posts
Default

Originally Posted by Halfvette
What rpm are you seeing at the finish and how much rpm drop between shifts now? I lost .3 going from a 26” to a 28” in my ctsv fwiw.
I'll have to look.

I keep seeing that with my current 3.42 gears, mph should go up with the 26" tires. Hmm....
Old 12-26-2018, 09:33 PM
  #4  
Halfvette
Intermediate
 
Halfvette's Avatar
 
Member Since: Dec 2018
Location: Chicago
Posts: 42
Received 2 Likes on 2 Posts
Default

You wanna be going through the traps at or even 3-400 rpm above peak hp rpm. A 26 will get you out of the hole a lot better too.
The following users liked this post:
SVT_Z06 (12-26-2018)
Old 12-27-2018, 09:45 AM
  #5  
SVT_Z06
Racer
Thread Starter
 
SVT_Z06's Avatar
 
Member Since: Aug 2010
Location: San Diego CA
Posts: 472
Received 9 Likes on 9 Posts
Default

Originally Posted by Halfvette
You wanna be going through the traps at or even 3-400 rpm above peak hp rpm. A 26 will get you out of the hole a lot better too.
Nice. I'll be stoked if I can kiss 6's and increase mph.
Old 12-31-2018, 01:55 AM
  #6  
sevinn
Safety Car
Support Corvetteforum!
 
sevinn's Avatar
 
Member Since: Jul 2009
Location: Baton Rouge LA
Posts: 3,755
Received 189 Likes on 175 Posts
St. Jude Donor '14, '16

Default

Your major issue here will be actually finding that 26" tire unless Mickey decided to start making it again.
Old 12-31-2018, 10:32 AM
  #7  
dieselracer
Instructor
 
dieselracer's Avatar
 
Member Since: Mar 2017
Location: SAN DIEGO CALIFORNIA
Posts: 200
Likes: 0
Received 15 Likes on 12 Posts
Default

There are a lot of variables here, are you taking about 28" to 26" radials? Slicks? from slicks to radials? Radials to Slicks? Etc.

for example, On my car, I had both 27" drag radials, and 28" slicks. I took the car to a good track, where I was hooking on both, While most will say the smaller tire will give you a faster ET due to gearing, In my case the car still ran faster on the Slicks than on the radials. Reason why is a bias ply slick is much lighter than the Drag Radials. The runs were done back to back, same day and both dead hooking. Even though bias ply slicks have more rolling resistance than a drag radial, the radials were also 2 inches wider per tire, so the rolling resistance might have been very similar. so at the end of the day, I was a couple hundredth faster on the slicks than on the radials.
Old 12-31-2018, 11:17 AM
  #8  
SVT_Z06
Racer
Thread Starter
 
SVT_Z06's Avatar
 
Member Since: Aug 2010
Location: San Diego CA
Posts: 472
Received 9 Likes on 9 Posts
Default

28 inch slicks to 26 inch slicks. Both bias ply.
Old 12-31-2018, 12:55 PM
  #9  
dieselracer
Instructor
 
dieselracer's Avatar
 
Member Since: Mar 2017
Location: SAN DIEGO CALIFORNIA
Posts: 200
Likes: 0
Received 15 Likes on 12 Posts
Default

Then it should net quicker times, but you will also have less available traction. So as long as you can hook on both then you should be fine. let us know how it goes.
Old 01-04-2019, 01:15 AM
  #10  
Schieby
Advanced
 
Schieby's Avatar
 
Member Since: Dec 2015
Location: Kempten Bavaria
Posts: 87
Received 9 Likes on 6 Posts
Default

Originally Posted by Halfvette
What rpm are you seeing at the finish and how much rpm drop between shifts now? I lost .3 going from a 26” to a 28” in my ctsv fwiw.
You lost .3 seconds on a C4 going from 26" to 28" ??
I drive 28" Hoosier QTP´s on my 85 Vette with the DNE 4+3. This makes me wondering if I should try the 26" diameter. What you think?
Old 01-04-2019, 07:09 AM
  #11  
SVT_Z06
Racer
Thread Starter
 
SVT_Z06's Avatar
 
Member Since: Aug 2010
Location: San Diego CA
Posts: 472
Received 9 Likes on 9 Posts
Default

Originally Posted by Schieby
You lost .3 seconds on a C4 going from 26" to 28" ??
I drive 28" Hoosier QTP´s on my 85 Vette with the DNE 4+3. This makes me wondering if I should try the 26" diameter. What you think?
CTSV, which is a Cadillac.

Get notified of new replies

To Gains going to a 26 inch slick from a 28




Quick Reply: Gains going to a 26 inch slick from a 28



All times are GMT -4. The time now is 11:06 PM.