[grampa_ss]

Question for you drag racers out there.

Car = 2016 Camaro SS A8

All things being equal with NO traction issues, what would be the quicker 1/4 mile... A 26" tire or a 28" tire? My assumption is the 26" tire would have a quicker 60' but slower trap speed vs the 28" tire. I'm only guessing as the shorter tire would lower the gear ratio.

But which would run the quickest 1/4 mile?

[Tcamaro]

What trans? I think with on a stock car would be a 26" but on a power adder car I think the 28". There are different rear gear ratios from manual to auto.

[grampa_ss]

Originally Posted by Tcamaro

What trans? I think with on a stock car would be a 26" but on a power adder car I think the 28". There are different rear gear ratios from manual to auto.

It's there where I said "2016 Camaro SS A8".
I'm talking N/A. Not sure it matters in this comparison.

Take a stock Camaro A8..run it 5 times on 26" and 5 time on 28"

What's quicker?

[Snowblind]

Originally Posted by grampa_ss

It's there where I said "2016 Camaro SS A8".
I'm talking N/A. Not sure it matters in this comparison.

Take a stock Camaro A8..run it 5 times on 26" and 5 time on 28"

What's quicker?

On a stocker the 28. The 26 may get you a quicker 60' but it will requires a shift before the line which will cost you time.

When the mods start...the pendulum swings.

[PRAY]

Not to disagree with Snowblind since I absolutely respect his experience and opinion. BUT, I will go with 26" the entire way. My findings running the 28's are that you have to execute that 4th shift into 5th regardless if you are trapping 114 mph or more. I am pretty sure we had a long discussion about this some time back. The 26" tire takes your rear gear from a 2.77 to a 2.97. When we take the accumulation of all the shifts and the time the car will stay in each gear and in the power band of this car, I see the 26" tire as the hands down winner. We know this car stock or with the stock heads and stock manifold is all about tq. It flops over around 5,700 so the more we can multiply tq the better off we are. I also think it will MPH better since it will execute the 4/5 shift sooner and be back in the power band in 5th sooner running out the back door.

[DFW1LE]

I am assuming the 26" would also benefit the M6 cars by improving 60' times. What say you experts?

[Pro Stock John]

Shorter tire will act like more gear. Car would be quicker on a shorter tire.

[396ssrat]

The longer footprint of the larger diameter tire will provide better traction. Assuming your Nannies don't interfere.

[PRAY]

Originally Posted by 396ssrat

The longer footprint of the larger diameter tire will provide better traction. Assuming your Nannies don't interfere.

We all agree with that but the op stated traction was even or not a factor. Pure mechanical advantage.

[grampa_ss]

Originally Posted by 396ssrat

The longer footprint of the larger diameter tire will provide better traction. Assuming your Nannies don't interfere.

True, but being stock and an A8, I leave at an idle. Don't need the bigger footprint yet.

[grampa_ss]

Right now I'm on a 275/40-20. it's basically a 29" tire (28.82 to be exact). I can run 4th gear to the finish, I didn't need to shift into 5th. I trapped at 111. This was in Vegas, the DA was around 2900.

I'm thinking a 26"-27" setup will be better & quicker.

[PRAY]

Originally Posted by grampa_ss

Right now I'm on a 275/40-20. it's basically a 29" tire (28.82 to be exact). I can run 4th gear to the finish, I didn't need to shift into 5th. I trapped at 111. This was in Vegas, the DA was around 2900.

I'm thinking a 26"-27" setup will be better & quicker.

That makes sense. If you are running a stock height tire (26.83) or just near it. You will have to shift to 5th. Even with my ETr 28" (27.5) I still had to shift to 5th. Possibly on a real 28" tire bone stock you could hold 4th. I still think the shorter tire will be quicker.

[Snowblind]

Originally Posted by PRAY

Not to disagree with Snowblind ........

You're allowed to homie, nobody should be butt hurt over a different view....it doesn't make one person right and one person wrong, it's just an opinion.
I appreciate the openness of all your findings too.

Originally Posted by grampa_ss

Right now I'm on a 275/40-20. it's basically a 29" tire (28.82 to be exact). I can run 4th gear to the finish, I didn't need to shift into 5th. I trapped at 111. This was in Vegas, the DA was around 2900.

I'm thinking a 26"-27" setup will be better & quicker.

Your 28.82 tire will run you out to almost 121mph in 4th, we did go over this extensively last year on the forum....feel free to dig into some old threads and grab a bag of popcorn bro....I run a 28.7 myself and I could be "strong and wrong" but i've cut more 1.68's when it was stock tuned than I can recall.

Pray did state way back when that the 4-5 shift takes about .3 seconds to complete. I haven't looked into it that deeply but I will take his word for it. I have, however, experimented extensively with holding 4th and my math told me that I gained almost .04 in the 1/4 and gained 2-3 mph at the traps.

In light of your more recent post, if you choose not to get bit by the speed bug and mod your car than look for a shorter tire, IMO you will see nominal differences between the 2 until your pour on the power anyways but good luck with whatever you choose.

Nice car btw...the white ones are the fastest

[PRAY]

Originally Posted by Snowblind

You're allowed to homie, nobody should be butt hurt over a different view....it doesn't make one person right and one person wrong, it's just an opinion.
I appreciate the openness of all your findings too.



Your 28.82 tire will run you out to almost 121mph in 4th, we did go over this extensively last year on the forum....feel free to dig into some old threads and grab a bag of popcorn bro....I run a 28.7 myself and I could be "strong and wrong" but i've cut more 1.68's when it was stock tuned than I can recall.

Pray did state way back when that the 4-5 shift takes about .3 seconds to complete. I haven't looked into it that deeply but I will take his word for it. I have, however, experimented extensively with holding 4th and my math told me that I gained almost .04 in the 1/4 and gained 2-3 mph at the traps.

In light of your more recent post, if you choose not to get bit by the speed bug and mod your car than look for a shorter tire, IMO you will see nominal differences between the 2 until your pour on the power anyways but good luck with whatever you choose.

Nice car btw...the white ones are the fastest

Good points once again. The 4/5 shift takes .3 with TM off. Stock it takes about .6. So holding gear if you can will cover that for sure.

We need Bhilla to chime in. As far as I know he is the only one who actually has run both tires. IIRC, he went 11.2's on the 28's and then 10.9's on the 26's as the only change.