[PRAY]

Originally Posted by ULTRAZLS1

5th gear is 1.27. My calculator says 130 mph 5th gear 6500 rpm 28 tall tire.

Yeah leaving in 2nd on that combo would be interesting.

My money is on Jim’s combo being the best.

According to the ECM it is 1.29 but I will double check.

[ULTRAZLS1]

Originally Posted by PRAY

According to the ECM it is 1.29 but I will double check.

Interesting

Just going off the chart I seen on here of the trans ratios.

[PRAY]

Originally Posted by ULTRAZLS1

Interesting

Just going off the chart I seen on here of the trans ratios.

I could be wrong. But I used the 1.27 originally and it didn't match what I was actually seeing. And that is on the Mickey Pro which is an actual 28" tall tire. The 305 Mickey R is only 27.5" on the car and all the 26" tires I have seen are 25.7" or shorter on the car at race psi.

[ULTRAZLS1]

Originally Posted by PRAY

I could be wrong. But I used the 1.27 originally and it didn't match what I was actually seeing. And that is on the Mickey Pro which is an actual 28" tall tire. The 305 Mickey R is only 27.5" on the car and all the 26" tires I have seen are 25.7" or shorter on the car at race psi.

Good info thanks

[danhr]

Originally Posted by PRAY

3.73 with 26" tire leaving in 2nd would be legit. Trying to leave in 1st would be a hot mess.

Call me crazy but I would still try 1st.... even though 2.97 is a "normal" cars first gear... i have always been an advocate of "dont fear the gear."

Originally Posted by ULTRAZLS1

I don’t think any gear and tire combo that requires an extra shift/shift into 6th is optimal.

Optimal gear is crossing the traps at or near redline in 5th. A 28 tall tire and 3.27 gear is the best bolt on combo. IMO

The age old rule that i was taught and follow is that perfect gearing has you going through the traps at or maybe a few hundred rpms above redline, in 1:1.

But I've never raced anything with 6 power gear though.

[oldman]

Originally Posted by danhr

Call me crazy but I would still try 1st.... even though 2.97 is a "normal" cars first gear... i have always been an advocate of "dont fear the gear."



The age old rule that i was taught and follow is that perfect gearing has you going through the traps at or maybe a few hundred rpms above redline, in 1:1.

But I've never raced anything with 6 power gear though.

Agree on the gear,

Automotive Physics would dictate that you should go through the traps at peak HP as it would yield the most HP under the curve. but realistically MPH changes at the end yield minimal ET changes.

I'm old and on a 440 if you tried to go thru the traps a few hundred rpm above redline, you would have a rod through the block.

[ULTRAZLS1]

He already tried a 3.73 with a 28 and using 6th gear. He went faster with the 3.27.

Maybe a 26 would be better idk


But hey that’s why I’m still waiting and on stock gears and converter lol. I’m not totally sold on anything yet.

I’ll probably be using a 4c on stock gears with 26 tall tires in the spring and then make up my mind on gears. May even stay with the stock 2.77 idk

[danhr]

Originally Posted by ULTRAZLS1

He already tried a 3.73 with a 28 and using 6th gear. He went faster with the 3.27.

Maybe a 26 would be better idk


But hey that’s why I’m still waiting and on stock gears and converter lol. I’m not totally sold on anything yet.

I’ll probably be using a 4c on stock gears with 26 tall tires in the spring and then make up my mind on gears. May even stay with the stock 2.77 idk

Not trying to blow up snowblind on the spot here, but going off his facebook posts he made a few other changes when he swapped rears, so you cant actually quantify how much of that gain (if any) was from switching gears.

From the sounds of his vids, he crosses the traps near redline with the 3.27s on a 28". With 3.73s you are only partially in 6th gear when you cross the traps. Like around 5600 rpms.... with 26s, you would be around 6200 rpms.

Unless someone wants to show off their money and run 28s with 4.10s in a 9"

[ULTRAZLS1]

Originally Posted by danhr

Not trying to blow up snowblind on the spot here, but going off his facebook posts he made a few other changes when he swapped rears, so you cant actually quantify how much of that gain (if any) was from switching gears.

From the sounds of his vids, he crosses the traps near redline with the 3.27s on a 28". With 3.73s you are only partially in 6th gear when you cross the traps. Like around 5600 rpms.... with 26s, you would be around 6200 rpms.

Unless someone wants to show off their money and run 28s with 4.10s in a 9"

That’s why I’m still not totally convinced of anything. Looking forward to your results with the 3.73. Just saying at this point I would go with/leaning 28 and 3.27. Was thinking that long before his results

But Like I’ve said I’ve made no decisions yet. And I’ll likely try the stock gears with a 4c to start next season

[danhr]

Originally Posted by ULTRAZLS1

That’s why I’m still not totally convinced of anything. Looking forward to your results with the 3.73. Just saying at this point I would go with/leaning 28 and 3.27. Was thinking that long before his results

But Like I’ve said I’ve made no decisions yet. And I’ll likely try the stock gears with a 4c to start next season

I wouldn't hold your breath waiting on results on my car. Lol. I have made one pass the past 6 attempts to go to the tracks. That's plural... tracks... I've been hitting TnTs at two different tracks trying to get a pass in.... weather just wo t cooperate.

[ULTRAZLS1]

Originally Posted by danhr

I wouldn't hold your breath waiting on results on my car. Lol. I have made one pass the past 6 attempts to go to the tracks. That's plural... tracks... I've been hitting TnTs at two different tracks trying to get a pass in.... weather just wo t cooperate.

Damn... and I’m still annoyed that last weekend was a bust for me lol. Hope your luck turns around !

[Snowblind]

Originally Posted by danhr

Not trying to blow up snowblind on the spot here, but going off his facebook posts he made a few other changes when he swapped rears, so you cant actually quantify how much of that gain (if any) was from switching gears.

From the sounds of his vids, he crosses the traps near redline with the 3.27s on a 28". With 3.73s you are only partially in 6th gear when you cross the traps. Like around 5600 rpms.... with 26s, you would be around 6200 rpms.

Unless someone wants to show off their money and run 28s with 4.10s in a 9"

I hurt the 3.73 when I toasted the driveshaft this spring, it is usable but wasn't in good enough shape to daily drive it so that is why I went and bought the 3.27 unit. I have faith that if I still had the 3.73 in it that I prob would have run the same time, I may even put it back in and make a pass this fall to see....I was waiting to see how you did with yours first Dan before I did though.

I am skeptical on starting out in 2nd gear with a bolt-on only car, big power cars can pull that off but I don't think we can imo, try it and see, who knows. As we all know the 1:1 gear makes the most power and the 3.73 in an A8 gets there, I've done the experimenting and it costs approx .03 in e.t. and possibly 2 mph to complete the shift vs not having to shift close to the traps.

Imo if Dan can stand on the brakes and leave at 3500 rpm (prep permitting) and his tune is lined out, he could tickle 1.3 60' . A 26" tire along with a 3.73 makes me skeptical that the tires will hold, Fall Brawl is coming up and maybe someone will volunteer to make a wheel swap for discovery purposes.

[danhr]

Note to self: if I cut a 1.3x 60'...... dont tell snowblind.