Gear ratio for Turbo aplication !

Help me beat some more this dead horse !

For what I read and know, lower gear ratios are a no-no for boosted aplications.

Lot of reasons here, but the one most builders tend to point out is loading the engine in order to make boost.

And the other main reason tends to be traction.

If we go to basics of 1/4 mile, we want to pass in the shortest time posible.

If we have a drag dedicated car, we will want to pass 500-1000rpm before hitting the rev limiter 1:1

Now, if we have a 4wd drag car, that has non to minimum tire spin, and because of it's weigth (4500lbs) and the resistance that all the drive line puts to the engine.....will it load the turbo?

Top this with the long 1st gear from the 80e.

And pretend the gear change is minimal, like 3.73 to 4.10

Will this gear ratio swap give lower ET's ?

i think so. I think too high of a gear is still hurting you even with boost. I love my 3.70 gears. and would not even consider going higher, I would go lower if anything. as long as it makes the desired boost, it is loading enough imo. just my .02

ill sell u some 3.23s oem haha

I'm still in denial !!!!

I'll wait for 04chase to swap to 3.73 from 4.11

He has some good times on 4.11 awd

Let's see if the higher gears will make a positive difference !!!!

Subscribed. I'm trying to figure out what gears to run in my turbo 5.3 w/80E. 4.10's combined with the 80E 's 2.48:1 first gear is equal to "3.32's" and the 60E's first gear. I just want to make sure the truck will pull a decent 60' time.

with the 5.3 the 410s should work well

My truck went faster with 4.10s than 3.42. However for daily driving you can't beat the 3.42s. If it helps you any it mph 126 on 4.10 and 122 on 3.42.

i can back that up i lost 5 mph in the 1/8 going from a 4.88 to a 4.10 the 1320 mph was the same but ET dropped greatly

Quote:

---

Originally Posted by Tarinitup1

My truck went faster with 4.10s than 3.42. However for daily driving you can't beat the 3.42s. If it helps you any it mph 126 on 4.10 and 122 on 3.42.

---

i have 3.73s and want to go to 4.10s FWIW

Im glad I already have 4.10's, hope they work well for me.

Quote:

---

Originally Posted by sprayedenali

i have 3.73s and want to go to 4.10s FWIW

---

:burns:

I went faster in the avalanche with 3.42's vs 4.10's. Went down to 3.73 and got close times to the 3.42's. Still have the 3.73's for all around driving.

Quote:

---

Originally Posted by farmtruc

I went faster in the avalanche with 3.42's vs 4.10's. Went down to 3.73 and got close times to the 3.42's. Still have the 3.73's for all around driving.

---

no brainier you went faster with 3.42 vs 4.11

I'm targeting quicker time wise, not mph. It is suppose to be a non DD. So frackup the fuel economy.

So the get further in the analysis, 4.10 vs 3.73. When did Boost came up, rpm related? When did full boost hit, RPM related? What RPM did you hit the trap? tire diameter? Full slicks or DR? amount of tire spin? Converter Stall?

C'mon dude, elaborate. (don't do the bicycle-Midget twin example again ) lol

stand by for my results.

427 lsx turbo with awd and 4.10's with a loose converter going to 3.73 and a tighter wot lockable verter . this will allow me to stay in 3rd gear with the 28.8 drag radials.