i currently have 256 gears in my rear end if i switch to 373 gears will it make a big diffrence when i do a burn out i know it will make my car run on a higher rpm on the highway but im not really worried about that

Are you worried about the price of gas? You will be buying more of it with that switch. I was going to get rid of my 273 in my LeMans but I think I will keep it now.
Paul

Tony,yes they will make it a little easier to burn out..but,a high stall convertor is what really livens up burnouts :D

gas isnt the problem as i only take it out a couple times a month i just want to know if it will smoke the tires easier with the 373 gears as far as stalls is 2000 stall decent

Use this..

MPH = RPM x Tire dia. (in inches)/ REGR x 336

Play w/ it some and you can get RPM out of it.


And imho, I dearly LOVE my old 12-bolt's 3.31 posi-!!

pdq67

If your goal is better "burn-outs" get some bald tires and install a line-lock. Your car won't be fighting the rear brakes and this will be easier to install then new gears.

Yes it will help - I went from 2.56s to 4.10s and it was easier to turn tire for sure. :yes:

You will love the new gear in town - highway revs will be high.

put some pizza cutters on the rear and you can smoke them real good

do you guys hold the brake down when you burn out ? and is it ok to to that

do you guys hold the brake down when you burn out ? and is it ok to to that

For a second or two to get the tires going.Won't hurt anything
But,with a 2700-2800+ stall you won't have to :D
Just punch it :thumbsup:

For a second or two to get the tires going.Won't hurt anything
But,with a 2700-2800+ stall you won't have to :D
Just punch it :thumbsup:

Or just pop the clutch! :D

a high stall is next on the list 2500 or 2700. im running a stock stall now

I just switched from 3.55s to 4.11s. Though this isn't what your switch is, I can tell you the difference is HUGE. I've also run 4.56s before. My dad's Camaro had a TH350 and 3.73s and it drove real nice. I think you'll see (and feel) a huge difference. Even a 3.55 would be good. Kind of a compromise. I really like the 3.55s in my Chevelle for the street.

Dude, I went from 4.10s to 2.73s, kind of the opposite of what you're doing to the extreme. I could not use 1st gear at all with the 4.10s and it would get sideways going into 3rd if you stayed in it. I have huge meaty 275/60s on the rear too, it would liquify them with anything more than 1/2 throttle. Also, say goodby to gas mileage, although you have already stated that you don't care about that. I went from 7-9 mpg to 13-14 and I only put 2000-2500 miles on the car a year. But yeah, making that gear change will make it seem like it has 100 more horsepower.

BTW, 'brake-standing' always reminds me of a classmate of mine with a weak-@ss 229 v-6 Monte Carlo who would pound the heck out of his car to get it to squeak one rear tire for about three feet. IMHO, if you can't break 'em loose with just torque from a standstill, you need more torque.

i breaks them loose but it all depends on the pavement. it smokes the crap out the tires but only on the pavements in parking lots. you know when the paint on that black tar like crap. on the street it doesnt sit n spin not like i want it too. it does a nice smokie burn out when i turn and stand on it. im running a 350ci with 330hp / 400 ft.lb its no punk by far. with the 256 gears it just isnt doing it justice. but from what you guys said a gear & stall swap should change all that

I dearly LOVE my old 12-bolt's 3.31 posi!

Drag, a short WIDE tire like my old L-60/14's that measure a modern 298/53-14!!

Hwy, a tall skinny tire like my old Firestone, Town&Country 9.50/14 mud&snow at 29.5" tall.

The 29.5" tall tires under my 1st Gen. Camaro car made my speedometer go from 3050 rpm at 70 mph to 82 mph!! W/ a topend of like 145 mph!!

pdq67

Just wanted to clarify. I wasn't saying that I thought you should put in 4.10s. That's too low for the street for sure IMO, unless you have overdrive. 3.55s and a 28" (275/60/15) tire works great.

I just switched from 3.55s to 4.11s. Though this isn't what your switch is, I can tell you the difference is HUGE. I've also run 4.56s before. My dad's Camaro had a TH350 and 3.73s and it drove real nice. I think you'll see (and feel) a huge difference. Even a 3.55 would be good. Kind of a compromise. I really like the 3.55s in my Chevelle for the street.


Keep us posted how the swap from 3..5's to 4.10's work out ET wise. I have been considering going from my current 3.50's to 3.89's. Thanks!

the trans is a 700r4 but im thinking some where in the area of 373 gears

Switching to 3.73's in my 'velle really woke her up. My conv. 68 had a 400 sbc and 3.08 gears. I went to 3.73's and the difference was night and day. :yes:

by the way what better for the street limited slip or spools

limited slip.
spool not recommended from what I have heard.

thats what i hear too

Spools on the street are no good. I've driven a car with a 4.88 cogged spool rear on the street, not easy to turn.
FWIW, if that car can't do burnouts with that much HP and torque, an open end rear, something is wrong, even with 2.56 gears. My 69 Malibu with a stock 307/PG, and 2.73 gears can do burnouts, you're car should be able to as well with little effort. Even when my 86 Cutlass had a stock 307 Olds boat anchor and 2.14 gears, it was able to do a decent burnout.

You have a 700R4 tranny. With the 700r4's 3.06 1st gear ratio, 2.56 rear gears would be like having a 3.11 rear end and a TH-350 tranny (2.52 1st gear).

Switching to 3.73 rear gears would be like having a TH-350 with 4.53 rear gears (in 1st gear). Depends on what you are looking for. I have a 700r4 with 3.36 gears and I am changing to 3.08's because it has too much 1st gear for my taste. It helps that I am running a big block (plenty of low end torque).

maybe some things wrong with my right foot