Hot Rods final drive ratio for burnouts :)

what’s going on guys, out of curiosity i had a question about final drive/ rear axle gear ratios. i have a 327 small block (originally 250 horsepower) now closer to 350/375 horsepower. in my rear end right now i have 2.73 gears (open diff) and can’t get that one tire to spin for shit. it’s a 225/60/15 tire so it has a bit of meat but still, i thought i’d be able to get it to let loose. i bought a kit that comes with 3.55 gears and a posi that i will be putting in sooner or later. do you guys think that a posi and 3.55 will help or will i still have trouble?


Sent from my iPhone using H.A.M.B.

 

The gear ratio will probably help, but the posi will hurt.

There are a lot of other variables, you know....we don't even know if you have a manual or automatic transmission, what kind of tires you have, what kind of car it is (heavy, light, wagon, T bucket, ????)

 

I think you are off on your horsepower estimate.
My OT '72 Formula 350 Firebird is rated @ 180 HP and has a 2:73 posi differential, and 245/60 tires.
It will smoke the tires from a dead stop until it shifts to second gear.
Really there is no good reason other than to show off to smoke your tires.
I am not so well off that I want to ruin a rear set of tires any way.
KK

 

Crank up the initial advance.

 

Put a motor in it that will break the tires loose at 60 mph ,then you'll be able to do all the burnouts you want ....

 

Burning rubber costs $$$$$....

 

Find a water puddle or some gravel and then grow up!

 

Don't think we'll see him again.....

 

ouch.. lol i have a power glide, the car is a 65 chevelle sedan.


Sent from my iPhone using H.A.M.B.

 

i tried both but haven’t gotten any older


Sent from my iPhone using H.A.M.B.

 

65 chevelle,18 years old.Most of us did this at that age.

 

power glide in a 65 chevelle malibu sedan


Sent from my iPhone using H.A.M.B.

 

There must be something wrong with your motor. It should light up that tire. Have an old guy show you how it is done!

 

PG 273 R and P car stock 1965 chevelle will not spin a tire without a neutral drop

 

Reverse roll comes to mind.

 

That too.

 

I have a powerglide with a 300something 350 and 3:70 gears..I can smoke em good.

 

I find it hard to believe that folks don't genuinely enjoy a good, smoky burnout now and again.

 

I had a 3.08 gear in this 4000 pound beast. I did not have my foot on the brakes and was running 235/70/R15 Coopers.

 

Your problem is the powerglide. Get a turbo 350 or aod

 

A powerslip will work fine if you boost the line pressure.

 

5.13:1

 

with that gear you could roast the tires with a Briggs n Straten

 

stand on both pedals, or get a brake line lock for the fronts only

Not quite! My old jeep had 5.38 gears, it wouldn't chirp the tires unless I dumped the clutch at full throttle, a blistering 3400 RPM. haha! Fun spinning around on dirt though!!

 

Best thread ever!

 

what is the difference that will help with doing burnouts? i understand turbo 350’s have 3 gears instead of 2 but why specifically will it help with burnouts?


Sent from my iPhone using H.A.M.B.

 

I have a 65 Valiant that had a stock 318 and 2.72:1 gears and it had no problem...maybe it’s a Chevy thing.


Sent from my iPhone using H.A.M.B.

 

And 13” tires! Hence the smiley face.


Sent from my iPhone using H.A.M.B.

 

And here I thought it was the power the worn out 318 had.


Sent from my iPhone using H.A.M.B.

 

that one hit deep into my heart


Sent from my iPhone using H.A.M.B.