lordmetalz28

when switching from 2.73 to 3.73 what should i expect alot more torque or a little more. and at higher speeds and rpms also. is this a bid mod should i pick up a few 10,s

angel71rs

It will be a big change. Your engine will rev a lot quicker, but traction will be an issue. That large a gear change can cut 1/2 a second off your ET. It all depends on the setup.

kevin 2.8

in a nutshell its going to take less time for the car to run through a gear

ZZ430RS

You also might not gain anything, your engine has to be able to take advantage of the extra RPM, I've seen guys with stock engines install 3.73's or lower and actually go slower at the track, but it (feels) quicker off the line. You have to research and get the package right.

Black6SpdTA

Gears don't add or take away torque. The motor puts out X hp/tq and will still put out X hp/tq. It will, like angel said, just let the car rev quicker. Thus, like Kevin said, go through the gears quicker.

You will probably pick up a few tenths seeing your car isn't too mod'ed. Highway--all you'll see is more RPM. I can't comment on top speed or 50mph rolls without knowing what RPM you'll be turning (I know there's a calculator for that on TGO but I'm lazy ). Figure if it puts you in your powerband...you're good to go

aklim

It will be quicker off the line and suck more gas. Unless you have the camshaft that would take advantage of it, you might as well go to something like 3.23.

AutoRoc

Yep! What he said! 3.42 even if you plan on more engine mods, more rpm via different intake manifold, etc. Goodluck!

I went from 3.08's to 3.73's and honestly It looked faster watching the tachometer but 1/4 mile wise it was no more than a 1/10th quicker. The stock cam/head setup really killed upper rpm power even after going to a carb intake which is supposed to be good well past 5500rpm.

Like a hot chick...she's just gotta have the whole package or she just sucks.

aklim

A hot chick sucking would be good. The engine needs to be able to breath at that higher RPM and if the intakes don't allow it or the heads or the cam, all you will have is some gain but not the full potential.

lordmetalz28

cool, in due time in due time, im not made of money, but in due time the motor will be worked

aklim

If you are planning mods in the future, you could go with the 3.73s now and when the mods are done, it will be ready to go.

lordmetalz28

exactly aklim, but i figure before making a massive engine, make everything be able to handle it first. after this spring my rear will be almost bullet proof. next spring is my tranny rebuild with higher stall converter and shift kit. then will drop heads cam and steath ram in all at once and will also have piece of mind that the rest of the componets can handle this engine.

aklim

Sounds like a plan to me unless the engine takes a dump first then you might as well do it all at once. Before you do the heads and cam, make sure it is not problematic. Make sure you get good oil pressure or it is a sign of bad bearings. Make sure the leakdown test is good otherwise you might need other work. You don't want to spend money with the heads and cam only to find out 2 weeks later that the engine is shot.

Botch

My Stock L98 92 z28 picked up 4 tenths switching from 3.23s to 3.73s with no other Mods. I used the same tires (BFG D/Rs) and my 60' went from 1.96 to 1.815. The steeper gear will make it quicker if you can hook it up.

lordmetalz28

michellne pilots i wont spin for long i didnt even spin a full revolotuin on my 2.3 60ft just a small chirp

AutoRoc

Hey Botch... Did you lose or gain any MPH when you did the swap? That 60 foot drop alone equals .25-.3 in the full 1/4 alone Good to hear.