2.94:1 gearset

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ir3333

ir3333

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any body using 2.94"s?
what's your build and how do you like them?
How's the performance?
 
A car with lots of low end torque such as big inch big block,2.94 can be a good compromise.It can give you a nice cruise speed. I've run them in cars from Slant Six to 472 Hemi's.Now for drag racing,not the best. My slant car with a 25'' rear tire, shifting at 5200 would go thru the traps in second gear(automatic). The Hemi Car had 3.91's and was a tire fryer.We switched to 2.94 just to see and it did remove some power at the bottom using a 28'' tire also with a automatic.Top end was unlimited and a bit scary in a 64 Savoy with drum brakes. I guess you have to see what the intent use of the car is going to be.For me street driving, 3 miles in any direction the speed limits are 65-75 mph and the 2.94 was nice for running at those speeds.Usually adding about a +10 mph to keep up with traffic. Those are just my findings that worked for me.
 
my dart had a 2.94 with a basically stock 73 360. loved it. peppier around town then i thought and could cruise at 80mph with no problem.. the same gear is in our slant 6 dart now.. seems fine to me.. can cruise 75mph nicely.
 
I swapped 3:23 from 2:92 into mine about six months ago. 273 Commando.

It has much more pickup from the run then the 2:92's. It just couldn't get out of it's own way before. Now I can stomp it at 45 mph and it gets!!!!
 
I run this gear with a 4 speed and my small block stroker. Great combo for torquey motor. The factory had it right as this was the combo with a 360 in a bodies.
 
I ran it for awhile. It was ok. I had a 3.09 low, which computes to a 9.08 starter gear, which is the same as a 2.66 low and 3.42s. But that gear needs a torquey motor, once you hit third.Its a nice compromise between adjacent ratios.Especially so if you have an auto and a 360. Not so good with a teener and a big cam.
 
318/904/2.94 with small cam. I have some 3.23s but, been having other issues to deal with. It does OK and cruises good but, it isn't a tire burner. I noticed a little change from the 7 1/4 with 2.76s.
 
2.94 is a really common 8 3/4 gear in 66/67 B body cars.

My 66 Coronet poly 318 had that gear.

It was great on the street versus the common gm 3.08 gear behind a stock or mild 350.

The poly could out torque (or at least keep up with) the 350, and the 2.94 would eventually walk the 3.08.
 
anybody with a stock 340 running them in an A body?
.. or an RV cam in a 340 with this gear?
 
2.94 to 3.23 is a measly 200 rpm difference..... not sure what this helps with even a slant ....

It get what exactly? 200 rpm more....
 
^^Kindof an ambiguous statement.
The difference is actually 9.864%. so at 6000rpm the difference is 600ish rpm. Some of the Mopar smaller gears are around 10%.After 3.55 it tightens up to around 5%.
Here is a breakdown;
2.45 to 2.76 =12.65%
2.76 to 2.94 =6.5%
2.94 to 3.23 =9.86%
3.23 to 3.55 =9.9%
3.55 to 3.73 =5.1%
3.73 to 3.91 =4.8%
3.91 to 4.11 =5.1%
4.11 to 4.30 =4.6%
4.30 to 4.56 =6.0%
 
^^^ How much porting/cam/stroking of the engine, and the associated cost, would it take to get 9-10% more torque at the tires? I'm not a big fan of steeper final gearing (due to use and interest), but it does have its place.
 
I am currently rung 2.94s behind a stock 69 318 with a street dominator, 625 Edelbrock carb, 340 exhaust manifolds and dual exhaust. It has a 2200 stall converter and I built the 904 with the low first gear. It works really well.
 
.. too many guys throw a large duration nasty idling cam in and end up disappointed.
mguner....yours sounds like a well thought out package
 
mguner said:
I am currently rung 2.94s behind a stock 69 318 with a street dominator, 625 Edelbrock carb, 340 exhaust manifolds and dual exhaust. It has a 2200 stall converter and I built the 904 with the low first gear. It works really well.
Click to expand...

See, thats how its done.
Free up the exhaust, open up the breathing, keep the Dcr up and a wide powerband with the stock cam. Give it a low 1st gear and a reasonable rear gear.BA-DA-BOOM.
I have built several personal rides like that, usually with a TQ, and upped the rev-ability with a bit of extra springing.
Good job!
 
ir3333 said:
.. too many guys throw a large duration nasty idling cam in and end up disappointed.
mguner....yours sounds like a well thought out package
Click to expand...

I was lucky enough to have a low mileage (44K) 69 Fury donor. I remember how well my old 79 5th Ave ran with 2.45s and the low first gear tranny. The rear end I borrowed from a 67 Coronet was already fitted with 2.94s so I didn't have to think too hard...
 
I run a 2.76 in an 8.75 with my 4 speed '69 340 Dart with Mopar Performance cam P4452761 and I love it. Did 3 legs of HOTROD Power Tour with these gears and it was an awesome cruising gear.


Cam Style:
Hydraulic flat tappet


Basic Operating RPM Range:
1,500-5,800


Intake Duration at 050 inch Lift:
228


Exhaust Duration at 050 inch Lift:
231


Duration at 050 inch Lift:
228 int./231 exh.


Advertised Intake Duration:
268


Advertised Exhaust Duration:
272


Advertised Duration:
268 int./272 exh.


Intake Valve Lift with Factory Rocker Arm Ratio:
0.450 in.


Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.455 in.


Valve Lift with Factory Rocker Arm Ratio:
0.450 int./0.455 exh.
 
AJ/FormS said:
^^Kindof an ambiguous statement.
The difference is actually 9.864%. so at 6000rpm the difference is 600ish rpm. Some of the Mopar smaller gears are around 10%.After 3.55 it tightens up to around 5%.
Here is a breakdown;
2.45 to 2.76 =12.65%
2.76 to 2.94 =6.5%
2.94 to 3.23 =9.86%
3.23 to 3.55 =9.9%
3.55 to 3.73 =5.1%
3.73 to 3.91 =4.8%
3.91 to 4.11 =5.1%
4.11 to 4.30 =4.6%
4.30 to 4.56 =6.0%
Click to expand...

How do you figure 2.94 to 3.23 is 600 rpm ?
It is 200 rpm, not anywhere near a 600 rpm difference. If you wanted a 600 rpm difference then you need a 3.80.. Not a 3.23 .
.

.
 
I had 2.94's in my 87 Dakota with an a998 trans. Mild built magnum 5.2 with the v6 converter still in it from the v8 swap. (2000 stall). 3800 lbs with me, ran 13.69 @ 101 with a 2.09 60 foot time. I really like it too, could hold 2nd gear to 100 mph. I shifted at 6200. Now I have an a500 trans with 4.10's.
 
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