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2.94-3.23 gears and an 833
#1569439
01/27/14 02:57 PM
01/27/14 02:57 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
OP
I Live Here
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OP
I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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I'm trying to optimize my combo on a budget. I'm ready to swap my 6.1 hemi in, but I can't swing a 5 or 6 speed yet. I've got several 8.75" chunks in 489 and 742 to swap to. I'm going to be running a strong 6.1 hemi with a stock Sachs clutch and steel flywheel. I'll have more than enough torque to move my car. Who here has run a 4 speed and 2.94-3.23 gears? I've got a 2.94 peg leg that I ran with a stock 440/727 and it was fine for the driving I do. (mostly highway) but now that I'm going to a new motor with my 4 speed, I'd like to take one step up in gearing. I drive 18 miles to work and I'd like to get to the roadcourse eventually. Acceleration from a stop isn't a concern since it wont have a good tire any time soon. Here is the info for Steff's motor...which will be very similar to my own. Torque wont be a problem. Quote:
Motor Details: Stock Short Block, Modern Cylinder Head ported 6.1 Heads, 358/240cfm @ .650 lift, Stock 2.08/1.58 Hollow Stem Valves, PAC Springs & related parts, Stock Rockers, Trend Pushrods, 5/16 x .080 wall, Performance Werks Racing Custom Hydraulic Roller to work with stock piston (no valve reliefs): 224/228 @ .050, .620/.640 lift , 112CL +2 , Drag Pack Intake, Proform HP950 Carb, Milodon Pan & Windage Tray, Firecore Prototype Coil Packs, 1 3/4 primary x 30” long dyno headers, ATI Drag Pack Damper, Meziere Remote Water Pump.
Dyno pulls were from 4500 to 6500 rpms.
Torque curve is very nice, starting at 472 ft. lbs. at 4540 rpm, peaking at 487 ft. lbs at 5258 rpm, then tapering off to 450.5 at 6454 rpm
Horse Power started at 408.1hp @ 4540 rpm & steadily climbing to a peak of 556.5 hp @ 6441 rpm.
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Re: 2.94-3.23 gears and an 833
[Re: autoxcuda]
#1569444
01/27/14 03:58 PM
01/27/14 03:58 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
OP
I Live Here
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OP
I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
What's the top speed that at end of straight for the track you want to go to? Same track as Ucoog? What was his top speed?
I bet about 130 down the front straight. He is shifting to 5th on his TKO. He is at Texas World Speedway. We were actually there this weekend. He gave some seriously expensive cars a very, very hard time.
I'd like to try at least a half mile standing course. I hope that with a 6600rpm redline I could go deep into fourth and keep accelerating.
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Re: 2.94-3.23 gears and an 833
[Re: AndyF]
#1569448
01/27/14 09:42 PM
01/27/14 09:42 PM
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Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
goldduster318
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,482
Lake Orion, MI
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I have a 340 with a 4-speed and 3.23 rear and it's fine. Just a little clutch slip at take off to make it smooth and everything else is fine.
My engine does make 400 lb-ft (gross) at 2800 rpm though. Pulls hard once you get to 2000 rpm.
'70 Duster 470hp 340/T56 Magnum/8 3/4 3.23 Sure-Grip
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Re: 2.94-3.23 gears and an 833
[Re: goldduster318]
#1569449
01/27/14 11:56 PM
01/27/14 11:56 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Ran an A833 with 2.94SG in my 87 Diplomat for years, just a 360 in front of it but I had no problems, 255/60-r15's. I'd imagine a 440 would have less problems.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: 2.94-3.23 gears and an 833
[Re: AlexP]
#1569450
01/28/14 12:44 AM
01/28/14 12:44 AM
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Joined: May 2005
Posts: 723
Houston Tx
Uhcoog1
super stock
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super stock
Joined: May 2005
Posts: 723
Houston Tx
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Quote:
I'm trying to optimize my combo on a budget. I'm ready to swap my 6.1 hemi in, but I can't swing a 5 or 6 speed yet.
I've got several 8.75" chunks in 489 and 742 to swap to.
I'm going to be running a strong 6.1 hemi with a stock Sachs clutch and steel flywheel. I'll have more than enough torque to move my car.
Who here has run a 4 speed and 2.94-3.23 gears? I've got a 2.94 peg leg that I ran with a stock 440/727 and it was fine for the driving I do. (mostly highway) but now that I'm going to a new motor with my 4 speed, I'd like to take one step up in gearing.
I drive 18 miles to work and I'd like to get to the roadcourse eventually. Acceleration from a stop isn't a concern since it wont have a good tire any time soon.
Here is the info for Steff's motor...which will be very similar to my own. Torque wont be a problem.
Quote:
Motor Details: Stock Short Block, Modern Cylinder Head ported 6.1 Heads, 358/240cfm @ .650 lift, Stock 2.08/1.58 Hollow Stem Valves, PAC Springs & related parts, Stock Rockers, Trend Pushrods, 5/16 x .080 wall, Performance Werks Racing Custom Hydraulic Roller to work with stock piston (no valve reliefs): 224/228 @ .050, .620/.640 lift , 112CL +2 , Drag Pack Intake, Proform HP950 Carb, Milodon Pan & Windage Tray, Firecore Prototype Coil Packs, 1 3/4 primary x 30” long dyno headers, ATI Drag Pack Damper, Meziere Remote Water Pump.
Dyno pulls were from 4500 to 6500 rpms.
Torque curve is very nice, starting at 472 ft. lbs. at 4540 rpm, peaking at 487 ft. lbs at 5258 rpm, then tapering off to 450.5 at 6454 rpm
Horse Power started at 408.1hp @ 4540 rpm & steadily climbing to a peak of 556.5 hp @ 6441 rpm.
Here are my thoughts:
833 1st gear = 2.47:1
tko600 1st gear = 2.87:1
viper t56 = 2.66:1
Rule of thumb for a drag car (not accounting for tire diameter) is 10:1 to 11:1 final drive in first.
833 first gear:
4.10 gear: 10.1:1 (51 mph 1st @ 6600, 26.2-26.5 tire height)
3.55 gear: 8.9:1 (59 mph)
3.23 gear: 8:1 (65 mph)
2.94 gear: 7.26:1 (71.7 mph)
tko600 2nd gear (1.89:1):
3.60 gear: 6.8:1 (76 mph)
tko600 1st gear:
3.60 gear: 10.3:1 (50 mph at 6600 rpm)
If you want to know what a 2.94 gear feels like in 1st, come drive my car starting from second.
FYI: Passon 5 speed will have a 2.64 1st gear.
2.94 gear: 7.76
3.23 gear: 8.5
3.55 gear: 9.3
You probably recall I've been looking at swapping to a 3.00:1 gear and a .82 OD in my tko.
8.6:1 1st gear (60 mph 1st gear)
Remember we've discussed many 'supercars' allow for 0-60 mph tests in 1st gear.
IMHO, I would pick your rear gear based on 1st gear redline and top gear redline. find a medium and call it good. If you get an OD added in, consider your cruising rpm at 75 as well.
I say go 3.23 or 3.55, (or 3.31 dana 60), but not 2.94.
-'02 Dodge Viper Ex-World Challenge racecar
-'73 Duster, 6.1 based 392 hilborn hemi, tko600, full floater rear 9", Hellwig custom bars, viper brakes, built for road course
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Re: 2.94-3.23 gears and an 833
[Re: goldduster318]
#1569453
01/28/14 02:29 AM
01/28/14 02:29 AM
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Joined: Jan 2003
Posts: 27,468
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Quote:
Quote:
Here are my thoughts:
833 1st gear = 2.47:1
tko600 1st gear = 2.87:1
viper t56 = 2.66:1
The A-833 could also be 2.66:1 1st. The A-body ones are and also I believe most others. IIRC, the T/As/AARs and some 70-up HP B/E cars have 2.47:1
72 and up A-body 833's are 2.47 1st. And maybe sometime in 1971 too??? I think same goes for B/E bodies???
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Re: 2.94-3.23 gears and an 833
[Re: AlexP]
#1569457
01/29/14 02:22 PM
01/29/14 02:22 PM
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Joined: Jan 2003
Posts: 27,468
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,468
So Cal
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Quote:
Could a 383/4 speed car have been geared with a 3.23?
From the factory? Yes.
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Re: 2.94-3.23 gears and an 833
[Re: autoxcuda]
#1569458
01/29/14 08:40 PM
01/29/14 08:40 PM
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Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,562
Downtown Roebuck Ont
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Quote:
Quote:
Could a 383/4 speed car have been geared with a 3.23?
From the factory? Yes.
That was pretty much the standard combo unless you special ordered something different.
Isn't there an 833 with a 3.09 first?
Kevin
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