|
better gears for more purpose use but power to.
#1126909
12/03/11 11:28 PM
12/03/11 11:28 PM
|
Joined: Jun 2008
Posts: 768
Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
Ok i have a 1966 plymouth Satellite with a 600 hp motor i changed over to a A-833 trans with a 8 3/4 rear with a 489 chunk & 391 gears yes its a posi when i am crusing in forth and hit third hard it hits the rev limiter fast i want more rpm would 3:55 be better or 3:23 any ideas.!
Old car are me......
|
|
|
Re: better gears for more purpose use but power to.
[Re: 67coronetman]
#1126911
12/03/11 11:53 PM
12/03/11 11:53 PM
|
Joined: Aug 2003
Posts: 43,121
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,121
Bend,OR USA
|
Quote:
Ok i have a 1966 plymouth Satellite with a 600 hp motor i changed over to a A-833 trans with a 8 3/4 rear with a 489 chunk & 391 gears yes its a posi when i am crusing in forth and hit third hard it hits the rev limiter fast i want more rpm would 3:55 be better or 3:23 any ideas.!
Two things, what do you set the rev limiter at? 2nd, is it spinning the tires when you hit it in third gear? Mine does,(727 with a loose converter) if I'm not careful on the loud peddle application  4.10 gears, 13.5x30x15 M/T ET Streets  I have my rev limiter set at 8000 RPM, I shift it at or close to 7300 RPM, it runs a 134 MPH in the 1/4 mile crossing the finish line at or close to 7000 RPM
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: better gears for more purpose use but power to.
[Re: Cab_Burge]
#1126913
12/04/11 12:37 PM
12/04/11 12:37 PM
|
Joined: Jun 2008
Posts: 768
Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
Yes it did spin very good even into forth gear! & my rev limiter is at 6000 rpm.
Old car are me......
|
|
|
Re: better gears for more purpose use but power to.
[Re: dOc !]
#1126914
12/04/11 12:38 PM
12/04/11 12:38 PM
|
Joined: Jun 2008
Posts: 768
Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
I was seriously thinking of 3:55 or 3:23 gears.
Old car are me......
|
|
|
Re: better gears for more purpose use but power to.
[Re: 67coronetman]
#1126915
12/04/11 12:54 PM
12/04/11 12:54 PM
|
Joined: Feb 2005
Posts: 4,311
Prospect, PA
BSB67
master
|
master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
|
You say that you want more rpm, I presume that you mean more usable rpm between your cruise speed and the rev limiter. Gear choice when balancing crusing against best performance/fun factor, is usally a compromise and boils down to an individuals preference. Do the math as Mr.P suggests, or use an on line calculator to see how the rpm will change with different axle ratios. Also, if the concern is simply bumping into the rev limiter, maybe move it up a few hundred rpm. I would think that you would be shifting around 6000 anyways, and a 600 hp motor should have the internals to safely rev past that. 
|
|
|
Re: better gears for more purpose use but power to.
[Re: JohnRR]
#1126918
12/04/11 08:22 PM
12/04/11 08:22 PM
|
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
|
Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
|
Quote:
Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.
That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.
|
|
|
Re: better gears for more purpose use but power to.
[Re: DaytonaTurbo]
#1126919
12/04/11 10:36 PM
12/04/11 10:36 PM
|
Joined: Jun 2008
Posts: 768
Maryville tn
67coronetman
OP
super stock
|
OP
super stock
Joined: Jun 2008
Posts: 768
Maryville tn
|
Yes it is busting the tires loose so i am going to do something cause i am just wasting my time as it is, Quote:
Quote:
Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.
That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.
Old car are me......
|
|
|
Re: better gears for more purpose use but power to.
[Re: 67coronetman]
#1126921
12/05/11 06:52 AM
12/05/11 06:52 AM
|
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
|
Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
|
Quote:
Yes it is busting the tires loose so i am going to do something cause i am just wasting my time as it is,
Quote:
Quote:
Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.
That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.
On the track or on the street? Any car with that kind of power is going to blow away tires on the street no matter what.
|
|
|
Re: better gears for more purpose use but power to.
[Re: DaytonaTurbo]
#1126922
12/05/11 12:01 PM
12/05/11 12:01 PM
|
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
|
Quote:
Quote:
Yes it is busting the tires loose so i am going to do something cause i am just wasting my time as it is,
Quote:
Quote:
Your bigger problem is a lack of TRACTION, you could switch to a 2.76 gear change the rev limiter to 8k rpm and if it's spinning you are still going to be on the rev limiter pretty quickly.
That's what I was thinking too. It's not the gear's fault that you're spinning and hitting the rev limiter. Either up the traction or ease up on the pedal. With a 600hp engine, 2.76 rear gears and crappy street tires you'll still be blowing them away and bouncing off the rev limiter.
On the track or on the street? Any car with that kind of power is going to blow away tires on the street no matter what.
 you need a wide/sticky tire to gain traction.
|
|
|
Re: better gears for more purpose use but power to.
[Re: 67coronetman]
#1126923
12/05/11 03:27 PM
12/05/11 03:27 PM
|
Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
|
master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
|
"Ok i have a 1966 plymouth Satellite with a 600 hp motor i changed over to a A-833 trans with a 8 3/4 rear with a 489 chunk & 391 gears yes its a posi when i am crusing in forth and hit third hard it hits the rev limiter fast i want more rpm would 3:55 be better or 3:23 any ideas.!"
Try the 3.55 gears. They are a good compromise for some freeway use and should get you up into the 140+ to 160+ mph range, depending on how tall your tires are.
Are you having traction problems too?
Tell us about your 600hp engine combination.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
|
|
|
Re: better gears for more purpose use but power to.
[Re: 67coronetman]
#1126926
12/06/11 11:16 AM
12/06/11 11:16 AM
|
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
|
I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
|
Quote:
Yea i know a Dana 60 way ahead all ready have one but i may get alot of slack on this but that 8 3/4 is more than strong enough.! i have a friend here that had a 900 hp stroker 440 with indy heads and ran a 8 3/4 for years never broke it once.
Quote:
B body ,600hp, standard transmission, 8.75 rear, traction... ..BANG  Before you get some sticky tires, you might consider trading that 8.75 for a __________________.
More info, what body, what did it weigh, pro gears, what did it 60 ft ???
|
|
|
|
|
