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Re: 440 engine help [Re: exile5700] #2674287
07/05/19 01:18 AM
07/05/19 01:18 AM
Joined: Aug 2003
Posts: 33,266
Bend,OR USA
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Cab_Burge Online content
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Joined: Aug 2003
Posts: 33,266
Bend,OR USA
The easy way to find out exactly which ratio gears you have is to jack the car up on jack stands and mark the tire or wheel to the brake backing plates and mark the driveshaft and either the transmission tail shaft housing or the rear end center section so you can count the drive shaft revolutions for one complete tire rotation scope
If the driveshaft goes around almost 3 complete revolutions it has 2.92 ratio for one complete tire rotation, if it goes around 3 1/4 it has 3.23, if 3 1/2 it has 3.55, if 3 3/4 it has 3.73, if almost 4 revoltuions it has 3.91 and if it rotates 4 1/10 it has 4.10 and so on work
IHTHs

Last edited by Cab_Burge; 07/05/19 01:19 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 440 engine help [Re: Cab_Burge] #2674610
07/05/19 09:07 PM
07/05/19 09:07 PM
Joined: Apr 2012
Posts: 54
Ontario, CA
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Ramtough Offline
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Ramtough  Offline
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Joined: Apr 2012
Posts: 54
Ontario, CA
MSD ignitions are nice but if most of your driving is 5500 rpm or less factory dist reworked, a good box and go. As for carb, for mostly street use a 650 AVS Edelbrock will work perfect, have customer 68 RR 440 dynoed at 580 hp, 4sp, 3:55 gears, pulls real nice to 6000 and is good on fuel.

Re: 440 engine help [Re: Ramtough] #2674768
07/06/19 10:56 AM
07/06/19 10:56 AM
Joined: Jan 2003
Posts: 24,301
Brookeville, Md
Mr.Yuck Offline
Too Many Posts
Mr.Yuck  Offline
Too Many Posts

Joined: Jan 2003
Posts: 24,301
Brookeville, Md
Originally Posted by Ramtough
MSD ignitions are nice but if most of your driving is 5500 rpm or less factory dist reworked, a good box and go. As for carb, for mostly street use a 650 AVS Edelbrock will work perfect, have customer 68 RR 440 dynoed at 580 hp, 4sp, 3:55 gears, pulls real nice to 6000 and is good on fuel.


580 w/ a 650 eddy? BULLLLLLLLLL SHEEEEEET maybe 2 of them.

Re: 440 engine help [Re: Mr.Yuck] #2675344
07/07/19 09:10 PM
07/07/19 09:10 PM
Joined: May 2015
Posts: 1,133
Lost in Time
Iowan Offline
super stock
Iowan  Offline
super stock

Joined: May 2015
Posts: 1,133
Lost in Time
The thing that concerns me is that I've seen in the last five years or so ALL the master rebuild kits come with the low compression pistons no matter what year kit you order. So you have to order pistons from a manufacturer that has different options for CR.


Have a great day
Iowan

"obsolete is neat"

Re: 440 engine help [Re: Iowan] #2675358
07/07/19 09:34 PM
07/07/19 09:34 PM
Joined: Jan 2003
Posts: 1,269
Houston,Tx.
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Lee446 Offline
pro stock
Lee446  Offline
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Joined: Jan 2003
Posts: 1,269
Houston,Tx.
Bingo!

Re: 440 engine help [Re: Cab_Burge] #2676382
07/10/19 07:57 PM
07/10/19 07:57 PM
Joined: Jun 2019
Posts: 14
Maine
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exile5700 Offline OP
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exile5700  Offline OP
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Joined: Jun 2019
Posts: 14
Maine
I checked my rear end. It is limited slip, 3.23, has 741 on the case as well as an x. Will this be ok with the 440?

Re: 440 engine help [Re: exile5700] #2676393
07/10/19 08:34 PM
07/10/19 08:34 PM
Joined: Aug 2003
Posts: 33,266
Bend,OR USA
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Cab_Burge Online content
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Joined: Aug 2003
Posts: 33,266
Bend,OR USA
Originally Posted by exile5700
I checked my rear end. It is limited slip, 3.23, has 741 on the case as well as an x. Will this be ok with the 440?

Heck yes, I put hundreds of laps on a stock early production 741 Posi unit(clutch type) with 3.91 gears in my 1969 Dart GTS 4 speed car with a 440 motor and 727 that ran low 11.s(11.17 best at 122+ MPH with slicks for hundreds of runs and some street duty.
I sold that car in 2002 to a friend after I put a 383 back in it with a 4 speed, he broke the rear U joint the 2nd day he had it doing burn outs and never hurt the rear with a set of BFG 275x60x15 drag radials on the car shruggy
I bought the car back in 2008 and have driven it for several hundreds mile since then with no issues at all up
You'll break a "489" case third member before breaking a "741" case with the same ratio and type of posi with the same driver and same driving conditions shruggy twocents work


Last edited by Cab_Burge; 07/10/19 08:35 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 440 engine help [Re: Cab_Burge] #2676405
07/10/19 09:00 PM
07/10/19 09:00 PM
Joined: Jun 2019
Posts: 14
Maine
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exile5700 Offline OP
member
exile5700  Offline OP
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Joined: Jun 2019
Posts: 14
Maine
Awesome! Thank you for your reply!

Re: 440 engine help [Re: Ramtough] #2676794
07/12/19 12:20 PM
07/12/19 12:20 PM
Joined: May 2015
Posts: 1,133
Lost in Time
Iowan Offline
super stock
Iowan  Offline
super stock

Joined: May 2015
Posts: 1,133
Lost in Time
Originally Posted by Ramtough
MSD ignitions are nice but if most of your driving is 5500 rpm or less factory dist reworked, a good box and go. As for carb, for mostly street use a 650 AVS Edelbrock will work perfect, have customer 68 RR 440 dynoed at 580 hp, 4sp, 3:55 gears, pulls real nice to 6000 and is good on fuel.


At one time I used a mopar electronic distributor on my RB motors and ran it to 7200 without fail, I did use a MSD box though.

Last edited by Iowan; 07/12/19 12:22 PM.

Have a great day
Iowan

"obsolete is neat"

Re: 440 engine help [Re: exile5700] #2676930
07/12/19 09:46 PM
07/12/19 09:46 PM
Joined: Feb 2005
Posts: 3,893
Prospect, PA
BSB67 Offline
master
BSB67  Offline
master

Joined: Feb 2005
Posts: 3,893
Prospect, PA
I ran a stock ish 440 (915 heads, no porting), MP 272 - 0.455" lift cam with manifolds and a factory intake. Best running carb was an 800 Holley DP.

Then we put that same carb/intake on a friend's stock ish 440 GTX, and it picked a a couple tenths and mph too over a 3310 Holley vac. carb.

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