Rear Gear Question

njk53 · 09-24-2013, 03:01 PM

Quote:

Originally Posted by ss3011

Just curious what rpm peak torque and peak HP is at. Converter seems pretty tight.

I'll look at the dyno sheet and let you know.

impstocker · 09-25-2013, 10:33 AM

This is a great thread for me as it answers basically my same question. I am building a 1965 Impala with the 396/325 BBC combo for I/SA at 4100 lbs. I will be using the same motor from my 68 Impala I ran but that was a Stickshift car (Jerico) I will be running a Turbo 350 w the 2.75 first. I will be using the rear from the 68 which has 4:88's in it. I do have a set of 4:56 which I thought might be better with the Turbo 350, but i think I will stick with the 4:88's at first. I have heard the same thing going as high as 4:30's, but i feel with the weight of the car the 88's will be better.

I think my best 60' time was a 1.60 with the 68' , but I feel I never got the clutch set-up right (Mcleod Rev-Lok) I did MPH pretty good (114-117 MPH ) that was at 6600 RPM through the traps, so I am hoping with the automatic I can see the full potential of this combination, seeing that the index is 2 tenths quicker than when i last ran! (I ran 11.70's with the 68)

Any input this way would also be appreciated.
Will Lamprecht
Div 1, 65 imp big ole chevy

l

Dan Fahey · 09-25-2013, 10:52 AM

Quote:

Originally Posted by impstocker

This is a great thread for me as it answers basically my same question. I am building a 1965 Impala with the 396/325 BBC combo for I/SA at 4100 lbs. I will be using the same motor from my 68 Impala I ran but that was a Stickshift car (Jerico) I will be running a Turbo 350 w the 2.75 first. I will be using the rear from the 68 which has 4:88's in it. I do have a set of 4:56 which I thought might be better with the Turbo 350, but i think I will stick with the 4:88's at first. I have heard the same thing going as high as 4:30's, but i feel with the weight of the car the 88's will be better.

I think my best 60' time was a 1.60 with the 68' , but I feel I never got the clutch set-up right (Mcleod Rev-Lok) I did MPH pretty good (114-117 MPH ) that was at 6600 RPM through the traps, so I am hoping with the automatic I can see the full potential of this combination, seeing that the index is 2 tenths quicker than when i last ran! (I ran 11.70's with the 68)

Any input this way would also be appreciated.
Will Lamprecht
Div 1, 65 imp big ole chevy

l

Yeah this is a great thread.
My 1969 Impala still under re-construction has 5.13's.
Have a Budd Rowe built 350/255 in storage with an early cam.
The Dyno shows it is all done by 6000rpm.

Building it to run Stock. For now will run Pure Stock until a modern cam is installed.
Still have the 3800 TCI Converter and TurboAction 350. This will definitely need some upgrade.

Will's 396/325 would be a 427/335 for my car and may consider the larger engine.
Both have the same cam and the shift points should be lower.
Think it is a better combination than the 427/390.

Would need the T350 with a 2.75 gear for either car.
Get the feeling the 5.13's need to be 5.38's for the 350.
But the 5.13's maybe be too much for a 427.

Dan

5389stk · 09-25-2013, 10:38 PM

njk 4.88 or 5.13 converter is close; try stock gears in trans.More power always helps. test,test

njk53 · 09-26-2013, 01:40 PM

I agree with the testing but Milan Dragway is an hour and fifteen minutes away. Wish the old Detroit Dragway was still there that was a 1/2 hour drive.

Bob Bender · 09-26-2013, 05:55 PM

Just put the 5.86 in like mine. Lmao

Lew Silverman · 09-26-2013, 06:05 PM

X2 on the 5.86! Things happen much faster!

Wade_Owens · 09-30-2013, 11:49 AM

Quote:

Originally Posted by Bob Bender

Just put the 5.86 in like mine. Lmao

Bobby, I figured you for a 6.50 rear gear!

-

Wade

superstockdave · 10-01-2013, 09:03 PM

Nelson, I started reading this and realized this my old car. I would like to save you some money, don't try 513 gear, it lost ET. I assume that you are still running the motors that I had built from Parson/Meyers, I would start with valve springs and more valve spring pressure. Valves spring pressure is the key to horsepower for stockers and as you know I spent a lot of money on that car learning. Hope this helps

09-25-2013, 10:33 AM	#2
impstocker Member Join Date: Dec 2008 Location: Wingdale, NY Posts: 302 Likes: 27 Liked 53 Times in 16 Posts	Re: Rear Gear Question This is a great thread for me as it answers basically my same question. I am building a 1965 Impala with the 396/325 BBC combo for I/SA at 4100 lbs. I will be using the same motor from my 68 Impala I ran but that was a Stickshift car (Jerico) I will be running a Turbo 350 w the 2.75 first. I will be using the rear from the 68 which has 4:88's in it. I do have a set of 4:56 which I thought might be better with the Turbo 350, but i think I will stick with the 4:88's at first. I have heard the same thing going as high as 4:30's, but i feel with the weight of the car the 88's will be better. I think my best 60' time was a 1.60 with the 68' , but I feel I never got the clutch set-up right (Mcleod Rev-Lok) I did MPH pretty good (114-117 MPH ) that was at 6600 RPM through the traps, so I am hoping with the automatic I can see the full potential of this combination, seeing that the index is 2 tenths quicker than when i last ran! (I ran 11.70's with the 68) Any input this way would also be appreciated. Will Lamprecht Div 1, 65 imp big ole chevy l

09-25-2013, 10:38 PM	#4
5389stk Junior Member Join Date: Aug 2013 Posts: 30 Likes: 0 Liked 75 Times in 7 Posts	Re: Rear Gear Question njk 4.88 or 5.13 converter is close; try stock gears in trans.More power always helps. test,test

09-26-2013, 01:40 PM	#5
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: Rear Gear Question I agree with the testing but Milan Dragway is an hour and fifteen minutes away. Wish the old Detroit Dragway was still there that was a 1/2 hour drive. __________________ Nelson Kowal Stock 345

09-26-2013, 05:55 PM	#6
Bob Bender VIP Member Join Date: Jan 2009 Location: Maryland Posts: 1,737 Likes: 1,601 Liked 460 Times in 91 Posts	Re: Rear Gear Question Just put the 5.86 in like mine. Lmao __________________ Bob Bender 144 O/SA 2010-2012 National Record Holder

09-26-2013, 06:05 PM	#7
Lew Silverman VIP Member Join Date: Mar 2010 Location: Newport News, VA Posts: 1,435 Likes: 371 Liked 129 Times in 59 Posts	Re: Rear Gear Question X2 on the 5.86! Things happen much faster! __________________ Lew Silverman #2070 "The Wagon Master" N/SA

10-01-2013, 09:03 PM	#9
superstockdave Junior Member Join Date: Jun 2013 Location: Morningview Ky Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Rear Gear Question Nelson, I started reading this and realized this my old car. I would like to save you some money, don't try 513 gear, it lost ET. I assume that you are still running the motors that I had built from Parson/Meyers, I would start with valve springs and more valve spring pressure. Valves spring pressure is the key to horsepower for stockers and as you know I spent a lot of money on that car learning. Hope this helps