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3.91 or 4.10? Help Me Decide Please #181180
01/02/09 12:46 AM
01/02/09 12:46 AM
Joined: Aug 2007
Posts: 1,271
Vista, California
6
67Satty Offline OP
pro stock
67Satty  Offline OP
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Joined: Aug 2007
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Vista, California
'll be ordering up a center section in the next month or so for my '67 Satellite Street/Strip car.

The particulars of the motor are .040 over 440, TRW 2355's at zero deck, 9.75:1 compression, 238 @ .050, .534 lift hydraulic cam, unported 452 heads, Hooker 1 and 7/8" headers, Performer RPM, Holley 850 DP, FBO Ignition.

The trans has a 9.5" Dynamic Street/Strip converter, 4200 flash. I'll run 9X28 slicks at the strip. I'll be driving it to the strip, maybe 50 miles away. Other than that, I'll take it to cruise nights on weekends.

I'm not worried about RPMs on the highway, more worried about best ET at the strip. It will be raced on both 1/8 mile and 1/4 mile.

Thanks for any input, I'm trying to get back into this on a budget after a 20+ year hiatus.

Re: 3.91 or 4.10? Help Me Decide Please [Re: 67Satty] #181181
01/02/09 12:47 AM
01/02/09 12:47 AM
Joined: Oct 2004
Posts: 3,097
back in Georgia
dthemi Offline
master
dthemi  Offline
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Joined: Oct 2004
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back in Georgia
4.10

Re: 3.91 or 4.10? Help Me Decide Please [Re: dthemi] #181182
01/02/09 12:49 AM
01/02/09 12:49 AM
Joined: Mar 2005
Posts: 3,131
Central NC
gch Offline
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Central NC

Not that you asked but ported heads would go from to .

Re: 3.91 or 4.10? Help Me Decide Please [Re: dthemi] #181183
01/02/09 12:50 AM
01/02/09 12:50 AM
Joined: Aug 2006
Posts: 614
Michigan
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Get-X Offline
mopar
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Michigan
Quote:

4.10






'65 Belvedere
'68 GTX
'57 Dodge pickup
Re: 3.91 or 4.10? Help Me Decide Please [Re: Get-X] #181184
01/02/09 12:55 AM
01/02/09 12:55 AM
Joined: Oct 2004
Posts: 3,097
back in Georgia
dthemi Offline
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Quote:

Quote:

4.10









4.30 would work too

Re: 3.91 or 4.10? Help Me Decide Please [Re: Get-X] #181185
01/02/09 12:55 AM
01/02/09 12:55 AM
Joined: Nov 2006
Posts: 396
California, USA
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Phil Saran Offline
enthusiast
Phil Saran  Offline
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California, USA
For the convertor you have and the rest of your combo go with the 4:10.

If you were to go with more convertor I would
say maybe a 4:30, still streetable, but not for
a 50 mile drive to the strip.

Just my


Phil Saran Parker, Colorado
Re: 3.91 or 4.10? Help Me Decide Please [Re: Phil Saran] #181186
01/02/09 01:26 AM
01/02/09 01:26 AM
Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
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BDS871Cuda Offline
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land of 10,000______'s
Sounds like a fun ride! I vote 4.10's


Snap your neck, mega G-force launch, is all I want!
Re: 3.91 or 4.10? Help Me Decide Please [Re: BDS871Cuda] #181187
01/02/09 02:01 AM
01/02/09 02:01 AM
Joined: Jun 2004
Posts: 3,319
Chicago Burbs
sthemi Offline
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sthemi  Offline
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Chicago Burbs
4:10s , you will like em..

Re: 3.91 or 4.10? Help Me Decide Please [Re: 67Satty] #181188
01/02/09 02:55 AM
01/02/09 02:55 AM

A
Anonymous
Unregistered
Anonymous
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A



I bet i'm the only one that will say 3.90 but i think they will give you better top end, plus wit hall that tq that 440 will have with that stall the 3.90 may net better traction.

The only way i would go 4.10 is if i planned on some heads that flowed over 300 cfm. If you plan to stay with the stock heads for a while the 3.90 is what i would run.

Re: 3.91 or 4.10? Help Me Decide Please #181189
01/02/09 09:26 AM
01/02/09 09:26 AM
Joined: Nov 2004
Posts: 7,274
s.w.fl
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bonefish Offline
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s.w.fl
410,i changed my street car from 430,s to 410,s and love it.the 430,s had alot more umph but were a little to much for my liking on the street.

Re: 3.91 or 4.10? Help Me Decide Please [Re: 67Satty] #181190
01/02/09 09:55 AM
01/02/09 09:55 AM
Joined: Jan 2003
Posts: 16,917
NC
440Jim Offline
I Live Here
440Jim  Offline
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NC
There will not be much change in performance at the track. If you hook it, the 4.10 may give you about 0.02 better sixty foot.

With your 28" tires and hydraulic cam, I would keep the finish line rpm to 6000. Use the on line calculators and your target mph. I really like 3.91 gears with 28" tires on street cars, but 4.10 might be slightly better on the track, but you will live with a couple hundred extra rpm driving on the street.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: 3.91 or 4.10? Help Me Decide Please [Re: 440Jim] #181191
01/02/09 12:03 PM
01/02/09 12:03 PM
Joined: Jan 2007
Posts: 401
Ohio, USA
Dr-Dave2 Offline
mopar
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Ohio, USA
http://www.wallaceracing.com/Calculators.htm

Looks like you have a real good combination going so far, that thing should have a real nice flat torque curve..well done!

do the math 3.91s will only be 0.02 to 0.03 slower & less gear will make for a more consistent bracket car. Consistancy wins races, not low E.T. 3.91s or less (gasp!) will make for a more enjoyable ride back home after a good day of racing... and... just maybe... to the bank to cash the winners check!

Last edited by Dr-Dave2; 01/02/09 05:24 PM.
Re: 3.91 or 4.10? Help Me Decide Please [Re: Dr-Dave2] #181192
01/02/09 12:20 PM
01/02/09 12:20 PM
Joined: Aug 2006
Posts: 614
Michigan
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Get-X Offline
mopar
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Michigan
Quote:

http://www.wallaceracing.com/Calculators.htm

do the math 3.91s will only be .002 to .003 slower & less gear will make for a more consistent bracket car. Consistancy wins races, not low E.T. 3.91s or less (gasp!) will make for a more enjoyable ride back home after a good day of racing... and... just maybe... to the bank to cash the winners check!




He asked what gear makes the best ET. And using your line of thought, he should remove the stroker(after all, it would be more consistant with a 318) to prevent possible traction issues. Using 4.10s or even 4.30s (gasp!)will increase performance and make for a funner car to drive.


'65 Belvedere
'68 GTX
'57 Dodge pickup
Re: 3.91 or 4.10? Help Me Decide Please [Re: 67Satty] #181193
01/02/09 12:23 PM
01/02/09 12:23 PM
Joined: Jan 2003
Posts: 13,319
Marion, South Carolina [><]
an8sec70cuda Offline
I Live Here
an8sec70cuda  Offline
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Marion, South Carolina [><]
Go with 4.10s. CHIP


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
Re: 3.91 or 4.10? Help Me Decide Please [Re: an8sec70cuda] #181194
01/02/09 12:36 PM
01/02/09 12:36 PM
Joined: Feb 2006
Posts: 2,379
MD
Kevins493 Offline
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MD
We had almost the same combo in the 64 Plymouth. We ran 3.91's, but felt the 60ft and ET would be better with 4.10's, but with a 28" drag radial, the rpm was over 6000 at the finish line with the 3.91's and the same converter as you (drag radials don't grow so the finish line rpm is significantly higher) With stock heads (template ported), it ran out of steam over 5500. Ran a best of 11.74 @ 114.

Last edited by Kevins440; 01/02/09 02:19 PM.
Re: 3.91 or 4.10? Help Me Decide Please [Re: 67Satty] #181195
01/02/09 12:47 PM
01/02/09 12:47 PM
Joined: Sep 2004
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Chicken coop
dustergirl340 Offline
Chicken Little
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3.91's for my Duster is my personal limit for a street car. Mine does get driven on the freeway on occasion though. It gets bracket-raced on weekends during the season, and 3.91's made for the best consistency (doesn't sound like you care about that though if you are going for best ET).

Re: 3.91 or 4.10? Help Me Decide Please [Re: 440Jim] #181196
01/02/09 05:21 PM
01/02/09 05:21 PM
Joined: Dec 2007
Posts: 486
IL
knyech1 Offline
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Quote:

There will not be much change in performance at the track. If you hook it, the 4.10 may give you about 0.02 better sixty foot.

With your 28" tires and hydraulic cam, I would keep the finish line rpm to 6000. Use the on line calculators and your target mph. I really like 3.91 gears with 28" tires on street cars, but 4.10 might be slightly better on the track, but you will live with a couple hundred extra rpm driving on the street.






knyech1- '71 Sassy Grass Demon 340/904. Pump gas, 1.61 60ft, 7.439 1/8 @ 95mph, 11.824 1/4 @ 111mph "Not too bad for a pump gas 340, full of used parts and hillbilly ported stock heads." - V.B. '03 2500 5.9L HO 6-spd on 35's. 395hp/755ft-lb at tires.
Re: 3.91 or 4.10? Help Me Decide Please [Re: knyech1] #181197
01/02/09 09:43 PM
01/02/09 09:43 PM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
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Balt. Md
Thats very close to my 440 combo in my 63. I run 906 heads that I did some port work on myself. The bottom end is stock but I used KB quench dome pistons so I could get quench with the 906 heads and run on 92 pump at the 10.0 comp I built into it. But I run the solid MP .557 cam with the Holley Street Dominator intake and a 850 DP. I would like to get bigger headers as I use Hedman 1-3/4 tubes because they came with the car brand new in the box. I also use the same 9.5 Dynamic convertor that drives great on the street and flashes about 4200. I use 4.30's with 29 x 11.5 Hoosier QTP tires and I drive it on the highway all the time turning 3200 rpm at 60 mph. I shift by feel and it is right about 6200 when I shift and then I trap about 6300 and it still feels like it's still pulling. It has run 11.50's @ almost 117 mph at 3700 lbs and I drive it the 45 miles to my local track. I like the 4.10's with a 28" tire on a solid cam but you may run out of steam with the hydraulic cam. I would go for the 4.10's as you can always go to a 29" tire if it runs out of steam and needs it. Good luck , Ron

Last edited by 383man; 01/02/09 09:46 PM.
Re: 3.91 or 4.10? Help Me Decide Please [Re: 383man] #181198
01/03/09 05:05 PM
01/03/09 05:05 PM
Joined: Jan 2003
Posts: 16,917
NC
440Jim Offline
I Live Here
440Jim  Offline
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NC
Quote:

I use 4.30's with 29 x 11.5 Hoosier QTP tires and I drive it on the highway all the time turning 3200 rpm at 60 mph. I shift by feel and it is right about 6200 when I shift and then I trap about 6300


Remember, 67Satty's hydraulic cam and unported 452 heads won't be making much power over 6000 rpm. Not like a solid lifter cam.

Last edited by 440Jim; 01/03/09 05:07 PM.
Re: 3.91 or 4.10? Help Me Decide Please [Re: 440Jim] #181199
01/03/09 06:14 PM
01/03/09 06:14 PM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
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383man  Offline
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Balt. Md
Quote:

Quote:

I use 4.30's with 29 x 11.5 Hoosier QTP tires and I drive it on the highway all the time turning 3200 rpm at 60 mph. I shift by feel and it is right about 6200 when I shift and then I trap about 6300


Remember, 67Satty's hydraulic cam and unported 452 heads won't be making much power over 6000 rpm. Not like a solid lifter cam.




Good point Jim. Maybe he should go with the 3.91's. Ron

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