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What gear???????

Started by oldsnofear, March 01, 2011, 03:36:50 AM

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oldsnofear

March 01, 2011, 03:36:50 AM
Hi I have a 69 charger with a 383 727 trans and a 3.55 rear end. Im just lookin for a couple of opinions. I drove my car to milan dragway last year and at 70 mph i was cranking out about 3300 rpms for about 2 1/2 hours. Now im thinking about taking it to florida from michigan. I have 235 60 15 tires on it. It ran a 14.30 1/4 mile  no burnout and spinning through 1st gear..  My question is how big of a dog would this thing be if i put a 2.94 ring/pinion. If i did the math right it would run at 2750 at 70 mph??   ps engine has a eddy perfomer cam/intake/carb/ 9.5 comp :shruggy:

greenpigs

#1
March 01, 2011, 04:48:05 AM
Try this:http://vexer.com/automotive-tools/speed-rpm-calculator

I would swap to a taller rear tire.
1969 Charger RT


Living Chevy free

BSB67

#2
March 01, 2011, 06:47:36 AM
correct...3300 x 2.94/3.55 = 2733

Are you moving there?  ie. one way trip?  I would probably just drive it.  Give yourself some additional time, and slow down a bit.  Or rent a car, or a car trailer.

500" NA, Eddy head, pump gas, exhaust manifold with 2 1/2 exhaust with tailpipes
4150 lbs with driver, 3.23 gear, stock converter
11.68 @ 120.2 mph

doctor4766

#3
March 01, 2011, 08:38:50 AM
I'd go with a 3.23 rear end.
Gives enough poke without revving too high at highway speed.
My setup of 3.23/727/383 sits at 2400 at 62mph (100kph)
Gotta love a '69

68X426

#4
March 01, 2011, 11:34:39 AM
Quote from: greenpigs on March 01, 2011, 04:48:05 AM

I would swap to a taller rear tire.

:iagree:


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mikesbbody

#5
March 03, 2011, 07:47:52 PM
Changing Tires much easier than changing the rear end  :Twocents:

oldsnofear

#6
March 04, 2011, 03:22:15 AM
Doctor 4766, Do you have a 28 in tire with your 3.23?

doctor4766

#7
March 04, 2011, 03:47:18 AM
I have 295/60/15's on the rear.
Not sure what that equates to in inches sorry
Gotta love a '69

greenpigs

#8
March 04, 2011, 04:02:53 AM
28.9
1969 Charger RT


Living Chevy free

doctor4766

#9
March 04, 2011, 04:07:51 AM
Cheers mate
Gotta love a '69

oldsnofear

#10
March 05, 2011, 03:05:20 AM
Thanks for the help :cheers:

Mrs.Caveman

#11
March 05, 2011, 05:00:50 AM
doctor4766-what size your wheels are?15x8 or 10?thanks,Veronika

mikesbbody

#12
March 05, 2011, 05:28:17 AM
Quote from: doctor4766 on March 04, 2011, 03:47:18 AM
I have 295/60/15's on the rear.
Not sure what that equates to in inches sorry

Are you sure they are not 50's? if they are 60's then they are probably 1. not BFG's or 2. 275/60/15.
Veronika, if they are 295's 15x10's are the usual size (they would bulge out the sides a bit much on a 15x8)

doctor4766

#13
March 05, 2011, 06:37:59 AM
The rear rims are 8.5" and they're definately 295/60/15s
Fronts are only 7" wide and I have 245/60/15s on those.
They're Hercules tyres, US made and priced very well.
Gotta love a '69

mikesbbody

#14
March 05, 2011, 04:10:37 PM
Quote from: doctor4766 on March 05, 2011, 06:37:59 AM
The rear rims are 8.5" and they're definately 295/60/15s
Fronts are only 7" wide and I have 245/60/15s on those.
They're Hercules tyres, US made and priced very well.

Cool and thanks! I think BFG made a 285? 60/15 or a 295/60/15 but was discontinued I have not heard of Hercules before
I'll be checking them out on Google  :cheers:
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