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04-07-2011, 01:58 AM
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#1 |
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Registered User
 
Join Date: Oct 2010
Location: Buckeye Arizona
Posts: 470
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Guys with 3.73's
What MPH do you run on the highway at what RPM?
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04-07-2011, 02:05 AM
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#2 |
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Registered User
Join Date: Jun 2009
Location: Dub VC Utah
Posts: 364
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Re: Guys with 3.73's
I have 3.73's with 35's and I turn about 70mph at 2200rpm.
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'70 K10-- 4" lift on 35"s-- For Sale http://www.ksl.com/index.php?sid=733...iew&ad=4578305 |
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04-07-2011, 07:09 AM
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#3 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: Guys with 3.73's
to much!! I have a BB caddy which hates RPM at 70ish I'm turning about 3000 on a stock tire
you can google your set up theres a few online programs try this http://www.ringpinion.com/Calc_RPM.aspx |
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04-07-2011, 07:11 AM
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#4 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: Guys with 3.73's
3106 auto
3025 manual 2118 overdrive 2420 with a 5 speed on a 29" tire Last edited by Hottrucks; 04-07-2011 at 07:12 AM. |
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04-07-2011, 07:42 AM
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#5 |
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Registered User
Join Date: Jun 2010
Location: Jefferson, MD
Posts: 2,397
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Re: Guys with 3.73's
about 3200rpm at 70 on a 28" tire
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'68 Dodge Dart 270, 225, 904, 2.76--"Lucy" 1996 Gmc 1500 Z71, 350, 4l60e, 3.73s 1995 Jeep Wrangler Rio Grande 2.5, AX5, 4.10s 1989 Toyota Pickup 22re, auto, 3.73 |
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04-07-2011, 07:55 AM
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#6 |
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Senior Member
Join Date: Oct 2009
Location: Shelburn Indiana
Posts: 3,977
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Re: Guys with 3.73's
283 cid 3 speed manual (still 1 to 1 high gear) 3.73 rear end, 283s do not mind rpm's
With 235/70r15 tires I was running 3000 rpm at 60mph (Ran great but Loved fuel) with 255/70r15 tires I was running 2800 rpm at 60mph (Ran great but still Loved fuel) now with 3.08 gears and 255/70r15 tires I am running 2200 rpm at 60 (seems like less power but hope it likes fuel less) Just put gas in it yesterday at $3.99 a gallon
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Note: All parts I have for sale are also for sale locally. I currently own: 1940 Chevy Fire truck (project), 1946 Chevy truck (project), 1946 Chevy 1 Ton pick up, 1953 Chevy school bus (storage area), 1968 Chevy C10 (I have drove for 26 years), 1994 Chevy C2500 (daily driver), 2005 GMC crew cab K2500 (parts hauler) and more trucks for parts. |
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04-07-2011, 07:59 AM
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#7 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: Guys with 3.73's
yea I plan on the 3:08's it will make for a Happy Caddy @ 2200 power isnt an issue...lol
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1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate..  Mikes Sandwich Fair Run OCT 8th 2011
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04-07-2011, 10:05 AM
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#8 |
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Registered User
Join Date: Dec 2008
Location: Ashland, KY
Posts: 700
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Re: Guys with 3.73's
IDK but it screams lol! Dont bother me tho I swapped from 3.08s to 3.73 posi and couldnt be happier. my truck has a TH400 in it right now but i believe that im gunna swap to a 700R4 after i have my fun abusing the TH400.
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68 C10 LWB 2/4 drop 406/th400/3.73posi 04 Silverado SS LQ9 6.0/4L65e/4.11posi AWD |
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04-07-2011, 10:10 AM
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#9 |
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Registered User
Join Date: Oct 2010
Location: Buckeye Arizona
Posts: 470
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Re: Guys with 3.73's
Thanks guys!
I have an old Small Journal 327 so I'm not tooo worried about RPM Right now I have 4.56's but lookin to put an overdrive setup on it, Gear Vendor's site says it'd put my final at about 3.56, and after the info you guys gave me, hopefully I can run 75 around 2500rpm or so. |
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04-07-2011, 11:15 AM
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#10 |
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Registered User
Join Date: Feb 2008
Location: Lake Stevens, WA
Posts: 623
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Re: Guys with 3.73's
I run at about 2000rpm at 65 with my 3.73 rear and 700r4. Average mpg has been about 16-17.
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04-07-2011, 01:44 PM
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#11 |
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Redefining LowBudget
Join Date: Mar 2009
Location: lebanon Cow Hampshire
Posts: 4,538
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Re: Guys with 3.73's
I took out 308's for the 373's when I had my 327...it was a pig..the 373's work well with that motor??(not so much the BB)..unless you do alot of highway travel I would think about spending the ching......I think you would like the 200 or 700 trans with OD more and it will set you back less...but thats just MAO??
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1970 C10 CST fleetside 472 ....big dreams little cash... SunShine Syndicate.. Mikes Sandwich Fair Run OCT 8th 2011
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04-07-2011, 02:31 PM
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#12 |
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Registered User
Join Date: Jan 2011
Location: Lynn Haven Florida
Posts: 1,019
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Re: Guys with 3.73's
327's are rpm monsters don't worry about that
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04-07-2011, 04:48 PM
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#13 |
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Gearhead
Join Date: Jan 2008
Location: Colorado
Posts: 1,193
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Re: Guys with 3.73's
My 72' runs about 2,000 RPM @ 65MPH w/the 700R4 and 29" tires (255/55/18) I think I have 3.73's
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2002 Saturn SL2, My D/D 2019 Ford Fusion SE, Ecoboost - Wife's D/D 1993 Camaro Z28, A4, CAI, Cat-Back Exhaust Project C10 (my 72' C10 w/96' LT1, 700R4, bagged F&R, 18's (for now), Short/Fleet) -- SOLD! Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=313644 |
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04-07-2011, 05:51 PM
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#14 |
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Registered User
Join Date: Jun 2009
Location: Dub VC Utah
Posts: 364
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Re: Guys with 3.73's
Forgot to add I have a TH350.
Posted via Mobile Device
__________________
'70 K10-- 4" lift on 35"s-- For Sale http://www.ksl.com/index.php?sid=733...iew&ad=4578305 |
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04-07-2011, 10:58 PM
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#15 |
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Registered User
Join Date: Oct 2010
Location: Buckeye Arizona
Posts: 470
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Re: Guys with 3.73's
well I know my old 327 saw somewhere around 6,500. Bein that my dad used to bracket race the truck and went through the speed traps at about 95mph ET'in at like 15.70's lmao.
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04-10-2011, 03:11 AM
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#16 |
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Cops, ha, catch me if you can!
Join Date: Jun 2009
Location: Santa Barbara, CA.
Posts: 271
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Re: Guys with 3.73's
@60MPH I am at about 2850RPM w/275/60/15 tires.
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72 C-10 Stepper 350/TH350 3.73 in the back Edelbrock intake and Carb Hooker Comp Headers 275/60R15 on Rallies  
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04-10-2011, 09:44 AM
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#17 |
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Registered User
Join Date: Dec 2009
Location: Atlanta, Ga.
Posts: 1,050
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Re: Guys with 3.73's
700R4 trans, 3:73 rear gear , 29" tires = 2100 RPMs @ 70 MPH
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04-10-2011, 11:07 AM
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#18 | |
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Senior Member
Join Date: May 2002
Location: Hammond, WI
Posts: 1,796
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Re: Guys with 3.73's
700r4, 3.73 gears, 31" tires, runnin' 2000 RPMs @ 70 MPH
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Mike 2001 Dakota R/T - Silver CC - 1 of 1671 •360 w/46RE •392 limited slip 1972 Chevy Suburban - Turquoise/Black 1969 Chevy C/10 - Blue LWB •350 w/ 700R4 •3.73 posi •PS PB A/C - SOLD  Using your turn signal is not "giving information to the enemy" 67-72 FAQ Quote:
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