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03-01-2009, 04:21 PM
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#1 |
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Registered User
Join Date: Jan 2007
Location: shoreline, wa
Posts: 1,565
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2500 rpm's at 65 mph??
2500 rpm's at 65 mph, does that sound right i took my 68 for its first drive on the interstate and thats what i got, everything eles was great and the truck drove great.
i have a 327 with a saginaw 4 speed, and a 4.11 rear end. what is a good set of gears to get the rpms down on the highway.
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68 swb fleet bagged on 20's 327 with 4 speed http://67-72chevytrucks.com/vboard/s...d.php?t=223308 2014 Chevy 2500hd duramax CCLB Last edited by cstm68; 03-01-2009 at 04:24 PM. |
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03-01-2009, 04:32 PM
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#2 |
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Registered User
Join Date: Oct 2000
Location: St. Johns, Arizona
Posts: 2,660
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Re: 2500 rpm's at 65 mph??
Sounds about right, but you didn't specify a tire height.
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my 2¢ - t.i.o.l.i. Bowen 1968 K20 fleet 1969 K10 swb fleet 1972 K10 Suburban 1972 C10 lwb step 1992 K1500 'burb 1995 K2500 'burb 1997 C1500 'burb 1999 K1500 2000 K1500 'burb Why do I own so many Suburbans? |
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03-01-2009, 04:33 PM
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#3 |
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Active Member
Join Date: Oct 2006
Location: Ohio
Posts: 1,643
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Re: 2500 rpm's at 65 mph??
Mine runs 3300 @ 65 with a 31" tall tire and 4.11 gears
I check mine with my GPS just to be sure I would love to have your 2500 
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1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles  18.5" x 31" Hoosier Pro Street Radials  ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree
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03-01-2009, 04:34 PM
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#4 |
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Registered User
Join Date: Feb 2005
Location: Carl Junction, Missouri
Posts: 2,061
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Re: 2500 rpm's at 65 mph??
that's what my civic does, 2500 rpm, but the tach in my truck was inaccurate, so i ripped it out
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03-01-2009, 04:38 PM
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#5 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: 2500 rpm's at 65 mph??
2500 @ 60 MPH is more like a 3.07 gear.
Either your tach, your speedo, or what you think is in the diff.... one of those 3 is wrong. |
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03-01-2009, 04:40 PM
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#6 |
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Gone to greener pastures
 Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: 2500 rpm's at 65 mph??
Sounds just a tad low to me.
Both my trucks have 4.11 gears & they both run right around 3200 at 65. My Chevy has about 27" tires, & the speedometer has been corrected for tire size; & the GMC has about 31" tires. I would have gotten better measurements, but it's raining.
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
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03-01-2009, 05:25 PM
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#7 |
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Registered User
Join Date: Sep 2007
Location: creedmoor n.c.
Posts: 188
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Re: 2500 rpm's at 65 mph??
 mine does 3,100 rpm @ 65 with 4.10 & 28in. tires.
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