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#1 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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speedo calculator???
Can some one direct me to a site....or calculate this for me.
31 inch tall tires (as sitting with the weight on them) 4.10/4.11 gears. (can never rememver which it is....C/30 HO72 rear) Auto tranny w/o lock up nor overdrive. What'll my 65 MPH RPM's be at? Can anyone tell me where to get non chevy Th350 gears? I was rather shocked to see they were not the same as chevy. That sucker is readin 60 - 70 when I am only goin 40 - 50, and it is racking up some miles just putting around the lot at work. |
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#2 |
Registered User
Join Date: Nov 2002
Location: Kelowna B.C. Canada
Posts: 1,086
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You might call a local shop with a dyno, I know my race bike mechanic in Calgary has one and dyno results were used as evidence in court as the rider (GSXR bike) disputed the police's radar gun. Just a thought, Doug
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#3 |
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Join Date: Nov 2001
Location: benton, ky
Posts: 288
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Right at 2900 rpms http://www.700r4.com/sitemap.shtml
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1971 LWB Chevy C-10 350/350 3:42 eaton ![]() |
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#4 | |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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Quote:
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#5 | |
Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Quote:
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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#6 |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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![]() "GQ"S MOTOR IS A BUILT 1970 LT1 CAMARO BLOCK W/ FORGED EVERYTHING, 3 DEGREE VALVE JOB, HEADS HOGGED OUT, ETC... ACCORDING TO THE PO, CHART, TIRES & MY GEARS I COULD GO OVER 200 MPH EASY WITHOUT EVEN PUSHING MY MOTOR. ![]() OF COURSE, DRAG ON A BLAZER BODY CHANGES ALL OF THAT ![]()
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#7 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Sweet...that's right about what I was expecting.
I guess that isn't too bad. Thanks for the link too! |
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#8 |
Active Member
Join Date: Jan 2005
Location: RDM,Oregon
Posts: 285
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Longhorn Man the 2900rpm figure is correct but thats figured with total lockup with a clutch or a locking converter,I just went through this same game when I switched a th400 for the stick in my 72. I was turning appox.300 more rpm at the same speed than before because of the slippage in the non lockup converter I used. You can check out the thread "more rpms" on page two. HTH:::::::::::COBRO
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#9 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Yeah, TH350 is 1 to 1.
I was kinda figuring that might be with no slippage. You're getting 300 RPM slippage at highway speed? That seems exsesive. I've never seen more than 200 or so. I have a TH400 converter in my Th350, so it'll either slip a bit more, or a bit less...I am pretty sure it is the latter. |
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#10 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Whats your gears & tire size, what tranny, and what's the redline?
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#11 | |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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Quote:
GEARS - STOCK 3:08'S OR 3:07'S ![]() TIRE SIZE - 35 X 12.5 X 15 BFG'S (8" RIM) TRANSMISSION - TH350 W/ NP205 REDLINE - BETWEEN 6500 AND 7000 ![]()
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#12 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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at about 6000 RPM, your blazer would be doing a theoretical 200 MPH.
This is my old beater with 3.07's and 28 inch tall tires and a non lock up TH350. |
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#13 | |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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Quote:
EXCEPT FOR THAT BIG @SS BODY CAUSING WIND DRAG ![]()
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#14 |
Registered User
Join Date: May 2004
Posts: 80
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I like to use these calculators
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1967 C10 Short,Step 283\1460 Holley HEI Ign. Borg Warner T56 6 Speed! A-1 Electric life pwr windows PS,PB,Tilt 275\60R'S on Alum Mags all around Vintage Air A\C Grey cloth Buckets ![]() |
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#15 |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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__________________
Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#16 | |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Quote:
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#17 |
Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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Andy, does your BOP turbo have the 1 1/2" speedo gears , like found in the 400 turbos? here is a slick site, for figuring speedo gears... http://www.novaresource.org/speedo.htm 69 L
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#18 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Al, 1 1/2 inch gears does sound about right...I didn't know the 400 was like that...good news I guess huh.
Thanks man. |
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#19 |
Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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Im not real familiar with the small bop turbo, but have been into the 400, in both chevy & bop style. they both take the same speedo gear setup. if you do have the 1 1/2" gears, the Nova site will get you dialed in on the gears, as well as working for the 3/4 " dia speedo gears.....that covers it from any Gm stick (early), to the Richmond I am running.... 350 turbo (chevy), & I think powerglide
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