Home page
  Home Page   Contact Us   Our History   Advertise with Us   Sponsor List   Link to Us   Compare Levels   Member Agreement   Privacy Policy   About C3VR
  Community Forums   Active Threads   Forum Search   Top Posters List   Private Messenger   C3VR Email System
  Members Vettes & Pictures   Member Stories   Member Stats   Real Time Member Map   Member Search   Lifetime Member List   Member Calendar Entry Form   Who's Online
  C3 Registry Data   C3 Corvette Statistics   C3 Corvette Tips & Tricks   C3 Corvette How-Tos   Corvette Club Listing   Corvette Event Listing   Mechanic Directory   Corvette VIN Decoder   Save the Wave   Corvette Emblem History   C3 Corvette Birthday Calculator   C3 Corvette Build Dates   Corvette Parts Illustration Catalog   Shark Bytes - Online
  C3 Corvette Parts Auctions on eBay   Corvette Books   C3VR Member Name Badges   C3VR In-Stock Apparel & Accessories   C3VR Custom Apparel & Accessories @ Zazzle   C3VR Window Stickers   C3VR Member Deals & Discounts   C3VR Member Calendars   Shop Amazon.com
☰
SPONSOR AD

Support our Vendors!  |  Advertise Here

Topic: RPM?

in Forum: C3 General Discussion


Already a Member?
Login
Not yet a Member?
Register for Free!

New Topic New Topic
Post Reply Reply
New Poll New Poll
Search Search
Hide Signatures
RPM? (1/3)
 6/10/13 9:00pm
RedVetteinprogress
Former Member
Send Private Message

West Bend, WI - USA

Vette(s):
1985 silver coupe & 1975 red coupe

Joined: 3/18/2010
Posts: 46

I recently bought a 1981 Vette that is all stock. It has an automatic transmission and at 70mph the thing tachs 3000rpm. Does that sound about right? I would have thought with a 2:87 gear in back my rpm's would be lower than that assuming the tach is reading correct. What do you guys think. Thanks much, Darrell

Reply Reply
Quote Reply w/Quote
Our Sponsors help support C3VR
Re: RPM? (2/3)
 6/10/13 10:40pm
Adams' AppleLifetime Member
Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20128

Assuming that you actually still have the 2:87 gears, it is high. With 3:36 gears in my '74, 3000rpms is just over 75mph. Your gears may have been swapped somewhere down the line, from the looks of it. It could be a problem with the tack, but I would lean more towards the gears having been changed.

______________

Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Reply Reply
Quote Reply w/Quote
Re: RPM? (3/3)
 6/11/13 1:50am
tb2k82ceLifetime Member
Lifetime Member
Send Private Message

Lemon Grove, CA - USA

Vette(s):
1982 C3 Collectors Edition 44000 miles, sat in the sun most of its life, My wife purchased it for me for Father's Day in 2007 from her girlfriend that had it for 19 years. It is on the road again. I'm retired but it is now my daily driver.

Joined: 10/17/2007
Posts: 2041

How sure are you of your speed?  Change your wheel size a little or just stock and your Speedo could be 10% off easy.  I checked mine with my Gramin and found that it was 10% off had to change the speed gears on the transmission.  

You might want to confirm your speed before you get going to far.  Of course you can do that on a lot of California highways with the mile markers they have set up for that purpose. 
Reply Reply
Quote Reply w/Quote
Our Sponsors help support C3VR