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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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12-10-2010, 10:30 AM
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#16 |
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Waffles - hmmm good
Join Date: Aug 2008
Location: Huntersville, NC
Posts: 757
Rep Power: 0  |
Your cable may need to be lubricated. Or theres moisture in the speedo and its
affecting the magentic pickup for the spinning cable or something.
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs Project Fat Nikki Budget 12A rebuild Video setup < $30.00 |
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12-10-2010, 01:04 PM
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#17 |
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Rotary Fanatic
Join Date: Feb 2008
Location: Gresham, OR
Posts: 473
Rep Power: 18 |
usually when your speedo is on its way out the needle bounces. that gets annoying quick.. im going 60- no wait, 30, 80? wtf
when in doubt, go the same speed as everyone else lol
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12-10-2010, 04:34 PM
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#18 |
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Mazda Lover
Join Date: Aug 2010
Location: Akron, Ohio
Posts: 319
Rep Power: 16 |
Lol, i use gps for my speed 80% of the time. Although, i do use cruise alot, and if tue cable dies im screwed in that mannor.
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 2004 Mazda6 V6 5-spd - still waiting on money for a motor 1991 Mazda RX7 NA 5-spd - my new DD with 145,000 miles |
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12-11-2010, 12:46 AM
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#19 |
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The quest for more torque
Join Date: Sep 2008
Location: Sheboygan, Wisconsin
Posts: 855
Rep Power: 18 |
I have the opposite problem, mine reads high when cold and makes this obnoxious squealing/grinding/whining sound (you almost have to hear it). After the interior warms up, it becomes quiet and semi-accurate.
ReTED, I am jealous that you have a functional speedometer on the dyno, mine apparently only reads up to about 80MPH (even though I was pulling to 165 MPH). The VSS to the ECU is accurate, but the needle on the gauge is not. Obviously I wouldn't have any way of figuring this out on the street...
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1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic) |
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12-11-2010, 06:42 AM
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#20 | |
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RCC Addict
Join Date: Mar 2008
Location: Honolulu, Hawaii USA
Posts: 1,813
Rep Power: 19 |
Guess I'm lucky?
But I did replace my original speedo cable soon after I got this car back in '97 or so... I've maybe put on 30k miles on it since - it doesn't get driven that often. It is kinda unnerving to put down a 4th gear run though as you see the speedo sweep past 100mph, and you're sitting inside going no where on the dyno runs...  -Ted
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reted_2000@yahoo.com Technical Advisor FC3S Pro http://fc3spro.com/ Quote:
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12-11-2010, 01:05 PM
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#21 |
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Mazda Lover
Join Date: Aug 2010
Location: Akron, Ohio
Posts: 319
Rep Power: 16 |
Hmm, I am assuming this is the original cable, at 140k now, and it consistently reads 5 higher than I am actually going. Consistent is enough for me. I am following the key rule, If it works at all, don't touch it.
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2004 Mazda6 V6 5-spd - still waiting on money for a motor 1991 Mazda RX7 NA 5-spd - my new DD with 145,000 miles |
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