If someone could help me with this, that would be really great. I got a ticket for doing 10 over in a 55, but the cop said I was doing 84, and I can't believe that.

I've got a base 87 NA with the 4 lug "phone dial" wheels, with the stock tire size (185/70HR14). This is in 5th gear, as well.

I have a feeling the equation will be something like cirumferece*gear ratio*RPM, and it would be in ft/min, but I could be totally wrong...

Any help would be great!! Thanks fellas!

 

84mph is approx 3500 rpm IIRC (havnt drove my 7 for a while)

 

84 mph in 5th in my 86 base is around 4200 rpm for me. And I have the phone dials.

 

On my 87 NA FC... 5th gear at between 2900 and 3000 RPM is 80 mph... 5th gear at 3400-3500ish is 90mph

 

Holy crap people, do my cars come with insane gearing or something? My 86 NA also pulls 80 at 3000ish RPM in 5th. Both the 86 and 87 are GXL's... if that has anything to do with it.

 

80 is ~3500 in my TII so id assume its a tad bit lower in a NA

 

I though <=10MPH was instantly tossed out by the judge.

Is your car "pull me over red" or "flashy graphics/open headers cuff me for racing" ??

 

it does suck to drive a loud car sometimes, soccor mom doing her makup on the cell phone can drive at 85 no one cares, as soon as i do 5 over cops start comming out of the thin air to stalk me.

 

84 approximately for me in my NA Fc with fone dials is about 2900 - 3100. I normally drive around 80 on the freeway so thats what i remember.

 

sounds like you need a new exhaust.

 

Or a better excuse.

 

http://www.carforums.net/tirecalc.php

Okay, I did some looking, and some working on this site's code, and 84 mph is 3400 RPM. Using the gear ratios and information provided from the scan of the brochure, I figured it out. That calculator is kinda helpful.

I also discovered that my speedometer is dead on at that speed/RPM.

 

^ i was about to say, in my 88t2 3000 rpm in 5th is on like 70.