1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

MPH at redline of each gear

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Old 02-24-15, 11:40 PM
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MPH at redline of each gear

I bought my first rx7 last weekend, and I'm in the process of making it street legal. Its a 1985 gsl-se 5 speed 13b with a bridgeport, and full intake and exhaust. Love the car but have no idea how fast im going. I havent driven a lot because i still need to wire some things up. Ive searched for about an hour and cant find anything just wondering if anyone had this information.
Old 02-25-15, 08:07 AM
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Waffles - hmmm good

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Go to one of those free sites that let you enter the gear ratios, rear end ratios and tire size
then you can calculate the speed based on the RPM. I did this at one point because my speedo
was acting up to I made a small cheat sheet that fit in my ashtray.

Just use google to look up the GSL-SE ratios and tire size you have then go to a site like this:

Gear Ratio Speed Calculator

I've not used this one but you get the idea.
Old 02-25-15, 10:22 AM
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You can use a free app on your phone. I have used SpeedView which has been accurate within about 1mph
Old 02-25-15, 11:24 AM
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Thanks ill try both when i get some time. I forget there are apps for almost anything lol
Old 03-08-15, 10:29 PM
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Any update?
Old 03-09-15, 10:18 PM
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Never messed with the website, and once turn signals are wired up ill be able to her the car on the road. I would drive on some back roads, but i got on it a couple times before i had the app and cops rolled by... The car is ridiculously loud.
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