what rpm am i at in 4th gear??
04-12-2006, 12:38 PM
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what rpm am i at in 4th gear??
i have a b16 tranny with 205/50/15 tires. and im at 5000rpms@60mph in 4th gear.
is there a site that will tell me what rpms i would be at with 235/60/15?
autocrossing.com will tell me what speed i will be at redline for every gear, but i need to know what rpm i will be at, at 70mph with 235/60/15
is there a site that will tell me what rpms i would be at with 235/60/15?
autocrossing.com will tell me what speed i will be at redline for every gear, but i need to know what rpm i will be at, at 70mph with 235/60/15
04-12-2006, 12:51 PM
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Re: what rpm am i at in 4th gear?? (mrchaos)
MPH = (RPM)(TIRE DIAMETER in inches) / (GEAR RATIO)(FINAL DRIVE) (336)
60={(rpm)(26.1)}/{(1.107)(4.40)(336)}
http://www.miata.net/garage/tirecalc.html <--- tire size calculator
not bringing up the fact that depending on what car you have, that tire size is more than 11% too big, which will be killing your acceleration and throwing off your speedo and odometer by the said amount
60={(rpm)(26.1)}/{(1.107)(4.40)(336)}
http://www.miata.net/garage/tirecalc.html <--- tire size calculator
not bringing up the fact that depending on what car you have, that tire size is more than 11% too big, which will be killing your acceleration and throwing off your speedo and odometer by the said amount
04-12-2006, 12:53 PM
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Re: what rpm am i at in 4th gear?? (Voyage34)
im not good at math, i dont understand what you mean.. can you figure out what rpm's i would be at in 4th@70mph with 235/60/15? tia
04-12-2006, 02:36 PM
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04-12-2006, 03:22 PM
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Re: what rpm am i at in 4th gear?? (vtaaakkkk!!!)
Only 9"?!?! That's HUGE.
What car did you see at the track with those tires? Was it a Civic? Was it a drag only car and not a street driven car?
205 - 215 is about the limit for a street driven Civic.
What car did you see at the track with those tires? Was it a Civic? Was it a drag only car and not a street driven car?
205 - 215 is about the limit for a street driven Civic.
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