gear calculator wasnt able to give me the answer..
Thread Starter
Registered User
Joined: Jan 2005
Posts: 84
Likes: 0
gear calculator wasnt able to give me the answer..
On an AP1, 2nd gear, taking it to 71mph, what will be the engine speed????? thanks in advance!!!
I am trying to calculate how much I overreved the other day
I am trying to calculate how much I overreved the other day
Community Organizer
Joined: Jul 2004
Posts: 11,936
Likes: 12
From: Charleston
Your ID says you have an Ap2. Regardless, the engine should have been spinning at about 10,200 RPM.
Someone check behind me on this....
63(mph)/9(,000 rpm) = 7(mph per 1k rpm)
63(mph) + 7(mph) = 70(mph)
9(,000 rpm) + 1(,000 rpm) = 10(,000 rpm)
add in the change and you get round about 10,200RPM...... kaboom.
Registered User
Joined: Jun 2006
Posts: 408
Likes: 0
From: Reno, NV
I'm in the same boat as you. Downshifted to 2nd at around 70 2 months ago. Rev-limiter kicks in at 62 as I found out later on. Luckily no massive failures yet, but get your valve retainers checked if you did indeed over-rev on an AP1.
Registered User
Joined: Apr 2003
Posts: 22,888
Likes: 3
From: Covington WA, USA
Originally Posted by Mulder ATO,Nov 9 2006, 09:33 PM
add in the change and you get round about 10,200RPM...... kaboom.
Keep in mind that unless you actually logged the speed and/or RPM data, your guess about what speed the tires were actually spun up to is nothing more than a reasonable guess. It all depends on tire slip and clutch slip and speedo time averaging and....
Thread Starter
Registered User
Joined: Jan 2005
Posts: 84
Likes: 0
i must have been on crack...i was looking at the speedo at 71mph and then kaboom knowingly going down to 2nd, wasn't a misshift...brain was malfunctioning at which time...banged!! saw blinking at redline and i upshifted at that instant.....sucks!!!!!!!!!
Registered User
Joined: Jun 2006
Posts: 724
Likes: 0
From: Sterling, VA
s2000amuse, what was wrong with the gear calculator? I gave it to you in a similar post you started here:
https://www.s2ki.com/forums/index.php?showt...dpost&p=9018578
Whether you calculate it the easy way or the hard way, your engine is still going to be hurtin'
https://www.s2ki.com/forums/index.php?showt...dpost&p=9018578
Whether you calculate it the easy way or the hard way, your engine is still going to be hurtin'
Trending Topics
Registered User
Joined: Oct 2000
Posts: 15,323
Likes: 28
From: Longmont, CO
According to the TurnZero gear calculator for an AP1, 71mph happens at 9640rpm in second gear if you factor in tire deformation. 9340rpm without that factor.
http://www.turnzero.com/technical_resource...gear_calculator
http://www.turnzero.com/technical_resource...gear_calculator
Thread Starter
Registered User
Joined: Jan 2005
Posts: 84
Likes: 0
hahaha...just wasn't sure how to use it that's all....So I am below 10000 rpm!! Xviper said AP1 is okay for a brief moment at 10500....so i guess i did overrev for sure but not that bad at all then!!!!! 
