Need a Gear Mathemetician
12-27-2002, 09:57 PM
#1
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Need a Gear Mathemetician
Heck I can't even spell it! :blueangel:
Assume the following is true:
* A bloke's Tach stopped working :cuss
* He has 225/70r15 rubber ~ 27.4 inches tall
* He has a Turbo 350 with first gear=2.48 and second gear=1.48
* He has a 3:08 Posi rear end
* He Needs to Know! where to approximate 5,000 shifts at what speed out of first and second gear?? :cheers:
Who knows how to figure that one out?? I'm ready to romp on the 388 but the tach don't tach no more :mad :rolleyes:
Assume the following is true:
* A bloke's Tach stopped working :cuss
* He has 225/70r15 rubber ~ 27.4 inches tall
* He has a Turbo 350 with first gear=2.48 and second gear=1.48
* He has a 3:08 Posi rear end
* He Needs to Know! where to approximate 5,000 shifts at what speed out of first and second gear?? :cheers:
Who knows how to figure that one out?? I'm ready to romp on the 388 but the tach don't tach no more :mad :rolleyes:
12-27-2002, 10:07 PM
#2
Le Mans Master
Re: Need a Gear Mathemetician (SanDiegoPaul)
Pehaps this wll give you some help :) .
Keep us posted on that new heart beat results ;) .
http://fast.race-cars.net/calculator...alculator.html
Keep us posted on that new heart beat results ;) .
http://fast.race-cars.net/calculator...alculator.html
12-27-2002, 10:44 PM
#3
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Re: Need a Gear Mathemetician (SanDiegoPaul)
50 mph 1st gear
87 mph 2nd gear
130 mph 3rd gear
Ought to be pretty close. These are the numbers from my car, the only difference is it is a TH400 and I have 255/50-15 meats, that are about 26.6" tall.
I know this because I ran it through the gears today :D 130 was fun and the ZZ4 got there real fast! :lol:
If you want a tach you can do what I did, I went to Autozone and bought a $35.00 Sun tach and a big hose clamp, and put it on my steering column until I decide to either convert my tachdrive distributor to HEI or install a 75 electronic tach in the dash.
87 mph 2nd gear
130 mph 3rd gear
Ought to be pretty close. These are the numbers from my car, the only difference is it is a TH400 and I have 255/50-15 meats, that are about 26.6" tall.
I know this because I ran it through the gears today :D 130 was fun and the ZZ4 got there real fast! :lol:
If you want a tach you can do what I did, I went to Autozone and bought a $35.00 Sun tach and a big hose clamp, and put it on my steering column until I decide to either convert my tachdrive distributor to HEI or install a 75 electronic tach in the dash.
12-27-2002, 11:04 PM
#4
Melting Slicks
Re: Need a Gear Mathemetician (SanDiegoPaul)
SMOKEmUP.com has a very easy to use calculator for determining RPM vs. speed at this link> http://www.smokemup.com/auto_math/mph_range2.php
12-28-2002, 01:30 AM
#5
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Re: Need a Gear Mathemetician (MIKER)
Thanks all!
Tonight it got beat up hard! :cheers: :flag :conehead :hat
Errr, Ahh, my foot got stuck. .... errrrr, ahhhh I was in a hurry .... :D :yesnod: :yesnod: :yesnod: :yesnod: :lol: :yesnod: :lol:
I visited the engine builder and the first Q he asked was what the Dyno readings were. I told him that we have been REAL busy at The Dyno Shop and my car was last on the list .... :mad
He reminded me that I can do whatever the heck I wanna do with the motor. So I took off out of his parking lot and got on it hard. ... it surprised the hell outta me! Whooooaaaaaaa them Reindeer!
Of course, with 3:08 gears I was headed for the freeway. And my foot got stuck again :lol: :lol: :lol: :yesnod: :lol: :yesnod: :lol: :blueangel: :blueangel: Honest, it was an accident! :lol: :lol: :lol: :lol: :lol: :lol:
Well, the good news is, that I didn't need to call a tow truck. My only prob was not knowing the RPM band I was in ... and your information above helps. Heck I don't think I even broke 4500 and it was awesome!
Tonight it got beat up hard! :cheers: :flag :conehead :hat
Errr, Ahh, my foot got stuck. .... errrrr, ahhhh I was in a hurry .... :D :yesnod: :yesnod: :yesnod: :yesnod: :lol: :yesnod: :lol:
I visited the engine builder and the first Q he asked was what the Dyno readings were. I told him that we have been REAL busy at The Dyno Shop and my car was last on the list .... :mad
He reminded me that I can do whatever the heck I wanna do with the motor. So I took off out of his parking lot and got on it hard. ... it surprised the hell outta me! Whooooaaaaaaa them Reindeer!
Of course, with 3:08 gears I was headed for the freeway. And my foot got stuck again :lol: :lol: :lol: :yesnod: :lol: :yesnod: :lol: :blueangel: :blueangel: Honest, it was an accident! :lol: :lol: :lol: :lol: :lol: :lol:
Well, the good news is, that I didn't need to call a tow truck. My only prob was not knowing the RPM band I was in ... and your information above helps. Heck I don't think I even broke 4500 and it was awesome!
