 901 gearbox questions and, How fast am I really going? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| thelogo |
 Sep 24 2017, 08:52 PM
Post
#1
|
|
Senior Member  Group: Retired Members Posts: 1,510 Joined: 6-April 10 Member No.: 11,572 Region Association: None  |
Any backround info on this trans appreciated
But more specifically Q. Does gearing or gear ratio determine the cars Speed, combined with rpm no matter what engine Power you have Q. With a more poweerful then stock engine how does that Affect my cruise rpm Q. What is stock 5th gear good up to 90mph ? Q. Never down shift to 2nd gear right Do not abuse 1st Q. If money was no object what trans would be ideal for a 914 Shout out to the cheap sob |
   |
 
|
  |
Replies
| PlaysWithCars |
Sep 28 2017, 09:53 PM
Post
#2
|
|
Senior Member Group: Members Posts: 532 Joined: 9-November 03 From: Southeast of Seattle Member No.: 1,323 Region Association: Pacific Northwest 
|
QUOTE(thelogo @ Sep 27 2017, 12:55 PM)  I'll attempt to confirm 83mph at 3500 rpm with gps But something tells me that a bit on the high side . I think its more like 75 mph (IMG:style_emoticons/default/bye1.gif) You could have a non-standard 5th gear, but its doubtful. More than likely you have tires that are less than 25" in diameter. (note that piece of info at the top of the gear chart posted by Steve.) Speed at rpm can be calculated by referencing the gear chart and multiplying by the ratio of (your tire diameter)/25". You can find your tire diameter, or a very close approximation, by looking up your tire size on TireRack and looking at the spec sheet. |
|
|
|
Posts in this topic
thelogo 901 gearbox questions and Sep 24 2017, 08:52 PM
r_towle Yes Sep 24 2017, 09:02 PM r_towle G50 Sep 24 2017, 09:03 PM r_towle See gear ratio charts at carquip Sep 24 2017, 09:03 PM
thelogo
See gear ratio charts at carquip
Looked but s... Sep 27 2017, 10:03 AM Dave_Darling From these questions, I'm not sure you underst... Sep 24 2017, 10:38 PM mlindner Nice explanation Dave, Thanks, Mark Sep 25 2017, 05:37 AM Steve Here's a gear chart
Sep 27 2017, 10:30 AM Steve ZD is the stock 5th gear.
Here is a page with more... Sep 27 2017, 10:31 AM Matt Romanowski In my experience, it takes a lot of power to get a... Sep 27 2017, 12:23 PM r_towle
In my experience, it takes a lot of power to get ... Sep 29 2017, 06:57 AM GeorgeRud Most reliable way is to use a GPS speedometer app ... Sep 27 2017, 12:37 PM bernbomb914 my trans has c ,1st. 904 2nd, std. 3,, v 4th, ha 5... Sep 27 2017, 01:19 PM thelogo I'll attempt to confirm 83mph at 3500 rpm wit... Sep 27 2017, 01:55 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 14th March 2025 - 12:53 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.