On Fri, 28 Jan 2000, W. Lee Hendrick wrote: > At 4:19 PM -0500 1/28/00, Andrew Traenkner wrote: > >My '88 hits the rev limiter at 7300RPM(recently checked). That means it > >would be spinning 3650RPM at 62MPH. I could be wrong, but me thinks that's > >a little high. > > That would be too high. I believe the 124mph is based on > 6800RPM, with the 0.91 5th and 3.67 final drive. That would give an > engine speed of 3290 rpm at 60 mph, which sounds about right. If you > see much less than 3000RPM @ 60mph with stock tires and this gearing, > then your tach or speedo (or both) are way off. BTW, I believe the > 6800RPM is the maximum recommended _continuous_ engine speed for the > 1.8l (and the redline for the 2.0l) 16V motors, whereas 7200 (or is > it 7400?) is the maximum recommended _instantateous_ engine speed. > Yes, the rev limiter on a 1.8l usually doesn't usually kick in until > over 7K, and it's fine to rev it up that high during acceleration, > but I personally would not punish my car by top speed testing over > 6800RPM. So, the car is limited to a top speed of124mph following the > _factory_ specs and recommended engine speed and is, in that respect, > rev limited. I guess my point is that even if the car didn't have a > rev limiter, it would still be 'rev limited' to the speed at factory > redline, even if it could still accelerate. YMMV, of course, if > you're willing to push it past that point! >
Ok, time to finish this. I've seen a billion numbers flying around and they are almost all wrong. According to http://www.volkswagen.org/tiresize.htm: With 3.67 R&P .91 5th 185/60-14 tires 3000 RPM = 60 MPH 4000 RPM = 81 MPH 5000 RPM = 101 MPH 6000 RPM = 121 MPH 6150 RPM = 124 MPH 6800 RPM = 137 MPH 7000 RPM = 141 MPH 7200 RPM = 145 MPH This jibes exactly with the behavior that I've seen on my 89 GTI. Honestly, did no one else notice this? It's too perfect to miss. In 5th gear, 1000 RPM translates almost EXACTLY to 20 mph. There's nothing that can change this, short of tire size or gear changes (but you all already knew that!) As for the 124 MPH top speed- I believe this is drag limited. It may be electronically limited, but I doubt that's the case on my CIS-E car... not possible. -- John Caldwell [email protected] 89 GTI 16v _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
