Drag Racing Tech
Sponsored by:
Sponsored by:

Best rpm to shift at? Is it right before redline?

Thread Tools
 
Search this Thread
 
Old 11-30-2001, 09:13 AM
  #1  
Staging Lane
Thread Starter
 
MI_SS_IL's Avatar
 
Join Date: Nov 2001
Location: Ottawa, Ontario, Canada
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
Default Best rpm to shift at? Is it right before redline?

What's the best rpm to shift at at the strip? This is assuming you have 3.42's. If I understand correctly we make peak power at 5500rpm and after that it falls off. Now I know most people take it almost up to redline (5900rpm or so), but I've seen some guys say that they shift at 5500rpm and I've seen them get some pretty good times doing that. Some of you 10's and 11's M6 guys should be able to answer this.

Chris
Old 11-30-2001, 09:30 AM
  #2  
TECH Apprentice
 
BBYZED's Avatar
 
Join Date: Nov 2001
Location: Ottawa
Posts: 314
Likes: 0
Received 0 Likes on 0 Posts

Default Re: Best rpm to shift at? Is it right before redline?

I try to get it as close to the ~6200 rpm redline as possible. It is harder to be consistent with the shifting unless you get a shift light. I haven't hit the limiter yet while on the track (but did on the street a few times until I got the shift timing down).
Old 11-30-2001, 11:12 AM
  #3  
LS1Tech Co-Founder
iTrader: (38)
 
Nine Ball's Avatar
 
Join Date: Nov 2001
Location: Houston, TX
Posts: 32,987
Likes: 0
Received 46 Likes on 19 Posts

Default Re: Best rpm to shift at? Is it right before redline?

Stock limiter is at 6250 rpm. Shift as close to that as possible for the best track times.

Tony
Old 11-30-2001, 04:39 PM
  #4  
TECH Senior Member
 
BIGBOS's Avatar
 
Join Date: Nov 2001
Location: Chi-Town, IL
Posts: 11,603
Likes: 0
Received 0 Likes on 0 Posts

Default Re: Best rpm to shift at? Is it right before redline?

The stock tach's are dogs, you can either get a new tach with a shiftlight or just a shiftlight, I have the 5" autometer tach (silver) it looks pretty good and works like a charm...impossible to hit the limiter with its accuracy <img src="images/icons/smile.gif" border="0">
Old 11-30-2001, 05:51 PM
  #5  
Staging Lane
Thread Starter
 
MI_SS_IL's Avatar
 
Join Date: Nov 2001
Location: Ottawa, Ontario, Canada
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

McRat, where'd your post go? Can you put it up again? I want to copy that chart.

Thanks

Chris
Old 11-30-2001, 06:00 PM
  #6  
TECH Fanatic
 
racer88's Avatar
 
Join Date: Nov 2001
Location: Holly Springs NC
Posts: 1,379
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

The Autometer #3905 is really nice. Tach and light combo and you can dial in up to 8K.

<img src="images/icons/smile.gif" border="0"> Stock gauges suck, very hard to judge.
Old 11-30-2001, 08:52 PM
  #7  
TECH Resident
 
Dave's Avatar
 
Join Date: Nov 2001
Location: san diego ca
Posts: 854
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

Can you recommend which shift light? <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />
Old 12-01-2001, 12:05 AM
  #8  
Staging Lane
Thread Starter
 
MI_SS_IL's Avatar
 
Join Date: Nov 2001
Location: Ottawa, Ontario, Canada
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

[quote]Originally posted by <font color=#000099>Nine Ball</font>:
<strong>Stock limiter is at 6250 rpm. Shift as close to that as possible for the best track times.

Tony</strong><hr></blockquote>

Is it possible that the tach is off on mine because I seem to hit the limiter when it looks like 6100 or so? It's hard to tell when I'm concentrating on everything else though so maybe I'm just seeing things.

Chris
Old 12-01-2001, 12:30 AM
  #9  
Staging Lane
Thread Starter
 
MI_SS_IL's Avatar
 
Join Date: Nov 2001
Location: Ottawa, Ontario, Canada
Posts: 85
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

That answers my question. Quite thoroughly I might add. Thanks McRat.

Chris
Old 12-01-2001, 12:32 AM
  #10  
UNDER PRESSURE MOD
iTrader: (19)
 
The Alchemist's Avatar
 
Join Date: Nov 2001
Location: Doylestown PA
Posts: 10,813
Received 13 Likes on 10 Posts

Default Re: Best rpm to shift at? Is it right before redline?

My current problem is not hitting the limiter, but relearning to shift higher after having the limiter raised after doing heads and cam.

I am making great power all the way up to the limiter 6600 but I can't get out of the routine of shifting at 5900 to avoid the limiter.

I reset the shiftlight to 6350 (so I don't tag the limter) but the mind still wants to shift at 5900.

Oh well. I know there is still hidden time with just learning how to wait a split second longer between shifts....lol

<img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" />
Old 12-01-2001, 06:25 PM
  #11  
Launching!
 
Jacobi's Avatar
 
Join Date: Nov 2001
Location: St. Paul, MN
Posts: 220
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Best rpm to shift at? Is it right before redline?

[quote]Originally posted by Dave:
<strong>Can you recommend which shift light? <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" /> </strong><hr></blockquote>

The Harlan shiftlight seems to be the best right now, if you don't want the tach to go with it. You can order them from him now with about a 1 week turnaround time. I know someone here will post his website. <img src="images/icons/cool.gif" border="0">




All times are GMT -5. The time now is 02:22 AM.