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  • 2005 - 2014 S-197 Mustang -General/Talk-
  • 2005 - 2009 Specific Tech

RPM drops between shifts

  • Thread starter Thread starter davisinla
  • Start date Start date Dec 16, 2006
D

davisinla

New Member
May 17, 2003
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Grants Pass, OR
Dec 16, 2006
#1
  • Dec 16, 2006
  • #1
I just came back from a test drive of a new GT. Nice.

The one thing that bugged me was that the revs did not seem to drop between shifts. I own 3 other stick shifts (including an '87 5.0) and don't experience that with them.

Is this normal?
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
Dec 16, 2006
#2
  • Dec 16, 2006
  • #2
so you want the revs to drop???????? They do drop, but because its drive by wire, it takes a while to react.
 

bigcat

start with the upper hole, and if more traction is
May 1, 2005
3,015
1
79
7200 feet
Dec 16, 2006
#3
  • Dec 16, 2006
  • #3
yes, the stock tune makes the throttle "hang." a new tune will fix that and add a bunch of power, improve throttle respone and give you a huge !
 
D

davisinla

New Member
May 17, 2003
20
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2
Grants Pass, OR
Dec 16, 2006
#4
  • Dec 16, 2006
  • #4
iskwezm said:
so you want the revs to drop????????.
Click to expand...
Well, yes, I guess I do. Seems like kind of natural result when you lift off the throttle, doesn't it????
 
D

davisinla

New Member
May 17, 2003
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Grants Pass, OR
Dec 16, 2006
#5
  • Dec 16, 2006
  • #5
iskwezm said:
They do drop, but because its drive by wire, it takes a while to react.
Click to expand...
I can't buy that "drive by wire" is the reason. Drive by wire can be anything that's programmed. If it doesn't bug you, fine. But I happen to like a bit more response.
bigcat said:
yes, the stock tune makes the throttle "hang." a new tune will fix that and add a bunch of power, improve throttle respone and give you a huge !
Click to expand...
What's involved in a "new tune"?
 

bigcat

start with the upper hole, and if more traction is
May 1, 2005
3,015
1
79
7200 feet
Dec 16, 2006
#6
  • Dec 16, 2006
  • #6
buy a tuner (like SCT XCAL2) from a good company, use the tuner to load the tune to your car and enjoy. for about $400, its the best mod you can do to your S197.

you can visit some of the SCT tuners websites. brenspeed.com, bamachips.com, etc. another alternative to the SCT tuner is the diablosport predator. i dont have one, so i dont know who makes tunes for them.

pick up a mustang magazine, and there should be tons of ads for S197 vendors. or you could search these forums and find many good posts about tunes and tuners.
 
D

davisinla

New Member
May 17, 2003
20
0
2
Grants Pass, OR
Dec 16, 2006
#7
  • Dec 16, 2006
  • #7
bigcat said:
buy a tuner (like SCT XCAL2) from a good company, use the tuner to load the tune to your car and enjoy. for about $400, its the best mod you can do to your S197.

you can visit some of the SCT tuners websites. brenspeed.com, bamachips.com, etc. another alternative to the SCT tuner is the diablosport predator. i dont have one, so i dont know who makes tunes for them.

pick up a mustang magazine, and there should be tons of ads for S197 vendors. or you could search these forums and find many good posts about tunes and tuners.
Click to expand...

Thanks for the advice, amigo.
 
W

Warlok

New Member
Oct 11, 2006
89
0
0
Dec 16, 2006
#8
  • Dec 16, 2006
  • #8
Normal

davisinla said:
I just came back from a test drive of a new GT. Nice.

The one thing that bugged me was that the revs did not seem to drop between shifts. I own 3 other stick shifts (including an '87 5.0) and don't experience that with them.

Is this normal?
Click to expand...

Yes Sir it is the way they are stock. It has to do with polution control, by burning up a bit more gas before it goes out the exhuast. I tuned it out with my SCT X cal 2. It wont bother you after you tune to a 93 octane tune like I have on my 07 GT.

I run a Brenspeed Tune and have a C&L CAI with Pypes axel backs. Best time on stock street tires and 15 lbs of air in them was 12.94 at 110mph. But I normally run in the low 13's. You'll love it!
 

iskwezm

10 Year Member
May 24, 2005
4,159
20
79
Rowland Heights,California
Dec 17, 2006
#9
  • Dec 17, 2006
  • #9
davisinla said:
I can't buy that "drive by wire" is the reason. Drive by wire can be anything that's programmed. If it doesn't bug you, fine. But I happen to like a bit more response.
Click to expand...
I didnt say it doesnt bother me, but i guess I didnt understand your question. I thought it was better to keep the rpms up durring shifting.
 
D

davisinla

New Member
May 17, 2003
20
0
2
Grants Pass, OR
Dec 17, 2006
#10
  • Dec 17, 2006
  • #10
iskwezm said:
I thought it was better to keep the rpms up durring shifting.
Click to expand...
When downshifting, yes. It's good to rev the engine to where the RPMs will be after you release the clutch in the lower gear. That's what "heal and toe" shifting if for. You blip the throttle to get the revs up - "rev matching".

However when upshifting, you (or at least I) want the RPMs to fall naturally (and quickly) to where they'll be when the higher gear is engaged.
 
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