Best shift point on NPI 98 GT 5 speed

Mar 30, 2005
602
0
17
33
mtn home arkansas
ok guys I need to know the best RPM to shift at on a 98 GT with Npi heads. I have a set of 4.30's in the rear, and soon to be mac o/r H pipe, flowmaster 1 chambers. Were would you guys think would be the best possible place to shift at.
 
  • Sponsors(?)


CanadaStang

New Member
Sep 7, 2003
2,093
1
0
Mb
Visit site
98blackstallion said:
ok guys I need to know the best RPM to shift at on a 98 GT with Npi heads. I have a set of 4.30's in the rear, and soon to be mac o/r H pipe, flowmaster 1 chambers. Were would you guys think would be the best possible place to shift at.
When I still had the NPI heads, I found I would get the best times if I shifted at 5400rpm from 1st to 2nd, and the rest of the shifts at 5200rpm. But that was with the stock 3.27's
 

Gearbanger 101

Straight Outta Locash
Super Mod
Aug 10, 2002
9,457
1,376
234
Ontario, Canada
Since most stock tach's are out to lunch, the rule of thumb is......find out where it starts falling on it's face and shift about 200rpm after it stops producing power.
 

edbo

New Member
Mar 31, 2005
198
0
0
Valley, AL
quiksilver98 said:
When I had the non-pi motor shift points were
  • 1st gear: 5200 rpm
  • 2nd gear: 5500 rpm
  • 3rd gear: 5600 rpm
  • 4th gear: 5800 rpm
:stupid:

I usually hit 5500 2nd to 3rd and 3rd to 4th. Little higher going into 5th at approx 5700-5900 rpm. Managed under 15 secs in 1/4 mile with 4.10s (still completely stock NPI motor) and mine is a 'vert.
 

mrvax

Stay thirsty my friends
Founding Member
Nov 29, 1999
5,225
2
79
SN Moderator: Orlando, Fl.
A good baseline is to add 10% rpm to the peak HP rpm value. For example, if you make your max HP at 5000 rpm, then 5000 + 10% (500) = 5500 rpm.
 
Thread starter Similar threads Forum Replies Date
1NSTY2VSLN Best Shift Point?? SN95 4.6L Mustang Tech 2
Redsnake2 Whats the best Shift points for an AODE?????? 1994 - 1995 Specific Tech 13
Bad Saleen where is the best shift point for a 2002 gt ?????? SN95 4.6L Mustang Tech 27
sade04 Best Shift Points for a 94 GT!!?? 1994 - 1995 Specific Tech 26
I whats the best shift points for auto 1994 - 1995 Specific Tech 27
Bad Saleen Where is the best shift point ????? 1994 - 1995 Specific Tech 0
J Best Shift Kit For A Daily Driver? 1996 - 2004 SN95 Mustang -General/Talk- 2
Paul Randle According to this dyno sheet when is the best time to shift??? Fox 5.0 Mustang Tech 18
B Best Shift kit for a 4r70 1996 - 2004 SN95 Mustang -General/Talk- 13
method628 Best shift light & single or dual stage? 2005 - 2014 S-197 Mustang -General/Talk- 2
R Best Transgo shift kit? 1994 - 1995 Specific Tech 7
C What's the best Shift Knob to drag race with? 1996 - 2004 SN95 Mustang -General/Talk- 8
bad98rt Best way to shift an AOD? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 18
Roland69 Best leather shift knob 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 37
BurningRubber Best shifting method? 1996 - 2004 SN95 Mustang -General/Talk- 15
JUCD 5.0 The best shift kit for an AOD?? Fox 5.0 Mustang Tech 5
PhLoBuS Best/Quality shift kit Fox 5.0 Mustang Tech 4
93redone What RPM is best to shift at? 2.3L (N/A & Turbo) Tech 3
huskerpower02 Best Shift Kit? 1994 - 1995 Specific Tech 8
4Jenna Best place to Buy Shift Boot Fox 5.0 Mustang Tech 5
S Best RPM to shift at? SN95 4.6L Mustang Tech 34
axeman is it best to shift so the rpms fall to peak torque range? Fox 5.0 Mustang Tech 4
R Best RWL Tires For a 1971 Mach 1 that will be driven? 1965 - 1973 Classic Mustangs -General/Talk- 0
7991LXnSHO Best torque boxes currently? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 19
D Best upgrades for fuel system? 00 GT 4.6 2v Digital Self-tuning Forum 1
K Best way to clean 4.6L DOHC upper and lower intake manifolds? 1996 - 2004 SN95 Mustang -General/Talk- 3
R Best clutch cable replacement 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 20
B “Best” Budget Aftermarket Flywheel. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
Saine65 Best Efi Route 1965 - 1973 Classic Mustangs -General/Talk- 7
E Best tires for 88 Foxbody GT? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
L Exhaust Best Fox exhaust Fox 5.0 Mustang Tech 4
R The best page The Welcome Wagon 1
Blucifer99 Pop and bang tunes...... best and safest way to make them? Digital Self-tuning Forum 4
95TT347Cobra BEST SWAP OPTIONS! 05 GT 4.6 3v (Threw Rod), I have a 4.6L 2v out of an 04 GT and 4V in A mark. Suggestion? 2005 - 2009 Specific Tech 2
M What intake is best for me? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 22
R Best loudest exhaust for 89 gt? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 13
D 1999 mustang gt best direction to go?. 1996 - 2004 SN95 Mustang -General/Talk- 5
MrPerfect2 Best antifreeze for cooling properties 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 24
1989FoxFan Interior and Upholstery Best Brand of Top for First Time 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 12
Schnelly Best 1/4 Mile times 2005 - 2014 S-197 Mustang -General/Talk- 1
S Best 99-04 Mustang GT clutch kit replacement? SN95 4.6L Mustang Tech 1
0 Drivetrain Best Clutch and Flywheel Combo? SN95 4.6L Mustang Tech 4
D Whats the best intake for me? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 6
Noobz347 Best Commercial on the INterwebz - S550 Widebody 2015+ (S550) Mustang -General/Talk 0
S Best dual plane intake for small block Windsor Other Auto Tech 19
P Best coil packs for a 96 mystic cobra SN95 4.6L Mustang Tech 18
Woody3882 Best location for exhaust cut outs 1965 - 1973 Classic Mustangs -General/Talk- 1
C Best transmission for 98 cobra? SVT Tech Forum 3
silverlx50 Engine What is the best way to lift lower intake off? Fox 5.0 Mustang Tech 7
MrPerfect2 Which brand gears and install kit has best quality parts 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
Similar threads