Naturally Aspirated, 5-speed cars in here.....

[Croft]

What rpm are you shifting at? Have you had your car on the dyno?

It seems that we are trapping about the same speed. I have 4.10s and am running the same tire size and am going through the trap in 4th gear.

 

[08Bullitt2291]

No i haven't.. Taking it to JPC after the new year and getting JBA Lts and H with no cats and hot rod cams so ill get a befor and after when i do that.. powershifting at 6500

 

[Croft]

My opinion, you might be shifting at too high of an rpm. If your rev limiter from stock was originally set at 6500 and you are shifting at 6500, you might be shifting at the point where you are starting to lose power in your power curve. Obviously with power shifting you want to be in your power curve.

I haven't mastered the power shifting technique yet, but I shift right around 6200.


Somebody with more expertise will hopefully chime in..............I am still learning.

 

[08Bullitt2291]

Yeah i would like to see what its doing on the dyno.. but since all the changes i am doing this winter i am sure ill have figured something out and found all new problems. just really want that nasty idle eps out of a car that most people dont even know what it is and ask if its a v6 and say its the coolest v6 they have ever seen... but i have won lots of money that way....

 

[CameronPage]

Year: 2005
Type: Mustang GT
Power: 300rwhp/316rwtq
Engine: 281
a. C&L Racer
b. Saleen underdrive pulleys
c. Steeda delete's plates
d. jba long tubes with o/r h pipe and side exhaust
e. ported and polished throttle body with spacer
Trans: stock
Gear: 3.73

Tire and Size: 255-35-20 nittos on front with 26in nitto 555r drag radial on 16's rear

Full weight with little less than 1/4 tank of gas

Best 1/8th mile - 8.07 @90 mph 1.69 ft 60'

launching at 3500 and shifting at 6500 with my bama chips tune *without the 100 shot...havent been back to spray it at the track yet or with the slicks*

new mods - mgw short throw..zex 100 shot...xxx dyno tuned... max motorsports lca and che uca..m/t slicks on 15's (i really need a driveshaft lol)..

 

[TorchedGT]

i ran my best times shifting at 6k with a 5k launch rpm

 

[jroc07gt]

the higher i shifted the better my times got and gained mph. that could just be cuz i have delete plates and o/r x pipe.

 

[jroc07gt]

Just wondering. When i was running street tires i was doing about 106 through the traps and when i changed over to my radials that are shorted it killed my mph i was doing about 100 or 101 if i was lucky. the et. changed also when i ran the car on street tires it ran 13.30s or .20s befor i tuned it with the radials it was running .40s to .60s? any guesses?


Stock 08 bullitt with mt radials and tune
best run 12.95 @ 102mph

thats odd cuz my trap is a consistent 110 and im running the nitto drag radials which are the shortest ones you can get.

 

[08Bullitt2291]

what is the size of the tire?

 

[marcspaz]

I was running 28" DR's with 4.56 gears when I ran my best time on the 3650 and heads and cams. I ran a 26" DR from a friend one day while I had my 4.10's and got my best ET with my stock heads and cams.

Honestly, I would have to take the car down the track and see how it feels, something doesn't sound right.

 

[qwikhuh]

My opinion, you might be shifting at too high of an rpm. If your rev limiter from stock was originally set at 6500 and you are shifting at 6500, you might be shifting at the point where you are starting to lose power in your power curve. Obviously with power shifting you want to be in your power curve.

I haven't mastered the power shifting technique yet, but I shift right around 6200.


Somebody with more expertise will hopefully chime in..............I am still learning.

I would never shift a stock motor car at 6500 without at least deletes and/or cams. Mine falls off big time up that high. I shift every gear at 6200 and trap at 6000. 6200 launch on ET Streets, 5000 launch on Et Street Radials

 

[qwikhuh]

Year: 2005
Type: Mustang GT
Power: 301rwhp/311rwtq before longtubes
Engine: 281
a. JLT Street tune by CJ Pony
b. UDP's
c. BMR uppers, lowers, sway bar delete, rear sway relocation
d. Steeda driveshaft
e. Pro 5.0 shifter
f. Bogarts with Et Steets and ET Fronts
g. BBK longtubes and X pipe with cats
h. FRPP axle back
Trans: 3650 (stock)
Gear: 4:10
Tire and Size: 26 x11.5 x 15 Et Street 275 40 17 ET Street Radial
Best 60 foot: 1.62 15 in Et Streets 1.69 17 in Et Street Radials
Best E.T. 1/8th mile: [email protected] 15 in ET Streets
Best E.T. 1/4 mile: 11.99@113 15 in ET STreets, 12.22@112 17 in ET Streets

Launch at 5000 on 17s and 6200 on 15s. Shift every gear at 6200

 

[08Bullitt2291]

well its a bullitt and it pulls rite to 6500 if it werent the winter i would try a day at the track shifting lower to see if that would make any difference but oh well its going to be a long boring winter......

 

[08Bullitt2291]

i only always took it up to redline because in the articals when they ran it they did the same and got there best time that way.

 

[Matt D]

well its a bullitt and it pulls rite to 6500 if it werent the winter i would try a day at the track shifting lower to see if that would make any difference but oh well its going to be a long boring winter......

Your wasting time pulling it to 6500, stock cams usually stop making power around 6200

 

[08Bullitt2291]

Thanks really would like to see what the car could do with the stock cams.. but i already have an appointment at jpc to get Frpp cams in january so i guess ill never know what it would have done with the stock cams..

 

[Matt D]

Thanks really would like to see what the car could do with the stock cams.. but i already have an appointment at jpc to get Frpp cams in january so i guess ill never know what it would have done with the stock cams..

Nice lol, upgrading is always a plus. Im sticking with these godam stock cams till I run 11.8s

 

[08Bullitt2291]

I sure that it will happen i have seen a all stock cams to bottem end run a 11.7.... Just have to get that car on a diet. How did you get your hands on the ford racing manifold i want one BADD!! thats sick..

 

[Matt D]

I sure that it will happen i have seen a all stock cams to bottem end run a 11.7.... Just have to get that car on a diet. How did you get your hands on the ford racing manifold i want one BADD!! thats sick..

Long story about the manifold They will be out in March

 

[08Bullitt2291]

I will be buying one.. how much hp did you gain by changing?