New Dyno Numbers for the Cobra
Thread Starter
OUCH!!!
Joined: Mar 2002
Posts: 3,441
Likes: 0
New Dyno Numbers for the Cobra
Just got new dyno numbers.
The red numbers are basicly stock (K&N, cut intake silencer)
The blue numbers are new (Bassani X Pipe, Steeda Pullies, Steeda Timing Adjuster (16* total advance, C&L MAF).
The red numbers are basicly stock (K&N, cut intake silencer)
The blue numbers are new (Bassani X Pipe, Steeda Pullies, Steeda Timing Adjuster (16* total advance, C&L MAF).
So stop shifting beyond that, you are just losing time.
Need To Get Quicker
Joined: Dec 2001
Posts: 894
Likes: 0
From the looks of the dyno sheet, I would shift around 6500-6600. A few hundred RPM's past peak usually works best.
Thread Starter
OUCH!!!
Joined: Mar 2002
Posts: 3,441
Likes: 0
with a taller rearend gear, it's even more critical that I stay as far in the powerband as I can as shorter rearend gears hide the lack of power somewhat.
Going by gear ratio's in the T-3650 as follows:
1st: 3.37
2nd: 1.99
3rd: 1.33
4th: 1.00
5th: 0.67
and shifting at redling (6800RPM ~270hp), I wind up with the following results:
Gear Resulting RPM/Power
1->2 4015 (210hp)
2->3 4500 (250hp)
3->4 5112 (285hp)
4->5 doesn't really matter
here's the equation:
(next gear ratio/current gear ratio) * current RPM = resulting RPM
So, with the exception of 3->4, shifting higher helps keep my resulting RPM in the gear higher which keeps me further into the power band. 3->4, I could probably stand to shift a little bit short at around 6600 (a whopping 200 rpm) and keep my power at or above 280 for the entire gear.
Anyhow, my point is that even though I'm not making an increasing amount of power over 6000 RPM, in lower gears, I have more power available by shifting as late as I can (3->4 excluded).
Going by gear ratio's in the T-3650 as follows:
1st: 3.37
2nd: 1.99
3rd: 1.33
4th: 1.00
5th: 0.67
and shifting at redling (6800RPM ~270hp), I wind up with the following results:
Gear Resulting RPM/Power
1->2 4015 (210hp)
2->3 4500 (250hp)
3->4 5112 (285hp)
4->5 doesn't really matter
here's the equation:
(next gear ratio/current gear ratio) * current RPM = resulting RPM
So, with the exception of 3->4, shifting higher helps keep my resulting RPM in the gear higher which keeps me further into the power band. 3->4, I could probably stand to shift a little bit short at around 6600 (a whopping 200 rpm) and keep my power at or above 280 for the entire gear.
Anyhow, my point is that even though I'm not making an increasing amount of power over 6000 RPM, in lower gears, I have more power available by shifting as late as I can (3->4 excluded).
Guest
Posts: n/a
Numbers look good. Honestly a catback woln't net you more then a few ponies at the rear wheels. You'll pickup 5-6rwhp. You might want to try doing the IAT resitor mod to help lean you out a bit and you will pick up some noticable power and torque from that. These motors make the best power around 13.5:1 A/F ratio, any richer your torque falls off, go leaner and the HP numbers fall again.
Thread Starter
OUCH!!!
Joined: Mar 2002
Posts: 3,441
Likes: 0
I've got the FR500 catback on order from Fordman and am dying to get it. If the dyno results I've seen are anywhere near the actual performance, I'll be very happy (MMFF tested it for 15hp). Time will tell on that one.
As far as the IAT mod goes, I don't need to bother playing with that. I've got the steeda timing adjuster and can adjust timing at will. Right now, I'm running 16* total advance (6* over stock). I've been a little bit apprehensive about advancing it more until I saw my a/f curve.
I'm actually surprised that with the mods I got richer. I figured it would get leaner as it was able to breath better.
What kind of timing do you have set in your chip if you don't mind me asking?
As far as the IAT mod goes, I don't need to bother playing with that. I've got the steeda timing adjuster and can adjust timing at will. Right now, I'm running 16* total advance (6* over stock). I've been a little bit apprehensive about advancing it more until I saw my a/f curve.
I'm actually surprised that with the mods I got richer. I figured it would get leaner as it was able to breath better.
What kind of timing do you have set in your chip if you don't mind me asking?
