420whp/410wtq here with off road h, catback, and jlt ram air (no tune). My torque number is higher than most that I have seen.
Unpullied 04 Cobra puts down 429 rwhp (SAE)
- Thread starter mpe331lx
- Start date
501/464 with a Steg Stg IV and a 2.93 upper
Point of this thread is cars that are pretty much stock with stock pulley ;-)
wow...
I made a little over 400whp with an intake and exhaust and 430whp/405 tq with a tune in Va summer weather.
Added a 2.8 pulley and had 460/470 in hot weather again
Numbers in sig with a Stage IV and 2.76 and shutting it down at 4800 because we were running out of injectors
Added a 2.8 pulley and had 460/470 in hot weather again
Numbers in sig with a Stage IV and 2.76 and shutting it down at 4800 because we were running out of injectors
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I don't understand how the cars could vary so much. 340-395rwhp??? Are these just reported numbers from people from different dynos, with different DA's, air temps ect.?
We Dyno a bunch of these cars. We have sceen stock ones range from 360 to 400 plus....we just did a 03 with Flowmaster Cat Back only...and it put down 411!
Using the same dyno...have sceen them run back to back same day and very that much. We always say depends on who build the motor and how good of mood they were in! LOL!
Using the same dyno...have sceen them run back to back same day and very that much. We always say depends on who build the motor and how good of mood they were in! LOL!
The factory doesn't get/give rear wheel numbers on individual cars obviously. So, yes, the reported numbers are on various dynos (Dynojets). Dynos are not going to vary enough to make it a major factor in the differences. And air temp differences won't account for a 55rwhp swing. My one car gained roughly 9rwhp from a hot summer day to a cool fall day. I can, though, tell you that my friend and I used the same dyno with roughly the same outside air temps. Mine made 363rwhp stock and his made 393rwhp stock.
Add to the variables whether the dyno was calibrated recently, and what TYPE of dyno. The Mustang brand dyno typically seems to record lower numbers than the Dynojet. Some dynos require inputting a "loading" factor (vehicle weight?) which influences the computed output.
My numbers (428/395) were std., also.
The hp range seems drastically reduced when cars are tuned. It seems like once at least an upper/tune/cai/exhaust is applied the hp range is drastically reduced.
I Recently Bought My 03 And The Former Owner Told Me It Made 440 With 2.93 O/r X Cat Back And K&n. I Dont Know If It Had Been Tuned Or Not. . . . . . If Also Said He Had The Heads Ported After The Dyno. . . . . Im Not Sure About That
im curious if this 429rwhp SAE car will trap any higher than another identical modded cobra at the track on the same day. mine made 398rwhp SAE with catback/cai.
That is true. In just about every case I am aware of, once you get a custom tune the increase margin is narrowed between cars with similar options.
I have a theory that in the early years many were going on the dyno at 800 miles to 1200 miles. Not enough time to properly break in the motor. Others like myself waited 3 or 4 thousand miles and were rewarded with higher numbers (416/379 SAE with K&N and catback)
By the time they got around to the custom tunes most now had enough break in miles for the rings to seat properly and maybe for the computer to learn the parameters resulting in more uniform numbers.
That being said, manufacturing tolerances and other variables make every one unique.
By the time they got around to the custom tunes most now had enough break in miles for the rings to seat properly and maybe for the computer to learn the parameters resulting in more uniform numbers.
That being said, manufacturing tolerances and other variables make every one unique.
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