Update(just Spent Some Money)dyno Sheet

[N8Dogg98]

No disrespect intended, but 300 RWHP on a dynojet with STD correction isn't all that impressive. It's too bad tuner shops don't standardize dyno numbers... I see this all the time and it seems like shops sometimes try to "pad the numbers" by running the correction factor that provides the best numbers so you'll go brag to your buddies about how XYZ tuner got 300 RWHP out of my car.

For example, my little cammed NPI 2v was tuned on a Dyno Dynamics unit (which runs 12% lower than a DynoJet) and had the SAE correction factor applied (reads approximately 4% lower than STD). My car laid down a pathetic 237 RWHP number and had it been run on a DynoJet with STD correction factor it likely would have been around 270-275RWHP. The point is regardless of whether it is 237 RWHP or 275 RWHP, the dyno read out is nothing more than a meaningless number unless you have some track times to back it up.

Another example is a guy in my car club who has a built 2V, forged short block, TFS heads, Bullitt manifold, and stage 2 cams and he put down 268 RWHP and 286 RWTQ through an auto (flatlines at 4700 d/t stock iron manifolds). Again, had the car been on a DynoJet and had the tuner used STD correction instead of SAE it would have been well into the low 300 RWHP and there is no way a stock headed 2V PI car puts down comparable numbers to a 2V car with the TFS top end kit.

Seems like people have, and clearly continue, to inflate 2V dyno numbers.

 

[TylerByers18]

None taken, im just a guy who put some stuff on his car and got it tuned, so then i got 270 hp which is still a 50hp increase and it sounds good which is really all a mustang like mine is good for. I still probably cant beat an ls1 so what ev.

 

[N8Dogg98]

You'd be suprised, the LS guys inflate their numbers just as much as the 2V guys. The big advantage with the Mustang is it's weight, suspension set up, and quick revving V-8. Stoplight to stoplight and perhaps even 1/8th mile, you'll be able to take on many cars that have much more powerful engines. I've put the hurt on a 300 SRT-8, an LS1 Camaro, and a SN95 Cobra and your car is definitely making more power than mine (although I have a significant advantage in the torque department under 4K rpms).

 

[TylerByers18]

I dunno man it is what it is, all I got is the numbers and the sound, i dont go to the track much like i said. but we will see one day when i race someone

 

[StanglovR1]

Even track times dont do much justice because so much is based on the driver. i went for the first time last week and ran a 14.5 which i thought was pretty good running only a CAI, 3.73 and super 40s... When i talked to some guys they were telling me i shud have been getting mid 13s. My biggest mistake was hitting redline instead of finding the power bands and shifting in those... lesson learned cant wait to go back!

 

[sneaky98gt]

N8Dogg98, I noticed the STD correction factor and the spike at the end of the pull (probably 10-15 hp worth), but I was just gonna be a nice guy and not point any of that out.

Completely agreed with you, though, on the "just a number" part. As I was saying earlier, I dynoed 335/338 on the wheels at the last dyno day I attended. One of my buddies who has a FULL bolt-on, cammed, nitrous '01 Bullitt made 420/499 on the same dyno at the same dyno day. One week earlier, we both went to the same drag strip for a test-n-tune. He only trapped 2 mph more than I did (his 120 mph to my 118), even though he has "85" more rwhp, 3.90 gears to my 3.27s, and 200 pounds less race weight. Our ETs were also only .2 seconds apart, mainly due to my 60' times being limited by the stock converter

Even track times dont do much justice because so much is based on the driver. i went for the first time last week and ran a 14.5 which i thought was pretty good running only a CAI, 3.73 and super 40s... When i talked to some guys they were telling me i shud have been getting mid 13s. My biggest mistake was hitting redline instead of finding the power bands and shifting in those... lesson learned cant wait to go back!

You're right, track times don't always do justice, but trap speeds (in conjunction with a density altitude) give a pretty decent idea. For example, you go out to the track, trap 101 mph. This weekend, you put long tubes on. You go back to the track, record the DA is about the same as last weekend, and trap 103 mph. It's then pretty safe to say that you picked up a good, solid 20 rwhp.