It's just how the dyno calculates the power. There is math formula involved and some science. There is just a shit load of twisting force going through the wheels before the engine speed catches up.Is it just me or is the torque curve weird? Starts starts dropping like a rock after 3500rpm.
Yep!Are you running on a stock intercooler?
Indeed! I too was grateful for the holding power of the WGA. But I give props to Torrie for this lay-down. He's been with me for awhile now, and providing almost instant turnarounds on tune files and tweaks. UT FTW!!The tune looks pretty strong otherwise - that is one impressive peak that holds up to about 5800-5900 RPM. It shows the characteristics of what a stronger waste gate can do.
Careful, that guy calls Mustangs a deathtrap!It's just how the dyno calculates the power. There is math formula involved and some science. There is just a shit load of twisting force going through the wheels before the engine speed catches up.
I was gonna say the same thing. Although I'm wondering if a nice IC upgrade wouldn't help level it out a little bit. If he's on stock hes probably not getting as much out of it as he could. Maybe not the case as we can't see any temps but kinda curious...that thing tanks like a brick after 3500.Is it just me or is the torque curve weird? Starts starts dropping like a rock after 3500rpm.
Its the graph, its because its not a good width, if you follow the RPMS. He is loosing torque however between 3600 and 4500 RPM and a significant amount like 15 to 20 lb-ft under the curve there, which makes the gains up to about 3250 moot, if it drops right after, there is almost a 40lb-ft drop from its peaks around 3250 (roughly 385lb-ft) to 3700 (350is lb-ft) that is a noticeable drop you can feel, like hitting a head wind on the highway. There is a dip in power around 3500 although not as pronounced. Loosing 80lb-ft between 3500 to 5000 drop like a stone is odd, you want that power to flow, seems spikey. Peak numbers are nice but he is not holding them long on the torque values, but the power is not bad other than that odd dip at 4600 for a brief moment. I would look into why your torque is dropping so quickly, it looks similar to a stock drop off.Is it just me or is the torque curve weird? Starts starts dropping like a rock after 3500rpm.
Its the graph, its because its not a good width, if you follow the RPMS. He is loosing torque however between 3600 and 4500 RPM and a significant amount like 15 to 20 lb-ft under the curve there, which makes the gains up to about 3250 moot, if it drops right after, there is almost a 40lb-ft drop from its peaks around 3250 (roughly 385lb-ft) to 3700 (350is lb-ft) that is a noticeable drop you can feel, like hitting a head wind on the highway. There is a dip in power around 3500 although not as pronounced.
My sample log is from a recent datalog on a 93 degree day, basic bolt ons, stock downpipe running meth (not alot small spray 250cc) and tune. I marked roughly close to 3200 as I could from the log. He is probably making similar power to my setup give or take 10 or 20 points (different dyno methods of calc) (just for comparing the curve from a log file)
It is odd his drops where it does, should not see that till after 5k if at all.
Nope I am knocking anyone or the numbers etc, just curious why the stock like drop in torque is coming from, it should not be that drastic between both runs. All I know is if there is enough heat and knock starts to occur I can see timing being pulled and torque drop, but his power kept rising with the exception of that dip, that is why I think its timing being pulled, or how the tuner has the torque management tuned. It could be a conservative thing. Not knowing the true numbers could be an issue too, 400 wheel torque is near the limit, and I am not sure the stock snail can safely make that, which leads me to believe the numbers may be skewed based on that dyno.
Here's a stretched version of his and it definitely looks a bit easier to read that way. But that drop from 3500-3750 is still extreme. You're talking a drop of 10-12%, that's definitely noticeable! That trend continues very heavily just like the stock tune. Which means you're out of your powerband SUPER quick, and then gonna drop power like crazy. I would definitely like to see this stretched out like you said till about 5k. Hell you aren't even gonna see that increase in first and second you'll be out of it so quickly! lol. If you drop the clutch at 2800-3000 it's all downhill pretty much from there lol!
Not trying to knock OP or Torrie(My old tuner), just wondering what is causing this dramatic slope, and as you said, see if timing is being pulled somewhere whether in the tune, or from temps etc. On mine when I had stock IC, by about half way through 3rd gear is FAR into the 100+ degrees. *IIRC I seen about 145* peak on stock IC.* That'll definitely see some timing pulled