Dynamometer Results & Comparisons - Those w/stock heads, stock bottom end, N/A, T-Rex user, please post dyno graph.
11-10-2004, 03:06 PM
Need graphs for references, info, etc. Thanks. :)
By the way, doesnt matter if your manual or auto., but prefer auto. Thanks.
I've only seen one graph and he was having valve float, all others I've only seen numbers for :(
11-10-2004, 04:46 PM
...and the TR web site has a reaaaly crummy graph that gives no idea of what the low-end power is.
Here you go. I guess it's obvious which run is NA. ;) For a full list of mods click the link in my sig.
11-11-2004, 08:27 AM
See, now everyone says that the Trex is "a pain to drive around town" or that "you need gears," but every graph I see has it making over 200 hp at 3000 rpm, which is way better than stock.
So what gives? Does the below 3000 RPM power just drop off the face of the earth or what?
11-11-2004, 08:30 AM
I saw Rodney's car on the dyno...
made 440ish RWHP and 390ish torque...
see if he'll chime in :)
11-11-2004, 08:34 AM
my below 4K rpm should be similar to stock-headed setups...at least it'll give an idea of the powerband to expect
11-11-2004, 12:18 PM
Fireball: From the graph, it looks like you peaked around 6200 rpms and carried it to about 6500 rpms. You shift at 7000 rpms for best results due to the drastic drop in between shifts. Since Im running a very efficient auto. (200-4R) and a converter with really good shift extension (Yank PT4400), would I need to shift as high as you to stay in the powerband? More than likely not, any idea where I would need to shift?
11-11-2004, 01:52 PM
I haven't redynoed since I retarded the cam 2*. I imagine the peaks occur ~200 rpm later. Picked up 1.4 mph. Im guessing a 15 RWHP gain due to torque curve shift.
as far as shift points...you need to try different ones and determine what your car likes best... Mine ETs best at 7K and recovers around 5200
11-11-2004, 02:43 PM
So when you retard a cam, it moves the powerband up, but when you advance a cam, it moves the powerband back? Why did you retard the cam in the first place? Why would you want to shift higher than it already needs to be? Why do you think you picked up torque when retarding the cam 2º?
11-11-2004, 02:57 PM
didn't pick up torque...picked up HP
HP = Torque x RPM / 5252 so if you make more torque over 5252 rpm...you make more hp ;)
11-11-2004, 03:26 PM
So why did you move it in the first place? Did you know you were going to see gains by retarding the cam?
11-11-2004, 03:54 PM
it was solely experimentation...
thought my setup peaked early...so I retarded it some...
11-11-2004, 05:17 PM
Any dyno graphs after the retarding?
11-11-2004, 05:42 PM
haven't had time yet...I was too busy preparing for the shootout :nod:
11-13-2004, 10:37 AM
i have my graph in front of me but my scanner isnt hooked up to my cpu :(
but at 3000 im making 160hp and 280tq by 3500 im up to 225hp 350tq so im guessing the 3000 reading may be a lil low from the initial hit on the dyno and at peak hp 6800 im makin 442.4rwhp and 347rwtq :D so i have 350rwtq from 3500-6800 basically, with a peak torque of almost 390 at 5000:eek2: