| Author | Message | ||
| Mitch Alsup (Mitch_alsup)
Member Username: Mitch_alsup Post Number: 948 Registered: 4-2002 |
"every dyno of a car w/ a dual runner manifold set-up has a similar graph." And this one seems to come on later than designed. | ||
| Hubert Otlik (Hugh)
Intermediate Member Username: Hugh Post Number: 1223 Registered: 1-2002 |
Does the 550 have secondary buttefly valves in the intake? If so, that would explain the drop in tq, and jump in hp at 6500;every dyno of a car w/ a dual runner manifold set-up has a similar graph. | ||
| Andy Falsetta (Tuttebenne)
Junior Member Username: Tuttebenne Post Number: 228 Registered: 3-2003 |
Did the motor stop at 5700 RPM on the second pull or did the dyno go to sleep? | ||
| Mister Jones (Davey_jones)
Junior Member Username: Davey_jones Post Number: 88 Registered: 9-2002 |
I'll have to re-read that again.... | ||
| Bart Duesler (The_bart)
Member Username: The_bart Post Number: 270 Registered: 1-2003 |
Say what? | ||
| Mitch Alsup (Mitch_alsup)
Member Username: Mitch_alsup Post Number: 945 Registered: 4-2002 |
From the shape of the TQ curve, this looks like a 550 engine. I think this shows an anomoly with the variable intake resonance system. The Tq after 5500 drops faster than expected, then at 6500 it catches back up. | ||
| PeterS (Peters)
Intermediate Member Username: Peters Post Number: 1280 Registered: 1-2003 |
OOOOOOOOH Nooooo!! This smells like another 'tell me about driving around at high RPM' thread  | ||
| Vince (Manatee)
Member Username: Manatee Post Number: 307 Registered: 6-2002 |
The dyno couldn't handle those high values, and had a coronary. Seriously, when driving the car do you notice anything odd happening around 6500 ? | ||
| Dr. Erik Nielsen (Judge4re)
Junior Member Username: Judge4re Post Number: 154 Registered: 4-2003 |
I've never taken one of these apart, but it could be the variable intake opening fully. If you had the exhaust gas curves, I could tell you definitively. After all, that's the side of the lump that I earn my living on. | ||
| Jeff Green (Carguy)
Member Username: Carguy Post Number: 425 Registered: 10-2002 |
Hmmmmmm....might be some engine management induced spike? Can't imagine it being something physical. That is some serious horsepower there! Very good numbers! | ||
| Bart Duesler (The_bart)
Member Username: The_bart Post Number: 268 Registered: 1-2003 |
This is another try to upload the results of a dyno test on my car.  What is the spike at 6500 rpm? |