Quote:
Originally Posted by AL427SBF
Alarming that these expensive tight clearance well balanced builds can't take throttle at 2500 RPM. Road course guys must be walking on egg shells every time they exit the apex and roll it on to WOT @ 2800 
Off-idle RPM = 2500, interesting
2000 RPM = fast idle? |
I roll on it,actually stomp on it on road courses at 2500 rpms, this is about as low an rpm as I've seen in my car on 6 different tracks...the thing is there is some load on the engine at that point,not nearly the load a dyno puts on an engine, and I'm in 2cd or 3rd gear,so I have the transmission gearing to help accelerate the engine...
On the dyno,it would be the same as starting in 4th gear at whatever rpm you want the pull to start at...loading an engine at 1500 rpms in "4th"gear then standing on the throttle is not the best thing, especially an engine designed to make power in the upper rpm range,say from 3500 to 6500 rpms.
during my last dyno session, I watched the operator and the readout closely,he brought the engine up to 3500 rpms, with the throttle in one hand and the other hand on the keyboard,once the engine was at 3500 rpms, he loaded the engine and had to keep giving it more throttle to keep the rpms at 3500,once that settled,he went full throttle for the pull.......
I'm guessing once at 3500 rpms and the load was put on the engine, if he had not given it more throttle and just left it as it was, the load would have pulled the engine rpms down, the engine most likely would have killed....
I was surprised at how much more throttle he had to use just to keep the rpms at 3500 to begin the pull.........
But it's your engine , if you want them to load it at 1500 rpms, I'm sure once you sign a waiver, they'll be happy to do it for you and likely destroy it......
David
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