my "other" car's dyno

JoeyCrack · 02-27-2008, 05:37 PM

Just got done tuning the GTO yesterday and it put down pretty good #'s. I figure being car fans you can appreciate this check it out!

Old smart · 02-27-2008, 06:13 PM

Something doesn't look too good to me. At the left end of the scale, the upper trace is obviously torque (in Ft-Lbs), the lower trace is derived BHP. The whole profile is far too peaky to be useful unless you have a bazillion-speed transmission to put it effectively on the road. It is always best to have the torque curve build quickly and as high as practicable (it may not be the highest) and keep it consistant across a long useable RPM range. Your torque trace peaks and falls off far too quickly, and the BHP trace, at higher RPM, falls off precipitously. Who set up this engine??

Xanthus · 02-28-2008, 11:27 AM

Example

For those wondering that is in a 1976 Mini.

JoeyCrack · 02-28-2008, 12:27 PM

Quote:

Originally Posted by Xanthus

Example

For those wondering that is in a 1976 Mini.

that thing has to go pretty good with that kind of power in a light piece like that? Fun car I take it?

MarkB · 02-28-2008, 12:44 PM

Quote:

Originally Posted by Old smart

Something doesn't look too good to me. At the left end of the scale, the upper trace is obviously torque (in Ft-Lbs), the lower trace is derived BHP. The whole profile is far too peaky to be useful unless you have a bazillion-speed transmission to put it effectively on the road. It is always best to have the torque curve build quickly and as high as practicable (it may not be the highest) and keep it consistant across a long useable RPM range. Your torque trace peaks and falls off far too quickly, and the BHP trace, at higher RPM, falls off precipitously. Who set up this engine??

I don't think he'll have any problems with driveability/practicality. That torque curve may be sharp, but it starts at around 230 ft/lbs. He's not hurting for low end torque.