GT6M Posted April 30, 2016 Report Share Posted April 30, 2016 meb,e of some intrest to some TR6 Dyno charts M Quote Link to post Share on other sites
Motorsport Mickey Posted April 30, 2016 Report Share Posted April 30, 2016 (edited) Good Stuff. Now for those who aren't used to reviewing power and torque run information, just a few clues of easy appraisal which I've used over the last 40 years to appraise engines and help establish when the red strobe behind your eyes should start to flash. Because the correlation between power and torque is established by formulae, ie they measure the torque and then calculate the hp from that, means the crossing of the appropriate hp and torque figures from each individual run should happen at 5250 revs or thereabouts (allowing for reading squiggling lines on graphs). (Plenty of info on this on the internet, try some Googling for background info). If the runs don't cross there compare the scales on the left and then the right of the scale, they should be the same, if they aren't then you have to adjust the line which has been scaled up to read the same scale as the other otherwise the curve of the torque will be quite different, if you do then the crossing point from hp and torque should then restablish itself at the fabled 5252 revs area. There are different reasons Dyno or Rolling road firms give as to why they adjust the scales to be different, sometimes they say it's to highlight differences in the comparison between hp and torque. Sometimes I've even seen when the scales are the same magnitude and the power and torque figures do not cross at 5250 revs, I'm a simple man, it worries me. Mick Richards Edited April 30, 2016 by Motorsport Mickey Quote Link to post Share on other sites
TriumphV8 Posted April 30, 2016 Report Share Posted April 30, 2016 Nice link, lots of Charts, many thanks Quote Link to post Share on other sites
Peter Cobbold Posted April 30, 2016 Report Share Posted April 30, 2016 Thanks Markus. Moss supercharger kit on this 6: http://www.6-pack.org/j15/index.php/articles/37/410 Intercooled supercharger and injection: http://www.6-pack.org/j15/index.php/articles/37/334 Supercharged, no details:http://www.6-pack.org/j15/index.php/articles/37/330 Quote Link to post Share on other sites
GT6M Posted April 30, 2016 Author Report Share Posted April 30, 2016 Thowt ye be intrested in the Supercharger,ns Peter. think that the ones no showing are in PDF form, gotta log in to see!! Mik, I noticed that, quite a few are miles off, like 2000rpms off. M Quote Link to post Share on other sites
Motorsport Mickey Posted April 30, 2016 Report Share Posted April 30, 2016 Must admit I've never seen a supercharged Dyno sheet at all so I can't express an honest opinion on those. There are at least a couple of examples on those other Dyno sheets where the scale on the left side is different from that on the right side which obviously moves the intersection point (it's working off a different grid index), and of course it skews the shape of the curves so something to beware of. Mick Richards Quote Link to post Share on other sites
Peter Cobbold Posted April 30, 2016 Report Share Posted April 30, 2016 Also we dont know which records are reporting rear wheel hp or flywheel hp ( ie corrected for notional transmission losses). Peter Quote Link to post Share on other sites
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