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View Full Version : down at the dyno...


brucer
27-05-12, 01:32 PM
hey guys, had my red gte back on the dyno today with a few mates. was meant to be taking my blue on but hasnt been run in etc etc.

some of you may know i had it dyno'd a few months ago which made this printout.

http://i193.photobucket.com/albums/z24/bachilds1988/img004.jpg

92bhp and 88lb/ft, quite genuine read outs id say.

only major thing thats been changed is an enlarged throttle body (55mm to 59mm), it has had minute changes to ignition timing etc.

http://i193.photobucket.com/albums/z24/bachilds1988/img006.jpg

it made similar bhp of 92. but the torque is 30lb/ft more than what it was. other cars were similar up on torque figues so dont think thats quite right.

what you reckon?

bruce
gearbox90
27-05-12, 02:43 PM
Where did you take it in to be dyno`d bruce? Was it in the leominster area? I am from leominster aswell .Good numbers by the way.
Angus Closier
27-05-12, 06:01 PM
Thats a massive hike in torque from those mods. (which IMO would result in BHP top end increase anyway)

Don't sound right to me, my 1.4tdi is only 140lb/ft !

Don't take me for gospel though...
MK999
27-05-12, 07:10 PM
calibration is out by about 250RPM, I'd say they have an issue which is causing the dyno to over-read, and they're fixing it by knocking a % off the speed calibration.

If you look at the run down losses they're about 5-10bhp higher on your 2nd run, which is probably where their issue is.

edit: In fact for some reason they've changed their roller inertia setting between the 2 runs, which will be why it's all a bit skewed.
Stuart
28-05-12, 05:26 AM
Hotter ambient ;) they have their temp adjustment tables setup wrong to be happy rollers.
turbojolt
28-05-12, 07:28 AM
When I get my car back I want to take it to a rolling road, so were are the these elusive trusted 100% right rollers found lol
Stuart
28-05-12, 01:28 PM
Track and Road in Essex, and JAM's 2wd rollers (not been on the 4wd ones)

Thats IT end of story. There used to be 3 sets but Velos retired.
Oh and my ass dyno is pretty accurate to 800bhp.
brucer
28-05-12, 07:44 PM
mystery solved, the torque on my second one is NM and the first lb/ft. conversion of NM to lb/ft makes it 2lb/ft more. so in fairness accurate to the original run.
brucer
28-05-12, 07:46 PM
Where did you take it in to be dyno`d bruce? Was it in the leominster area? I am from leominster aswell .Good numbers by the way.

was at saxon motorsport in hereford, give them a call, they seem pretty good.

http://www.saxon-motorsport.co.uk/