Anti lag.....
21-02-2007, 10:55 AM
#81
The way I would test it is to rev the car to 6000rpm in third gear, come OFF the throttle allowing the revs / rollers to slow the car down to 5000rpm. As soon as it hit 5000rpm, step on the throttle again and rev to 6000rpm - repeat with ALS on. Then using the T6 or Pectel monitor data-logging, check the time that it took to get from 5000 to 6000 on each run. In theory the run with the ALS on should take a shorter time, as the ALS would have kept the turbo spooling off throttle, whereas with it turned off, you would just be relying on the exhaust gasses to spool the turbo back up.
21-02-2007, 11:43 AM
#84
Originally Posted by Mike Rainbird
Originally Posted by GARETH T
mike if you want to run through the gears on full throttle on a dyno,, you do a normal gearchange which means the throttle WILL go below 4% 
. Have you EVER seen a CAR rolling road operater accelerate full throttle through the gears? 
NO, thought not 
.So EVEN if you could persaude someone to do that (and risk launching the car off the rollers
), all you would notice is less of a drop off in bewteen the shift "dips" on the graph. Nothing more than that 
.
21-02-2007, 08:18 PM
#85
DEYTUKURJERBS
Originally Posted by big_wig_074
Originally Posted by Mike Rainbird
Originally Posted by GARETH T
mike if you want to run through the gears on full throttle on a dyno,, you do a normal gearchange which means the throttle WILL go below 4%
. Have you EVER seen a CAR rolling road operater accelerate full throttle through the gears? NO, thought not .So EVEN if you could persaude someone to do that (and risk launching the car off the rollers
), all you would notice is less of a drop off in bewteen the shift "dips" on the graph. Nothing more than that . unlucky mike i was gonna dig out that vid but forgot.
harvey gibbs obv didnt tell mike about mustang dynos and the fact they safe to launch the car and drive it as hard as poss on there
22-02-2007, 06:46 AM
#86
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Originally Posted by Mike Rainbird
I meant full throttle being used in the lower gears you numpty . Have you EVER seen a CAR rolling road operater accelerate full throttle through the gears? NO, thought not .
. Have you EVER seen a CAR rolling road operater accelerate full throttle through the gears? NO, thought not .For Mike Rainbird
22-02-2007, 07:33 AM
#87
I wouldn't even know where to find a dyno like that in the UK, although I am sure there must be a few?
Most seem to be the twin roller type, which would mean that the car would climb out of the rollers if that was attempted.
Mega
video, but you can hear the wheel-spin, so would not give any accurate print out in the lower gears .
Skylines sound awesome at high revs
.
Most seem to be the twin roller type, which would mean that the car would climb out of the rollers if that was attempted
.Mega
video, but you can hear the wheel-spin, so would not give any accurate print out in the lower gears .Skylines sound awesome at high revs
.
22-02-2007, 08:07 AM
#89
Originally Posted by Doug Stirling
What about Dynapak (HUB dyno's), woud they not enable the comparative ALS test that we are after?
However, I keep telling you that there will be no difference in the boost curve (threshold) therefore POWER curve, other than less of a drop off between the gears and a faster re-spool ONCE INSIDE THE BOOST THRESHOLD! Which part of that don't you understand
.
22-02-2007, 08:12 AM
#90
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Originally Posted by Mike Rainbird
However, I keep telling you that there will be no difference in the boost curve (threshold) therefore POWER curve, other than less of a drop off between the gears and a faster re-spool ONCE INSIDE THE BOOST THRESHOLD! Which part of that don't you understand .
.
22-02-2007, 08:23 AM
#91
Originally Posted by Doug Stirling
Originally Posted by Mike Rainbird
However, I keep telling you that there will be no difference in the boost curve (threshold) therefore POWER curve, other than less of a drop off between the gears and a faster re-spool ONCE INSIDE THE BOOST THRESHOLD! Which part of that don't you understand .
. 
.
22-02-2007, 08:35 AM
#92
Originally Posted by big_wig_074
Originally Posted by Mike Rainbird
Originally Posted by GARETH T
mike if you want to run through the gears on full throttle on a dyno,, you do a normal gearchange which means the throttle WILL go below 4%
. Have you EVER seen a CAR rolling road operater accelerate full throttle through the gears? NO, thought not .So EVEN if you could persaude someone to do that (and risk launching the car off the rollers
), all you would notice is less of a drop off in bewteen the shift "dips" on the graph. Nothing more than that .
22-02-2007, 09:03 AM
#93
Originally Posted by Mike Rainbird
I wouldn't even know where to find a dyno like that in the UK, although I am sure there must be a few?
they use a 4 foot roller for each axle to give maximum contact patch and simulate a normal road as best as poss, and they both rotate at the same time, hence the wheelspin i guess as the rear would have more torque bias on the launch
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