I need to know how to convert from power at the wheels to power on the flywheel.
I put a branch on my '96 2.0L GTI and a free flow along with a K&N filter and had it Dyno’d.
Standard was 88 at the flywheel I think now it’s pushing 80 at the wheels. I want to know the flywheel kw’s.
I have to google for that to be honest.
Phone the blokes with the dyno, they probably have a chart on the wall.
Never actually used a dyno.
I have a flattish bit of road where I bench test all my cars.
Dual carriageway from the lights to an expansion strip up the road and watch the speedo.
If its higher than last time, whatever I did was a success.
[QUOTE=MrTFWitt;370144]I have to google for that to be honest.
Phone the blokes with the dyno, they probably have a chart on the wall.
Never actually used a dyno.
I have a flattish bit of road where I bench test all my cars.
Dual carriageway from the lights to an expansion strip up the road and watch the speedo.
If its higher than last time, whatever I did was a success.[/QUOTE]
ROFL, brilliant.
Needs Bilko I think
But I’m sure it depends on how its dyno’d
Is your figures BHP or PS ?
were coastdown losses measured ?
what gear was your measurement taken in 5th ? 4th ? 3rd
And what’s then engine spec as I thought 2.0 GTI was 150 BHP so therefore I guestimate a flywheel power around 105-110BHP which erm seem odd.
A std Rule is for Front wheel drive… ((wheel power + 10 ) / 0.9) = flywheel
I think Juggy´s figures are Kilowatts rather than Bhp or PS
Just got to that conclusion :chuckle: a min a ago
I think same gen rules apply for rough calcs… He might have the 8v version as well so figures might make more sense now
80 at the wheels would give 108 bhp
So est 119 BHP at the fly (88-89Kw at the fly)
/edit… STD quoted BHP for the 8v is 115 BHP so make more sense now 
119-88 = 31BHP seems an awful lot to get from a K&N plus exhaust but guess it depends on how good/bad the OEM system was.
I only got an extra 8 BHP at the wheels from a similar mod on Mrs B’s MGF Trophy 160 and I calculate that 2 or 3 BHP of that was due to a cold air feed pipe. (The standard setup draws hot air from the engine bay :doh: )
Transmission losses are always an estimate. Best to get it RR’d before any mods, then you know what you’ve achieved. I’m told that different RRs also give slightly different results 
so use the same place each time.
His measurements was KW Balrog… I converted to HP to make sence of it all
so its more 88-80 KW not 119-88 BHP
Trans mission losses for cars over 100BHP can be said to be 17-20%
Rear wheel drive is maybe 19-23% and 4 wheel drive it jumps to 25-30+
depending on the vechicle many factors influence it so can be very variable.
Even to the point of how its strapped to the machine / wheel toe / tyre pressures etc etc effect readings anyway.
Even which gear used can effect the reading you’ll get a higher figure in 4th than your would 5th, I think the gear used should be the one closest to 1:1
The Gain seems consistant with the mods given his KW figures once you convert to HorsePower that Us Brits understand :chuckle:
:doh: :amstupid:
Yes 8 kW, 10.5 BHP sounds more like it.
OK, it’s dyno’d at kw’s. Standard was 88 at the flywheel now I have 100 or there abouts. It’s at the coast with 95 lead replacement fuel which isn’t as good as the old 97 leaded fuel but it’s not bad.
I reckon it’s pretty good for a 11 year old car with 243K km’s on the clock. Around 151K miles. Pretty average at 22K km’s per year when 24K is considered acceptable.
So at 243K km’s I’ve gained 12kw’s after 11 years… I’m very happy. I can buy a 20v Golf mkIV motor for R12000 and fit a Turbonetics T4 turbo and more than double the power rating with a better fuel management system and bigger injectors. One of the top tuners in Cape Town has a Golf mk1 running a mkIV 20v motor with heaps of mods pushing 450kw’s. He is the best in the business in Cape Town… Robbie Ferolli…
@ PMM, yes it is the 8v version. Apparently if I bolt the 16v head on I can make the motor bullet proof.
Guys, what do the tuners in your kneck of the woods think of the 1996 8v 2.0L GTI Exec. There have been 3 owners since new. Me and 2 others. Almost 250K kilometers and the motor doesn’t smoke. I’m very impressed.