DYNORUN ; How to calculate to flywheel HP ?

[franx]

Just had a run on a dyno here in the neighbourhood so the power was calculated from the frontwheels; how do you calculate this to flywheel HP ?

The graph shows ; Max. 160,4 hp , 193,19NM Torque. they were well impressed, and honestly so was i !! My car was imported and supposed to have come from Dieppe , do'nt know what has been done to the car all this time i've had it. Very lumpy idle but thats normal on a 16v ? Fastchip group N and ITG panel + K-tec Stealth exhaust + sportscat...

The best man told me that i should divide by 0.87 or so to find out the flywheel power. This gets me at 184.36 hp which could be but 222.05 NM torque !!??

Is this/could this be correct ?

I will try to scan the printout and post it up

 

[franx]

:clown: up we go

anybody ?

 

[Henry]

depends upon the accuracy of the @thewheels figure you've got and whatever transmission losses might be involved - 15% *might* be a reasonable assumption

 

[nath17t]

its normaly a 20-25% loss throw the trans

 

[franx]

its normaly a 20-25% loss throw the trans

that would get me at circa 200hp.... and a shitload of torque also !

They were saying because it's frontwheeldrive it loses 13% round+about .
anyone else care to comment ?

Oh and their Dyno should be pretty correct as they have two "supercar" racers with which they compete so they have to make sure it's spot on (their explanation btw)

 

[theduck]

I'd really want to know what mods had already been done if I was you. Thats very impressive figures no matter how you look at it.

 

[franx]

I'd really want to know what mods had already been done if I was you. Thats very impressive figures no matter how you look at it.

yep, been trying to contact the guy who sold me the car.. no answer :quiet:

I can remember he is , besides group N rally, really into politics. He was also watching a debate on tv when i went by and told me he was fascinated by these people/politics...(politicians always talk alot and meanwhile say nothing it think)

i guess i cannot expect honesty then he ?

I'm not having the cams done after having seen these nice figures; quite happy even if it turns out to be 185hp. A custom map would be a better idea.. see what Henk comes up with

Anyone for another opinion on the powerloss from flywheel to the wheels ??

 

[stan*]

are you sure those figures arent already calculated as flywheel figures? that would seam alot more realistic.

 

[Andyman]

Sounds like its already got uprated cams in it.

The mods youve listed wouldnt get even close to 160 @ the wheels

 

[ed_172_cup]

need to know the mech efficiency of the gearbox

 

[franx]

are you sure those figures arent already calculated as flywheel figures? that would seam alot more realistic.

Nonono , then there would be something wrong with the car now would'nt it , 160 hp !?
nope, def at the frontwheels !

 

[franx]

i'm such a computer expert....%$^%$%^*%
cant seem to get the picture up

 

[franx]

i just scanned the bloody thing , now it's in my documents and cannot get it in here

 

[Jay_clio]

www.photobucket.com uplode it on there, use the 4th link down when it has uploded(IMG CODE) and paste in here

 

[franx]

www.photobucket.com uplode it on there, use the 4th link down when it has uploded(IMG CODE) and paste in here

cheerio there friend ! Someone has pointed this out to me before but did'nt come around to it yet.

 

[stan*]

are you sure those figures arent already calculated as flywheel figures? that would seam alot more realistic.

Nonono , then there would be something wrong with the car now would'nt it , 160 hp !?
nope, def at the frontwheels !

most 172's make circa 160-165 bhp....

 

[stan*]

as for actual losses, I use 18%.

anything between 15-20% is "normal".

 

[franx]

Nonono , then there would be something wrong with the car now would'nt it , 160 hp !?
nope, def at the frontwheels !

most 172's make circa 160-165 bhp....

Yes i've read this.. But with the map, exhaust, and airintake it could'nt be that low

:evil: and ... almost nothing ever keeps up with me ! Golf VR6 last time could'nt keep up, not from standstill (any Cup would be quicker then) but we were going 60+ and i pulled away easily

 

[stan*]

on the same note, can it be that high?

 

[franx]

on the same note, can it be that high?

see your point

Will be doing another RR when in future going for a custom map by Fastchip, then all doubt will be gone..

Thing is, i do'nt know if the car has cams in there.. I kept asking the people there at the Dyno if this was correct ; they were laughing and told me not to worry... right after mine there was a Honda 2000 (?) on there and those readouts were also what could be expected of the car..