Pete_vxl
Member
Registered: 24th Nov 06
Location: Lochgelly, Fife
User status: Offline
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just wondering what 1.6's have got at the wheels slightly modified. mine made 90.5 at the wheels and want to know if this is common or just plain shit. it made 128 at the fly so has lost 38 brake, how can i try and re-coop some of the power?
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mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
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you cant recoup power lost through the transmision?
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Pete_vxl
Member
Registered: 24th Nov 06
Location: Lochgelly, Fife
User status: Offline
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so every corsa loses 30 odd brake? how is it lost through the gearbox
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mattk
Member
Registered: 27th Feb 06
Location: St. Helens
User status: Offline
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the crank makes 128bhp, then that power is transfered to the wheels Via the flywheel the gearbox the diff and the shafts and by the time it gets to the wheels some has been lost
the dyno machine measures the wheel horsepower then by letting it run down it converts the mechanical drag into the extra power at the crank
I think 30bhp is about right
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tom_simes
Show Staff
Organiser: South Wales
Premium Member
Registered: 12th Jan 05
Location: Undy, Newport Drives: Skoda Octavia vRS estate
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I agree with Matt, and it normally doesn't work on a certain bhp, such as 30 bhp, but rather as a percentage.
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Hamish
Member
Registered: 4th Apr 05
Location: Ashtead, Surrey Drives: 100bhp Mint with Hole
User status: Offline
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quote:
Originally posted by mattk
you cant recoup power lost through the transmision?
true. No machine is 100% efficient. therefore you get losses
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dangsi
Member
Registered: 9th Oct 08
Location: Berkshire Drives: lexus gs300/ vauxhall corsa b
User status: Offline
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my cars only done 20.000 mileson a rebuild so should be ok ithink will get dynod soon see wat i puts out
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Daimo B
Member
Registered: 20th Mar 00
User status: Offline
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My ol 1.4 16v lost 24.8bhp through transmission.
Was well cheesed off, it mean I was putting a huge 65bhp odd on the road.....
Aweseome..... 
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
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Simon_16v
Member
Registered: 14th Aug 06
Location: Yorkshire
User status: Offline
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quote:
Originally posted by Ojc
Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
1.4 16v?
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Eck
Premium Member
Registered: 17th Apr 06
Location: Lundin Links, Fife
User status: Offline
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quote:
Originally posted by Simon_16v
quote:
Originally posted by Ojc
Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
1.4 16v?
Nae, 1.6. But that's a good figure!
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Ste L
Member
Registered: 3rd Jul 06
Location: Manchester Drives: 106 16v Rallye
User status: Offline
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never acctually thought about this, but my 1.2 run around prob only put's out 20-25 to the road
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Corsa_Sport21
Member
Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
User status: Offline
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What was your torque figure Pete??
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smcGSI16V
Member
Registered: 26th May 03
Location: Farnborough Drives: Thurlby 888 CDTi No.98
User status: Offline
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quote:
Originally posted by Ojc
Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
Exactly the same as mine, with 117ft/lb torque.
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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116 lb/ft on mine 
Awesome 
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K2NY-G
Member
Registered: 6th Feb 08
Location: Fife, Scotland
User status: Offline
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quote:
Originally posted by smcGSI16V
quote:
Originally posted by Ojc
Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
Exactly the same as mine, with 117ft/lb torque.
where they the same inlets?
[Edited on 21-11-2008 by K2NY-G]
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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quote:
Originally posted by mattk
the dyno machine measures the wheel horsepower then by letting it run down it converts the mechanical drag into the extra power at the crank
not all dyno's calculate the losses by allowing the car to run down naturally, dyno dynamics dont, nor do mustang.
maha do.
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Ojc
Member
Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
User status: Offline
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quote:
Originally posted by K2NY-G
quote:
Originally posted by smcGSI16V
quote:
Originally posted by Ojc
Mine made 95bhp at the wheels, 120.2bhp at the fly, that's just with an inlet.
Exactly the same as mine, with 117ft/lb torque.
where they the same inlets?
[Edited on 21-11-2008 by K2NY-G]
SMC is a Mantzel, mine is a Lee Mitchell special.
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Pete_vxl
Member
Registered: 24th Nov 06
Location: Lochgelly, Fife
User status: Offline
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ive forgot my torque, will look it out after work.
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20valver
Banned
Registered: 14th Sep 08
User status: Offline
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you lose up to 20 bhp on front wheel drive cars and up to 40 bhp on rear wheel drive cars
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elliott023
Member
Registered: 1st Jun 08
Location: Bradford (West Yorkshire)
User status: Offline
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whys that??
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philip2
Member
Registered: 1st Oct 06
Location: n.wales/chester
User status: Offline
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flywheel figures are worthless anyway. tyre pressures can affect what power it makes at the wheels, alsorts of little things can also affect the reading.
all you need to know is the power at the wheels, no-one can actually give an accurate flywheel figure if calculating from the wheels. only genuine way to get a fly figure is an engine dyno!
flywheel figures just sound more impressive, your motor is about right
whys that? - because fwd as said you have flywheel/gerabox, dif, shafts, wheels.
rwd you have the above including prop shaft.
[Edited on 21-11-2008 by philip2]
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20valver
Banned
Registered: 14th Sep 08
User status: Offline
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or a dyno pack
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av it
Member
Registered: 4th Mar 08
User status: Offline
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quote:
Originally posted by 20valver
or a dyno pack
or airbox 
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20valver
Banned
Registered: 14th Sep 08
User status: Offline
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a dyno pac dyno couples straight to the drive shaft flanges instead of the wheels turning the drums for the reading
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