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Well that's embarassing

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SpannerMonkey
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PostPosted: 14:09 - 28 Feb 2011    Post subject: Well that's embarassing Reply with quote
A good mate of mine has just finished fine tuning his lil scoot and I advised he go for a dyno run for a laugh... He said it would make about 30bhp bearing in mind it's only around 94cc now and my GN250 makes 21...
Now I did expect it to push a fair bit of power for a scoot but he shown me the results and from what I can see his peak HP at 15,000ish rpm is 25bhp...
Okay, granted, he's spent the best part of 2 grand on the lil thing in parts but fucking hell =/ it comes to something when I'm actually being left by a piaggio zip on the motorway.

I'll have the last laugh cause he'll probably have to rebuild it again in 2 weeks
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Snorty
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PostPosted: 14:12 - 28 Feb 2011    Post subject: Reply with quote
Why would you waste 2 grand tuning a scooter? For what he paid to tune and buy it he could have an NSR with money left over... lol.
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SpannerMonkey
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PostPosted: 14:15 - 28 Feb 2011    Post subject: Reply with quote
snorty wrote:
Why would you waste 2 grand tuning a scooter? For what he paid to tune and buy it he could have an NSR with money left over... lol.

I've said that to him lots. Granted, I want to tune a lil scoot myself, his bike is why I want to... but not to that point.
Every time I say why dont you spend the money and get somethin bigger he just comes out with "they dont look nice"
Considering his scoot is ugly as feck yet he thinks it's amazing.
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bacon
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PostPosted: 14:17 - 28 Feb 2011    Post subject: Re: Well that's embarassing Reply with quote
spannermonkey91 wrote:

I'll have the last laugh cause he'll probably have to rebuild it again in 2 weeks


you already have the last laugh, he rides a scooter
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SpannerMonkey
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PostPosted: 14:20 - 28 Feb 2011    Post subject: Re: Well that's embarassing Reply with quote
bacon wrote:
spannermonkey91 wrote:

I'll have the last laugh cause he'll probably have to rebuild it again in 2 weeks


you already have the last laugh, he rides a scooter

Hahah! It's so tiny! when he goes on the motorway he looks like a flea
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Pete.
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PostPosted: 14:21 - 28 Feb 2011    Post subject: Reply with quote
£2k for tuning parts on a 100cc scooter?

Each to his own I suppose but I know where there's a 'busa advertised for £2600 with no takers as yet.
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SpannerMonkey
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PostPosted: 14:27 - 28 Feb 2011    Post subject: Reply with quote
Pete. wrote:
£2k for tuning parts on a 100cc scooter?

Each to his own I suppose but I know where there's a 'busa advertised for £2600 with no takers as yet.

It wasnt a 100 as standard, it was a 50... something about a polini kit on it
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Rogerborg
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PostPosted: 14:41 - 28 Feb 2011    Post subject: Reply with quote
25bhp at the rear wheel, or estimated at the crank?

Dynos have to use voodoomaths to estimate crank power, and it's only ever that - an estimate. It'd be very easy to get the calculation laughably wrong with a belt driven scooter.
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MinhDinh
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PostPosted: 14:54 - 28 Feb 2011    Post subject: Reply with quote
I was chatting to someone on Youtube and they said that BHP is usually higher than what is stated because if a Ram Air or something? This was for cars though.

Anything like that for bikes? Or is a Dyno pretty much accurate?
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MarJay
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PostPosted: 15:07 - 28 Feb 2011    Post subject: Reply with quote
MinhDinh wrote:
I was chatting to someone on Youtube and they said that BHP is usually higher than what is stated because if a Ram Air or something? This was for cars though.

Anything like that for bikes? Or is a Dyno pretty much accurate?


Yes on bikes with ram air systems, but most modern dynos have a fan that simulates ram air anyway, so he's sort of talking nonsense.
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rac3r
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PostPosted: 15:09 - 28 Feb 2011    Post subject: Reply with quote
MinhDinh wrote:
I was chatting to someone on Youtube and they said that BHP is usually higher than what is stated because if a Ram Air or something? This was for cars though.

Anything like that for bikes? Or is a Dyno pretty much accurate?


It is slightly true yeah, Kawasaki state 2 power figures for the ZX10R one with ram air and one without

Dammit Marjay!
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0ddball
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PostPosted: 15:10 - 28 Feb 2011    Post subject: Reply with quote
For 2 grand i'd want something a bit special like a 500 2T crammed under the seat.
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MinhDinh
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PostPosted: 15:34 - 28 Feb 2011    Post subject: Reply with quote
Bah wish I knew that. Some reason every bike or car race video on Youtube ends up in arguments for me LoL.
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RichieZX6R
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PostPosted: 16:08 - 28 Feb 2011    Post subject: Reply with quote
Given the choice i would have done my test AND bought a cheapish bike for £2k but each to there own i guess.
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bacon
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PostPosted: 16:22 - 28 Feb 2011    Post subject: Reply with quote
MarJay wrote:
MinhDinh wrote:
I was chatting to someone on Youtube and they said that BHP is usually higher than what is stated because if a Ram Air or something? This was for cars though.

Anything like that for bikes? Or is a Dyno pretty much accurate?


Yes on bikes with ram air systems, but most modern dynos have a fan that simulates ram air anyway, so he's sort of talking nonsense.


Not exactly, I highly doubt a fan on a dyno can simulate the ram air forces when a bike is doing 150mph+, that would require an air tunnel?

So he is kind of correct, though dynos do at least try and simulate it, I doubt its going to be anything like the real thing.
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MarJay
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PostPosted: 16:30 - 28 Feb 2011    Post subject: Reply with quote
bacon wrote:
[Not exactly, I highly doubt a fan on a dyno can simulate the ram air forces when a bike is doing 150mph+, that would require an air tunnel?

So he is kind of correct, though dynos do at least try and simulate it, I doubt its going to be anything like the real thing.


No but they have a tube with a powerful fan in it that directs air ONLY to the ram air intake, and so I'd guess you don't need a wind tunnel to add the few PSI of air pressure you require.
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evoboy
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PostPosted: 16:50 - 28 Feb 2011    Post subject: Reply with quote
MinhDinh wrote:
I was chatting to someone on Youtube...


Fail.
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P.addy
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PostPosted: 16:56 - 28 Feb 2011    Post subject: Re: Well that's embarassing Reply with quote
spannermonkey91 wrote:
94cc and 25bhp...


Impossible? Thats either some really epic ped, or some total b/s..
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Pete.
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PostPosted: 17:11 - 28 Feb 2011    Post subject: Reply with quote
MarJay wrote:
bacon wrote:
[Not exactly, I highly doubt a fan on a dyno can simulate the ram air forces when a bike is doing 150mph+, that would require an air tunnel?

So he is kind of correct, though dynos do at least try and simulate it, I doubt its going to be anything like the real thing.


No but they have a tube with a powerful fan in it that directs air ONLY to the ram air intake, and so I'd guess you don't need a wind tunnel to add the few PSI of air pressure you require.


Ram-air itself doesn't even produce 1psi of air flat out on a fast bike.
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D O G
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PostPosted: 17:17 - 28 Feb 2011    Post subject: Reply with quote
Rogerborg wrote:
It'd be very easy to get the calculation laughably wrong with a belt driven scooter.


How so?
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27cows
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PostPosted: 17:21 - 28 Feb 2011    Post subject: Reply with quote
Perfectly feasible. Self and a mate did the full bollocks on a DT125LC and that produced a genuine 34bhp. OK, it did go bang in a particularly spectacular manner eventually, but it was brilliant fun while it lasted. Left everything for dead away from the lights, more or less Laughing
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P.addy
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PostPosted: 17:30 - 28 Feb 2011    Post subject: Reply with quote
27cows wrote:
Perfectly feasible. Self and a mate did the full bollocks on a DT125LC and that produced a genuine 34bhp. OK, it did go bang in a particularly spectacular manner eventually, but it was brilliant fun while it lasted. Left everything for dead away from the lights, more or less Laughing


But its a 125cc purposely restricted machine... that has been de restricted, much like the RS im riding, stock it 14 ish, but apparently goes to around 28-33 depending on how honest you are Laughing
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27cows
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PostPosted: 17:54 - 28 Feb 2011    Post subject: Reply with quote
##Paddy## wrote:
27cows wrote:
Perfectly feasible. Self and a mate did the full bollocks on a DT125LC and that produced a genuine 34bhp. OK, it did go bang in a particularly spectacular manner eventually, but it was brilliant fun while it lasted. Left everything for dead away from the lights, more or less Laughing


But its a 125cc purposely restricted machine... that has been de restricted, much like the RS im riding, stock it 14 ish, but apparently goes to around 28-33 depending on how honest you are Laughing


The DT had about 20 or 21 genuine horses derestricted. We then tuned it to complete (and ultimately destructive) buggery Laughing I knew we needed a titanium rod - but sadly getting one made would have cost about the same as a (then) brand new DT Laughing
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SpannerMonkey
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PostPosted: 20:31 - 28 Feb 2011    Post subject: Reply with quote
This is the list of mods he said he has on the engine
Polini Big Evolution 94cc cylinder kit
Digital ignition
94cc Big Evolution exhaust
28mm Dellorto carburettor
Both gear kits
Big Evolution conical air filter
Big Evolution long stroke crankshaft
Vulcanized reed valve
360 degrees inlet manifold
9 roller variator kit
Evo Slider and compression spring
Polini Torque driver
Kevlar belt
Evolution 3 2G clutch
Evolution 2 clutch bell
Aluminium water pump kit
Evolution crank bearings
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Slacker24seve...
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PostPosted: 20:43 - 28 Feb 2011    Post subject: Reply with quote
spannermonkey91 wrote:
This is the list of mods he said he has on the engine
Polini Big Evolution 94cc cylinder kit
Digital ignition
94cc Big Evolution exhaust
28mm Dellorto carburettor
Both gear kits
Big Evolution conical air filter
Big Evolution long stroke crankshaft
Vulcanized reed valve
360 degrees inlet manifold
9 roller variator kit
Evo Slider and compression spring
Polini Torque driver
Kevlar belt
Evolution 3 2G clutch
Evolution 2 clutch bell
Aluminium water pump kit
Evolution crank bearings


Still gay.

Can I just ask one thing though; why does your sig say you want a Gilera when you have an A2 license?
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