Dyno results

[Lou Girardin]

A bit of background first, I heard that the previous owner had modded the airbox. So when I gave it a service I discovered a 50mm hole in the top of the airbox and the snorkel had been removed. I put new filters in, buttoned it all up and it ran like a bag full of arseholes. A carb balance helped, but there was very poor response to the throttle. Those who are in the know at work said that a dynojet kit was needed, so it was duly bought and I waited till they could fit the bike in, which was today.
The baseline run showed 98 hp at the wheel and a horrendously lean air/fuel ratio, nearly 16 to 1 at full throttle. The power curve looked like it had been drawn by someone with Parkinsons. If I had done a track day I'd have been looking at a piston jigsaw.
With the airbox mods, even the Dynojet 100 jets were too small, so a set of 124's were fitted.
With everything set, it was back to the dyno.
110.9 hp at the wheel, with a nice smooth torque curve and considerably more midrange. Air/fuel was hovering around 13 to 1, with just a small rich spell at 6000rpm.
Acceleration to 260km/h on the dyno was a second quicker.
The ride home was a revelation, much smoother, instant response and a quick burst on the motorway saw silly figures far too quickly.
Much thanks to Gav at work, he really knows his stuff. A lot of the settings were educated guess work because of the non-standard set-up.
Dynojet kits and Power Commanders really are worth the cost when done properly.
Lou

[slob]

I assume you have a bandit 12? I've heard that they are one of the most tuneable bikes out there with heaps of potential! I'd imagine if you wanted to, you could get it to crank out 120hp :msn-wink:

[Sensei]

You should try putting factory Neddle's back in it will run even better . Spent hour's & hunderd's of dollars on a Dyno with my 93 GSXR1100 started at 130hp at the wheel finished with 158hp. Tryed a Stage 3 Dyna jet kit but found factory needle's where the best after alot of testing on the Dyno & road .Found that what looked good on the Dyno didn't work that great on the road as you just cann't get the same load or condition's as riding it . Good luck with getting more HP once you start it's hard to stop
SENSEI

[Yamahamaman]

Much thanks to Gav at work, he really knows his stuff.
Gavin@AMPS is a top mechanic :first: Trust him with my baby any day.

[Lou Girardin]

I've pretty much done my dash with modded vehicles, this one was inadvertant. I had a supercharged MX5 for 12 years, it went like a cut cat but you tend to waste too much time fettleing them.
I know I could do GSX-R cams and stuff, but I'd rather make it handle better.
I've now got Aprilia RSV power and more torque at half the cost, but it doesn't handle like one. Shock and fork internal upgrade is next.

[750Y]

glad you got a good result Lou, don't forget to put brakes on your shopping list too.
I have had a bike dyno tuned at amps & although it was smooth & gained almost 4hp across the range it was 10kmh slower at puke.

[vifferman]

You should try putting factory Neddle's back in it will run even better . Spent hour's & hunderd's of dollars on a Dyno with my 93 GSXR1100 started at 130hp at the wheel finished with 158hp. Tryed a Stage 3 Dyna jet kit but found factory needle's where the best after alot of testing on the Dyno & road .That's what a mechanic on the UK Firestorm list said too (at least as far as the 'Storms are concerned). Part of that is that a lot of factory needles have a more complex taper than the single taper of the Dynojet needles, and also the Dynojet needles are often softer so wear quicker.
The FahrtSturm had supposedly been Dynojet kitted, but I have serious doubts as to whether it had. But regardless of that, it had more honk than the other three or four I'd ridden.
With the VFR, I just shimmed the needles, and that did the trick - no rejetting required. :niceone:

[spudchucka]

Dynojet kits and Power Commanders really are worth the cost when done properly.
Lou
How about a "mates rates" deal on a power commander for the TLS? :spudwhat:

What? .....................I should stick what up where?........No need to be like that............we're all mates here....................aren't we????????????? :innocent:

[AMPS]

How about a "mates rates" deal on a power commander for the TLS? :spudwhat:

What? .....................I should stick what up where?........No need to be like that............we're all mates here....................aren't we????????????? :innocent:

Of course I'll do you a deal on a PC2. (They don't list PC3's for TL's)
But, I'm curious, why would you want a faster bike?

:confused:
Lou

[AMPS]

glad you got a good result Lou, don't forget to put brakes on your shopping list too.
I have had a bike dyno tuned at amps & although it was smooth & gained almost 4hp across the range it was 10kmh slower at puke.

I've got a 'handbrake' on my shopping list.
I gave the Bandit a burst on a piece of 'closed road' on the way to work. It has got serious grunt now and winds out nicely too, doesn't flatten off at high revs anymore.
Lou

[spudchucka]

Of course I'll do you a deal on a PC2. (They don't list PC3's for TL's)
But, I'm curious, why would you want a faster bike?

:confused:
Lou
I was thinking of the engine management benefits as the primary reason to have one. My bike has a seriously radical after market exhaust, (Yoshimura 2-1 Titanium) but only has the standard Suzuki black box thingy. I know that the tuning is way out because of it but there is stuff all you can do if you don't have a PC or Yosh box. So my reason for wanting one is to tune my bike properly, if it makes it capable of going faster that makes no difference to me as I control the bike, not the other way around.

So whats the price? Feel free to PM me if its a price too good for publication!!! :innocent:

[750Y]

I've got a 'handbrake' on my shopping list.
I gave the Bandit a burst on a piece of 'closed road' on the way to work. It has got serious grunt now and winds out nicely too, doesn't flatten off at high revs anymore.
Lou
I hope the handbrake's too your liking , expensive things but worth it once you got em adjusted right 8-).
back to dynoing...
I believe many tuners try to anticipate the effect of ram-air by 'estimating' the air-fuel ratio requirements at high speed. unfortunately this is a guessing game unless they're very familiar with the tuning of your particular model.
It is my experience that there are very few really good dyno technicians in this country when it comes to tuning late model sportbikes & I would go so far as to say that there are a lot of old school mechanics out there who have carried the basic principles with them but have fallen behind the game as far as fine tuning of modern sportsbikes is concerned. No offence to any mechanics on here. In the states & Australia there is a huge performance tuning market and the tuning experience tends to be better, but here there is less demand and therefore less experience. also.. motorcycle dyno's are a fairly new phenomenon in NZ and many are still playing catch up. I'm not aware of any dyno tuners running the full gas analyzers yet...

[AMPS]

I hope the handbrake's too your liking , expensive things but worth it once you got em adjusted right 8-).
back to dynoing...
I believe many tuners try to anticipate the effect of ram-air by 'estimating' the air-fuel ratio requirements at high speed. unfortunately this is a guessing game unless they're very familiar with the tuning of your particular model.
It is my experience that there are very few really good dyno technicians in this country when it comes to tuning late model sportbikes & I would go so far as to say that there are a lot of old school mechanics out there who have carried the basic principles with them but have fallen behind the game as far as fine tuning of modern sportsbikes is concerned. No offence to any mechanics on here. In the states & Australia there is a huge performance tuning market and the tuning experience tends to be better, but here there is less demand and therefore less experience. also.. motorcycle dyno's are a fairly new phenomenon in NZ and many are still playing catch up. I'm not aware of any dyno tuners running the full gas analyzers yet...

I kind of agree, but you do need to know the basics first then experience fills in the gaps. That's why the top guys cost so much, you're paying for the experience. While it's nice to have a four gas analizer, it's not really needed for power tuning. It is important for emissions testing though. Our analizer is a wide band lambda unit, it gives accurate and quick readings. Important on engines that rev as quick as bikes.
Ram air is a complication, you could always take it to 280 k's or so and do a plug chop. :devil2:
Lou

[750Y]

...Ram air is a complication, you could always take it to 280 k's or so and do a plug chop. :devil2:
Lou

lol,
i would if i were concerned about my current bike's performance but 280 comes-n-goes without much problem 8-).

[Motu]

The dyno tuners do a pretty good job considering what they are expected to produce with the equipment they have and the money the customer is prepard to pay.These are only inertia dynos,they don't test the motor under load...and we can't expect the tuner to test ride the bike to it's full capability in every gear and loading suituation.Also what the owner wants,and what he actualy does are two different things - he wants it race tuned,and rides it like a touring bike.

When I was a young fulla I used to look after an Alfa - oh,choise eh! I used to love working on it and would spend ages getting it to run really sweet....but he would keep bringing it back complaining of some small hic up or something.So one day I got him to take me for a drive and show me what it was doing - he was driving around town in top gear! This thing was only doing 3500rpm at 80mph! After that I stopped being so fussy and tunned it to his driving stylle.

[750Y]

good point, driveability on a street bike is probably the most prudent compromise.

[Lou Girardin]

I did the Kaiaua loop on Sunday, a bit of a blast really showed the difference. Front wheel lifting on the slightest bumps accelerating out of tight corners, trying for 5th when I'm already there because it felt like 4th. Lovely stuff!

[hodgeman]

Hey Lads,
I just got my 98 GSXR 750 SRAD back with a K&N & Yoshi TRS can.

Man, that can sounds awesome and it feels heaps faster thoughout the rev range and I don't notice any flat spots.
Granted I don't ride it like I'm running from the cops.
Would it be worth it, for me, down the track to save up for the $1000 or so it would cost me for a PC and Dyno tune session??

Any thoughts, feel free. :niceone:

[750Y]

i think suspension would give you better value for your money. Your bike is really quick already & if you don't ride it hard the money'd be wasted(maybe not wasted 8-) but certainly not put to best use for the rider). if only i had a spare thou i'd do my suspension/brakes.

[hodgeman]

i think suspension would give you better value for your money.
Like an Onlins kit or something?
I should probably get some decent riding gear first.
Boots and Pants are first on the list.
Thanks for the tip tho 750Y! :niceone:

[gsxr750]

Motohaus had a cheep (dono if still there, give em a ring) Onlins rear. Should fit your bike, wanting a grand, offer em 8
Nick

[750Y]

Like an Onlins kit or something?
I should probably get some decent riding gear first.
Boots and Pants are first on the list.
Thanks for the tip tho 750Y! :niceone:

DEFINITELY get the gear first! keep safe buddy...
i was thinking along the lines of springs/relavalving ohlins or racetech...
just smooths everything out nice.

[AMPS]

Hey Lads,
I just got my 98 GSXR 750 SRAD back with a K&N & Yoshi TRS can.

Man, that can sounds awesome and it feels heaps faster thoughout the rev range and I don't notice any flat spots.
Granted I don't ride it like I'm running from the cops.
Would it be worth it, for me, down the track to save up for the $1000 or so it would cost me for a PC and Dyno tune session??

Any thoughts, feel free. :niceone:

At least get a baseline dyno run done to check that a/f ratios are OK. Should cost about $85.00.
As I found out, the mixtures can be way out.
Lou

[TonyB]

I'm not aware of any dyno tuners running the full gas analyzers yet...
PBS Performance Bike Services in Chch have a Dynojet 250i with a gas analyser. Very useful piece of kit. Phone number is 365 3160

[TwoSeven]

PBS Performance Bike Services in Chch have a Dynojet 250i with a gas analyser. Very useful piece of kit. Phone number is 365 3160

What happened to PBS - they moved...

[T.W.R]

These 2 attached pages may offer a couple of ideas for the bandit. Its from streetbike #48 oct/nov97

[T.W.R]

something like that, and the dyno has gone to Honda country ashburton ( BP wants to play with his 2 RC45s)

[Kickaha]

What happened to PBS - they moved...

Nick closed up and went to work for Team Hutchinson Ford


something like that, and the dyno has gone to Honda country ashburton ( BP wants to play with his 2 RC45s)

Think it went further south than that, I was told Timaru as Johnny Hepburn was part owner of the dyno

BP? is that Brendan? he's also got a RS250 powered Superkart to play with as well

[TwoSeven]

Bugger. Is there another dyntotek 200i in chch - or do we all have to pile down to ashvegas or something ?

[T.W.R]

Nick closed up and went to work for Team Hutchinson Ford



Think it went further south than that, I was told Timaru as Johnny Hepburn was part owner of the dyno

BP? is that Brendan? he's also got a RS250 powered Superkart to play with as well

Yep Brendan, hes got to many toys, the RC45s, a VTRSP1, the supercart, fully HRC kitted XR650 supermotard, the Quad with a CBR1000(or similar) donk, XR6 turbo ute and god knows what else.

The Dyno was hot news around ashvagas just a wee while back so usually when the grapevines hot theres fact behind it. I'll findout this arvo when i see ralph at the suzy shop.

[T.W.R]

Bugger. Is there another dyntotek 200i in chch - or do we all have to pile down to ashvegas or something ?

theres an outfit out towards the airport that have dyno they run bikes on or the place near sydenham park/bluejean quisene have 1 also

[**R1**]

Kyle Macitrick(SP) down Johns Rd

he has the old harris dyno, and he is way cheaper than anyone else, $25-$30

[Sniper]

Should we make a day of it?

[pritch]

These are only inertia dynos,they don't test the motor under load....

I understand the most recent Dynojet models can in fact test the motor under load. (Using electric motors?) This ain't my field though, but if Lou doesn't know he can find out :-)

[pritch]

Bugger. Is there another dyntotek 200i in chch - or do we all have to pile down to ashvegas or something ?

The Dynojet website lists who has what model Dyno. Interestingly at least one of the NZ users has a later model than they seem to think...

[TwoSeven]

theres an outfit out towards the airport that have dyno they run bikes on or the place near sydenham park/bluejean quisene have 1 also

Yes, thats the car place on the corner. I've seen them run cars up on it on my way home. Havn't gotten round to popping in and asking if they do bikes.


I've been toying with the idea of buying one of those little kits that you build into your bike. Once I have a baseline I am really only interested in changes.