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Thread: Dyno results on cored cans

  1. #1
    Badger
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    Dyno results on cored cans

    Up at 5am this morning and spent the day with both bikes at FW Developments dyno rooms, the results i am more than happy with.

    This graph is my 04 bike which is now my track bike, this was done with standard headers,Arrows cans, Homer Ewe airbox and K&N filter, PC111, 130.6 bhp and 73.35ft of torque



    this graph is same bike with the difference being my cored standard cans instead of the Arrows 138.00 bhp and 78.ft of torque







    Richard the dyno operator was amazed as was i at the difference, check out the difference at 7k rpm, a difference of 7bhp, and at 8k rpm, a difference of 8bhp, the bulge at 6k to 7k is going to be nice for drive, can't wait to get on it now.

    This next graph is my road bike fitted with Smaltmoto full system, Homer Ewe airbox, K&N filter and PC111, 134.38 bhp and 77.02 of torque, nice fat curve for the road



    This graph is an overlay of the track bike in red and road bike in blue, the 6k to 7k bulge is impressive on the track bike



    Now i am gagging to get on the bloody things, anyway the cored cans seem to be a good job, and all for under 50

  2. #2
    One Liter Duc Eater DaveRSV's Avatar
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    That's pretty amazing that home made cored cans out perform a performance parts manufacturers silencers! Makes you wonder why doesn't it?

  3. #3
    AMA Pit Boss Sprocker's Avatar
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    That stuffs all gobbledy gook to me I have a lot to learn

  4. #4
    AMA Pit Boss rsvsteve's Avatar
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    Quote Originally Posted by DaveRSV View Post
    That's pretty amazing that home made cored cans out perform a performance parts manufacturers silencers! Makes you wonder why doesn't it?
    Why do they put oversize ugly standard silecers on new bikes as standard, surley everyone knows they get ditched for a performance item. Anyway i'm sure you could make a few pennies coring cans badger . Nice one

  5. #5
    Badger
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    Quote Originally Posted by rsvsteve View Post
    Why do they put oversize ugly standard silecers on new bikes as standard, surley everyone knows they get ditched for a performance item. Anyway i'm sure you could make a few pennies coring cans badger . Nice one
    Already had PM's asking me to do them Steve, don't have time to TBH, the 04 on cans are not so bulky as the earlier dustbins, so don't look to bad.

    Dave, i am amazed at the result as well, they also sound lush, a result all round

    Sprocker, keep taking it in and it will all make sense one day

  6. #6
    AMA Pit Boss rsvsteve's Avatar
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    My standard can dont sound too bad but jeeez the weight of it , having this weight taken off the bike you would of thought that it would upset the balance and handling but no worries there Akra light !

  7. #7
    Superbike Twin GrahamRSVR's Avatar
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    Badger mate thats impressive...correct me if im wrong but you seem to have made similar mods for each bike 04 & 06 but the 04 seems to perform on the Dyno better...Does that mean that the 04 is normally a bit better BHP than the 06?

    When you Dyno`d the bikes are the gearings for each bike standard and if not, does this account for any difference at all

  8. #8
    Superbike Twin GrahamRSVR's Avatar
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    Sorry ignore my last post!!!

    Before cored cans were fitted the 06 was nearly 4bhp up on the 04.

    Just had a thought is it the same engine in both bikes?

    I find it a bit strange that Aprilia have not managed to really up the power over the last 3 yrs,...then again spose thats why the v4 is enroute

  9. #9
    Badger
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    Quote Originally Posted by GrahamRSVR View Post
    Badger mate thats impressive...correct me if im wrong but you seem to have made similar mods for each bike 04 & 06 but the 04 seems to perform on the Dyno better...Does that mean that the 04 is normally a bit better BHP than the 06?

    When you Dyno`d the bikes are the gearings for each bike standard and if not, does this account for any difference at all
    The 06 has different sized valves and should produce a bit more, but the mileage could account for it as well as the 04 has 12k and the 06 has 3k on it, the 06 actually has more mods done to it, the Smaltmoto system is a full 60mm system.

    Not the same engines, each bike has it's own engine.

    The gearing has nothing to do with power output, the gearing only makes it feel more powerful as you have altered the final drive ratios so it accelerates quicker.

    All engines are different and perform in slightly different ways, by rights the 06 should be a bit more powerful, but the low mileage might have something to do with that, the bike was pampered for those 3k miles by previous owner, fastest it had ever been was 112mph, yes you read right 112mph!!!

    So it might produce a bit more once i get my hand on the throttle

  10. #10
    Superbike Twin GrahamRSVR's Avatar
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    cheers Badger, I am enlightened!!

    PS just paid for my Track fairing from ARD for my 04..hopefully should have it by 26th as I attending Cadwell Trackday..

    Badger, is there any complications removing lights etc..how easy is it to fit a track/race fairing??

  11. #11
    Badger
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    Quote Originally Posted by GrahamRSVR View Post
    cheers Badger, I am enlightened!!

    PS just paid for my Track fairing from ARD for my 04..hopefully should have it by 26th as I attending Cadwell Trackday..

    Badger, is there any complications removing lights etc..how easy is it to fit a track/race fairing??
    ARD is good stuff, i think there stuff is pre-drilled for mounting which will save a bit of hassle.

    Lights are basically plugged in, i assume you are removing all the original plastics?

    Have you done a trackday before?

    If not this is a good guide pinched from TM site:-

    What do I need on the day?

    The absolute basics are licence, bike, helmet (to ACU/British standard), gloves, boots, and one or two-piece (zipped) leathers. I also consider a back protector as an essential.
    If you have sparky sliders (knee/toe) replace them with standard ones as you will be told sparkies are not allowed during your briefing. Take your mobile phone and some cash. The mobile to phone someone if necessary (if only to share the excitement!) and the cash to buy drinks, food, fuel and spares if necessary.

    If riding to the track – then take a small rucksack or bag on the bike if you can. Ideally you want to take basic tools Eg. allen keys/ spanners to take mirrors off, zip ties and gaffa tape, water, a couple of butties, fruit, crisps and a chocolate bar or two. To keep energy and concentration levels up it’s a good idea to eat and drink regularly thoughout the day rather than waiting until lunch and then eating a lot. If you cant take tools or are unsure what to take don’t worry as there will be plenty of people at the track prepared to let you use their tools if you ask nicely. (If you go on a day where a few of us off Throttlemonkeys are going then meet up and use our tools and store bags and valuables in our car/van).

    If you are taking your bike on a trailer or in a van then prepare a check list of everything you need as theres nothing worse than getting there and finding you have left something you need.


    Do you need a licence on a trackday?

    Best principle is YES. Take your driving licence with you. (Both parts for the newer versions). If you do turn up without it the TDO (Track Day Organisor) will phone the DVLA on your behalf usually for a small charge of around 5. This can only be done on a weekday and you will lose any tracktime until this has been done.


    Do I need to do anything to my bike for the track?

    Yes and no. Whilst you are not obligated to do anything it makes sense to look at a few areas:

    1) Your bike will be working MUCH harder than on the road. Check tyres. Make sure they are upto the job (enough trad and good overall condition). If your bike hasn’t been serviced for a while its worth considering a service or at least an oil and filter change. Check brake pads and make sure they have plenty of meat on them. Have a general check over and make sure bolts are tight, chain is lubed and nothing is ‘hanging off’. Also make sure your exhaust is legal if your chosen day is a ‘quiet 98db’ day. If it’s a normal day (104db) this is not usually an issue.

    2) If riding to the circuit – Before going out on track remove or tape up your mirrors as you don't need them and they will be a distraction. Its also a good idea to put tape over the speedo (not rev counter) as again you don’t want to be looking at your speed. Its also worth taping up indicators and lights ‘just incase’ (if you are unfortunate and have an off it stops glass on track).
    Some people remove or tape up their numberplates. Its personal but it has been reported in the past that insurance companies have had representatives there (or looking at photos afterwards) making a note of registration numbers should a claim be made on or near a trackday.

    3) Reduce your tyre pressures from road settings to about 30 front and 30 rear. If unsure ask the tyre man or one of the instructors. Tyres will be running much hotter on track so this drop in pressure will allow them to work more efficiently. *REMEMBER to put them back to road pressure if you have to ride home*. (If you don’t have a pump – just ask as there will be plenty of folk that will let you use one).

    You can buy track bodywork and crash bungs for your bike. Fitting these is a very good idea if you intend doing a few days (or buying older panels which can be swapped over). The bungs can be useful for road riding aswell but if fitting track bodywork bear in mind that it will not have cut outs for the lights.


    How is the day organised?

    You can usually sign on from around 7.30am. You just need to fill in disclaimers and liability forms (or present them if you have done that in advance) and collect your wrist band (which gets checked before heading onto the track). Briefing is usually around 8.30ish. This is compulsory and you will get a card, sticker or second wristband (depending on TDO) to show you have attended. If you miss this you cannot go on track until you have attended a later briefing.

    The briefing will cover what is expected of you on track, the order the groups are out, warm up laps and last lap passing policy, flags/ marshals, ordering photographs and use of instructors amongst other things. (Each TDO has their own briefing format). The briefing usually takes 20 to 30 mins and Novice group are sometimes asked to stay back for a few additional pointers.

    There will be three groups - novice, intermediate and fast. If its your first trackday its best to start in Novice. The organisor will be happy to move you up if you are finding the pace too sedate. Likewise if you book straight in the Fast group and aren’t upto the pace they will move you down. The key is to be honest with yourself when you book – accepting that if you are not experienced with trackdays you have a whole new learning curve to go through. Not only do you have to learn the circuit but your riding style in relation to the road will develop very differently aswell.
    The groups will be annouced over the circuit PA system. Some TDOs also use flags – a different colour for each group.

    Sessions are normally 20 minutes per group which means that you'll get 40 minutes break in between. Lunch is usually around 12.30 to 1.00pm for one hour. Sessions then continue until around 5pm dependant on light. It is fairly normal to get six sessions and sometimes seven sessions in a day. The number can depend on stoppages though so nothing is guaranteed.


    What else is available to me on the day?

    Instructors. You will be told where to ask for some time with an instructor in the morning briefing. Its free and very worthwhile. The instructor will follow you round, watch your lines. He will then pass you and let you follow his lines. (This is why some instructors leave their mirrors on – so they can see ‘pupils’ behind them). Once the session is over you can find the instructor and get his advice on your riding and lines.

    There will usually be a tyre man at the circuit (although this isn’t guaranteed so worth checking beforehand if you are likely to need their services). They will supply tyres, swap your tyres over if you have spares or wets and will (if you ask nicely) alter your pressures if you do not have a pump.

    Suspension services are now becoming more available where you can get your bike set to base settings and then to your specific weight and riding style with adjustments throughout the day. This is usually around 45.

    There will be a photographer. Some require payment up front in the morning and others will take payment on the day or afterward (off a website). Prices are usually around 7 for a single photo and upto 35 for a disc with a dozen or more pictures.


    Will food/ drink be available?

    Yes. Larger circuits have canteens and smaller have burger vans. If you haven’t been able to bring plenty of water and food for the day then you will be able to buy at the circuit but as ever be prepared to pay over the odds. Remember to drink plenty to keep hydrated and eat small and often to keep concentration levels up


    Will there be fuel available onsite?

    Some circuits have fuel on site which opens at lunch time. Be warned its usually expensive but not often available. Best policy (if you cannot take spare fuel) is to fill the tank near the circuit on the way there and then pop out at lunch time and re-fill if you need to. There is asually a petrol station within a few miles form the circuit and the TDO will be able to give you clear directions. If you do go out for fuel remember to re-attach number plate or take tape off if taped up (and mirrors if you need them).


    Will the day get stopped if the weather is bad?

    No. Not unless the circuit stops the day (not the TDO) which will only happen very rarely. If its raining just take it very easy and concentrate on smooth throttle control and smooth lines – Or sit in a dry garage until it stops!!
    Even if you take the cancellation insurance some companies offer this is null an void if they get you on the circuit for even part of a session so is not really worth it. (Just my opinion there).
    If a days is cut short because of weather then generally that’s it. No refunds.



    The main thing about doing trackdays is to go there and enjoy it. If you can go with mates - or meet up with folk at the track I find that does add a bit of fun to the day with the craic and banter. You can also borrow and lend stuff that way! If you travel over alone then get talking to folk as thats how this Throttlemonkey forum started! cool.png
    From a riding perspective just go and take it easy whilst you get a feel for the circuit and prepare to be amazed at how good your bike is! You will be told during the briefing that its not a race and thats exactly right. Whether you are the fastest or slowest out there - ride within YOUR limits and enjoy it. You will find as you settle down you will feel you are improving and going faster each session and with confidence can start to extend your personal limits.
    Last edited by Badger; January 4th, 2008 at 08:56 AM.

  12. #12
    GP Champ rsvr47's Avatar
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    Badger excellent write up for the novice rider to the track day and probably for those that have done a few

  13. #13
    Superbike Twin GrahamRSVR's Avatar
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    Many thanks Badger mate, even tho iv done a couple there was a few comments there I have taken heed off...mainly the Tyre pressures,, in the past I just made sure they were coreect..I will dropp them this time!!

    I do have a few more questions tho, does anyone know if my Titanium Aprilia race cans are below 105db as I prob need a sound test b4 I turn up otherwise!!

    Also in the suspension manual there are normal settings and race settings for the Ohlins...should I adjust it to the race first or go with what im used to first then change

    Also the food thing is a good idea..my last one at Donington I had a stodgy stomach all afternoon after a big cheeseburger at lunch..little and often and drinking enough fluid defo is the way ahead!!

    RE my bike the only thing left on her will be the tank and the hugger front and rear.

    I havnt come off yet on track touch wood but if I do I know the faining will cost me dear to replace!! lol Hence ARD faining..also Im thinking about doing that Endurance racing scene via Hottrax...Just need to do my ACU test day in Feb then I can join!

    I know I def o need a lot more miles on the Factory before I can be any good on the track but theres never a good time to start i Suppose

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