Just finished mapping a slightly tuned DS1000 and thought I share the result.
The engine is bored to 1123cc, DP cams, one mm bigger inlets, hc pistons, stock diameter 2-1 and the heads taken care of by Erik Larsson in sweden.
It now lives in a sportclassic so a comparison with a hypermotard with the same DP cams and 2-1 will shed some light I beleive, they are similar in size, have similar airbox and similar exhaust. The hymo is also fully mapped out.
Dyno coming weekend with the usual long stacks that are cuttable, two versions, one set w no airbox and one set w airbox.
We do wide mouth stacks and the in box ones have to be cut some, that is the difference.
Let you know the result.
A pic from before dyno
To the bin you may think, hehe...
The bike is ohlins kitted front and rear, race fairing and bst cf rims, neat little thing.
Im the proud owner of the bike and i can tell you that its crazy fun to ride, like riding a moped with 1100cc engine.
The engine pulls soo hard.
The intake tryouts will be great fun to see if they give me any more.
Tom will be back with results later and il be back with the road test.
Here's a graph of my 1000DS engine from earlier this year. Engine not-big bored. Head work done by Chris Steedman. Engine build by Neil Barrett at Cornerspeed in the UK. High compression pistons, standard exhaust headers.
The 1000ss seems to perform well, Tom did another 1000ds only porting and cams and ig got very good numbers.
It seems as the diffrent lenght intakes works well.
Its nice to see the stock headers working so well to, as said the 1000ds isnt that bad fromt he start.
My next step is to add 45mm spaghetti exhaust since i belive that the exhaust is chocking the bike as it has been so modiefied.
I allso have 50mm throttle bodies that i have built and im just gonna try theese just for fun, got them for 100 dollors of ebay and that is way cheaper then tpo beast etc.
This is the graph from last dyno session. We ran it in every diffrent config you can imagine.
Opposite to what it was the run without airbox with custom wide bellmouths that gave the best improvement.
It really seems as the airbox is chocking the bike and mostly i think it is due to the way to small intake hole. I had made an airfilter frame and fitted a larger but still half the size of 900 monster panelfilter and that didtn give it enoght air. it helped but still to small.
With the airbox of and no bellmouths at all it gave allmost same hp with 4 nm drop in torque.
My thoght is that the intakes are to long and the airbox is constrictive both to small and way to small intake hole.
Both will be fixed with the new Throttle bodies and custom airbox. I really dont think that the 50mm instead of 45mm intakes will boost hp big time, i think it more likly to loose some torque. but its all a test.
Interesting comparing the Hymo, with the old -92 SS engine in my DB2 (944cc, stock head, stock (but dialed) cams, tight squish, Keihin FCR41 and Ignitech digital ignition.) Both run in the same dyno!
I lack 9 hp but max torque is almost the same. The Hymo has indeed a wider torque range, but I would have expected more from bigger valves, wilder cams, more CC and 15 years difference.
(Blue curve is with way too lean jetted orignal carbs. I can tell the correct jetted FCRs made a huge difference!)
/RedTop
Quote:
Originally Posted by TomTom
Just finished mapping a slightly tuned DS1000 and thought I share the result.
The engine is bored to 1123cc, DP cams, one mm bigger inlets, hc pistons, stock diameter 2-1 and the heads taken care of by Erik Larsson in sweden.
It now lives in a sportclassic so a comparison with a hypermotard with the same DP cams and 2-1 will shed some light I beleive, they are similar in size, have similar airbox and similar exhaust. The hymo is also fully mapped out.
That is quite cool numbers when you consider that there is 15 years diffrence. My old monster with simular engine to yours ran like a bat out of hell but ran out of steem on higher revs.
Here is a pic of my next experiment 50mm 916 throttle bodys that i have built.
Im allso fitting a full termignoni spagetti header.
Here are some pics of the 45-50mm spaghetti headers im getting rebuilt to fit the sportclassic.
Hoping this will help the engine out some.
They look realy sweet.
We have so many things to test next time, it'll be real interesting!
They all look like good stuff, but they seldom deliver the power you expect, show or go next time! We have a lot of references yes.
Spoke to Tom today and we might be off to the dyno next week if everything works out fine.
First of all we will run the new TB and same exhaust as last time to see what happens. After that i will finish the exhaust and airfilter setup i will be running next summer and then fine tune the "final edition".
One thing im interestead in testing is to make a tube so i can lenghten the intakes since im now shortening them big time compared to stock. But the new TB get some clearence issues with the frame if the get longer and it might be hard fitting an good airfilter.
We will post as soon as we are back from the dyno.
Finally finished with the exhaust, was a little tricky to get it to fit.
I was hoping for a bolt on job but ending upp duing quite a bit of cutting and velding.
To "flirt" with the old school duc racers i ended upp putting them in diffrent height, looks kinda nice.
I have now built i airbox in glassfiber and epoxi, it was a real pain in the... to get right since it has so many curves but now its off the "plugg" and is waiting to get coverd with 2 more layers of fiberglass and epoxi to give it som more finish.
If this works out well in the dyno i will build a new one in CF with a bit more finish.
The whole area on top will be covered with an airfilter sheet from uni filter and a lid. I want to keep it as open as possible since bench testing showed that no airbox works out well. Hoping that this airbox will be the best compromise of the two.
The reason for building a airbox is that with my custom TB´s thers is no box that fits and mounting pod filter will hit the fram in several places and require some pucks on the bellmouths.
Its allso a big up if this works out well since i can mount the coils and crank housing ventilation and other hoses to the airbox like standard.
It allso turned out that the fuel pressure regulator couldnt delivere enough with fuel for the new setup so i ended up buying a new fuelpressure regulator thats is adjustable. Only thing is that i have to build a manometer to try out the fuel pressure since there is no idea of nowing how much the fuel regulator supplies. Called up kaemna who i bought it from and he just said, nooo djuo jaast have too traaii iet bitte!
This is the "Plugg"
After removing it from the "plugg"
Best thing with the airbox is that i dont need to make mounting brackets for the ignition coils and fabricate adaters for filters etc. There is a big foam filter that covers the whole top of the box.
If it turns out well i will build a new CF box with some more finish.
I will be of to the dyno this week, if it turns out really bad ill just have to bin it but im really having my fingers crossed.
After a very good day at the dyno we finally got some results, bare in mind that this is a "street legal" version with airbox to keep down noice for trackday riding and sorting out the aircleaner/ignition coil issue versus the tesing we did that had no chance of really making it out in the real world, it was just pure testing to se what worked and didnt.
The 50mm throttle bodies smothed out the dip in the curve that we never really could get rid of with the oem TBs.
Then we fitted the new spaghetti exhaust and it was up 6 hp just by adding that and after some careful dyno tuning by hypertrick we where up another 3hp. One might say that the 2-1 system we used before didnt do it for this engine.
Config:
50mm TBs with short intakes.
Custom airbox.
Ported heads.
1mm bigger intake valve.
100mm bore.
HC pistons.
Spaghetti exhaust.
I might try some longer intakes to next season but for now i just want to ride this thing.
Im currently at an trackday at Gelleråsen and im really satisfied with the engine, its just really strong everywhere.
This is the latest graph of my bike compared to the best graph we got when the bike was "street legal" ie same as now but minus 50mm TBs and spaghetti exhaust.
You might se why im som happy.
This is my bike compared to a hypermotard fully mapped out in the same dyno with dp cams, full system.
Graphs on some boring stuff 2v.
[:I]
Cool stuff guys.
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