ESE's works engine tuner

[husaberg]

Any one ever seen or used one of these?
NIBBI Programmable CDI Unit + Software

https://www.trademe.co.nz/motors/mot...1421553799.htm

[peewee]

richened the current needle quit alot and third power jet now installed . ill try some nitro again this weekend and see what happens . might end up welding on another chamber to the float bowl for more capacity

[SwePatrick]

Well,, it never detonated.
That gives me some comfort in my ego.
As i thought i had control of detonations etc etc.
And as it shows, i still have =)

It was a 'simple' pistonfailure, probably due to pistonspeed.
I´m fully aware of that i am pushing the limits on pistonspeed.
And this failure i can take with 'pride' *lol*

Cylinder and head is still like 'new', no problems there.
I just need to hone cylinder, clean things up.
Put a new piston and new mainbearings in, and ofcourse smallend bearing.
Then it´s ready to go again =)

98.56hp can do this to a cast piston(vertex), maybe a forged one(wiseco) can take the stresslevels a bit better.

[Grumph]

[QUOTE=SwePatrick;1131063950

98.56hp can do this to a cast piston(vertex), maybe a forged one(wiseco) can take the stresslevels a bit better.
[/QUOTE]

So your gout of flame out the carb was the back falling off the piston....Doesn't take 98hp to make that happen.
Perhaps a little less cutting - and a replacement schedule.
Lucky though with so little damage.

[SwePatrick]

It was a little bit of sarcasm and joke involved in that statement

I would say it is quite stressful for a cast piston at up against 14000rpm on 61mm stroke, and i´m like a guineapig.
I couldn´t predict when piston would brake, it had to be tested.
And a forged quality piston would take more abuse is my thought, to prolongue the life.
I never cut anything out of the bottom of the skirt, just drilled boostwindows, very far away from sensitive areas.
Have been doing this to forged pistons earlier in other engines with no problems whatsoever.

So i bet it is my high pistonspeeds added with very high power that killed it.
I also have a long rod/stroke ratio to ensure the piston had some sort of stressless life even due to high revs *lol*

I was around 28.4-28.5ms in pistonspeed.
Everything above 27ms is sorting men from boys pistonwise

[TZ350]

.
%$((&^%$%^## for some reason these pictures from my phone are the right way up on my computer but turned when I up load them, try as I might I can't get them right ......

Some of the spirit of Bucket racing can be found in the clever modifications being done by racers.



This Yamaha R150 was about 136kg originally and is now 84.5kg. Handmade frame, swing arm and lightened wheels and brakes. At 84.5kg this 4T is much lighter than my NSR/GP110 2T.



The latest engine mod on Paul's R150 is the down draft inlet tract. Blue line is the original horizontal inlet, Red line is the down draft inlet, other than fueling, no other changes.

I post about these clever 4T's because they are serious pieces of work and us 2T boys need to keep developing our own bikes if we wan't to keep up.

[Frits Overmars]

This Yamaha R150 was about 136kg originally and is now 84.5kg. Handmade frame, swing arm and lightened wheels and brakes. At 84.5kg this 4T is much lighter than my NSR/GP110 2T... I post about these clever 4T's because they are serious pieces of work and us 2T boys need to keep developing our own bikes if we want to keep up.

Losing 51,5 kg is no mean feat. And I get the impression that even more weight could be saved with other wheels. Or do the rules prescribe wheels from a street bike?
I also like the centralized fuel tank, the stepped exhaust header and the high-tension gear pedal (that's an NGK plug cap, isn't it?)
But 22 hp shouldn't worry you too much. A good 50 cc 2-stroke can do that. And a 100 cc 2-stroke should walk all over that R150 power curve.

[ken seeber]

Frits,
It's a H/T brake pedal, so that'll detract from their 22 hp even more. So, the 2 stroke wins again...
Otherwise though, good effort...

[Frits Overmars]

Frits, It's a H/T brake pedal, so that'll detract from their 22 hp even more. So, the 2 stroke wins again...

Right you are Ken, it was a brake pedal, not a gear pedal (I blame the tilted picture ).

[jonny quest]

How did the rev limiter get changed on that 150 4 stroke?

Any pics of the head mod to downdraft?

[LSENG]

How did the rev limiter get changed on that 150 4 stroke?

Any pics of the head mod to downdraft?

Aracer ecu to change the rev limit, the head was not altered to change to a straight inlet path, only the inlet manifold which was turned up side down and the injector boss transferred to the opposite side. This part is pretty straight forward. It is the modded fuel tank with pump inside and subframe that took a little time

[mr bucketracer]

How did the rev limiter get changed on that 150 4 stroke?

Any pics of the head mod to downdraft?

if you look at the graft it was done over speed not rpm , diffient gearing so can't compair them gafts to well

[RomeuPT]

Hi.

Does anybody know if it's possible to put a solanoid power jet on a TMX 38 without paying 120£ just for the kit, any seller?

[breezy]

Any one ever seen or used one of these?
NIBBI Programmable CDI Unit + Software

https://www.trademe.co.nz/motors/mot...1421553799.htm

well.. thats a no from me mate,,,

[peewee]

hey guys. last couple days I been working on increasing float bowl capacity as much as the chassis free space would allow. originally it was 4oz (.118L) and I managed to get it up to 6oz (.177L). so I guess that's a 50% increase. it probly doesn't sound like much but this bike only has to make it about 500' at most. if I run into problems later and it isn't sufficient then I have a few more ideas. might add another secondary fuel inlet with its own float valve but im not concearned until I see how this setup works out.

also I found out these lectron needles can only be richened so far then they will pop out of their bore when the slide is fully opened and prevent the slide from going down which is likely to meen a run away engine or big crash. since mine is on the ragged edge of nearly popping out, if it still isn't rich enough then ill have to get a new richer needle.