ESE's works engine tuner

[husaberg]

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.

Pewee have you made the float heavier to account for the different density of the Methanol?

[peewee]

no I don't know anything about that. will the buoyancy not be the same as with petrol ? from what I could tell it seemed to work ok with the methanol so far. I got the floats from a guy that sets them up for methanol so I think maybe theyre different than a standard petrol carb. ill be adding in some nitro and increasing the percentage as much as my fuel system will allow so maybe that will have some different affect on the floats

[peewee]

hey guys i got some questions. the tube that the needle slides in that sticks down to the bottom of the float bowl, does the end of this tube always have to be below fuel level in the bowl ? i wasnt sure if it would mostly just suck air if it was above fuel level. other question is would it be a bad idea to put a powerjet on the front side of the carb slide instead of on the backside ?

[wobbly]

Absolutely for sure the suction tube of the Lectron that the needle slides in, should be right to the bottom of the bowl.
If its above the fuel level in the bowl it will suck air - and kill the engine.
Same applies to the power jet suction tubes, they should be right at the bottom of the bowl, on the engine side if the carb is angled down ( to have the highest fuel level above them ).
If you put a jet on the exit side of the carb it will drown the engine with fuel when you close the slide.

[peewee]

thats what i figured wob. something told me to only make the bowl wider and not deeper

[husaberg]

no I don't know anything about that. will the buoyancy not be the same as with petrol ? from what I could tell it seemed to work ok with the methanol so far. I got the floats from a guy that sets them up for methanol so I think maybe theyre different than a standard petrol carb. ill be adding in some nitro and increasing the percentage as much as my fuel system will allow so maybe that will have some different affect on the floats

The specific gravity for Methanol is different. The float will ride higher due to the increased buoyancy and the bowl will empty faster as a result.
You need a heavier bowl to compensate for the difference . In the old days they used to add lead solder to the brass float.

thats what i figured wob. something told me to only make the bowl wider and not deeper

much like one of these. Boyseen Superbowl

Or this for a hardley

[Tim Ey]

Hey Husa, I only knew the superbowl for Pj/Pwk ( Fb02). Do you know which one fits the Pwm / Pwk Shortbody?

[husaberg]

Hey Husa, I only knew the superbowl for Pj/Pwk ( Fb02). Do you know which one fits the Pwm / Pwk Shortbody?

the one in the pic on top.
I will have a look at the pic coding and see.
I never knew either till i seen the pic.
Odd i tried looking under 1998-2000 KX and 2016 KTM ansd the only Keihin on Boyseen says it doen't suit?

[41juergen]

A friend of mine has NS400R. Yesterday he opened the water pump cover and I was surprised about Honda's idea of an impeller..


Can this piece work reasonable? I would install something like the RZ style... what do you think?

[speedpro]

Why fix something that isn't broken?

[F5 Dave]

Hand back your Man-card Mike

[TZ350]

Can this piece work reasonable?

A lot of cars have that style of impeller, easy to make I guess.

[TZ350]

Red line is throttle, Blue is rpm and Yellow LamWO2 sensor.

Same rpm and load/fuel injection amount at both cursors.

Nothing happens until the engine slows down to about 7k rpm where the pipe starts to work against the engine. Then it fires and Lam goes from lean to near right. Then there is a period of rough running pulling out of the pipes reversion hole. Then takes of at Lam 0.88 as it gets on the pipe.

The puzzle is, why does it fire when the pipe works against the engine and not while the pipe is in tune with the rpm as the motor is slowing down? ... same throttle and fueling both sides.

[husaberg]

A friend of mine has NS400R. Yesterday he opened the water pump cover and I was surprised about Honda's idea of an impeller..


Can this piece work reasonable? I would install something like the RZ style... what do you think?

VT250 has a similar impeller
Likely heaps others do as well.
Not sure but it likely is a one piece with the seal not made to be servicable in true Honda style.

[F5 Dave]

You meet the nicest people on a Honda.
Until they get to the parts counter.