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Project; Whizzy Pop Slingshot


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Posted

Its sad - the 3 axis bits look soooo smooth and shiney - makes everything else look bad! Its not bad, bad, just looks rough if you know what I mean?

My CNC mill is so small i'd have to turn that part around and do it in two halves - I have tool envy!

Yea I know what you mean, 2d just isn't as nice as 3d!

The maching marks will be removed before anodising though, keep it looking good.

 

Got clip ons fula, they've got a 50mm rise so the bars sit just above the top of the forks.

Posted

I actually like " raw "the look of parts with machining/tooling marks , that combination of raw looking parts with the clear coated Harris frame on this site would be awesome 

  • 2 weeks later...
Posted

Recieved some bad news last week, the issues John has been having with the bike have continued. He got it idling nicer but the outer 2 cylinders were burning hotter than the inner 2.

The lambda reads slightly lean but the plugs are sooted up so there's an issue there somewhere.

Now the bike no longer runs, the ecu doesn't connect to the pc, the fuel pump runs continously on power up and the ignition amplifier is too hot to touch.

Basically, there's an issue with the wiring somewhere and the ecu is dead.

Obviously there are more ecu's out there now which are much better packages and they're more affordable too.

So I'm waiting on a price for a new ecu wired in and set up.

Not ideal but just got to keep going, will still go for an MOT this year and try to get some miles in on nice days.

Posted

Christ that's bad luck man. Did your inlet plenum have a central divider in it? I have read that uneven charge to the cylinders is pretty bad on a draw through intake without it?

So you actually replacing the microsquirt with a different brand ecu

Posted

Yea will be going with a different ecu. The microsquirt doesn't seem to be reliable and I'm sure its been playing up ever since the issue with the crank sensor.

 

No divider plate in the plenum, different opinions on it I think but I'll see how it goes once its up and running properly.

Posted

Re Divider plate - would depend on where the injectors were placed. Used to be common with a carb set-up, that the air flow would swirl in one way or the other

and fuel distribution would go to hell - even with - it wasn't brilliant!

Have you any photos of the injection / plenum set-up as I was working on an injection plenum for my old draw through but never finished it, As it originally

used a 2 1/4" S&S, I was going to use a BMW 60mm TB where the S&S was. Strange with the Microsquirt - haven't heard of many reliability issues with them

- was it DIY build or bought in? Big shame as its a promising looking project!

Posted

Pic of the plenum and injectors.

20150220_201706_zpsufnqxafe.jpg

 

The microsquirt was bought complete with the wideband lambda etc, I wired it all up following the instructions that came with it, each pin was listed to where it went and each wire was labeled too so I'm sure it was wired correctly.

The first time it ran it was sweet, but after the crank sensor issues and firmware upgrades its never been the same.

  • 2 weeks later...
Posted

So John at Track Electronics has spec'd an ecu and given me a price for supplying, fitting and dyno tuning.

I've cried, looked at my bank balance and cried some more!

Things should be moving forward though and hopefully John will work his magic and I'll be picking up a running bike soon.

Posted

The fact that the outer cilinders are running lean is strange.

On my dthrough the outer cilinder ran too rich, got a divider in the middle did not changed a thing.

been chasing gremlins for months until i installed crosmember from two small 1 mm thick stainless plate in the intake.

after that al my problems where gone.

too bad your ecu let you down, but hang in there once the gremlins are solved you wil be happy i can tell you by expercience

  • 2 weeks later...
Posted
It is a shame. And there are alot of traps with Squirt products.
A guy who I helped went from running ok to all sorts of weird stuff going on after a firmware upgrade. Turned out he had installed the firmware for megasquirt 3 rather than the MS2 extra that microsquirt uses because the new microsquirt is called V3.
Posted

Mine has been good, never let me down, and worked alot better than my carbs ever did under boost.

My only issues have been with trying to use a tablet as adashboard. Never effected how it ran just burnt a shit load of hours trouble shooting to still have trouble.

Posted

What exactly do you mean by crossmember with reference to the intake?

A 4-way divider in the intake or...?

yes a 4 way divider as long as possible from thin stainless sheet in the intake, I had a divider in the plenum but that did not do the job

Posted (edited)

Mine has been good, never let me down, and worked alot better than my carbs ever did under boost.

My only issues have been with trying to use a tablet as adashboard. Never effected how it ran just burnt a shit load of hours trouble shooting to still have trouble.

Well that ruins those plans. I was hoping to run a small table as my gauges and data logger.

Edited by Racing Geek
Posted

Well that ruins those plans. I was hoping to run a small table as my gauges and data logger.

mate, go for it, my phone works with shadowdash on bluetooth, Ok. Just when I started down that road, shadowdash didn't exist and I was trying to get a full version of tunerstudio working on a windows based tablet. Just couldn't stop it glitching. An android tablet such as a galaxy should be fine.

  • Like 1
Posted (edited)

I think mine has had firmware issues from the start to be honest, I'd re-flashed it with the ms2 extra firmware and it had helped the vr sensor problem but I wouldn't be surprised if there are other issues with it as well.

 

@Screwriverracing, think mine was about £700 for the Ecu with loom connector, wideband data logger and a few sensors.

The ecu alone was £300-£350 I think, check on triggerwheels.

Edited by Danm54
Posted

Well that ruins those plans. I was hoping to run a small table as my gauges and data logger.

i use my 7 inch google tablet too log using msdroid works perfect.

i can also use it like a dash if i want too 

  • Like 2
  • 4 weeks later...
Posted

Got an update earlier this week, its all wired up ready but John wanted to test the injectors before continuing.

They're a pain to get out as the turbo and plenum has to be removed but he got all that out and tested them. Injector no. 2 was only flowing 60% of  what it should do so they're off for a refurb at the moment.

Explains a bit of the poor running.

 

So, closer but still a way off. Its in good hands!

  • Like 2
  • 3 weeks later...
Posted

looking at the picture of your plenum!

A neat job, do you run a single butterfly with a throttle position sensor before the plenum?

Home made or from another vehicle?

Do you do this stuff as a job? Never ridden a turboed bike myself but reading all the builds on the forum makes me want to build something!

 

 

Posted

@Pheasantplucker  I've used a single throttle body off a Ducati, 52mm I think with a throttle position sensor, mounted before the turbo draw through style.

It has the same id as the turbo inlet so should allow a good flow of air to the turbo wot.

 

I'm a plumber by trade so the last few years have been a learning curve on bike building.

 

Small update while I'm here, the bike went to Specialist Components last thurs for crank/tdc setup so tuning should hopefully be underway.

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