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Injection is on the cards but not just yet.
I was thinking the same with the pressure ref lines I currently have that hooked up for the gauge and the BOV but I cant see how it would work at part throttle and everything I read tells me to have it in the intake stream.
Had a carb turbo here today , (god i like injection) but we did manage to get it better in transition, now just need to customise the needles, Yammie 426 dirt squirter,he had a 3g gauge with lc1 wideband controller, but it lacked the boost referencing and logging, i think a dl32 or wbo2 3a/3e http://wbo2.com/3a1/default.htm or a AEM aq1 would have been better
as you realy need logging to tune on the road, even gauges and a camera would be better than trying to watch and interpret while riding
I think in the long run it will end up with a simple injection fuel only system like the microtech lt4
Yella how are your needles and seats coping with the pressures, we found the yammy was marginal with very little base pressure, on boost the carb referencing was spraying a good rate of fuel and air out of the carb overflow, not much in volume when captured but sure looked more
Would a valve fitted between the vacume points (carb balance fittings) on the carbs, linked to the pitot tube float chambers work ?
The valve would have to be switched by a vacumbe/boost switch this would alow you to drop pressure in the fuel bowl at low boost/vac conditions then switch to the boost referance once a preset level it attained. Simple to set up with off the shelf bits but prob tricky to get right.
Two way valves off 80's to 90's toyotas can be had for free from the weckers one pipe is switched between two one is linked when valve is "off" apply 12 volts and it switches to the other. A ajustable pressure switch on the boost side wouls work easy enough to switch it.
i had a microtech mt-4. it worked, but not very well. it worked well on boost but off boost was crap. Bikes have a lot of cam overlap and therefore a "jumpy" manifold pressure.the microtech would not calculate fast enough and in TPS mode did not have enough adjusments. when i changed to the Autronic SM4 it gave me an extra 40hp and perfect throttle. I did contemplate running carbies with a microtech to squirt fuel on boost only into the plenum. don't know how weel it would work though.
They seem to be holding up OK I had the system pressure up at 12psi the other day and everything looked like it was holding together well. Will be rechecking over the weekendQuote:
quote:Originally posted by Booster
Yella how are your needles and seats coping with the pressures, we found the yammy was marginal with very little base pressure, on boost the carb referencing was spraying a good rate of fuel and air out of the carb overflow, not much in volume when captured but sure looked more
Had absolutely no probs with the mt 4, using tps with boost on top , very simple, easy to use for a first timer, fit and ride in a day , not saying the autronic etc are not better , just a case of what do you need and how much do you want to spend..
If i wanted better than the microtech , the next step would be a fuel and ign ecu probably from link, like the atom, or Vipec
, next up would be the Autronic, Motec
Fitted up the A/F guage complete with getto fab mounts :D:D
[youtube]http://www.youtube.com/watch?v=YKvq7wCMrqw[/youtube]
[youtube]http://www.youtube.com/watch?v=bqijkvMBuzM[/youtube]
Figured I would see if I can upload vids seems I can [8D][8D]
Tomorrow some real testing
Now you need to mount the camera where you can see the tach, boost gauge and a/f
A/f looks good so far what a/f are you aiming at idle, cruise.full throttle,on boost ?
Does look good.
For idle i would try and get it fairly lean but not lean enough for it to sneeze or cough.
I got mine to 12.2:1 at full boost WOT. Safe is good, but I could lean it out a bit more if i wanted.
It's hard with carbies, in a perfect world i'd aim for 12.5:1.
Looking to get it around the 12.5ishmark but will have to see how it goes.
Its sitting at about 10 I think and fouling plugs as the boost comes on (running like a pig) Thinking of getting a slightly smaller slow jet and some smaller mains and see what I can do. Before I do that the shutter speed on my camera and the flicker rate digital displays is in sync when I go out in sun light so I can not see the displays when I head out. Gunna try and sheild the camera so it thinks its in the dark and slows the shutter speed to the same as when im in the shed and see if I can get a run that I can watch to see WTF is happening.
Has anyone filled and redrilled the holes smaller in the slides?
If i ran my bikes at 12 or leaner on boost i get melted pistons, but rich misfires easier , so the compromise is to gap the plugs tight, like .018th and run ~11.5 on boost and mid 12 to 13 off , at this a/f on the long runs my egt stabilises at 1680 deg F and can hold that for a long time , thats taking the egt from the turbo inlet,
seen busa's on the dyno give troubles at 12.0 at only 6 psi
And yet we had a malfunction of a map sensor at Bonneville this year and ran for 5 miles at 16-17:1 AF without doing damage ... just not enough fuel to make cyl temp , but boy was the egt hot, went beyond the 2000 deg f of out k type thermocouple
I think I will follow what you are saying and try to get it to run at 11.5 or so being this is my first don't want it to end in tears to quick and you guy's know better[8D].
Knocked up a quick phone/camera bracket that I can bolt tothe tank and cable tie the phone into seems to work OK not flash but works.
On the test today the only gauge I could see in the vids was the fuel and it was heading up to 10 PSI at almost no boost so tried a couple of different ways of doing the hoses but ended up back as it was just cleaned up a bit and with a MIG tip in the line to try and reduce the pulses seems better.
By the time I got back to the bike it was dark so no need for a screen or lense for the camera :D:D so out I went.
As you can see from the short vid as soon as I open the throttle A/F goes to 10. You can see it down to 10 as I open the throttle and back to 12ish as I roll off, back to 10 as I open again etc etc and the bike misses and farts.
[youtube]http://www.youtube.com/watch?v=yTWS-zcvJQo[/youtube]
Main jets are 150/160,float level is down 3mm, stock needles and mixture is out 1 1/4, stock slow jet.
Think I will order some smaller main jets and smaller slow jets tomorrow and keep trying.
Your af gauge probably don't read lower than 10 so it could be even richer than that
I was thinking the same then found this
http://www.innovatemotorsports.com/p...uelTypeWeb.jpg
But will the sensor measure that low?
Dunno seems odd it but I will have to work on it.
Does anyone know any good places to get 99101-393 main jets heaps of people say thay have them but whenI check no stock will keep on looking
found em, all good, everyone stop looking :D:D local so should have them Tuesday
Also found a place in the US to get bulk 50,100 qty jets for $1.30 a jet so may get a bag just to have them
Doesn't have to read that low, each reading of different fuel types is a calibration of the 0-5v signal as long as you have that a reference chart you can use the gasoline figures , or lambda may even be easier as its applicable to all fuel types , just have to get your head around the numbers
From what I've read on the innovate stuff (I have 2) there good kit when setup correctly the linear ouput will only display from 7.35 to 22 but the way the sensor is digitally operated widens its operating range far more than old analog wide band systems.
I'm going to use the same as above to tune the gimp on E85 this is happy far richer than any petrol setup, with raw fuel being spat out the exhaust at just off idle and opening the throttle unleashes lots of fun when you would think it far to rich to even run.
Down to 128/132 mains and farrrrrrrrrrrrrrrrrrrrrrrrrrrk me :D:D:D:D:D:D:D it moves now.
A/F gets down to high 9 on the transistion and sits at about 10.5 on boost as best I can see when going and the video is rubbish can't see shit need a better camera.
[youtube]http://www.youtube.com/watch?v=q_9vgJmtv6c[/youtube]
As it comes on either the front lifts or the clutch lets go :D:D[8D][8D]:D:D[8D][8D]:D:D[8D][8D]:D:D gunna add some heavy duty spring order some more smaller jets again (only went down to 128 didn't think it would need that small but live and learn)
Yes I am happy buuuuuuuuuuuuuut I did note some oil in the intake not sure whats going on may need a reseal after all.
Next will be the radiator and intercooler but that will be a little later running out of time and hope to get it out for NFR maybe will have to see what I can swing.