I know a couple of people have played with bike quad throttle bodies on here. I've finally got my setup starting and running but am having trouble getting a stable idle. The EGO is hunting and I think the problem is incorrect dead time (opening time) setting in my MSII. What have other people used? Anyone know a good resource? I don't really want to build a test jig to measure it. I guess the value for flow I got off the net could be suspect also.

Cheers

any chance of a pic?

hi I have 38mm zx6 t/b with zx10 injectors and i have only had a base map done and got close to 100kw [96some odd] so with proper tuning could possibly be over 100 and they were s/hand from one of our top bike racers here [danie maritz]. I looked for the specs but the bike inj specs are not so freely available. The setup ; ali tank,VW kombi fuel pump with exit side almost as thick as your thumb [normal fingers lol] then to rail then fuel pre reg[adjustable]then return pipe to tank.Gotech ecu,hall type dizzy.Iwas going to race but change of mind & now taking it back to road to get real use.OH big thing--- remember the argument about the v/stacks -- D and L18 B110 well I had a problem my t/bodies are round and oval on the v/stack side ---so why that? well i read an article about airflow and petrol mixture with the oval intake AND i went onto one of the American race sites [chaps race the hotrods with bike engines and they are keen to help]They have a chap to answer fueling,suspension,elec,etc etc.they told me to get rid of the b/fly cos that thing wants to breathe and thats what they do -- so took a chance and it's ok. now back to the v/stacks --as i said they oval so what now --well who says drinking and driving dont go together --they do -- i took 4 of the round s/steel drinking cups [for camping],checked specs for lengths cutthe bottoms off and bobs your uncle v/stack. they are round but if you squeeze it when fitting they are oval. Only one prob i had it cut and chap says he had to put wood inside cos s/s is so thin and make your own lip. SOooo no more drinking only one gas guzzling datto. I actually left my car for more than a year now cos gotta provide for rainy day so busy with prop deal[no2]Well thats it i think it's ok & the gotech or any ecu should work if installed CORRECTLY. I was told not gotech --let me tell you i've done way out things and the ecu is ok.Prossie and mechie both earn money on their backs lol.

a pic of what?

If its hunting i would have thought its in the tune. i cant remember playing with any of the injector dead time stuff. do you have a wideband on it?

I've been thinking about it more. I know the dead time's wrong because it over fuels at low RPM. The hunting I think is because there's some feedback happening somewhere and it's not right. I do have WB, I think I need to change a few settings in the tune and try again.

do you have the ego correction turned off? you need to have anything that can influence your tune turned off until you get a good state of tune other wise you will just chase your tale, also check the warm up enrichment isn't adding to much fuel.
if you are using itb's and a big cam you may not be getting a steady manifold signal so you may need to join the itb's with a synchronising hose and maybe put a restriction in the line. alfa/n setting is an option as well altho its a compromise.
is it fuel and spark or fuel only?

http://www.msextra.com/forums/index.p ... 2d4e84d01f65137a77087bdae

http://www.msextra.com/doc/index.html

Thanks for the replys.

There's a good steady manifold pressure, the ITBs came with a vacuum manifold and built in restrictor. Standard cam.

I got the ignition setup and working before swapping the head and injection on so at least it's only trouble shooting one thing at a time.

It's looking like I'll have to build a jig to measure the flow. Knowing the injection parameters will make it much easier to get a base tune and also allow me to get the VE map right.

Pic was just for a perv

I remember seen an earlier pic very pretty curved setup but never mind I see one of the inlets is blocked