Beans

Normally i would take this to PMs but it's cool to get both your opinions at the same time.

For what its worth I had a coil fail on this bike when it was stock, so its possible the coils are weaker than most.

If I have to do an upgrade (which its looking like I'm going to have to), what are both of your thoughts on boosting the output of the stock coils ($600) or buying a set of high output coils ($800). I'm leaning toward just dropping the $800 on coils if I cant make the current hardware work, but I know there are some serious bikes that swear by things like the NLR SIM.

I assume the Dynojet Ignition Module increases the impedance in the system and therefore delivers lower input energy to the coil?

I really don't think I should do a CDI conversion to run relatively mild boost levels...

Turbo bike problems.... :-)

Edit:

http://blackopsmoto.com/motorcycle-category/GSXR750

or

http://www.takai-racing.com/main/ignition_coils.htm



VS



http://www.nlrsystems.com/2009/catalog2010_nms1000.html

LSxWittles

Awesome build man! Can't wait to see this beast in some vids putting in work! This makes me want to build a boosted bike lol. May have to get another gixxer 1k some day and try my luck.

ajrothm

Some have issues, some do not... Its just something easy for him to try.... I would try all of the easy/simple stuff before dumping $800 for coils...

We made 650 hp on a GT4042R turbo busa with stock coils/stock ECU....at 36 psi on C16--- Bean's coils should be plenty strong...

Some ECUs just don't like any kind of crank signal interference...


Beans:

Basically, take it back to the way it was before when it was running good with no misses, then add one component back at a time until the misfire develops, then you know what it is..

If youre worried about cooking it by running boost at stock timing, switch it back to fuel and run C16 JUST until you figure out the issue, it will give you more room for error... But honestly, if you have good control of the boost and can keep it at 5-6 psi, E85 will be plenty to support that at 12.5-1 comp and stock timing...

Don't just start buying high dollar parts and throwing them at it hoping it will solve the problem...odds are, you'll waste a ton of money..

oldgixxer

*Gotcha. All my built bikes have had the OEM Suzuki coils/ECU's as well(including my 35R Bus)and like you stated,never had an issue.




Beans,
Spot on info,I agree with AJ 110%.
There are always teething issues with turbo builds,each bike has its own share of minor issues that pop up. Its all part of the process,it'll all get worked out and in the end you will be the wiser for it.
Suzukihayabusa.org is a jackpot of turbo info,may be worth poking around there for a bit as well. There is a member who has a nasty turbo 750,he may be able to correlate to your problem

Puck

iTrader: (17)

Looking real good man, can't wait to see when you get the kinks sorted out.

Beans

Thanks man!

It ended up being a lack of coil energy. I put a set of NGK iriduims in it (had coppers before which were't working at .020) gapped at .018 and it's clean as a whistle all the way to the limiter at 14K.

I'm sure as i hit it with more boost the issue will arise again. I bought a set of used coils for cheap as a little experiment to see if mine are tired. If they aren't, i lost $30, but if they are and the new set works better than i saved $800.


Soon, very soon!

Thanks, she's good to go now, at least at this boost level!

ajrothm

Good job figuring out the issue!

I had a similar issue with my Ecoboost truck.. At 21 psi it would miss/bang out with the stock plugs. Switching over to a ford motorcraft iridium gapped at .018 it runs clean as a whistle..

I doubt you have any more issues now.. I'd like to see you make 200hp with it..