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fuel injector flow rate

27K views 24 replies 7 participants last post by  Alf  
#1 ·
Hey, what is the fuel injector rated at for flow?

What pressure if anyone knows that?

I have searched, but so far nothing.

thanks
 
Discussion starter · #5 ·
KTMasean, no, I couldn't find it there as I don't know the exact model of injector. So many they make :)

LNICK, thanks, yea, I looked thru there but couldn't find the size. I messaged Chad about it.

THought of turbo, yes, but with 12.6:1 compression, a full rebuild would have to happen first. Then I suspect, even after one got all the plumbing sorted out and it was working well, the clutch wouldn't be a happy camper. Probably other things would go boom too. Going from 30lbs/ft to 75 or so would require more strength.

No, I'm just after the size so I can have an edjucated starting point for a map with the next size larger injector if I go that way. If you do a full exhaust system and one of the intake pipes, with open air filter and a properly mapped ECU, the stock injector runs out of juice around 7000rpm. Apparently, its a huge change in power and torque, and if you use the bigger injector and map it correctly, that huge change goes all the way up past 11,000 rpm! Somewhere in the 8hp range!

I don't run the Power Commander, but do run the Rapidbike Evo. I can map myself as I am fairly familiar with different ECU mapping systems, but they help out people who use PCV. No info for Rapidbike yet.
 
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Discussion starter · #7 ·
looks interesting. Not quite done yet, at the time of that posting at least.

Chad had some cautionary words, as did another poster. Echoing mine.

If they had a fully tested long term bike, and the kit was reasonably priced, I'd give it a go. $2000 Euro is NOT reasonably priced...
 
Discussion starter · #11 ·
1jzsupra, if you run a full exhaust system, and a really good intake setup including a very open pipe from the throttle body out, such as the one at Grey Area, you will run out of injector, even with a full dyno tune on a PCV. But you have to have all the flow. Even the good intake piping, and filter, but if the airbox has the lid on, it will be ok. There is a thread on it.

I don't have a dyno guy close, nor do I want to pay for it, so I want a starting point, so I need a stock size to do the math with.

KTMasean, yea, same stuff as before. that post is from 2016. no where that's got anything nailed down, no fleet of them with it running, no place to buy the kit or parts of the kit.
 
Discussion starter · #15 ·
LNICK, yes that's the upgraded one that I plan on using, but I still don't know the original size to compare.
 
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