tony1

I was able to attend a Motec seminar at the PRI show last year at which Paul Yaw spoke about fuel injectors. I learned a lot and have been on Paul's *** to put it on the site. After a lot of nagging and harrassment, he finally got it done.

Check it out, it's good reading.

http://www.injectordynamics.com/dyna...erization.html

I'd love to hear feedback on it.

Riake

The first graph is linear, but just offset. However, that hardly matters. Too bad it is not complete yet. Good article so far.

Did he hold a seminar at this past Decembers PRI? I was there, first timer, so I was a bit overwhelmed. I really wanted to attend some of the miscellaneous seminars about power production.

HiProfile

Smells like guerilla marketing to me...I'm already planning on getting some eventually, so I'm imune

I had a HUGE issue with deadtime using DSM450's on eCtune, before I figured out I had a setting wrong. When you select an injector, it only uses the batt offsets for that injector, not the dead time. It was really freaking me out until I found the setting for it. I've seen a less-thorough explaination before, and Paul's is very nice.

Only thing I'd add is an explaination how the non-linear endpoints affect idle. He could then say "BTW, I happen to have some saturated 1k injectors now that don't do this..."

tony1

You are absolutely correct, but if you plot it against predicted flow based on the flow rate of the injector, the curve is non linear.

And yes, the seminar was at this past Dec. PRI. The show is definitely overwhelming! So much to see and you don't want to miss out on anything!

b20beast83

ok i read it and im even more confused

tony1

lol. Just make sure your tuner understands it after reading it and you're good to go.

b20beast83

i am my tuner
lol

093turbo16

iTrader: (2)

That is a very cool read.

Thanks for sharing!

Blown90hatcH

Haha. There are some good SAE papers on injectors and flow testing out there that will blow your nugget.

Tony all injectors are the same duh.

boostedcivicsir

great read. i am an idiot and i think i understood that.

kte324

iTrader: (2)

Great write up. I understood it.

twkdCD595

VERY good write-up, I read it and found it to be very interesting reading! GREAT brain food.



Thank you for pushing to get this kind of information posted on the ID site.

ahobbs

very informative right up for those who want to learn about what they own or how a good injector works and why it does what it does. Makes since Tony with What you told me Since the terms where spelled out easily

0mtber

iTrader: (2)

I usually find that using the oldest & dirtiest dsm injectors I can find produces the most power! Injector flow is over rated!... lol jfwu

Tony the Tiger

Bah, I just let my wideband closed loop O2 do everything. Running lean at different elevations? Just set my O2 correction trims to +/- 99% and have it work all the way up to 30 PSI of boost.

j/k

It was a good read indeed

tepid1

Good read indeed....

Tony, could you invite Paul to H-T to join this thread?

I have several questions and thoughts on this.

I'm curious as to what he has to say about actual injector voltage and how that affects flow. I'm also curious to see if there is a change in injector temperature with a change in voltage (higher voltage = lower current = lower heat) or if it even matters with such high cycling....

On a side note I really like his injector calculator too. Very nice work Paul.

sewell94

I've got something that will take care of this, the final prototype is being tested as we speak. But it makes a set of 1600's(and bigger) VERY easy to tune. It'll also make the high pressures capable bosch injectors at even higher pressures.


But from our testing the higher voltage(depending on how its applied) will make the injector run hotter, but haven't had any negative effects. The dead times really go down with the higher voltage. With the the unit being tested, who cares about the battery comp tables

tony1

Higher voltages make the dead time decrease, overall increasing the actual amount of fuel available.

You have something that makes the injector work instantly, eliminating the need for 'dead times' since there is none? Interesting..

tony1

Teglove2

Great info Thanks Tony....glad I bought ID 1000's for my build hopefully Correy Parrish will have a good time tuning them after he puts a GOOD crank in my motor ahhh!

tepid1

Wow, so the higher voltage makes the injector run hotter? Kinda seems like it defeats all laws of electricity and the thermal properties associated with it....

Also the comment "(depending on how it's applied)" doesn't seem to click with me either. How could you apply it any differently?

Something just doesn't seem right man, but good luck with your super secret project.

red02s2k

Ok what is the rest of the story? I think I need to learn some other things before I being to understand everything perfectly. But Thanks

Riake

V=IR

How, if you keep the same resistance and raise the voltage does your current decrease?

EARLdaSQUIRREL

pretty neat article, learned some things and it put some things into perspective

tepid1

He was talking about different injectors.... I assumed using P&H 1600cc's instead of the ID 1000cc Saturated. That was the difference in resistance so it was not constant....

And the proper equation to find current would be I=E/R

Example....
I = 12.0vdc/2ohms = 6A (P&H)

I = 12.0vdc/10ohms = 1.2A (Saturated)

See my reasoning now?