7x10 vs. 5x12 - SAC @ 59LPM

[ellis93]

Been upwards of mid 90s the last few days and they don't haze a lick.

A little bit of this haze might have something to do with my engine and most other 1st gens being such high mileage rigs.


I do have to be honest in the fact that I simply enjoy the way these injectors drive though. I can lug the dog crap out of this thing and it rolls on with no issues. I just have a hard time without the performance end.

Well what's the verdict on this......

That last opinion sounds like it's changed some.

[RCCUMMINS89]

If it's above about 80 degrees outside they don't haze. If it's any colder they haze, colder the worse (this is at full operating temperatures of course)


However, keep in mind that I am also comparing these to other injectors that I have had in my truck.

Bottom line is the 7 hole sticks hazes worse than any proper spray angled injector that I have ever had.

Now............to some it might not be enough to care about, others will hate it. I don't like a hazing injector because when I'm hunting up in the mountains in cold weather. A mild "street haze" turns into a horrible smoke show that makes it unbearable to drive.

[brandonmgreer]

ok. good to know. I just got a 92, bone stock, never turned up. gonna go a little mild with it to see what I can do for the best mix of power and economy... any suggestions RC?

I have a 4x4 p-pump to get stupid with:-)

[brandonmgreer]

Sea level and hot 9 months out of the year too! We have two seasons... Hot and HOTTER

[RCCUMMINS89]

I'd probably recommend 7x10s in your case. Which I do carry 7x10 (genuine bosch, runs $500).

However, not knowing everything..............I may think diff. PM me when you want to talk about it.

[RCCUMMINS89]

If it's above about 80 degrees outside they don't haze. If it's any colder they haze, colder the worse (this is at full operating temperatures of course)


However, keep in mind that I am also comparing these to other injectors that I have had in my truck.

Bottom line is the 7 hole sticks hazes worse than any proper spray angled injector that I have ever had.

Now............to some it might not be enough to care about, others will hate it. I don't like a hazing injector because when I'm hunting up in the mountains in cold weather. A mild "street haze" turns into a horrible smoke show that makes it unbearable to drive.

Saying the above............I don't want it to come across as I hate 7 hole injectors. The ONLY reason I don't run them...........my truck is in a situation 9 months out of the year that a mild haze turns ugly. The other reason is, I'm trying to make BIG power yet. Even though I'm about to say the heck with it.

[brandonmgreer]

Thank you. I will pm you as soon as I have enough posts to do so...

[ellis93]

If it's above about 80 degrees outside they don't haze. If it's any colder they haze, colder the worse (this is at full operating temperatures of course)


However, keep in mind that I am also comparing these to other injectors that I have had in my truck.

Bottom line is the 7 hole sticks hazes worse than any proper spray angled injector that I have ever had.

Now............to some it might not be enough to care about, others will hate it. I don't like a hazing injector because when I'm hunting up in the mountains in cold weather. A mild "street haze" turns into a horrible smoke show that makes it unbearable to drive.

I don't car for haze myself.
I still stand by what I said before tho,they didn't haze when I first installed mine. Mine started that when I pumped the fuel system full of trashy fuel. From there it's been a down hill run for my truck. New injectors cut some smoke,lessened haze, timing helped but it still ain't right. Now there's evidence that the pumps taking a dump.

[RCCUMMINS89]

And I agree..........and stand by my previous statement that they may not haze in all vehicles.

They hazed worse than 5 holers in my truck. BUT my mess probably wouldn't haze if everything was fresh.

Also...........I live in somewhat rainy climate that is below 70 9 months out of the year. When it rains my mess hazes with everything (less air).


And lastly...........they DO NOT HAZE BECAUSE OF THE 7 HOLES they haze because of the larger SAC volume than our traditional 5 holers we use. They do lack the wot high cylinder pressure (30psi +) power though because of 7 holes and a ve pump. But they definitely make up for their power down low.


I also had no smoke issues except at idle.

[brandonmgreer]

i really appreciate the input guys. Doing some research into what I'm gonna use. The right combination of parts is never a bad place to start!

[Alec]

Hey RCC, how is your ksb set up? And did it have any effect that you could notice on the 7x10's hazing problem? I was just reading this article https://e-reports-ext.llnl.gov/pdf/235419.pdf and it made me think that retarding the timing at idle speeds with the 7 hole injectors might help with idle haze because you would be initiating injection into hotter air, and maybe form fewer soot precursors as the short burn started . . . I am probably totally misguided, but that's why I'm asking .

Thanks,

Alec

[BC847]

Thank you. I will pm you as soon as I have enough posts to do so...

You are well past that point. Are you not able to send PMs?

[RCCUMMINS89]

Hey RCC, how is your ksb set up? And did it have any effect that you could notice on the 7x10's hazing problem? I was just reading this article https://e-reports-ext.llnl.gov/pdf/235419.pdf and it made me think that retarding the timing at idle speeds with the 7 hole injectors might help with idle haze because you would be initiating injection into hotter air, and maybe form fewer soot precursors as the short burn started . . . I am probably totally misguided, but that's why I'm asking .

Thanks,

Alec

Sorry, I never noticed this post.

My ksb is deleted. I messed with the timing from near stock all the way up to way over advanced...didn't change the idle haze.

[Remps]

A little off topic, but did you ever test those injectors with increased lift?

[RCCUMMINS89]

The ones I have in now you mean? The current ones in my truck are the 77lpm sticks that we did a mild .05 of lift on....... at first I thought I noticed an increase in fuel, but later I don't think it was any different. But we also increased the pop from 250 to 255 bar, which might have just made things even again.