injector washers affect on timing

[ellis93]

Kinda curious what is the relation between the two. My thoughts are that it would increase it because of the tip being closer to the piston bowl.

A few more thoughts I've had was if you use them how much would it change the egts? Who's got them from where and what would be the best to use? What's the thinnest available?

[cmann250]

Thin ones are .020, thicker are .040, and I've heard that there is a .060 also. If it hazes with a .040, how bad would it be with a .060?

[RCCUMMINS89]

Well, it doesn't really affect timing. Becuase it doesn't matter where the injector tip is, it doesn't change the relation of where the piston is... meaning the piston is still at whatever btdc. However, it technically does because the fuel would get there .0000000000000000000000000000000000000000000000000000000000000000000001 millesecond faster.


With 7x10s... use the thinnest washers available... Good ol' CPP should have them and I bet that is what you have on yours now anyways.

[ellis93]

I don't have any problems with my injectors,what I do have is bubbles up the sides of them. Not many but enough to say there's a sealing issue,and while they're out I'm gonna pop test them again.

Anyone tried to make them thinner,like sanding them down thinner?

[PToombs]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

[RCCUMMINS89]

Just get some from Jamie at CPP

[ellis93]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

Well...its probly a turd idea but the injectors are a piece of cake to get out. I was just thinking if 20 is good how would .15 or 10 do.......?

[turboram]

i think the thinner that. 020 washers would have a hard time sealing because of not having any crush area. Unless you would have a way to emboss the thinner ones,but I doubt .005-.010 would make enough of a difference if any to be worth it

[DodgeFreak]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

perfectly flat table with sandpaper and water with a perfectly flat piece to hold the washer to sand it down...kinda like what they use for valve bodies in a trans shop might do it....I say give it a try.....or if its not perfect put some high temp rtv on both sides.... I'm kidding on that btw....

[Remps]

The 20s look so thin, it would seem one would have to put 3 or 4 on one injector to equal the thickness of the factory washer.

[ellis93]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

perfectly flat table with sandpaper and water with a perfectly flat piece to hold the washer to sand it down...kinda like what they use for valve bodies in a trans shop might do it....I say give it a try....

This is what I had on my mind

[BILTIT]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

perfectly flat table with sandpaper and water with a perfectly flat piece to hold the washer to sand it down...kinda like what they use for valve bodies in a trans shop might do it....I say give it a try.....or if its not perfect put some high temp rtv on both sides.... I'm kidding on that btw....

Good luck finding a perfectly flat table. When we did lapping/sanding of flat surfaces in a shop we used sheets of glass or special machined pieces of steel.

[RCCUMMINS89]

Holy ass sthi.... CPP wants 40 bucks for sealing washers? that's about 400,000% mark up.

Ok, get some from Cummins... last time I bought six they charged me a dollar something.

[ellis93]

Ellis, don't do it. No way you can sand them down and keep them even all the way around. 1 low spot and you have a leak.
Or, try it and let us know how it works! Somebody has to be the guinea pig for this siht.

perfectly flat table with sandpaper and water with a perfectly flat piece to hold the washer to sand it down...kinda like what they use for valve bodies in a trans shop might do it....I say give it a try.....or if its not perfect put some high temp rtv on both sides.... I'm kidding on that btw....

Good luck finding a perfectly flat table. When we did lapping/sanding of flat surfaces in a shop we used sheets of glass or special machined pieces of steel.

It's copper.....how precise does it need to be

[ellis93]

Holy ass sthi.... CPP wants 40 bucks for sealing washers? that's about 400,000% mark up.

Ok, get some from Cummins... last time I bought six they charged me a dollar something.

Yep,seen that almost lost sphincter control,:lol: