7mm to 9mm adapter thickness

[Fnschlaud4620]

I am going home for spring break to install my injectors and work on my truck.

I got the 7mm to 9mm adapters I needed from PPE for $25.00 which I thougt was a good deal, Piers lists them for $50.00 anyway what should the thickness of the washer be on these.

I have not measured them but I saw a post on TDR and Greenleaf was talking about .040 on PODS needing to be .020

Is there anything to be gained by placing the injectors in farther than .020? How thin is too thin?

I was thinking I could turn them thinner in our lathe but I am not sure about how much or if I am just wasting time.

I was told when I bought them they are at a 145 deg spray angle.

Thank you
Fnschlaud4620

[Greenleaf]

You didn't mention what injector you will install...................

The POD injector needs the thin washer. I could measure one to let you know for sure. I don't know if it's .020 or not.

I also have the 7 to 9's but never measured them iether.

The narrow washer puts the nozzle tip closer to the bowl. Important for a injector like the POD, which is nothing more than a injector made by Delphi for CAV pumps. Not automotive application. The spray angle is less to be desired, so the thin washer will help. They pop at a higher pressure too, so they will retard the timing. Closer to the piston to assist the time a fraction

An automotive application injector will not help so much so, however it will serve to increse the timing a fraction.

That's about it in laymans terms. Did you need me to compare spray angles etc.etc.

[jer1]

Does this mean after the install of POD's I should bump my timing more? If so, how much? Thanks, Jer

[Fnschlaud4620]

The injectors were made by Powerparts engineering in Ohio, I was told they are 5x.014 7mm tips @145 deg spray angle.

My main concern is trying to get the spray angle into the bowl of the piston the best as I can.

I do not know what the spray angle is on a POD,
is 145 deg automotive or marine?

If I am understanding you correctly Greanleaf, than if 145deg is automotive than the thickness of the washer should not affect placement in the piston bowl, however it will affect timing. If I am still wrong please bear with me.

I will call and find out what the pop pressure is.

thank you
fnschlaud4620

[Greenleaf]

Pop pressure and washer thickness is timing related, yes. The spray angle? I don't know nuttn' 'bout that. I do know that some of the nozzles are more for auto and some are marine. Head gasket and piston used will differ among applications. I cannot say outside of this becasue I too have a limited knowledge when it comes to mixing in different nozzles. There is an endless amount it seems.

POD's are set for a different injection pump. You will have to advance the timing about 1/8" on the pump. There is a mm amount too. I'd have to look that up otherwise I'm shooting from the hip. I can't retain all this.

[RumbleFish]

I can't tell you any numbers, but the 7 to 9 adapters are definitely thicker than the thin washers.

[Cschafer]

The thickness of washer still matters even if it has the auto spray pattern. The thicker the washer the farther away from the piston the injector is. If the injector is farther away then it will have more room to spray outward. I think i've read that you should use the thinest washers available for most injectors. The adaptors don't give you any choice though so just run em.

[Fnschlaud4620]

my adapters are about .040 thick I am going to put them into the lathe and make them about.018 thick.

$25.00 expirement, Ill see what happens.

Thanks for the input!
Fnschlaud4620

[JLeonard]

my adapters are about .040 thick I am going to put them into the lathe and make them about.018 thick

Just be careful...remember that the 90 bend/form radius probably needs to be that thick to stay together.

[Fnschlaud4620]

I measured the thickness of the washer, it is .059 thick, I must be a bad guesser!

If I turn the washer down to .020 I believe there will still be plenty material to properly hold the adapter part.

by moving the injector down.040 using 144deg spray angle I will be moving the fuel in closer to the center of the piston by .084 or .042 on each side of the bowl.

I am going to use Catia to do computer stress ananysis of the adapter at .020 before I turn them. I will keep you informed.

Thanks guys!
fnschlaud4620

[JLeonard]

I measured the thickness of the washer, it is .059 thick

I recall mine being"about" 1/16 so that number makes sense to me.
Just remember that you'll be flattening them a scosh when you tighten the injectors...and hopefully there's clearance for the radius on the adapters. If you start with them at .020 and put even the slightest crease into them you might be in trouble.

I installed Bully Dog injectors and they advised leaving the thickness of the adapter as is. Must be right for them as I have no smoke at idle.

And by the way...the cleaning brush for my .357 was perfect to clean out the injector holes... which you need to do once the old injectors are out.

[dpuckett]

Stock IC washers are .090; the middle washers are .060, and the thin ones are .020, adaptors .060. That said, I noticed more smoke in Mom's with the .060s than with the .090s. So I run the .090s in hers. I put the .020s in mine after the thicker head gasket. I had been running .060s with the DDP1s, and it still hazed. It got better, but with the thicker gasket, and milling the head, I am about .030 closer to the piston than before. It is really trial and error to get good smoke and power from non stock injectors. Also, one must consider that the injector is offset about, what, 20-25deg from vertical? So you arent moving the tip straight down, but down and toward the intake side of the engine. That can change things as well.

Daniel

[jer1]

I've got a set of 7 to 9mm adapters that someone can have for the price of shipping. I was going to use them on my truck, but ended up getting a new head, so didn't need them. Greenleaf, if the pop pressure is so much higher on pod's, does this mean that with my timing bumped 1/8", I'm back to stock? I need 1/4" total to be back where I was with 1/8 and stock injectors? Thanks, Jer

[peytonmaterne]

I've got a set of 7 to 9mm adapters that someone can have for the price of shipping. I was going to use them on my truck, but ended up getting a new head, so didn't need them. Greenleaf, if the pop pressure is so much higher on pod's, does this mean that with my timing bumped 1/8", I'm back to stock? I need 1/4" total to be back where I was with 1/8 and stock injectors? Thanks, Jer

If you still have these I could really use them.