Injectors???
 

96 Cummings. What's a good injector for it? S300 64/71/14 turbo, no fuel plate, 2095 Mack plug, head studs and head work will be done as well. In the future I'm putting dv's, and 4gsk. Thanks


Brandon

i'd say 5x14s would probably be good for that turbo. do yourself a favor n get the 4k gov springs now.

n please please please dont put a G in Cummins.

Does your truck have a 5 speed or is it a auto? Ifs it a auto the 64mm turbo will be laggy and hot until the turbo lights especially with a stock cam in it etc. If its a manual you will be better off with that size turbo. I would look more into a 62 if you have a auto IMO. Also if you have a auto I would suggest a good convertor and a valve body to help out the trans ends of things

Injectors???
 

Lol my phone does auto spell in the cummins g. It's a 5 speed manual trans. I already have that turbo on it. 64/71/14 and it's laggy already so idk. And break down the 5x14 for me?


Brandon

5x14 would be about a 140-150 HP injector.. They should be a 5 hole nozzle design with 0.014" holes in the nozzles

Injectors???
 

10-4


Brandon

SDX makes a set of 5x.014's for about $500, and they're dang good injectors from what I hear.

yes they are, ran there stuff in my truck all last year and will again this year

Thanks guys, Dave can't wait to see what she'll do this year. :c:

I'm putting 7 hole injectors on my truck. I hear that they light turbos faster, but not quite the raw power that an equivalent 5 hole.

Hopefully know more next week when the get here.

i would go with the 5x14 thats what im putting in my truck had them in my old truck there great and i had a ats 3000 turbo and the injectors made it light up a lot faster

im running the sdx 7 holes and love them

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my 7x9s are around 100hp and are super clean

I'm going to 7x11's. I have a buddy with 7x10's (real close to 5x14's) and he says the smoke is way down, and turbo spools faster than his old 5x14's And he picked up 1 hp on the dyno, but lost 25 lb/ft of torque...

5x.014 is a bigger injector than a 7x.010 or a 7x.011, thats why your buddys smoke is way down and spools his charger faster.

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a 7x.010 is just a tad smaller than a 5x.012

Yah, but my buddy has dyno sheets from the same day, on the same dyno to show that horsepower stayed even betwixt them.

this would tell me that either he has a fuel supply issue, need to upgrade some things on his p pump, or he doesn't have the airflow for the bigger injectors.

Did you consider that maybe a cylindrical blind-hole nozzle may be superior to a vco nozzle? He is not the only one that has dyno results to prove this. People look into cross sectional area way to much. Look at a micro blind nozzle with the same hole count as a vco nozzle. They have the exact same cross sectional area but will not make the same power.

I agree nozzle type is part of it and yes to be honest I did not even think to ask if the nozzle type changed. But who's to say the 5x.014 were not a cylindrical blind-hole nozzle?

Your saying a vco 5x.014 VCO will be out flowed by a 7x.010 blind hole dispite the massive difference in cross sectional area? I'll agree with the same size vco against a blind hole statement but not so sure on the other.

The dyno mentioned earlier was a 5x.014" vco nozzle vs a 7x.010" cylindrical blind hole, both with stock pintles. They do not offer a 5 hole cylindrical blind nozzle, at least not one that is not custom machined.

I never said a 7x.010" will outflow a 5x.014". The 7x.010" will flow less but it does seem to make decent power, despite being smaller. Some testing has also been done with a set of DDP4's vs SDX 5x.014" vco with lift vs 7x.012" w/out lift. The 7 hole injectors had less haze and had a significant increase in power vs both 5x.014" nozzles. There is still much more testing to be done with various 7 hole nozzles.

Injectors???
 

I have to go back to stock now. I dun spent too much to quick!!!


Brandon

TThe guys at Sdx said the 7x9s were about 100hp and the 5x12s were 90

I'm still not sold on the 7 hole injectors being better than the 5 hole. the test you mentioned about the ddp vs the sdx vs the 7 hole test really doesnt mean much ... sounds more like a sales pitch to me

You can call it whatever you want. Im just stating what has been done so far.

Dynoing injectors back to back is almost a complete waste, especially when all three sets are different nozzle type and cone angle. The 7-hole Denso nozzles do work and have their place, but for big hp I don't see anything taking place of the 5-hole nozzles.

Injectors???
 

Can u put a 12v cummins motor back in a 96 truck with the head and valve covers on or do you have to jack the cab up for it to fit. I took it out with the head off no problem but a tight fit.


Brandon

kinda off topic ... but yes you can put the motor back in with the head on, the valve cover have to be off tho. its a pain but you can do it

What about for a non vco nozzle larger than a 5x18 since the sac volume is larger?

I never cut one apart to see just how large the internal volume is, if it were 5-hole I would have. There are large sac 5-hole nozzles that are used from a few larger Cummins applications, but the intermediate disks must be modified to use them.

The one I cut apart was a cylindrical blind-hole design and the sac diameter is about .010" wider on the 7 hole nozzle then the 5 hole micro blind, so I had thought about using it for the larger injectors since the micro blind 5 holes have the smaller volume.

What type of modifying is done to the intermediate disks? I am trying to find some sac nozzles to use in the larger pulling applications so I am really interested in what you are comming up with. Im guessing this is the stuff you were talking about on the phone when you mentioned that no one has really done before.

It's an 8.3L pencil nozzle, pain in the you know what, I don't like doing them since the alignment pins must be removed on the nozzle side of the disk. I am having a few nozzles printed this month, hopefully making it into production by late spring, been a long time coming.

To Smokem, sorry I'm off topic but several of us here in Newton, Iowa are in need of a good diesel shop. We've got two 7.3 Fords and a 98 12V needing work. Seen you were an Iowan too and really seem to know your stuff. Any reccomendations would be appriciated. Thanks, Bill IversonConstruction@hotmail.com

what is vco injectors and blind hole injectos???:humm:

As a side note, I should have my 7x.011's in by wednesday or thursday, then I can report on their performance.

Can't hardly wait!!!! :D
:rocking: