On more than one instance, I have seen a mini-sac 5-hole nozzle stock in an intercooled 1st Gen. These trucks ran quite a bit better than others in stock trim with one less hole and the same hone size.

 

hhhmmm.... And you think that they will keep the performance edge when the wick is turned up... Now I see....

 

Nozzle type will play into the hp capability rather than the hole count.

 

hhmmm....

I'm excited....

 

Do yourself a favor next time before putting your own foot in your mouth. Contact a nozzle manufacturer, and check on the wait time to purchase even the minimum quantity of a nozzle that already is available. Let me save you the trouble, 2-8 months, you are skeptical because you don't have a clue.

 

FWIW . . . . .

Running a big-time ported head, HX35 Hybrid / HT3b twins w/2.5" plumbing, stock cam, small Banks intercooler, <65psig boost, stock/OEM 12mm VE with a 3200 gov spring, etc, non-lockup A518 trans, . . .

. . . and DDP4 extrude-honed (?) 5x.014" got me: 406HP & 840ft/lbs to the ground. They were good, clean burning injectors that didn't haze too much at idle.

(no2 only, no correction factor)


>Move forward in time<

Running a big-time ported head, HX35 Hybrid / HT3b twins w/3" plumbing, Hamilton 181/210 cam, big Hellman intercooler, 58psig boost, stock/OEM 12mm VE with a modified 3200 gov spring, etc, non-lockup A518 trans, . . .

. . . . . and 6x.016" EDMs gets me 447HP & 822ft/lbs to the ground. They don't smoke bad with the conservative twins spooled. I run a lot of injection advance and with such, they still haze pretty bad at idle.

(no2 only, no correction factor)




Granted, the cam and bigger IC have skewed the comparison.

- With the 5x.014" DDP4s as first shown, EGT's approached 1400*F (pre-turbo) at the top of the quarter IIRC .
- With the 6x.016", more air from the cam and IC, dinking with the governor spring more sees 1600*F at the top of the quarter. I need more air.


Also keep in mind, If I'm not mistaken, a good number of those high-horsepower folks run a 14mm H/R and a manual trans. I run a 12mm H/R and a non-lockup A518 trans . . . . 20% power loss?


I think the 6x16 are a step up albeit hazy at idle.

 

So a 6x0.016" is a step up from a 5x0.014", and you think that has more to do with the hone size or hole count?

 

Not at all. -> I know diddly-squat about the sciences involved in designing a good working injector.

But I do know that injectors are like most other engine bombs. Ya gotta give up something to get more power. In that shade of light the 6x16s will move more fuel in the injection event window, than the 5x014s will -> at wide open throttle.

BUT, those same bigger and more holes spew fuel rather than finely atomize the fuel like the smaller would . . . . with a lesser volume of fuel (less than WOT). With that, you've got less than optimum combustion.


Again, it's a trade off.

It would tickle me if someone could come up with a more powerful & cleaner injector.


Regarding the EDMs vs Extrude-honed, it's my understanding, that with a proper setup and design, the precision of the EDMed hole results in better atomization as compared to the equivalent extrude-honed.

I appreciate your taking the time to see what people are doing with these old heaps.

 

The set of 6x0.016" I did were very clean, little idle haze, and did not smoke much more than the stock 4x0.014". Both EDM and Extrude Hone are a good process to enlarge hone size, but one has never been proven to be better than the other.

 

Why not a 7 hole injector nozzle? with a smaller hole size, like 7x.014 you would have the advantage of better fuel atomization and be able to alleviate the pintle lift issue as mentioned earlier


or I could just be retarded.. but it seems to me fuel would atomize better with more smaller holes with our lower pressure pumps.

---AutoMerged DoublePost---

6x016 = .096 total opening
7x014 = .098 total opening
10x.010 = .100 total opening


which would atomize better? which would add more fuel?