Stock Nozzle hole count and size

2007 5.9

2007 5.9

West Coast Dyno Modifier
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Jan 14, 2008
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Who knows the hole size for stock 305 trucks and the 325 trucks?

I am sure the 325hp are 5-hole but 5x.0xx??

And the 305hp are 7-hole but 7x.xx??

TIA
 
Stock hole count is 5 in the 04.5 and up engines. Diameter is .008268

Stock hole count is 8 in the 03-04 engines. Diameter is .006299"
 
So how is a .01025" hole nozzle in a 12V considered a 215HP nozzle?

A 45% over stock CR nozzle is roughly 90HP

This means the hole diameter in a 04.5-07 90HP nozzles is roughly .0119886"

This also means the hole diameter in an 03-04 90HP nozzle is roughly .00913355".....but with 8 holes on this nozzle design
 
You are confusing flow with hole size. 45% over means 45% more flow at tested pressure, not a 45% larger hole.


D45 said:
So how is a .01025" hole nozzle in a 12V considered a 215HP nozzle?

A 45% over stock CR nozzle is roughly 90HP

This means the hole diameter in a 04.5-07 90HP nozzles is roughly .0119886"

This also means the hole diameter in an 03-04 90HP nozzle is roughly .00913355".....but with 8 holes on this nozzle design
Click to expand...
 
Im no expert but i think its because Because you are comparing it to much higher pressures and more then one injection event.
 
Also in a 12v hp is changed with added lift. Like I say I'm not an expert but just the few things that come to mind
 
Nozzle flow is typically based on the nozzle alone, neither needle lift nor multiple injection events would be of concern. A 574 12v nozzle in stock form 5x0.010" flows ~ 1.825LPM, that is ~ 80% larger than the stock 1058 and 1309 nozzle which flow ~ 1.080LPM and 1.114LPM accordingly.
 
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But wouldn't it be different when he starting talking abouT the 90hp this and 90 hp that and what size the holes are? I understand a hole of a certain size will only flow so much.
 
CR requires far less flow to create the same net hp as a mechanical system.
 
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