Delivery Valve Flow Test

Smokem

Smokem

Turbler
Joined
May 10, 2006
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913 12mm P7100, 1000RPM pump speed ~ 20mm rack ~ 5x0.014" test nozzle.

#1 - 181/373cc's - 191/436cc's
#2 - 181/370cc's - Comp/522cc's stock holder
#3 - 181/366cc's - Comp/489cc's billet 0.093" holder
#4 - 181/366cc's - 043/394cc's
#5 - 181/366cc's - Modified 043/413cc's
 
Are the Competition delivery valves shown SDX's delivery valves or Full cuts?
 
Smokem said:
913 12mm P7100, 1000RPM pump speed ~ 20mm rack ~ 5x0.014" test nozzle.

#1 - 181/373cc's - 191/436cc's
#2 - 181/370cc's - Comp/522cc's stock holder
#3 - 181/366cc's - Comp/489cc's billet 0.093" holder
#4 - 181/366cc's - 043/394cc's
#5 - 181/366cc's - Modified 043/413cc's
Click to expand...


Very interesting to see the difference in flow gains between your pump and mine. Much higher percentage gain between the 181's and the modded 131's on your pump.
 
Do you have a picture and/or dimensions of the 043 DV's?

Those Comp DV's are impressive, have you ever compared them side by side with full cuts? (I'll bet they are close in overall flow, but probably different driving characteristics?)
 
Big Blue24 said:
Do you have a picture and/or dimensions of the 043 DV's?

Those Comp DV's are impressive, have you ever compared them side by side with full cuts? (I'll bet they are close in overall flow, but probably different driving characteristics?)
Click to expand...
That's^ how he explained them to me before he cut mine.
 
did anyone else notice the drop in cc's when ran with a .093 dv holder or just me?
 
Wonder the .093 holder difference on a 13mm. I'd guess it'd go up since it's higher pressure.

What test lines did you use?
 
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With a 5x20 injector I went from not being able to pull enough fuel out of my benched 180 pump with around 12mm rack (a guess based on a big nose fuel plate all the way to the rear) with the 131 comp style delivery valves to not having enough fuel and loosing around 100 hp with 181s and 21mm of rack. All the above with a 64 single. These results seem consistent with my first hand experience with these delivery valves.
 
Smokem said:
913 12mm P7100, 1000RPM pump speed ~ 20mm rack ~ 5x0.014" test nozzle.

#1 - 181/373cc's - 191/436cc's
#2 - 181/370cc's - Comp/522cc's stock holder
#3 - 181/366cc's - Comp/489cc's billet 0.093" holder
#4 - 181/366cc's - 043/394cc's
#5 - 181/366cc's - Modified 043/413cc's
Click to expand...
Interesting, are you able to somehow check static vs dynamic timing of the different combos while on the stand? Have you checked full cuts, 022, or 8mm 024's on a stand to see how they compare?

How do the Comps compare to a full cut driveability wise, would they only benefit a truck with a lot of air(whether it be a large set of twins, or nitrous)?

RAMICATOR said:
did anyone else notice the drop in cc's when ran with a .093 dv holder or just me?
Click to expand...
I would assume the difference between the stock holder vs .093" holder is related to injector duration, I'd also imagine that the dynamic timing is retarded with the .093" holder vs stock.
 
^ Brett, the competition valves drive better than 191s and 022s I've had in my truck yet fuel night and day harder then either of the previously mentioned. As i've said time and time again the only down side is they lope a bit more than other sets i've had. Not enough of a downside to keep me from running them.

Regarding timing have you considered the timing light being triggered off the closing event and not the opening event? This would explain why timing goes down as rpms rise via delayed closing of the injector as rpms rise and would explain why bigger delivery valves often seem to show a decrease in timing. I have not tried a light myself however due to the lack of accurate answer given to my question via searching previous timing light threads. I suppose it is also possible the event really does retard when moving up in the rpms away from idle which would explain why you guys have success at higher than in the bowl timing. To be honest I have had my timing as high as 27-28 and it was the best the truck ever drove or ran part throttle on the street (i.e. no part throttle smoke) with the previous 5x13 injectors and comp delivery valves.
 
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BrettWINspeed said:
How do the Comps compare to a full cut driveability wise, would they only benefit a truck with a lot of air(whether it be a large set of twins, or nitrous)?
Click to expand...

NickTF said:
With a 5x20 injector I went from not being able to pull enough fuel out of my benched 180 pump with around 12mm rack (a guess based on a big nose fuel plate all the way to the rear) with the 131 comp style delivery valves to not having enough fuel and loosing around 100 hp with 181s and 21mm of rack. All the above with a 64 single. These results seem consistent with my first hand experience with these delivery valves.
Click to expand...

I made the switch from 5x13s and 5x20s also when going slower. My videos are up and you can see for yourself!
 
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