EFILive MO Powa
- Thread starter Muff
- Start date
Kory and steve what do you think would make pawrrrr.
1800 pulse at 25,500
Or
1700 pulse at 27,500
1800 pulse at 25,500
Or
1700 pulse at 27,500
Are you asking which one will make power on the dyno or be faster at the track? Because that's two different answers.
So our HPCR trucks cant make the same power as the old mechanical (ppump) trucks because our cp3 cannot come close to moving the volume of fuel that say, a worked P7100 can. Correct? Okay.
What if we focused less on rail pressure and more on volume?
P-pumps make what? Like 15,000-18,000 psi in the injector lines? What if someone could design a common rail injector to work at 17,000 psi of rail pressure?
Wouldn't that allow a high pressure system to run a MUCH larger injector and a much greater overall volume of fuel?
What if we focused less on rail pressure and more on volume?
P-pumps make what? Like 15,000-18,000 psi in the injector lines? What if someone could design a common rail injector to work at 17,000 psi of rail pressure?
Wouldn't that allow a high pressure system to run a MUCH larger injector and a much greater overall volume of fuel?
Are p pumps really that high? I thought they injected at about 4000 psi. Maybe I'm getting the injector pop off pressure and the actual injection pressure mixed up.
I would seeing the rail itself being an issue since your pushing all the fuel through 1 line instead of individual injector lines like the ppump. When your fuel line size is limited the only way to get more volume is more pressure to a certain point.
You would probably see a couple things on the dyno doing this. On a high pulse, low. Pressure tune, your peak hp might be higher but the hp curve will drop sooner and not be as smooth. Visa versa with a smaller pulse, higher pressure.
On the track before I built the motor, 2800us tune with 24k rail netted me a 13.0. 3200us with 20k rail netted me a 13.2 and it stayed that way all night.
The biggest thing was the feel in power as it dropped off in the upper R's. With the dual pumps on and rail holding at commanded, power stays consistant all the way through.
On the track before I built the motor, 2800us tune with 24k rail netted me a 13.0. 3200us with 20k rail netted me a 13.2 and it stayed that way all night.
The biggest thing was the feel in power as it dropped off in the upper R's. With the dual pumps on and rail holding at commanded, power stays consistant all the way through.
This was on my LMM back in the day. Stock injector, turbo, CP3.
I was running 12.8s inconsistent. Duramax tuner tunes 3200 pulse dropping rail to 24,xxx.
I dropped pulse to 3100 didn't change anything else. Went 12.7 rail was 25,xxx. Dropped pulse to 3000 didn't change anything else. Went 12.6's very consistent holding 26,107.
I always like to be able to hold rail to what I'm commanding then back it down 25us depending on injector size to make sure my truck stays consistent.
My truck would run 12.56-12.63 same track different days around 80*
I was running 12.8s inconsistent. Duramax tuner tunes 3200 pulse dropping rail to 24,xxx.
I dropped pulse to 3100 didn't change anything else. Went 12.7 rail was 25,xxx. Dropped pulse to 3000 didn't change anything else. Went 12.6's very consistent holding 26,107.
I always like to be able to hold rail to what I'm commanding then back it down 25us depending on injector size to make sure my truck stays consistent.
My truck would run 12.56-12.63 same track different days around 80*
No one runs huge injectors is why you don't see commons making huge power. No, I mean... REALLY huge injectors! Put those in with the high pressure and voila! Powaaa
I have gone faster with the higher pressure version. You will always go faster with higher pressure than stock
I have gone faster with the higher pressure version. You will always go faster with higher pressure than stock
Thanks kory.
What cp3 combo can move the same amount of fuel as a 13mm 900cc pump? And do it at 20,000-26,000psi ?
900 cc should be plenty of fuel for about 2000 horse. General rule of thumb is that 1cc of fuel has the potential for about 2 horse power.
Only problem now is that a 13mm pump flowing 900cc's of fuel and say a massive set of 5x.032" injectors to go along with it will be near impossible to drive other than straight shot down either the track or sled pull course.
Get 2000 horse worth of fuel and a massive set of injectors in a duramax and it's still somewhat streetable.
Oh I agree, common rails are the way to go. It appears like big enough injectors are finally becoming available to compete with the mechanical guys.
Nastiest set of vp or 12 valve injectors might set you back $600 for all 6...nasty set of exergy 250% injectors will set you back about $6000:rofl:
I guess there is a trade off...sigma p7100 pump...$10,000...set of injectors to go along with it...about $1000
Set of dual stroker exergy pumps and an install kit for a dmax.. $5000+...massive set of exergy injectors... $5000+
I guess there is a trade off...sigma p7100 pump...$10,000...set of injectors to go along with it...about $1000
Set of dual stroker exergy pumps and an install kit for a dmax.. $5000+...massive set of exergy injectors... $5000+
I'm sorry, all I could read in your post was how we should all be building gas engines :roflmao: