Big oil opinion from a ford enganeer....

[mschn99]

Originally Posted by drmiller100

"potentially less heat."

so, if we go on the premise that the same amount of actual fuel is injected no matter the HPOP oil pressure. that is premise one, and the programmer dudes can sure step up and tell me if this premise is wrong.

if we inject at 3000 psi HPOP, then we will get great atomization, adn more power in the combustion chamber.

if we inject at less then that, our atomization is less. this means that some of the fuel is still burning as it goes out past the exhaust valve.
It also means that some of the fuel never does get burned, hench the black smoke.

does all the fuel burned in teh combustion chamber result in less heat then most of the fuel burned by the time it gets out past the exhaust valve????

"Potentially." (smile!!!!)

my question was simply for clearifiction...because i think we can both agree the more fuel...the hotter the cylender temps.....and the less out the exaust...the lower the EGT's.........

[drmiller100]

Originally Posted by mschn99

my question was simply for clearifiction...because i think we can both agree the more fuel...the hotter the cylender temps.....and the less out the exaust...the lower the EGT's.........

sure, that makes sense to me.

but, wiht big oil, are you actually pumping MORE fuel into the engine?

I not know.

mebbe one of the big boys will explain it to us????

Hammer?

[mschn99]

Originally Posted by drmiller100

sure, that makes sense to me.

but, wiht big oil, are you actually pumping MORE fuel into the engine?

I not know.

mebbe one of the big boys will explain it to us????

Hammer?

but....if your theories are in fact correct......the fuel is burning efficiently...so your cylender temps should rise...and EGT's should fall....one of which is detrimental to the engine....one of which is benificial.......but as long as its all within a not overly done range...all should be good.....im just curious.........

[twildman]

Originally Posted by drmiller100

sure, that makes sense to me.

but, wiht big oil, are you actually pumping MORE fuel into the engine?

I not know.

mebbe one of the big boys will explain it to us????

Hammer?

No you are not injecting more fuel into the engine.

For instance, if I write a program to call for X amount of fuel with a pulsewidth of 3.4 ms, on a stock hpop truck, it will inject the called for fuel in that period of time. The problem you run into is this, as long as you keep your foot planted in the pulsewidth will remain constant, the hpop will drop, causing poorer and poorer atomization of the fuel the more it drops.

With a big oil truck, the same amount of fuel is delivered only the hpop doesn't drop, therefore the atomization stays up and the fuel is burned better. Make sense?

[mschn99]

Originally Posted by twildman

No you are not injecting more fuel into the engine.

For instance, if I write a program to call for X amount of fuel with a pulsewidth of 3.4 ms, on a stock hpop truck, it will inject the called for fuel in that period of time. The problem you run into is this, as long as you keep your foot planted in the pulsewidth will remain constant, the hpop will drop, causing poorer and poorer atomization of the fuel the more it drops.

With a big oil truck, the same amount of fuel is delivered only the hpop doesn't drop, therefore the atomization stays up and the fuel is burned better. Make sense?

but, with the drop from the HPOP.....there is less fuel....No????? at least at or close to WOT???....and, WOT is where the highest volume of fuel is injected....which means if it is burnable...it should lower EGT's and raise cylender temps....i have been going off of what you discussed with me in PM for my assumptions on my theory here...tell me where im wrong or right in your opinion.....

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Last edited by mschn99 : 02-10-2006 at 08:03 PM.

[overl0rd]

It would be the same amount of fuel, it's just how fast it comes out. More oil pressure = fuel gets pushed into the cylinder faster (at a higher pressure) and atomizes better.

[twildman]

Originally Posted by overl0rd

It would be the same amount of fuel, it's just how fast it comes out. More oil pressure = fuel gets pushed into the cylinder faster (at a higher pressure) and atomizes better.

Exactly, this is what makes the big oil system so nice, the power just doesn't let off.

[overl0rd]

The thing that still makes me wary, it does it at a sacrifice to the long term durability of the engine.

[mschn99]

Originally Posted by overl0rd

The thing that still makes me wary, it does it at a sacrifice to the long term durability of the engine.

thats my worry also.....does basically taking out part of the factory "de-tune" potentially shorten the motor life?????? i know these guys dont think so....but i wont be sold without a tried and true high milage motor for proof....Marc

[drmiller100]

ALL peformance upgrades take away long term viability from the engine to some extent, except perhaps big exhausts and an air filter that works.

if you don't want ANYTHING to detract from longevity, then stay away from this forum.

all that being said, I'd bet money that big oil with a good tune is a LOT easier on teh engine then teh 18k mod.