Anybody have real proof on the same dyno that there are any gains on higher cetane levels of addative?

 

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tristan:

Yes, I have seen a gain with pure cetane added to the fuel, but it is not alot.
I never saw ANY gain from using any additive such as "Power Service" with "Cetane Added" but with pure cetane, yes. If you decide to do it, be sure you add some type of aftermarket "lubricity additive" to the fuel with the cetane as cetane has a "drying effect" on the internal parts. I use "Stanadyne Lubricity Formula" and have never had a problem.

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John_P

 

John_P

I just want to clarify if you are referring to pure Cetane or Acetone?

Additives that improve the Cetane rating "should" improve power with the same volume of fuel. I read an article that said the fuel burn efficiency will plateau at about a CN of 50.

Here is the article I am referring to:

http://www.turbodieselregister.com/m...and_diesel.htm

 

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dj:

Yes Sir, I know that cetane is a measurement of the combustion quality of diesel fuel. But, you can also buy cetane to add to diesel fuel and I know this because I have two gallons in my garage and I use it "straight up" in my 1996 Dodge CTD 12 valve (see signature below) to RAISE that cetane number up and get better combustion and power. And,.....it works!

Thanks for your input though.

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John_P

 

I was correcting myself (And my post) as you were typing. I had a chance to do a little research and found an article about exactly what you were talking about.

Thank you!

 

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dj:

No problem Sir.

That is a good article in the link you posted from TDR though. I had seen that before. One thing alot of people don't realize is the "cetane ratings" seen on diesel pumps all across the U.S. IMHO are NOT accurate. I know what the federal law says about the ratings, but in N.C. the Dept of Weights and Measurements have some done some "random" testing on the cetane "rating" of pump #2 diesel fuel and have found alot of stations barely making a cetane rating of #40 even though that pump says it should be
#45. I can tell you that when you add straight cetane to the #2 pump diesel fuel you can IMMEDIATELY feel a difference in the way the truck runs.

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John_P

 

I seen David Dunbar run a dyno test with "Diesel Power" additive and it increased
the numbers by a small percentage. For a big power truck that could add quite a bit of horsepower.

Today's diesel fuel is watered down crap if you ask me.

You can do much better if you mix up your own devils brew for competition purposes...

Get yourself a 5 gallon container....Add 32oz of PS or Diesel Power, a half quart of clean engine oil, a quart of Kerosene, half a bottle of clean ATF Fluid and fill the rest with some good ole #2 Diesel mix it up....
You have just made yourself some competition diesel fuel.

 

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Good point Justin! Thanks for your input here.

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John_P

 

so let's clarify then are alot of the numbers posted as "#2 only runs" with competition blend do you suppose. I mean on a 650-700 hp truck like mine do you think its possible to gain 20-30 hp?

Do you think it would be any harder on injectors or the rest of the fuel system to run a full gallon thru the truck? And thanks Justin an fellas for you inputs

 

Well I can say that most of the big competitors are not running straight pump diesel. I know for a fact most tractor pullers run additives or run their own version of diesel fuel or spring for "Pure Purple" high performance diesel fuel.

I can't really speak for others as to their #2 runs. But I can tell you that most of the time when I pull or when I am dynoing I run an additive overdose (ie like a full bottle of diesel power to a 5 gallon bucket of fuel).

I have no ill effects to report with a heavy dose of additive. However if you are worried you can always run your favorite lubricating agent to counter the "cetane" booster that is often somewhat dry.

As far as whether you will gain power or not I don't know. But I think its worth a try. It's always good to figure out your own concoction or blend and go try it out on the street.
Usually higher EGT's are a sign of the engine making more power with the same amount of fuel.

I remember back in the day Gene Mohney "Sledpuller" used to run almost a whole bottle of cetane boost with a small amount of fuel in his pulling truck. The results were a flame from his stack (behind the cab).

 

Yep the flame, although cool lookin, maybe a lil hotter than im lookin for but I will certainly be tryin some different mixtures.

 

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tristan:

I agree with what Justin has already told you.

FYI, I never saw a 20-30 H.P. gain with my truck as you mentioned but did see between 8-10 H.P. RWHP on the dyno depending on how much cetane I added to the #2 diesel fuel. As I said in my earlier post, it was not alot, but it all helps when you are trying to make more power.

Again, let me caution you or anyone else that is planning on running "pure cetane" with your #2 diesel fuel, you need to add a "lubricity additive" when you pour the cetane in the fuel and I would say this is even more critical with the CR trucks! Cetane has a "drying effect" on all internal fuel parts and without it you can do damage, so add a "lubricity additive" as both Justin and I have pointed out.

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John_P

 

So does the atf and oil and other addatives lower the cetane rating or hurt the burn process of the fuel. Would those type of things counter act against say water/meth/nitrous/propane?