Fuel Additives ????
 

Has anyone ever done a dyno pull on a merc. motor running an additive in the fuel? I keep hearing people talking about extra HP. but is it true? Is there proof?
MD

Thats a good question Randy.How about higher octane fuel in a 525 efi? Will it increase hp?

I wanted to buy some Octane Boost to put in my fuel tank in the spring and give the gas some boost but the guy in the store said it wouldn't do anything to improve it. I don't know, maybe a test from a racing shop would settle it with some data.

Higher octane fuel alone will not necessarily increase hp. The engine compression ratio has to be high and the timing adjusted to maximize the increased octane.

fuel oxigenators. not what you think but it does work. several ways to do it. they all work.

High octane fuel will give no noticeable effect to your performance ,We used to run toluene ? not sure how to spell it ,as an Octane booster at about 25% when we couldnt get Av gas .

Here's the stuff.

http://www.powermist.com/home.html

:(

The lower the octane the faster the fuel burn, the higher the octane the slower the burn. So low compression motors need a faster burning fuel. The higher the compression the slower the burn for power

Has anyone out there ever actually dynoed a Merc 525 with different fuel supply's? I know Merc has said higher octane wont do anything for you but what about other additives? The dyno is the only real measure to validate this question.
MD

I had a long conversation with the guy from SUNOCO Race fuels a couple of times.....and he said they could do something with a additive that would incress the profermance in the 525..I did not go into what they would do other then he said they could make a race fuel for the 525's...one of my issues was would it effect the 525 in any bad ways....I think he even said he called Mercury on this....he called me a few times to discuss it...but with us running at 93.5....I seen no reason to try to get anymore out of my engines....

GINO,,,,,,,,,,,,,,,,,you broke out ! 92 is the #. LOL

That is exactly correct. I used to race smaller engines, Watercraft, and the fuel ratios and octane ratings had to be exact or we blew up. We drained the tank if it sat more than a few days. I used to store my race jugs in a cooler with ice on it, so it didnt loose octane. Race fuel is basically a way to cool the motor, unless you are running something like tolene or oxygen. We also use to add phenyl oxide, which is similiar to nitrous. There are a lot of folks who can blend fuel to your specific set- up. If the compression ratio is not there, and the timing is not there-more octane and some times oxygen will burn to slow and you will detonate. I know it doesn't make a whole lot of sense. Think of it as burning cleaner and smoother- slower and longer. A lot of race fuels have a lot of lead, therefore lubricate. That will save the motor. I know the ratios we are running, and I dont see any benefit of running race fuel. That is a very elementary explanation. Hope it helps.


Cowboy
Crazy Chicken Crew

I know it puts me 1 1/2 mph below OPA and 1 1/2 mph above SBI.....but we have a easy fix with SBI.....if its humid and hot....she will only do 91.5 to 92....if not, we just add a extra 30 gallons of fuel.....

See ya next week.....

Randy, there are certain different additives you can put in the fuel to add more hp but they are definently not legal in our race boats. You got something up your sleeve for next year??:eek:
Jen

Yeh my fist if I catch someone using them in SVL.:drink:
MD

:angry-smiley-038:

:mad::angry-smiley-038::angry-smiley-038::angry-smiley-038:

THE DIFFERENCE BETWEEN 92oct and 87oct is 7hp in a 525. more oct=less btu.

oxy fuel is about 30-40hp...on a 525...no joke! but have at it 15-20 bucks a gallon.

PO propylene oxide, Bad stuff cant be found in fuel after the race it evaporates.

we used to run against a certain competitor who ran P.O. it smelled like the stuff they run in rc cars/planes. The only way to detect it is with chromatography "sniffers"

i love the smell:evilb:

Burning Jet fuel smells better :D:D

True !:ernaehrung004:

IT DOES...but, man, i sure do love oxy fuels...the elf stuff from europe we ran in super bike was crazy smelling too.

No but you can smell it.

Since its a oxigenator,does it have something in it to compensate for the fuel? or recalibrate the fuel map.

I would be scared of it going lean.

I spoke to the manufacture of a fuel additive product and he said he sold the product to offshore racers and they were happy with it. So I purchased and ran it in my pleasure boat outboard and it was amazing. I gained acceleration but the rev limiters kept the same top end speed.


Since running the product I put another 25hours on my motors and they are fine so it appears to be as reliable as the manufacture claims.


A very cheap horsepower alternative. Certainly not the place for racers engaged in true sportsmanship but to some teams winning at all costs is thier MO.


Dan

I think the ecm"s are calibrated for pump gas your gonna have to throw them in a box and pull from the hat.

higher octane in a 525 will also turn your transom black.

??

??

388:
injector(eec/ecu...) calibrations are done based on fuel weight(SG), not volume.

your fuel choice at the available pumps can be as much as 10hp delta.

being consistant in your fuel choices is very key.