OptiMax JP

[XSive]

This is one of the most entertaining threads ever!! Keep it coming, I've pulled the muscles in my stomach from laughing so hard.

[150aintenuff]

actually octane IS a property of diesel fuels. However it usually isnt measured... Cetane is NOT the same thing as Octane!!! they are nearly opposite!!!

their ratings are based on the same principals.. no where did I say they were the same.. duh the chemicals are different.. cetane ratings are a diesels rating for resistance.. octain is a Gasolines rating for resistance.. pricipally speeking they "mean" the same thing.. never did I say they were..

Diesel may contain a small amount of the octane molecule and thus recieve a rating for it at some level of testing but does that then make it a WANTED or needed molocule... from what I know about diesel and its CHEMICAL properties is that it DOESNOT need the octaine molocule to be diesel and perform to the standards set by the manufacture.. chemically diesel is heavier, more dense and contains many more chemicals or polimars than gasoline.. it also encompasses a much broader chemical spectrum than that of gasoline..

I know my posts dont com off as THAT badly or unclearly written...

[jimmyb]

Cetane and octane ratings are basically the same thing

no where did I say they were the same.

huh???

[Markus]

huh???

Jim, don't get confused by all the silly stuff Nick posts.

Go back to work and design some new Optis instead. We like what we have seen so far.

[150aintenuff]

huh???

never mind.... i give up it seems that once again things got misread, pulled out of context and rehashed is a way that fit their argument....


is not CETANE RATINGS diesel fuels resistance to preignition knock

and is not OCTAINE RATINGS gasolines resistance o preignition knock or ping..


no where did I say the chemicals were the same, the ratings the same... the PRINCIPAL behind the ratings are BASICALLY the same when looked at by any persn on the street... diesel owners look for higher cetane ratings to ensure smoother and more consistant power, anlong with a more complete burn to ensure greater fuel mielege... and gasoline owners look to higher octane ratings to do the same basic function in their automobile, boat or what ever.. so correct me if im wrong WHERE in ANY of my statements did I say that the 2 chemicals WERE THE SAME... i was talking RATINGS.....

here let me dish it on a silver platter for ya

since you seem to be all knowing and my opinion gets me called an idiot WHICH REALLY PISSES ME OFF.... aswer me this... how can a 6 cylinder 2.7 liter motor consume MORE GPH of fuel at a lower RPM and produce LESS HP than a 3.0L motor that has LESS fuel efficient design by nature , yet produce 30+ more HP and do it burning LESS fuel , yet the 2.7 L meets emmissions standards but the 3.0 does not... funny less fuel.... less available atoms to generate harmfull chemicals and also closer to Stoiciometeric ratio... but what do I know. you all think Im an idiot...

[Stinky]

Tell me which two motors your refering to and I explain it to you. Outboards I hope.

[1BadAction]

since you seem to be all knowing and my opinion gets me called an idiot WHICH REALLY PISSES ME OFF....

you are the one that comes on here and post whores on every tech thread thinking you know it all. You are clueless, and I already know you are beyond help... Ya know why? because when you are told something THATS RIGHT, from guys that have forgotten more about engines than you will ever know, you do not have the capability to listen. Untill you can do that, everyone on the interweb will read your posts for a LAUGH.

now wheres my popcorn.

[150aintenuff]

what ever jim....

[150aintenuff]

stinky check yer pm

[Stinky]

since you seem to be all knowing and my opinion gets me called an idiot WHICH REALLY PISSES ME OFF.... aswer me this... how can a 6 cylinder 2.7 liter motor consume MORE GPH of fuel at a lower RPM and produce LESS HP than a 3.0L motor that has LESS fuel efficient design by nature , yet produce 30+ more HP and do it burning LESS fuel , yet the 2.7 L meets emmissions standards but the 3.0 does not... funny less fuel.... less available atoms to generate harmfull chemicals and also closer to Stoiciometeric ratio... but what do I know. you all think Im an idiot...

Thats an easy one. WOT GPH fuel consumption has absolutly nothing, and I mean absoluty nothing , zip, nada, nothing, to do with emissions rating.

Next question.

[150aintenuff]

yet more fuel and less air creates higher emmissions does it not.....

[Stinky]

yet more fuel and less air creates higher emmissions does it not.....

In a general sense, yes, total emissions may tend to go up depending on the type of motor. HC may go up, but NOx may go down. So total FEL at a givin point in the emissions cert may be a wash. So thats a very BAD generalization.

But again, even that has nothing to do with meeting emissions standards.
We were talking about meeting emissions standards. Stop changing the subject!!



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[150aintenuff]

so basically from what your saying is that regardless of "actual" emmissions output if an engine doesnt meet the design parameters the government sets it wont meet the standards EVEN IF it were tested cleaner than one that does.... or atleast thats how I see it...

[Stinky]

so basically from what your saying is that regardless of "actual" emmissions output if an engine doesnt meet the design parameters the government sets it wont meet the standards EVEN IF it were tested cleaner than one that does.... or atleast thats how I see it...

Weeeellllll, kinda, sorta. Your close but way to general.

Emissions certification is done a five set points. Those points are calculated using the middle of the operating range as published by the manufacturer.

Mode 1 is WOT at mid op range, mode 5 is idle and the other three are calculated.

There are also families set up by the EPA that lump like motors together according to displacement and HP.

http://a257.g.akamaitech.net/7/257/2...0cfr94.304.htm

http://www.setonresourcecenter.com/C...FR/P91_014.HTM

The emissions cert is a very complicated and involved process (hey, its the government). So to make a general statement about emissions ratings and fuel consumption is non-productive.

Case in point. E-techs are all 3 star rated. Yama and Opti are mostly 2 star.
Yet the E-tech 3 star motors consitantly show the worst fuel consumption in independant tests. (Mercury 225 Pro XS is a shining exception) Food for thought.

Do a little reading in the links and get back to me.



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[150aintenuff]

will do ... but it definatly gives me One more reason to hate the government...