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kapla
Grand Poobah Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Posted: September-30-2008 at 9:40pm |
I was looking in corvette forum wich i'm a member in cause apart from the boat i own a 1973 vette. There was this thread about using regular or premium. I wanted to know which type of fuel you use, what type of fuel is the correct for my boat (1992 sn 351w stock with protech ign). I've always used premium (95+ octanes here) but had always the doubt of what would happen if used on what we call here "comun" (regular) of 85 octanes? So opinions are apreciated!!!
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<a href="">1992 ski nautique
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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I use either...can't really tell a difference. But there are guys here (TRBenj and others) that know way more than me.
john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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I found "super" 93-95oct is what works better with my boat, but of course we have set the points and carb to work with that.
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Brktracer
Senior Member Joined: December-20-2007 Location: South Carolina Status: Offline Points: 387 |
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If you have 9:1 compression or less, like a stock engine, it should run just as good on 87, maybe less.
I don't know what compression ratio the newer boats have nor do I know what the owners manual recommends. I'm sure others here will know. If the engine is stock I would stick with the owners manual recommendations. As far as your '73 vette goes, again it depends on how the engine was built. I've run 10.5:1 w/93 octane in a SBC for over 1,000 passes on the strip and thousands of street miles with no problems. This one had cams ranging from 224 - 236 @.050". I tried 110 race gas with this combo and it didn't make any difference. My boat is 9:1 and I can't tell any difference between 87 and 93 so I run it on 87. Mainly because I'm cheap! My goal in building the engine was for it to run on 87 so it was built 9:1 compression. |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21125 |
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Actually, PCM recommends 89 for all the small block Fords. That would include the original poster's '92 with Protec. I agree that anything higher would be wasteful on a stock engine. |
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kapla
Grand Poobah Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Ok will give a try with regular and see what happends. Both engines are stock w/o mod so comp ratio s the one stated by the manufacterer. I think is 9 to 1 on both cases.
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<a href="">1992 ski nautique
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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hate to bust your bubble but Octane has no effect on either of those settings, they will be right whether you use 80 ocatane or 110 octane doesn't a make any differnce what so ever because if it changes by using higher octane then it's not set right to start with. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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79, I guess that if you say so it must be that way. thanks.
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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points control when it fires and that is all mechanical, so how can a fluid/gas effect a mechanical device that requires no fluid/gas to function? it CAN'T. the idle mixute screws are a mechanical limit to the amount of fluid that passes through the curcuit, how can the elemental composition of the fluid effect a mechanical limit/orifice size? IT CAN'T it's a fixed area that the fluid travels through and since octane doesn't effect it's viscosity it's flow characteristics are not changed. So conclusion it doesn't do a damn thing changing the octane rating, the only reason to increase octane is to eliminate a pre-ignition issue, aka ping, which is more common in a high compression High perfomance motor that needs the extra bunch and higher flash point the higher octane gives you. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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79 I might not be as versed as you on all this but what you say doesnt sound square to me, a different gas has different detonation, therefore different advance and maybe even different mix at the carb. Please keep in mind that not all boats are the same nor are all conditions and parts used in them, 93-95 is the lowest octane fuel I can get here, so we tuned it to perform it best with it, does it perform better than using regular?? I dont know and I couldnt care less, it's what I have and I prefer to enjoy the hell out of the boat every day rather than reinventing the wheel. it works for me, if it doesnt for you then deal with it.
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BigAir
Senior Member Joined: March-01-2004 Location: Wis. Rapids, WI Status: Offline Points: 155 |
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Picture 79 as a junior high teacher.......... In my picture, I see spitballs flying.
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Sam B
Senior Member Joined: November-17-2007 Location: StevensPoint WI Status: Offline Points: 393 |
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Here we go!!!
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shawnmc
Senior Member Joined: March-17-2007 Location: United States Status: Offline Points: 282 |
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OM45GE
Senior Member Joined: September-07-2007 Location: United States Status: Offline Points: 109 |
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Looks as though Kapla is in Argentina. They may not use the same octane ratings we do, so he should be sure he's looking at the equivalent ratings to what we're telling him.
Measurement methods The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane. There is another type of octane rating, called Motor Octane Number (MON) or the aviation lean octane rating, which is a better measure of how the fuel behaves when under load. MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, a higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 8 to 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON. In most countries (including all of Europe and Australia) the "headline" octane rating, shown on the pump, is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, the octane shown in the United States is 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, is 91-92 in Europe. However most European pumps deliver 95 (RON) as "regular", equivalent to 90-91 US (R+M)/2, and some even deliver 98 (RON) or 100 (RON).[citation needed] It is possible for a fuel to have a RON greater than 100, because iso-octane is not the most knock-resistant substance available. Racing fuels, AvGas, LPG, and alcohol fuels such as methanol or ethanol can have octane ratings of 110 or significantly higher - ethanol's RON is 129 (MON 102, AKI 116). Typical "octane booster" gasoline additives include tetra-ethyl lead, MTBE and toluene. Tetra-ethyl lead (the additive used in leaded gasoline) is easily decomposed to its component radicals, which react with the radicals from the fuel and oxygen that start the combustion, thereby delaying ignition, leading to an increased octane number. |
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1989 SN 2001
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Boy what a dumb ass, not too bright either really doesn't understand the finer points in tunning an engine and that the cam has more effect on the timing than the octane rating of the fuel, gasoline is gasoline, now you want to throw ethanol in to the fuel mix or even run straight achohol then you have to change the flow rate in the carb aka JETS, not the timing d*ck head. NO ONE SAID YOUR POS DIDN'T RUN GOOD OR IF IT WAS STOCK SAID THE F N OCTANE HAS NO EFFECT IN YOUR STUPID ASS WORLD ON HOW TIMING OR CARB IS SET. d*ck |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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79 nice congratulations on the boat you USED TO OWN
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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made a nice porfit too, but the next you will run faster than 52 MPH that the 79 did d*ckHEAD |
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boat dr
Grand Poobah Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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I do not have a calender in front of me.
But, from the reply that was posted by 79 , I will conclude that it is the first of the month. This means it is time for his trip to the local Wal-Mart to pick up his supply of MEDS. Give him a few days guys and he will be back to his "Happy Self" Chris Wrote............ "made a nice porfit too, but the next you will run faster than 52 MPH that the 79 did d*ckHEAD" Boat dr Replied.............. I would not unload my boat if it only ran 52mph |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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Sorry, did I just read "blah blah blah I dont have a boat blah blah, all others are POS, I only live from the memory of the one I USED TO OWN and the distributors I USED TO DESIGN, that's why my mouth is full of s79t and bashing other makes my day, sorry you all I dont have a life"
Ok, I forgive you, but I think you need some therapy... ...or a new boat |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Sorry Doc my spellings a little off today LOL
profit. what happened to the days where we didn't have arrogant foreign ass wipes that have trouble translating the english lanuage on a comprehinsion level, AAAHHHH they seem so long ago wwooo is mmmeeee. The boat was sold because I wanted too sell it because I want a different hull style as my life has changed and the way I like to enjoy boating has too douche bags. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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lanuage?
comprehinsion??? sorry, it seems my web translator can't figure those, or is it that a foreigner spells your own language better than you do that pisses you off??? Anyway, you're full of s79t, you always seem to have a reason to bash on others, I'm really sorry for you, if you dont like me posting here, then I'm sorry too, deal with it, I OWN A CC, what about you? maybe it's you who should take the bashing somewhere else. What about www.Iusedtoownaccbutchangedmylifestyleimfullofs79t.com |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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here let me help translat "aroogant foriegn **** " hows that work for you? |
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quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
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Definitely a High Octane Thread Now!
Luciano, Tried your link above and it is a Gay p0rn Site.. What The.......? Home page of Homo's, PLBC'ers in their Pink Wet Suits. Chris, So what will be your next craft? The bar has been set pretty high lately with some of those 60mph boats. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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let me see if it works
I will try translating 79nautique... 1-"Chris Broshar, american square head wich used to own a boat some loooong time ago, and now hates everyone who can enjoy a boat not being so anal as he is, he's full of s79t on everyone since he USED to design stuff for someone else some loooooong time ago too, but beware, his old boat made 52mph, then he changed "his lifestyle" and sold it becoming the richiest guy in the US. He's also plenty on verbal aggression involving the word d79k wich since it's simple, he can spell right. Now he spent his days bashing people on the website of OWNERS of the boat brand he USED to own." 2-Some suffered guy I think it's working good now! |
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MarineTech
Groupie Joined: April-07-2008 Location: Kentucky Lakes Status: Offline Points: 61 |
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I usually avoid local politics like the plague, but I couldn't pass this one up! Mark one up for Argentina LMAO....can't stand it I'm laughing so hard my keyboard shakes. Nothing like good clean fun, no s79t! Ken |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Douche bag
1) I still do mechanical deisgn, just for ROLLS-ROYCE jet engines for the military now, 2) boated just as much the last two years as I did the prior years, hwo said the only boat I had access to was the one I sold. 3) your an idoit that has no clue about AMERICA and our way of FREEDOM. Quiner nice one, looking at a Rivera with a 454 actually curroius how the cuddy area is and how it compares to a Cuddy nautique, but most likely I'll end up with a barefoot or late 80's martinique want a smoother rough water riding hull design. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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1-So every US citizen is paying you to post on here instead of working?
2-You're a boat w79re now 3-It seems that the one who doesnt have a clue about your ways of freddom is no other than yourself, since you're the one stating that I should not post on this site for not being born in the US. Please stop referring as "freddom" just as a slogan and start living/giving it, for that you make my eyes bleed. Go get the new boat, hope you enjoy it. Now, back to the topic, perhaps some of the real knowledgeable guys in here such as the Boatdr, Eric, Reidp, Trbenj, Brainard or most others with good manners can jump in and give their insights. OM45GE's post was quite helpful I think. |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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hey d*ck head it's "FREEDOM" not freddom douche,
said nothing about having to be american just don't care for the arrogance, And maybe you missed the pictures of me with the BoatDr, or Pete or Tim or Reid, I could careless about Eric but then he knows his tranny's and chevy's and that's about it. believe the question was answered long before your s hit started flowing out of your ass because you don't understand the finer details of a carb or timing an engine. Guess that's the way they do it in substandard areas of this world. |
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Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
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Man this sounds like good clean reality-tv...
I'm recovering from the stomach ache I got while LMAO at you guys bashing on each other... BTW 79... I'm also a forreigner with very VERY little understanding about tuning... , but I keep learning as I go... |
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- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
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