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 Tell me WHY you would do that
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WildCat                    POA Site Supporter Prowler Junkie Personal ScrapBook From:North Louisville, Indiana, USA |
posted 11-07-2000 03:46 PM
    
I have voted in the new poll for the week  I would like to know why since Chrysler recommends 91 octane fuel you would run less than that. I feel a HIGH COMPRESSION ENGINE, and ours or rated at 10:1 are high compression in todays standards, should have quality gas to run them on. Most everyone is wanting more performance out of the Cat but some feel fuel does not matter. Would you put less of a battery or use less votlage because it would work? Yes, you can run an electric motor on less voltage than required but what happens, it runs hotter and will burn out faster. My 2 cents, you bought a performance car with recommended premium fuel, use the best you can get that meets the min. requirement from the factory. Using better than recommended might be a waste, but so is going the other way. By the way I use AMOCO ULTIMATE or SHELL PREMIUM 99% of the time. I also voted for the other little poll going on today ------------------ |
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STARFLAME Prowler Junkie From:Greensboro,N.C.,USA |
posted 11-07-2000 04:12 PM
I agree,When You have a GREAT Ride take the BEST possible care of it!!! Whats a few cents on a gallon??? I want MY Kat to always be at its BEST. This CAR is what DREAMS are made of. STARFLAME |
butchcee POA Site Supporter Prowler Junkie From:Lake Ariel, Pa. |
posted 11-07-2000 04:51 PM
Personally, I always use 93 octane, but realistically, the best mix might be a combo of 89&93=91. The lower the octane you can use without knock will yield the highest torque. Any other thoughts on this out there? ------------------ |
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Nyle Wing Prowler Junkie Personal ScrapBook From:USA. |
posted 11-07-2000 05:58 PM
When the pump says that it's 93 octane, How do we know that it really is ? How can it be checked ? I have a problem believing that any type of fuel stays a consistent octane ! do to age and mixing with different truck loads. And yes I use the highest octane always  ------------------ |
Punk N Purp POA Site Supporter Prowler Junkie From:Pacifica, CA, USA |
posted 11-07-2000 07:44 PM
I have to say, I always use the best fuel I can in my Prowler. I also believe that the brand makes a difference. I have seen the octane ratings are the same at the stations that have a smaller price. If that is really the case (that they have the same octane) then it is something else in the gasoline that gives a car more torque. I have done a comparison over 10 years on my Dodge Grand Caravan. It has a smaller V6 and I can say it makes a difference what kind of gas I use. I have to go up a long hill out of Pacifica, and back home. If I have Arco or some other more inexpensive brand I can never pick up speed to 70 from 50 and have the car shift. It just races the engine and won't shift. It has no more power. All I do is change to a premium brand which costs ten cents a gallon more and I pick up fine, and when I reach 70 and ease my foot off the accelerator it shifts to high. I usually in the past have changed to the cheaper gas after I have had the Caravan a few years and noticed that it lost most of it's power. It took lots of trial and error to confirm that it is the brand of gas I use. Oh, by the way, I use the regular unleaded in my van. I have read for years that they all use the same gas and it is all the same. This is why it took me forever to figure out why I lost power sometimes. I may not be the usual driver that never floors it, because I want all the power a car has… and more. Come to think of it, I am probably an average "Prowler" owner. So for my experience, I couldn't disagree with "butchcee" more: " The lower the octane you can use without knock will yield the highest torque." I have not found this to be the case. By the way, I have never been beaten from a light in my Caravan… Of course who races a Caravan? J |
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butchcee POA Site Supporter Prowler Junkie From:Lake Ariel, Pa. |
posted 11-07-2000 08:58 PM
Purple Pacifician-Here's is a bit from a Klotz oil Tech Report Titled: over Octane; "Over octane causes definite horsepower loss.When an engine is over-octaned, the exhaust headers will often glow red. Do not confuse this with running lean.If your jetting is proper and still have glowing exhaust headers, the fuel is probably burning outside the cylinder causing glowing headers. With an over-octaned engine,performance is a serious problem" The point they're trying to make is that the slower burning high test will complete its burn outside the cyl, wasting heat-energy. The only way to tell is on the dyno. Now how many miles are on that Van, and how much carbon is on the piston tops? Think the compression is any where near the original design?-Just a thought! My conclusion came from the gasoline powered model boat engine that turns much bigger props and runs cooler with 87 octane opposed to 93. ------------------ This message has been edited by butchcee on 11-07-2000 at 08:59 PM |
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Punk N Purp POA Site Supporter Prowler Junkie From:Pacifica, CA, USA |
posted 11-07-2000 09:30 PM
Well, I wasn't clear on my Caravans. I have had a few over the years. The last one I tested when it had only a thousand miles on it. Made a big difference with the more expensive fuel. The more inexpensive gas says it has alcohol in it. Even though it has the same octane it has much less power. Talking about model engines. I used to fly and race radio-controlled airplanes. They would go faster and turn more rpms with more octane in them. They burned alcohol and you can get more and more mixture of Nitro added to the alcohol. The more it had… from 5% to 40% the faster it would fly. I am sure that both your boat engine and my airplane engine examples aren't completely applicable to the Prowler. I am certainly not an expert, just what I found. PS, I have never seen exhaust headers glow red. My car runs cool all the time. |
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butchcee POA Site Supporter Prowler Junkie From:Lake Ariel, Pa. |
posted 11-08-2000 08:38 AM
Purple Pacifican-Not wanting to beat this subject into the ground, but the model engines I was refering to are GASOLINE powered not alky-nitromethane as in the ones you're refering to. Gasahol is a cheaper and cleaner way to raise the octane of gasoline . No refining costs, just add the alky-look out for fuel line degradation in older cars. How would you know if yout exhaust is glowing unless you parked your self under the hood during a high speed pass at night? Also, to clear up the Klotz report-they were talking about 100+ octane fuels for race use-I was just using the report to give a general idea to reinforce my thoughts.I had a friend that was running a modified Go-Ped. He knew I modified the smaller motors for use in the boats. His engine was similar to the boat ones, both running on gasoline. He complained that he was constantly getting beat by the other guys and was running the same stuff on the motors. I asked him to list him mods and when he told me he was running Cam2 fuel I knew where his problem was. I told him to refuel with 87 octane and give it a try. He called back and reported that he was now on par with his fellow Go-Ped racers.More low end torque and cooler running!! TRUE STORY This message has been edited by butchcee on 11-08-2000 at 08:40 AM |
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harry yarnell Prowler Newbie From:perryman, MD |
posted 11-08-2000 09:38 AM
I am not an organic chemist, however over the years I have believed the wisdom of others who are. One tenet that I understand is, that octane has nothing to do with the AMOUNT of energy in a given quantity of gasoline. It is a knock preventitive level.I am aware that the higher the compression and temp, the more octane is required to prevent knock. When knock occurs, energy is lost and potential engine damage may occur.I have fought knock in older high compression engines for years, always seeming worse in hot weather and A/C on. Now the Prowler has, what, 10.5:1 compression, and should use at least 92 octane to control knock, now this modern marval is equipped with a knock sensor, when the hint of knock occurs the timing is retarded to control it, within the limits of timing. I have not 'tested' this feature, however I've used 'regular'(87 octane) from time to time. Never had it knock, nor did I feel any difference in performance. Obviously these comments of 'performance' are seat of the pants and not quantitative. Bottom line, I use 92 octane, however unless you push your prowler, you probably can use lower octane. |
LOSE LOSE situation my opinion also
AL
Nyle All times are CT (US) Top of Page Previous Page | Return to General Prowler Discussion next newest topic | next oldest topic |
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