Aussie John wrote:
Your right about higher octain fuel the higher the No the slower the burn,as we have a 4>"stroke the longer the gas takes expands the more time it has to force the piston down the bore,premium fuels also have more stuff in it to burn cleaner which should mean less carbon build up,my guess is it should help with svs,tried 98 didnt seem much better than 95,2 aussie flat rocks worth,John

high octaine fuels in roadies is a bad idea.

the `it´s long stroke, therefore a slower burn helps´ bit sounds o.k. in theory, but in practice is a short route to SVS.

higher octaine fuels do not `burn slower´, but have a greater resistance to pre-ignition for higher compression engines. in a lower compression engine the burning of the fuel is not quite so complete and will cause carbon build-up.

for the sake of experimentation, i ran a few tanks of 98 through mine (here in spain the MINIMUM octaine pump gas is 95) and found no improvement in milage nor performance. the only beneficiary was the petrol company

When I can get it , I run a 50-50 mix of Racing fuel . 93 pump gas and 104 octain race fuel . Wakes my roadie right up . Plus I love the smell of racing fuel . No problems so far . The engine runs a little hotter with the 104 stuff but for highway cruising I don't see a problem .

thats is just askin for svs. plus its a waste of money. the smell might wake you up but it does nothing good for you're roady. I love the smell of race gas and Klotz in the morning myself. I have even went so far as to give my weedwhacker and snowblower port jobs and rejetted to run on race fuel! if you really wanna run the race fuel and &quot;wake up&quot; yer roady.. how about a big bore kit and some high compression heads instead of just wasting yer money? of course you can allways throw some of that cash my way instead... LOL <br><br>Post edited by: jetspray, at: 2007/08/06 07:24

My dealer, whom I dealt with for years, told me when I picked up my new 1700 a couple months back NOT to use reg gas - better mpg and less chance of the infamous SVS.

It'd be interesting to find out what gas those with SVS have been using.

ohoh seems like another debate

bushr

erizo wrote:
Aussie John wrote:
Your right about higher octain fuel the higher the No the slower the burn,as we have a 4&gt;&quot;stroke the longer the gas takes expands the more time it has to force the piston down the bore,premium fuels also have more stuff in it to burn cleaner which should mean less carbon build up,my guess is it should help with svs,tried 98 didnt seem much better than 95,2 aussie flat rocks worth,John

high octaine fuels in roadies is a bad idea.

the `it&acute;s long stroke, therefore a slower burn helps&acute; bit sounds o.k. in theory, but in practice is a short route to SVS.

higher octaine fuels do not `burn slower&acute;, but have a greater resistance to pre-ignition for higher compression engines. in a lower compression engine the burning of the fuel is not quite so complete and will cause carbon build-up.

for the sake of experimentation, i ran a few tanks of 98 through mine (here in spain the MINIMUM octaine pump gas is 95) and found no improvement in milage nor performance. the only beneficiary was the petrol company



no debate. quite simple, high octane fuels are made for high compression engines. stock roadstars need 87 and thats all. I was running sunoco ultra94 which I believe was one factor in my svs problem. now that my oil level is right, and btw I am running synthetic. and now I am jetted right, run the right fuel, I have no reason to believe I will ever see SVS again.anyone that wants to send me their extra cash from running more expensive fuel is welcome to.

i just thought of this product. if anyone is interested in trying it.

http://www.klotzlube.com/storeProdDetails.asp?pi=57

A propane company executive I usually ride with (Kawasaki 1000 Concours) was explaining to me that premium gas contains more butane (a component of propane that gives propane more BTU's)
He claims that the premuim fuel contains less benzene and more butane, so the gas atomizes easier, burns cleaner, and should produce less carbon residue.
He says regular gas has more &quot;heavy&quot; stuff in it, making it a little closer to diesel than premium gas on the chart.
The &quot;heavier&quot; the fuel, the more succeptible it is to pre-detonation, this is why diesel engines need to have their fuel injected at JUST the right time, because the compression heat would cause the fast burning fuel to ignite before the piston reached TDC, eventually burning a hole in the piston or other damage.
Because the diesel is so fast burning, it is why a diesel engine clatters. The diesel engine has heavy pistons, rods, crankshaft, and lots of headbolts to hold her all together. The early Oldmobile 5.7L diesel was a failure because they tried to put diesel heads on a plain old Oldsmobile gasoline engine. The engine would not withstand the faster-burning, hotter-burning diesel fuel.
A friend of mine that sold STIHL power equpment for years also said that they found more carbon buildup, piston and cylinder scuffing, and port plugging when farmers used regular farm gas in the equipment. Premuim gas is still recommended by STIHL in all their 2 and 4 stroke equipment. It burns cleaner.
...If I end up with SVS because of premium gas...You guys can come back to me and say, &quot;WE TOLD YOU SO!&quot; Then you can go ahead and rub it in!
But she runs better on it, especially in town when she's running really hot on a hot day. It seems to be smoother, with no knocking upon take-off.
That's my two bits, anywho.

StarMyram wrote:
A propane company executive I usually ride with (Kawasaki 1000 Concours) was explaining to me that premium gas contains more butane (a component of propane that gives propane more BTU's)
He claims that the premuim fuel contains less benzene and more butane, so the gas atomizes easier, burns cleaner, and should produce less carbon residue.
He says regular gas has more &quot;heavy&quot; stuff in it, making it a little closer to diesel than premium gas on the chart.
The &quot;heavier&quot; the fuel, the more succeptible it is to pre-detonation, this is why diesel engines need to have their fuel injected at JUST the right time, because the compression heat would cause the fast burning fuel to ignite before the piston reached TDC, eventually burning a hole in the piston or other damage.
Because the diesel is so fast burning, .

try a little experiment.

pour a couple of drops 95 octaine on the floor (outside in a safe place) and light it, then try the same with a couple of drops of diesel.

diesel is closer to oil and burns slower due to having a far higher evaporation temp.

diesel engines run on average for new engines, 17-1 compression ratios. if you squirted even 100 octaine into a combustion chamber with that compression, the results would be catastrophic (but fun to watch )

i cant help but think that mebbe the exec has possibly been sniffing his own butaine <br><br>Post edited by: erizo, at: 2007/08/06 10:47

I hope I never have to say I told ya so. because SVS isnt much fun. if I wanted a high performance roadstar, I would have bought a R1.

You can run Premium if you want but you are throwing your money away and it does nothing for your Road Star, 87 octane regular belive it or not it will run better and give you better performance on the Road Star....

We did this test on a stock Hayabusa that comes with 9 to 1 compression in stock for and it was faster at the track with regular...

And I agree a BAK, jet kit, 2 into 1 pipe, port the stock manifold, 31 tooth front pully and a Dyna 3000 and boy will it wake up the Road Star....

When my bike was stock, I ride with 3 other Road Stars well when we rolled we where all pretty even, now that I have all those mods minus the Dyna 3000 (Ijust ordered it) wow they are gone I smoke them and its worth the money.... I can wait to put the Dyna 3000.....