The Yamaha Road Star Warrior Forum

quote:

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Originally posted by MacWarrior

Great it's working for you.
IMO - if you tried 100 octane and that didn't work. You had something else going on..

But hey , its great your happy

Kyle

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Same here, glad to see it solved your problem.

I've said this before but it was quite a while ago. When installing PR 10.25 pistons I had the combustion chambers, valves, piston tops and exhaust ports thermal barrier coated. I run California 87 octane with zero pinging. I'm a bit surprised the turbo guys, including you Oliver, haven't gone this route. Tests have shown there is virtually no hp increase to a water-cooled V8 motor but I feel an air-cooled motor like the Warrior's benefits from running cooler.

Performance Coatings did my motor for around $200. I have peace of mind and save a little with each fill-up and if anything, have increased performance to boot. Just my $0.02 worth.

The older I get,
The faster I was.

When I was fast,
Motorcycles were slow,
Now motorcycles are fast,
And I'm slow.

I think I just experienced pinging for the first time yesterday.
I heard loud ping-pop that sounded like aluminum baseball bat hitting a ball or a metal golf club hitting a ball from the pipes after being in stop-n-go traffic on a hot day.
The noise occurred under acceleration & also felt a power loss/mis-fire.
the pipes also rattled alot. Does this sound like what you are experiencing?
This also started 20 miles after filling up fuel tank at a pump that did NOT have a designated
hose for premium fuel. I'm hoping that I just got a bad tank of fuel.

My bike has the full PR110 combo with S* ecu & trigger wheel timing mod advanced 2deg

quote:

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Originally posted by Frankenstein

Lower compression - yes - just a touch but also more displacement

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Correct me if im wrong but isnt displacement (bore * stroke)?
since you have changed neither, the displacment shouldnt be effected


chamber volume is raised slightly, but this doesnt not increase displacement

other wise using your theory, HC pistons would change the displacement as well, since they change the combustions volume

the only way to change displacemnt is to change bore or stroke....

otherwise, this is an excellant write up, and i agree with cadman, i dont understand why more people dont have thermal coatings in there engine

hey oli, how r u bud?
question bout ur double head gasket mod. i too have the pingin, only under load in higher gears, been using good vpower 93oct. gas from shell, and i have been trying different octane boosters as well, i do have a custom map, everything is fantastic cept for highway runs in higher gears when i crack the throttle, that is when it occurrs. i do have 2 sets of pr 110 head gaskets (bout 30thousandths each). had my cylinders cut to 0 deck height, that's when the pinging occurred. i was wonderin do i need to use the xtra head gasket cuz it is a 3 layer gasket (approx. 30thousandths of an inch in total) or should just a 10thousandth of an inch base gasket would work just as good and not come down too much on the higher compression to totally defeat the purpose of 0 deck height? u follow me????
only thing is, i would have to remove the cylinders and have someone help me get the pistons back in as opposed to only takin the heads off to put another gasket on.. would a thinner single one piece (10thousandth of an inch) gasket added on to the one single (30thousandth 3 piece) be just enough to stop the ping? if so, i would rather go that route. soo, please, tell me ur opinion on this...
i will prolly do either one, but if short cut is available to get the same results, i would most definitely take that route....
anyways, have a good one....[]
james[8D]

quote:

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Originally posted by Frankenstein

Here is a little writeup on a mod that will cure the high compression ping of any Warrior:

http://www.fxstein.com/blog/index.php?op=ViewArticle&articleId=52&blogId=1

Ask 357Warrior about his Warrior feels after this recent mod.

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We did the head gasket because of the very same issue. Its the easiest mod as only the heads need to come of. Ad 1 extra and you will not see any more ping. I am running 2 of the 110 head gaskets on the turbo for the past two years without any issues.

quote:

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Originally posted by Frankenstein

We did the head gasket because of the very same issue. Its the easiest mod as only the heads need to come of. Ad 1 extra and you will not see any more ping. I am running 2 of the 110 head gaskets on the turbo for the past two years without any issues.

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Add 1 complete gasket or 1 layer of a gasket?

Also, could the pr 110 head gaskets be reused when adding gasket.
I know what the correct answer is but does anyone reuse them?

I ran 2 head gaskets per side on a 289 that I used to race but for a quick fix of more valve/spark plug clearance.when I put the engine together I could not gap my plugs more than .050 or it would close them back to .050,I also had only .042 between the valve and the piston,so instead of cutting on the pistons(I had a race the next day and did not have the time)I installed 2 head gaskets per side.I turned 9200 rpm's going thru the traps weekly and it worked without any problems all year so I did not change it till the end of the season when I tore the engine down to freshen it up.As to a permanent fix and longevity for a daily driver who is to say,but for most off us who run the crap out of our Warriors nothing lasts for ever and we will be wrenching and modding till the day we die![]If you race an engine it will not last as long as one that is putted around on,but who wants to putt around all the time.THANKS OLIVER FOR ALL THE GREAT IDEAS AND TIME SPENT,YOU NEVER CEASE TO AMAZE ME!

quote:

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Originally posted by 1fast1

quote:

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Originally posted by Frankenstein

We did the head gasket because of the very same issue. Its the easiest mod as only the heads need to come of. Ad 1 extra and you will not see any more ping. I am running 2 of the 110 head gaskets on the turbo for the past two years without any issues.

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Add 1 complete gasket or 1 layer of a gasket?

Also, could the pr 110 head gaskets be reused when adding gasket.
I know what the correct answer is but does anyone reuse them?

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I am talking complete gasket with 3 layers. You are making a good point though. The full gasket drops compression from 10.25:1 to about 10:1. As single layer would do roughly 1/3 of that. So you would come in at 10.15:1 or so. Might be worth a try.
Never reuse an old gasket. Thats when things leak and break.

quote:

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Originally posted by Cadman

I've said this before but it was quite a while ago. When installing PR 10.25 pistons I had the combustion chambers, valves, piston tops and exhaust ports thermal barrier coated. I run California 87 octane with zero pinging. I'm a bit surprised the turbo guys, including you Oliver, haven't gone this route. Tests have shown there is virtually no hp increase to a water-cooled V8 motor but I feel an air-cooled motor like the Warrior's benefits from running cooler.

Performance Coatings did my motor for around $200. I have peace of mind and save a little with each fill-up and if anything, have increased performance to boot. Just my $0.02 worth.

The older I get,
The faster I was.

When I was fast,
Motorcycles were slow,
Now motorcycles are fast,
And I'm slow.

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I have been playing with the idea for a while but there are only so many things you can do at once.... [] You might be talking about the uyltimate fix and I have been cointenplating it for the new custom supercharger Warrior I am building. As the engine will soon come out for the frame to get re-coated, this might be the time to do it. Can you send me more details?

Thx!

Thinking of the stage IV mod this winter...has anyone else done the thermal barrier coating?

Has anyone ever thought about methanol injection. I know it is used alot in high compression or forced induction engines in cars and trucks. Why not try it on these high compression bikes with pinging.

http://www.alcohol-injection.com/