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08-10-2020, 04:50 PM #31Scream And Fly VIP
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Glad you reminded me about the plastic.............forgot that..........its amazing to watch acetone ruin plastics!! But would would such a small amount diluted in a 12 gallon tank hurt plastic?
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08-10-2020, 05:02 PM #32
More than likely be ok. Best bet is spend time on the water & burn it all out in 1 day.
AIRWALK
gettin' old ain't for sissies
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08-10-2020, 11:31 PM #33
A little carbon is good . The area that is not is piston wash . "Reading" the wash pattern , color of the plugs porcelain , how far the cad discolored on the ground strap are all "tools" to "arrive at a tune-up. Getting rid of it would be like walking over to your tool box and picking one size wrench .. and throwing it away.
If it's so old that it's carbon city inside , it might be time to pull it apart and go thru it.
I started to pull into a bbq place one day , I saw a sign next door for a $19.95 oil and filter change. Dropped my truck off and said I'll be next door .. see you in an hr.
Before I even got halk way across the parking lot , they called me back .. Your oil is totally dirty , you need our engine flush $36 or $40 dollars , wheel alignment , new battery , belts , hoses .. I said : all ill have left after lunch is $25 dollars .. I might need it , but I cant afford it .. Please just change the oil and walked away.
When I got back (yes I watched them thru the window ) I paid the bill .. I went and asked the kid .. you didn't pour no diesel fuel in my crankcase to "wash it out" did ya .. kid said no sir .. I handed him ten bucks and said , here's for telling the truth , I said to the mgr : I lied to you cuz you lied to me .. that motor don't have no sludge in it , I replaced that plastic manifold about two months ago . And if it did , the worst thing you could do is break all that **** up and have it clog the pick-up tube and kill the motor ..
Like I said earlier I think that bustin loose a bunch of carbon chips isn't good for the piston , rings and cylinder bore ..
With todays oils they can be run pretty clean. Correct fuel mixture and timing , I don't see where the junk yard tune up is really necessary ..
If I just had to do it , I would probably just fog it with Quick-klean .
Octane booster , that another story ..
I mix up 5 gallons at a time .
Toluene , mineral spirits , Marvel mystery Oil ..
Put a gallon in each tank , and bring two gallons with me . Even if I run the tanks down to near empty , I can put "90 wreck" and a couple gallons of booster and make it back to the dock ..
Prices changed a bunch since this was printed .. LOL
Sunoco Ratings SUNOCO "Standard"
Color...Purple
Research Octane...115
Motor Octane...107
R+M/2 ...111
Specific Gravity...0.725
Reid Vapor Pressure... 8# Distallation temp, degrees F
Initial...90
10%...160
50%...220
Final...360SUNOCO "GT Unleaded"
Color...Natural
Research Octane...105
Motor Octane...95
R+M/2 ...100
Specific Gravity...0.760
Reid Vapor Pressure... 8# Distallation temp, degrees F
Initial...90
10%...150
50%...210
Final...230SUNOCO "Supreme"
Color...Blue
Research Octane...116
Motor Octane...109
R+M/2 ...112
Specific Gravity...0.715
Reid Vapor Pressure... 8# Distallation temp, degrees F
Initial...90
10%...155
50%...215
Final...260SUNOCO "Maximal"
Color...Red
Research Octane...118
Motor Octane...115
R+M/2 ...117
Specific Gravity...0.700
Reid Vapor Pressure... 6# Distallation temp, degrees F
Initial...100
10%...150
50%...220
Final...240Richard Lassiter's "How to Mix Your Own Brew" FORMULA 1FORMULA 2
Toulene
R+M/2...114
Cost...$2.50/gal
Mixtures with 92 Octane Premium
10%...94.2 Octane
20%...96.4 Octane
30%...98.6 Octane
Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3 *points*, I.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for less than $3/gal at chemical supply houses or paint stores.
Xylene
R+M/2...117
Cost...$2.75/gal
Mixtures with 92 Octane Premium
10%...94.5 Octane
20%...97.0 Octane
30%...99.5 Octane
Notes: Similar to Toulene. 12-16 ounces will only raise octane 2-3 *points*, I.e. from 92 to 92.3. Usually mixed with Toulene and advertised as *race formula*.
FORMULA 3
Methyl-tertiary-butyl-ether (MTBE)
R+M/2...118
Cost...$3.50/gal
Mixtures with 92 Octane Premium
10%...94.6 Octane
20%...97.2 Octane
30%...99.8 Octane
Notes: Oxygenate. Very common in octane booster products. Has lower BTU content than toulene or xylene, but oxygenate effect makes the gasoline burn better and produce more energy.
FORMULA 4
Methanol or Ethanol
R+M/2...101
Cost...$0.60 - $1.75/gal
Mixtures with 92 Octane Premium
10%...94.3 Octane (Methanol)
10%...94.7 Octane (Ethanol)
20%...Not Recommended
Notes: Methanol is wood alcohol. Ethanol is grain alcohol and found in Gasohol in 10% ratios. Both alcohols are mildly corrosive and will eat gas tank linings, rubber and aluminum if used in excessive ratios. Main ingredient in "Gas Dryers", combines with water.
FORMULA 5
Isopropyl Alcohol and Tertiary Butyl Alcohol
R+M/2...101
Cost...$0.60-$1.50/gal
Mixtures with 92 Octane Premium
10%...94.5 Octane
20%...Not Recommended
30%...Not Recommended
Notes: Similar to Methanol/Ethanol. Isopropyl Alcohol is simply rubbing alcohol.MAKE YOUR OWN OCTANE BOOST How to make your own octane booster (this is the basic formula of one of the popular octane booster products). To make eight 16 ounce bottles (128 oz = 1 gal):
100 oz of toulene for octane boost
25 oz of mineral spirits (cleaning agent)
3 oz of transmission fluid (lubricating agent)
This product is advertised as "octane booster with cleaning agent *and* lubricating agent!". Diesel fuel or kerosene can be substituted for mineral spirits and light turbine oil can be substituted for transmission fluid. Color can be added with petroleum dyes.
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08-11-2020, 06:08 AM #34Screaming And Flying!
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Chaz what about aces I know it is a good stabilizer and rec 90 the shelf life is up to 6 months? thanks Rick
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08-11-2020, 08:30 AM #35The Historic Photo Master
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...i've never needed to remove carbon. carbon is my friend.
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08-11-2020, 01:55 PM #36
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08-11-2020, 03:31 PM #37Scream And Fly VIP
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Chaz, you mentioned about goin' thru it if its so dirty in there. I went thru this 150 crossflow very recently. I got it for beans(300), and I was just wanting the powerhead.......the rest was 25 inch stuff which I dont need. I wanted to do a compression test b4 tearing it apart. it was good.......all in the low 90's for a v6 crossflow with bathtub heads. I pulled the heads.....the piston tops were really nice looking. The bores were good as well. But when I got the pistons out........and removed the rings..........every single lower ring was stuck. I have never seen that in any of my teardowns of these crossflows(I mean flatheads) before where the cylinder bores were in good shape with all the rings being stuck. every lower ring broke trying to get it free.
Thats what brought me to mention about piston clean-up...........before and after. Top rings were good tho.............
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08-12-2020, 08:19 AM #38
Was the second ring "stuck in gunk" or was the ring land "pinched" .. ?
Flathead ... Thanks , that was funny …
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08-12-2020, 01:53 PM #39Scream And Fly VIP
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No, it was stuck in gunk. I scraped out all the old garbage with the pieces of the old rings. When I went to install the new rings, they dropped right in......freely floating not pinched anywhere. It had to be only a matter of time before it grenaded I think. The head gasket crumbled when taking the heads off.
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08-12-2020, 10:03 PM #40
It sounds like someone got their moneys worth … and is as old as you and I added together ..
Another reason to gap the second ring wider than the first .. lets the gas/oil that got by the first ring have somewhere to go .
Them ole flatheads burned pretty dirty too .. and back in the day , the best two stroke oil you could buy was 30wt non-detergent ..
I'm sure you'll build the motor you want out of it .. and now you know exactly what's inside ..
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08-13-2020, 08:13 AM #41
I have run marvel in my 2 strokes for 30 years , i run 50:1 premix plus 10 percent marvel. Even my old inline 6’s stayed together after ridiculous abuse. No stuck rings here! I have used it and have had good luck, i’ll stick with it. My newest outboard is a 1989
Love is a paycheck
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08-13-2020, 02:40 PM #42Scream And Fly VIP
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Crossflows are definitely thirsty buggers!!! Idling around is pretty efficient surprisingly enough. And you are right, Getting it torn down, I know the rings are freely moving around and the motors clean in there. There is no reason for it to not run for many years. I put this one back stock, no porting(minus the center point removing in the ports). I can always throw on tight heads and carbs and make it a gt150 at another date.
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08-13-2020, 05:07 PM #43
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08-14-2020, 03:32 PM #44
A stock 300x falls off the cliff @ 6200 rpm . You can put a small wheel on it and turn it 7000 ... but it will run the same speed as it did with a big wheel and lower RPM ..
Bust out the grinder if you want to buzz it higher ..
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08-14-2020, 03:37 PM #45
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