Lucas Octane Boost In Clone, Simple Question

[jr dragster T]

#6 in that picture is to ensure the needle stays where it should. Without that the needle will be all over the place when letting off the throttle and a rich condition will cause it to shut off and come back and so on.

 

[modelengineer]

Pinging is like a metallic clinking sound, I heard it a few days ago in my paddock basher when I put 92 in it, when really it needs 96 or 98 octane. I first thought it was gears slipping in the transmission or diff.

 

[justinkk2005]

what model is the mikuni carb (22mm) that afk sales?

i think i did loose that That could explain it, could anyone find me the correct piece?

 

[Rotore]

Rule of thumb anything over 11.0:1 comp use higher octane or you'll here that "ping or clink" which is pre-ignition where the compression actually ignites the air/fuel mixture.

 

[justinkk2005]

Rule of thumb anything over 11.0:1 comp use higher octane or you'll here that "ping or clink" which is pre-ignition where the compression actually ignites the air/fuel mixture.

using 1 ounce of lucas octane boost to 1 gallon of gas = 96 octane

you can smell it with no pinging and it cools down within minutes

 

[jr dragster T]

My 440 sled engine runs 14:1 compression ratio and we run pump gas no problem. Although it is liquid cooled.

 

[justinkk2005]

bump asap

what model is the mikuni carb (22mm) that afk sales?

i think i did loose that That could explain it, could anyone find me the correct piece?

 

[mr dingo]

octane booster don't work there just taking your money

 

[justinkk2005]

octane booster don't work there just taking your money

I believe firmly in Lucas Products

 

[02mx-5]

Higher octanes actually burn cooler....

If you do have problems with 93, you could buy AV gas. Not as expensive as race fuel but its 100 octane...

Higher octane burns at a higher temperature actually. The higher the octane, the hotter temperatures it can withstand before igniting. The more compression you have the hotter the temperatures will be, you dont want the fuel to ignite to soon so thats why you need specific octane for certain compressions. ALSO DO ALL OF YOU KNOW.... octane booster doesnt do what your thinking. If you have 93 octane fuel and the octane booster says it raises octane 6 points, that mean you will have 93.6 octane, not 99 octane.

 

[honda02]

My Honda has 13.5:1 and I ran it on pump gas for a bit to see if I had assembled everything right. Warmed it up and took it for a ride and no pinging to be heard. Although its pretty cold, so the carb and intake were that much cooler. Just my two pennies.

 

[Rickracer]

My 93 Honda CBR 600F2 has 11.6:1 compression (stock), and runs just fine on (the factory recommended) 87 octane fuel,

 

[Kenny_McCormic]

I have been told 2 strokes can run higher compression than 4s on pump gas. don't recall why, but they do.

 

[jr dragster T]

I have been told 2 strokes can run higher compression than 4s on pump gas. don't recall why, but they do.

A oldtimer mechanic once told me that too. Keep in mind liquid cooling helps too as heat causes detonation.

 

[justinkk2005]

Fixed the carb problem!

I took a milk jug lid, took a grinder and fabbed it up and jammed it down on top of the needle jet and made the throttle cable work through it and it works amazing LOL

 

[Dusty Wolfe]

Lol, Detonation is heat, Thus melting pistons. Detonation will punch a nice hole threw a piston in no time.

yes but that isnt the point he is trying to make. octane is the measure of resistance to ignition. you are correct but more octane would decrease detonation

 

[DirtTrackRacer_07]

i agree with dusty on his point, so the more octane you have the hotter the cart can get without the pre-ignition of the fuel in the chamber

YOU can melt a piston, or blow a hole in the piston if you have too much compression ratio for the little motors on the stock piston.

I got a small go Kart with a 5hp briggs that all was run through it was 112 octane racing gas for almost two years and it never hurt it.

I cant get no more of it anymore though without having to drive two hours out of my way because the fellow i used to buy it from passed away about a month ago.