What oil is best? and what ratio?

[jakethesnake]

What do you see there that makes you think it would work better at 40 Kieth

 

[Keith Gandy]

What do you see there that makes you think it would work better at 40 Kieth

Better combustion. Still alil rich even ran at 14800. Id like to see darker brown to almost black but that pic isnt much run time either and it would build and darken

 

[sawmikaze]

XP oil at 40:1 is kinda sloppy in my br450.

 

[jakethesnake]

I'm kinda ok with a little slop

 

[Keith Gandy]

XP oil at 40:1 is kinda sloppy in my br450.

Thats a blower? Factories IMO recommend 50to1 in stock equipment with a safe tune but when we port equipment and push it to its max with tune is where a better oil and more oil will help but most equipment reacts and combust differently with different oils. But we must remember , OIL IS OIL?!

 

[Keith Gandy]

I'm kinda ok with a little slop

Safe

 

[jake wells]

no slop if you tune them right.

 

[Keith Gandy]

no slop if you tune them right.

But then again some oils combust more readily than others at certain loads, tune, ratio, and the enviroment its used in

 

[sawmikaze]

no slop if you tune them right.

Spec is around 7 grand.

Thats where its tuned.

Its sloppy...its oozing out my exhaust port on my muffler.

 

[Keith Gandy]

Spec is around 7 grand.

Thats where its tuned.

Its sloppy...its oozing out my exhaust port on my muffler.

7 sounds very low. I think I tune my br600 around 8700

 

[sawmikaze]

7 sounds very low. I think I tune my br600 around 8700

They told me goin past 7 is hard on the fan..

Did they lie to me ?

 

[Keith Gandy]

They told me goin past 7 is hard on the fan..

Did they lie to me ?

12yrs on mine no problems. Only thing Ive replaced is a plastic cam gear

 

[PA Dan]

new because used oil can damage the oil pump and it makes a nasty mess.

You would run new motor oil as bar oil but complain about the price of 2 cycle oil? [emoji28] [emoji23] [emoji28] [emoji23] [emoji24]

 

[Keith Gandy]

Ryan I may be at 7800 rpm on mine but Id have to check with tach tomorrow. Think I remember reading on a 420/450 the fan will stall at about 7600rpm

 

[5000+]

7 sounds very low. I think I tune my br600 around 8700

How you do dat? They only go 72-7400 with factory nozzle.

 

[Keith Gandy]

How you do dat? They only go 72-7400 with factory nozzle.

I think its 7800 but not 100% sure but I get off of work at 3 and will tach mine and post a pic. Im almost 100% sure its more than 7400

 

[Keith Gandy]

Maybe the earlier 4 mix units had a unlimited coil?

 

[Nitehawk55]

If it's much over spec set it to what it should be Kieth , old or new those fan wheels can grenade at any time and the extra RPM don't really add much to your CFM/air speed .
Don't want to see anyone injured .

 

[sawmikaze]

Ryan I may be at 7800 rpm on mine but Id have to check with tach tomorrow. Think I remember reading on a 420/450 the fan will stall at about 7600rpm

Spec is 7 grand on a 450 , i called today and asked.

 

[tp2177]

Finished out the gallon of 93 Conoco 100% gas and red armor 40:1. Everything loved it and they seem to start much easier. Time to go get some more.


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