Planet Minis

loopedout · 09-02-2008, 09:22 PM

I run leaded 104 in my 124se, its 13:1 though, all the other bikes get super unlead

AFROracing · 09-02-2008, 09:37 PM

once you get around 170 psi you need to start looking at race fuels..
if running it in your stock bike you notice a decrease in power that is because you have to rejet. Get the jetting set for the high octane and you'll notice a bit better performance but nothing to justify the cost. In some gas stations you can find 100 octane on pump for about $6 a gallon it does the lower compression motor good, keeping the system a lot cleaner.. And it smells good also!

save to 110 for the weedeater you can let that stuff sit all winter without the carb gumming up!

aaron33_dg@f · 09-02-2008, 10:07 PM

Quote:

Originally Posted by SUZUKIRM12594

It dont make too much of a difference if you running it on a stock...BTW. Not to thread jack but can any one in the socal area tell me where to get the cheapest race fuel...All I know of is $60 a can...

in medvally they sell it out of the pump for $9-11 bucks a gal thats where i get mine

Waffle · 09-02-2008, 11:17 PM

Quote:

Originally Posted by OutlawMini

Anyone running full strength racing fuel in a pit bike if so do yu have to change the valves or anything for it to hold up. And what octane are you running? i have heard of some running it but mixing it with regular gas.

Ok no one asked him so I will. What bike and what motor are you running??? How about a big bore kit?

mavbike · 09-03-2008, 01:03 AM

Quote:

Originally Posted by Waffle

Ok no one asked him so I will. What bike and what motor are you running??? How about a big bore kit?

What gas depends on compression. One of my first performance builds was a ATC200 that promptly destroyed a piston. Now I know your short answer.
* High compression-use high octane.
* Normal compression-use pump gas.

Did an experiment in fleet services. Tried our gas vehicles on Supreme for 1-month. Then on 87 octane for 1-month. All but one got better gas mileage on the 87 octane. The 1 that worked better on 93 octane was a Cadillac with the early overhead cam front drive.

What compression to start looking at race gas depends on combustion chamber design, ignition timing, and actual mechanical compression (not just psi or static compression). Mechanical compression is effected by both swept volume (engine size) and cam timing. Not a simple answer.

SHADE · 09-03-2008, 01:06 AM

I run U4.2 straight now mix, wish i could find u4 i buy lotss

09-02-2008, 09:22 PM	#21 (permalink)
loopedout 1st Gear Member Join Date: Jul 2008 Posts: 149	Re: Racing Gas I run leaded 104 in my 124se, its 13:1 though, all the other bikes get super unlead

09-02-2008, 09:37 PM	#22 (permalink)
AFROracing PM Newbie Join Date: Oct 2006 Posts: 65	Re: Racing Gas once you get around 170 psi you need to start looking at race fuels.. if running it in your stock bike you notice a decrease in power that is because you have to rejet. Get the jetting set for the high octane and you'll notice a bit better performance but nothing to justify the cost. In some gas stations you can find 100 octane on pump for about $6 a gallon it does the lower compression motor good, keeping the system a lot cleaner.. And it smells good also! save to 110 for the weedeater you can let that stuff sit all winter without the carb gumming up! Last edited by AFROracing; 09-02-2008 at 09:41 PM.

09-03-2008, 01:06 AM	#26 (permalink)
SHADE The Hammer Join Date: Jan 2005 Location: So*Cal Posts: 5,369 Awards Showcase Total Awards: 1	Re: Racing Gas I run U4.2 straight now mix, wish i could find u4 i buy lotss

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)