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View Full Version : JE 426 11.1 is pump gas oK?


agalvan
11-04-2003, 01:08 PM
Hello Guys!, I just got my 426 JE and stage 2 hot cam, is pump gas ok ????
11-04-2003, 01:45 PM
80% will say it's not OK

20% will say it is OK


It will run but I don't see it running as strong as it could with a higher octane mix..
agalvan
11-04-2003, 01:57 PM
How do you like the power on your 416 Rico??
remlapr
11-04-2003, 02:03 PM
I agree with Rico. A guy I know just built a 11:1 JE 416 with stage II hotcam and he has to run 50/50 mix.
11-04-2003, 02:05 PM
Originally posted by agalvan
How do you like the power on your 416 Rico??


I run a 10.8:1 piston in mine and it runs fine on pump. I like to mix it with 110 octane for the extra boost and cooler running temps. I am very happy with my 416. I"ve had it for 2 years now and it's slowly starting to smoke on startup. If i had to do over again I'd not change a thing about the bore or comp. of the piston. It's reliable as it gets..
2001400ex
11-04-2003, 02:21 PM
Would you have to run pure race gas if you installed a 440 kit?
hook
11-04-2003, 02:22 PM
only c12 in mine 416 stg 2 41fcr yousi 11-1 je loving it !!!!!!!:devil:
Ryan
11-04-2003, 02:30 PM
Originally posted by 2001400ex
Would you have to run pure race gas if you installed a 440 kit?

Running race gas mainly depends on the compression ratio and heat so you don't get pre detonation at high temperatures. This is why you a liquid cooled engine can run a higher compression on pump gas.
2001400ex
11-04-2003, 02:34 PM
Originally posted by Ryan
Running race gas mainly depends on the compression ratio and heat so you don't get pre detonation at high temperatures. This is why you a liquid cooled engine can run a higher compression on pump gas.

That's what I was thinking but I wanted to see first. Does anyone know the highest compression ratio that comes with a 440 kit that you can run pump gas on?
Ryan
11-04-2003, 02:41 PM
Most people say 10.8:1 is the highest you can go on pump.
pnut420
11-04-2003, 02:47 PM
This is why you a liquid cooled engine can run a higher compression on pump gas.

Thats so true. Ive had alot of people ask why the YFZ can run 12.5 on pump gas but a EX cant and I tell them its cause its liquid cooled
2001400ex
11-04-2003, 02:56 PM
Originally posted by Ryan
Most people say 10.8:1 is the highest you can go on pump.

Ok, ty for the info! If you haven't guessed I'm looking at a 440 kit:p
agalvan
11-04-2003, 03:09 PM
They told me that I will be ok running pump has and not to worry.
ranger400ex1994
11-04-2003, 10:03 PM
i am looking into the same thing for a 426 kit . i am either going to make my quad a 426 or a 440 but probably start with the 426 and see how i like that.
speedy
11-05-2003, 08:17 AM
Were can i get 110 octane race fuel??