big main jet

[joshv5.0]

i recently bought a 98 banshee then it blew up on me after 3 tanks of gas

 

so i have a little down time to check out what i had in the motor. since i bought it used i really didn't know

 

mods are in the sig but i'm running a 370 main jet doesn't that seem large?

[stclark04]

It could be, but it might not be.. What did your plugs tell you? I wouldnt think it would blow up because of a 370 main. If it was too big I would think that you would have been fouling plugs. Not blowin shit up.

[joshv5.0]

It could be, but it might not be.. What did your plugs tell you? I wouldnt think it would blow up because of a 370 main. If it was too big I would think that you would have been fouling plugs. Not blowin shit up.

281267[/snapback]

 

 

it blew up because of an air leak not really jetting. it just seemed kinda large

 

the plugs are black but i posted some pics up of them a while back and the picture made them look very lean but they weren't

[lincster]

It could be, but it might not be.. What did your plugs tell you? I wouldnt think it would blow up because of a 370 main. If it was too big I would think that you would have been fouling plugs. Not blowin shit up.

281267[/snapback]

 

 

it blew up because of an air leak not really jetting. it just seemed kinda large

 

the plugs are black but i posted some pics up of them a while back and the picture made them look very lean but they weren't

281274[/snapback]

 

I don't think that is too big. 370 mains is what I run and I know I don't have an airleak.

[sredish]

Lincster, are you ported?

[lincster]

No, I am not ported.

I have been asked that before and people can't believe I run such big mains.

I have been running like this for 3 seasons.

I am fat on the top end, like I can't pull a real crisp 6th gear, but I don't care. I would rather be a little fat on the top end then burn up my motor.

[sredish]

Understood. I was also way way richer on my main than pretty much everyone with a similar setup. Interesting to see where I end up after I get my cylinders back from the porter.

 

More air velocity means more fuel vacuum, so I'm curious to see how much I actually need to go up.

 

Later.

[FIRST BANSHEE]

i recently bought a 98 banshee then it blew up on me after 3 tanks of gas

 

so i have a little down time to check out what i had in the motor. since i bought it used i really didn't know

 

mods are in the sig but i'm running a 370 main jet doesn't that seem large?

281264[/snapback]

seems alittle fat to me, every engine is different though it will tell you what it wants.

were your needles on the top clip?

[mat]

370's are probably fine as long as it is running OK. I run 390s with the modifications listed below. They are a lot larger than most other banshees with similar modifications, but they are right for my quad.

Edited November 16, 2004 by mat

[Big Blue]

Understood.  I was also way way richer on my main than pretty much everyone with a similar setup.  Interesting to see where I end up after I get my cylinders back from the porter. 

 

More air velocity means more fuel vacuum, so I'm curious to see how much I actually need to go up.

 

Later.

281498[/snapback]

 

Werent you almost on the last jet size anyway?

[sredish]

Blue, I was. Then I went to a richer needle and it gave me a lot more fuel in the 3/4 to WOT area, and I was able to back my main off 6 or 7 sizes, from a 220 to a 200, plus it hits a lot harder now, seems to be getting the fuel it needs.