dekker Posted April 3, 2008 Report Share Posted April 3, 2008 Im struggling with this guys and have heard different arguments so here it goes... With a bigger Carb do you need a larger or smaller main jet. Thanks Zach Quote Link to comment Share on other sites More sharing options...
jayzx10r Posted April 3, 2008 Report Share Posted April 3, 2008 Im struggling with this guys and have heard different arguments so here it goes... With a bigger Carb do you need a larger or smaller main jet. Thanks Zach It isn't that easy..... PWK Carburetors Standard Jetting SIZE..........MAIN JET SLOW JET JET NEEDLE THR.VALVE STANDARD PWK 28MM 29S .....#135 ..#38 ..46JH ....C.A. 3.5 PWK 33MM S46 .....#165 ..#52 ..48CGL ..C.A. 6.0 PWK 35MM 70R .....#160 ..#68 ..48DGK ..C.A. 6.0 PWK 38MM 71R .....#172 ..#58 ..48DEG ..C.A. 6.0 PWK 39MM 72R .....#160 ..#60 ..48DGH ..C.A. 6.0 Quote Link to comment Share on other sites More sharing options...
Animalman294 Posted April 3, 2008 Report Share Posted April 3, 2008 Just do a plug chop and see where its at, and go from there.................... Quote Link to comment Share on other sites More sharing options...
dekker Posted April 3, 2008 Author Report Share Posted April 3, 2008 I just talking in general ..... take for instance Im going from stock to 34 Tmx's. With the 26 you have a higher rate of air flow because of the smaller area so you would think it would pull more fuel than a larger carb with a lower velocity pulling through it. Then some say you are pulling more air in with a bigger carb and you need to have more fuel to go in with that... Both make sense to me Im gonna start where I was with my stockers but I was just asking to gain some knowledge on the subject. :geek: Thanks Zach Quote Link to comment Share on other sites More sharing options...
4stroker Posted April 3, 2008 Report Share Posted April 3, 2008 you have answered your own question, you just dont know it yet! With the 26 you have a higher rate of air flow because of the smaller area so you would think it would pull more fuel than a larger carb with a lower velocity pulling through it. thats right, so with the larger carb, it isnt sucking as hard on the main jet as the smaller carb, so the main jet needs to be bigger to get the fuel flow through it so to recap that one: larger carb = larger main jet Then some say you are pulling more air in with a bigger carb and you need to have more fuel to go in with that... that is also correct! so once again, larger carb = larger main jet your two statements dont contradict each other, they go together! Quote Link to comment Share on other sites More sharing options...
dekker Posted April 4, 2008 Author Report Share Posted April 4, 2008 OHHHHHHHHH it all makes sens now lol Thanks for the explination ! Zach Quote Link to comment Share on other sites More sharing options...
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