I know this has been done before but I had trouble finding anything useful searching...

I have an 07 STP 700 that I just finished the muffler mod on (must say it is louder than I expected) and am thinking about getting the DG snorkle and then using the stock filter and rejetting.

I think that the stock mains are 140/145 and and was wondering what everyone else seems to have had good luck with at or around sea level.

While I'm on the topic the fuel enrichener screws should be turned out to increase flow - is that right?

Thanks, ADAM

 

if you only put the pipe I dont think you need to change the jet because it allow more air to get thru the engine at high rpm so more gaz will enter but at lower rpm you gone be lean and you probaly don't have a good response. what you need to do is put some small #2 washer behind your needle probaly 3 or 4 maximum it is simple if you take your time and you be carefull to put evrething back nicely !as fpr the screws you just have to close them and open them until the idle seem at the higher point achevable by this ajusment one screw at the time and you will be right on track ! it is easyer if you get the engine to rev just a bit above idle 1350 insted of 1100rpm approx.

 

Thanks for the help! How do you guys tell how fast the machine is idling without a tach? Or do you guys all have an aftermarket tach or something?

I can do the fastest idle by ear for sure but to set the idle speed to 1100 rpm I have no idea!

 

the best idle speed you can get is when it shift easely from nutral to fwd or rev and this is around 1100rpm to ajus the mixture screws just make it rev a bit higher let say haft a turn on the idle ajustement and ...