Stage 2 bender too rich ??? Beat by a 440 !

[spray25]

you have a boost leak somewhere, check to make sure your intercooler is seated properly, your extreamly rich condition is because no boost is getting to the motor, there is no way rich jettng would cause the motor not to rev above 7000 rpm. my setup for 8000-10000 ft was 127.5 mains 700 pitot jet with needles dropped all the way for 14psi boost, you may also want to check that the turbo spins freely.

I respectfully disagree. Rich can most certainly keep the sled from reaching full rpms. If no boost was getting to the motor it would not get to the float bowls either.

Look at how much leaner your setup is compared to the OP:
you have 127.5's he has 135's
you have a 700 pitot he has a 200
you have your needles lowered all the way he has his raised all the way.

This is a tremendous diference in jetting.

 

[highpockets]

Just some additional info,even out of boost,sled burbles and gargles,requiring constant fluttering of the throttle to accelarate/maintain RPMs. No large obvious boost leaks,T,s are tight(but will be updated to billet as recomended)Sled should pull well into boost,not the case yet.I changed the jets but got stuck at work til late,will try it tomorrow hopefully !

 

[TURBO TIME]

true there is a large difference in jetting, but under load WOT even with that rich of jetting it should still boost over 3psi and 7000 rpm i am pretty sure there is a larger problem at hand than jetting, i have tried several ranges of jetting from as rich as 145 mains and completly blocking off the pitot, to compensate for a dry shot of NOS, and the sled still ran respectable, these sled are very forgiving on jetting from my experience, while there is a certain range of fine tuning to consider, this sled sounds like it has different issues...

 

[TURBO TIME]

another concern i have seen is a wastegate rod improperly adjusted allowing wastegate to flutter open and closed you may want to check and see that there is no play in the arm that attaches to the wastegate rod.

 

[spray25]

FYI I once tried 145's and 150's and I could not get my sled to rev up at all. I'm not saying no sled will, but my experience with my sled and several others says it is VERY possible to be too rich to run.

 

[TURBO TIME]

let us know what you find, but IMO dont waste time on the main jets, if you're convinced its jetting i would work with the pitot first.

 

[highpockets]

Snowing hard here,so I unloaded it to have a look at the turbo/exh piping. Turbo looks good,spools fine,no side play.However,I have a rather nice leak at the flange to the turbo/pan assy. So I removed the assy to correctly clean and reseal the flange,and also found the Y-pipe cracked.So even when i get the jetting correct I would have been leaving some boost on the table,glad I went this far ! My buddy is going to TIG the Y and I am going to reassemble tomorrow,hopefully storm will die down enough to test,otherwise it may have to wait til sunday.I appreciate once again,all the insight and direction that has been provided,I have found this site to be a BIG help and positive influence on my decision to go to the 4 stroke sled. Thanks so much ! Vince.

 

[1CrazySledder]

Turbotime & highpockets,

Please take a moment to update your profiles with your locations as this is a site requirement.

Thank you,

-1CS

 

[highpockets]

sorry,I didnt notice ! All better !

 

[lakercr]

Snowing hard here,so I unloaded it to have a look at the turbo/exh piping. Turbo looks good,spools fine,no side play.However,I have a rather nice leak at the flange to the turbo/pan assy. So I removed the assy to correctly clean and reseal the flange,and also found the Y-pipe cracked.So even when i get the jetting correct I would have been leaving some boost on the table,glad I went this far ! My buddy is going to TIG the Y and I am going to reassemble tomorrow,hopefully storm will die down enough to test,otherwise it may have to wait til sunday.I appreciate once again,all the insight and direction that has been provided,I have found this site to be a BIG help and positive influence on my decision to go to the 4 stroke sled. Thanks so much ! Vince.

Good find! You'd be leaving more than just boost on the table if you hadn't found the crack, these things just don't work right with leaks. Doesn't matter if the leak is on the intake or exhaust side.

 

[Turbo Tim]

You're jetted way to rich for that elevation . I had 127.5's in my bender kit that I had in Alaska . 3-5000 feet . I'd start there . I never messed with The pitot jets much . I ran the pitot jet blocked off.

 

[TURBO TIME]

the exhaust leaks were your problem for sure, i wouldnt go too crazy on the jetting until you ride it again with the system all sealed up

 

[spray25]

A big exhaust leak will definately cost you boost.

 

[highpockets]

Just got back from a quick ride and HUGE difference ! Night and day,doesnt even feel like the same sled.It may have been a combination of things,as I did find some exh leaks as well as being(in my opinion) too rich.Also split the Big T -fittings into 2 seperate hoses from air caps to intercooler.Sled is WAY more crisp,no burble REVS right to about 11000(Think I need to add a little weight to the primary) Lag,yeah right,not as far as I can tell.The lag is my brain and body saying,you BETTER hang on cuz Im GONE !Actually fell off and shot the sled out from under me while playing in a field,not a one handed sled for sure.Ran LOW boost setting only, saw 8 psi(and thats plenty for me til I get used to the way it runs now) I also built a seperator plate for the HOT side of the turbo,kinda a teardrop shape deal that slides down the middle and keeps the heat away from the air filter. Now all thats left is to play with the Pitot jet and see how it affects how the sled runs,oh and perhaps a step up on the needles,other than that, WOOOO HOOOO !!!!! Thanks to everyone for the quick responses and assistance in correcting my problems as well as helping me keep faith !

 

[spray25]

curious what jets did you go with? Also if you search here you will find pics of the seperator plate than many of us are using. The post was either by Treewhacker or myself.