Guys help please! Boost does not want to stick around?

[Skydog]

pic

pic

 

[Skydog]

Last one

Last

 

[Ted Jannetty]

You could have pressure tested your whole system if you just removed the air filter and made a cap and pumped air into the turbo inlet.

It is somewhat normal for that style valve to leak a little air but I don't think this is your problem, it was probably the clamps on the boots leaking you talked about earlier.

There is a tremendas volume of air in the charge air system when the sled is running, you can't duplicate that with a bicycle pump

I suggest you use an air compressor with a pressure regulator set to 20 psi and repeat your test as I suggested above then you wil be testing the whole system for leaks, this is how we do it on the cars and trucks.

 

[Skydog]

Ok cool but the BOV leaks so bad it will not hold any PSI for any time at all. Will fix that and move on.

Thank you Skydog

 

[Ted Jannetty]

Trust me it doesn't leak any volume only pressure, it really doesn't leak enough volume to matter.

 

[Skydog]

I see what you are saying. Man this is getting old fast!!


Skydog

 

[Skydog]

Is there any good way to check the waste gate for problems? Best way to set it?

Thank you

 

[Ted Jannetty]

Again you need a compressor with a good pressure regulator that has good resolution in the lower PSI range.

Hook the pressure regulator to your wastegate, start at around 5 psi slowly increase pressure watching your wastegate lever and the pressure gauge, when it opens about .050 that is your starting pressure.

You should take away the pressure and add the pressure a few times to verify your starting pressure.

I usually start around 8 psi if that is the lowest boost you want to see.

 

[Skydog]

Thank you man!

 

[Skydog]

Bender just told me i am why lean! I had a 500 jet in at max boost. I will go do some testing. Will put a 400 in but man if i was lean i thoght the motor would lean pop?

 

[woodsrider]

The difference between the 400 and the 500 pitot tube jet is not your problem. That would be a "fine tune adustment." Take Ted's advice and check out the charge system. Do you have a pyrometer or air fuel gage? They would indicate to you if you are lean. If you don't have either one, I would install one before you do any more testing.

 

[Skydog]

I GOT HER GUYS! You will never guess what it was i went out to a feild again today. Pulled sled off trailer. Ran her around boost is right on! 13-14 psi. So i stop and what for about 10 mins and try again. Now the boost is down 4-5 psi??!! What is going on? So i pull the vac-presure line off the waste gate. And take off WOW look out 16-17 psi!!! And like no lag! So it has to be in my two new boost switches.((that i check about 5 times at home in a heated gagage!)) I blow in the line and open one switch yes it works. Now for the other switch. It is not working? No air can get out!!! Bing go! Get this it was the front off the two switches. It was getting some snow dust-snow on the switch. In from the vent slots on the exhaust cover! So afer i would stop to make a clutch change it gave it enuff time to freeze shut! Or give up on it for the day an head home in the ((heated)) gagage it would melt off and be good to go for the frist ride. What luck!!

Here are a few pic. of the problem!

Skydog P.S. After i found that i had the clutching spot on in about 3 runs!!HAHA She rocks big time now!!

 

[Skydog]

THE END!!!

 

[Silverbullet]

 

[woodsrider]

I guess that adds credibilty to te theory of not stacking your boost controllers.