tial 44 stuck open at idle

[my98gsx]

ive searched the forums for a while now and i cant find an answer to my problem... i just installed 280 cams and a tial 44mm wastegate... i started the car up for the first time today and the wastegate is stuck open! i only have -10 on my vacume guage and i think that might be a problem due to my cams... has anyone had this problem before?

 

[donniekak]

Make sure the vacuum line is hooked up to the right side of the diaphram.

 

[myturbo]

Make sure the vacuum line is hooked up to the right side of the diaphram.

yes, i think he hooked it up wrong,,,simple easy mistake.

 

[my98gsx]

nope... i thought people were going to say that. its connected correctly. the vacume goes to the side port and the top is vented to the atmosphere just like the instructions said. i checked this a few times. im lost...

 

[jo1]

Even the pressure hose install incorrectly it should not leak at idle. Make sure you install the valve seat that come with the wastegate..

 

[rush2252]

http://www.dsmtuners.com/forums/newbie-forum/313246-vacuum-idle-big-cams-272-280-a.html

Kolby

SBC guys have had this issue for awhile. Some people have brake booster problems on power brake setups with large cams

 

[my98gsx]

i opened the tial box, installed the vacume nipple and bolted it to my manifold. i never opened it up or took the housing apart yet. so i dont think the cwastegate is the issue at this point... the only thing i can think of is like a BOV, if the spring tention is not great enouph it opens... well isnt this the same with a wastegate? i think they come with a tiny 6lb spring. this wastegate is on a 2.3 stroker bored .040 so its alot larger then a little honda engine ( the only thing i can see running only 6lbs of psi ) I think im going to have to buy some other springs for this thing.

 

[jo1]

Just pull out all the pressure hose attached to the wastegate and see whether it still leaking or not. If it install correctly with all the hardware it should not leak at idle even with 6lbs of spring and super duper engine capacity unless the valve is jammed open all the time.

The BOV work with vacum but the wastegate work with pressure.. see where you source the pressure.

 

[my98gsx]

its such a simple install... i pulled off the vacume line and its still wide open... other then bolting it up to the manifold there is nothing to mess up... its attached correctly i dont understand why this thing is dumping constantly

 

[jo1]

Then you need to check whether the valve seat install correctly.. just open the inlet clamp and see whether it there..

 

[donniekak]

Take it off and see if there is a steel ring in the end of it that goes against the manifold.

 

[andy4g63]

How do you know it is leaking??? Is the valve seat there??? These things are almost impossible to push open with hand... Are you sure you have a spring/springs inside at all??? Check this thrad, if you have more ???'s, LMK.

http://www.dsmtuners.com/forums/new...al-40mm-external-wastegate.html#post151822302

 

[my98gsx]

woah woah woah now i feel like an idiot...when the wastegate came it had a piece of tape over the manifold side, which held in a steel ring... ( i thought this was only for mounting so i didnt use it.. should that be inplace still?

 

[andy4g63]

That is the valve seat, I was talking about. It helps create perfect seal around the valve. If it isn't there WG leaks/it bypasses the turbo already a little. It leaks at idle too.

 

[slowgsr]

That is the valve seat, I was talking about. It helps create perfect seal around the valve. If it isn't there WG leaks/it bypasses the turbo already a little. It leaks at idle too.

Its actually called a fire ring and yes its essential to proper operation of your wastegate, please install it.