Ok, when I am in first gear and I boost I only get like 4psi, then second gear I get about 6.5psi (what I should be at) The in third gear I get like 8-9psi. What is the deal here? What can cause this? What can I do to fix it? I have a drag 3 kit on my 99Si, tial wastegate with a .45 bar spring, turboxs boost controller set all the way to the negative.

 

if your boost controller is set to 0 you should not behitting 8-9psi with the tial .45bar spring..

 

I know that. Do you think maybe I have a tial that has a higher psi spring? How could i tell :confused:

 

If you open up the Tial you can tell by the colour of the spring. Green is .6bar and brownish red is .4bar.

 

unhook your boost controller and see how much boost you are hitting.. If you only hit 6psi then you may have something wrong with your boost controller..

if u hit 8-9psi u may have someting wrong with your wastegate or possibly u have a 8psi spring but i doubt that..


[Modified by DIRep972, 9:33 PM 12/4/2001]

 

TTT

 

Well I disconnected the boost controller and at partial throttle in 3rd I reached 10 psi, so shifted, hell it might of went higher. Could my wastegate be staying closed,Cause I don't hear that "exaust leak" sound from it like others say they hear.

 

are u talking about the sound of open wastegate? If u r not hearing that sound something is wrong and your wastegate is not opening.. You may have a bad wastegate or possibly the vacum lines are hooked up wrong.. make sure u check the install before u blame it on your wastegate though..


[Modified by DIRep972, 1:15 AM 12/5/2001]

 

Well the way I have it installed is the top port for the mbc the side port to the compressor housing, then the mbc tee'd into the line from the side of the wg to the cph. That's the right way, correct? What else could it be? The metal ring that goes into the bottom of the wg, which way does it go in? I still haven't opened it to see if I have the correct spring, I just undo the alan screws around the perimeter right?

 

AHAHAHAHAHA! HA! I found the prob (well I haven't tested but I know it's the prob) The line that comes from the wg to the compressor housing blew off, so the wg wastn't seeing any boost! HA! I found it! Thanks guys for the help. have one on me (but you'll have to buy it, I'm only 18 )

 

so did it work right when you plugged the vacum line back in? also what is the cph?

 

compressor housing ( I didn't feel like typing it) Well I didn't really test it out because it's raing kinda hard, but i did take it for a drive and I just realized that before I noticed the problem, I was hearing a airish kind of noise (which turned out to be the disconnected hose) And now I don't hear it. It was a bitch to get something that was going to hold the hose on, in the that little space, but I did it. I'll let you guys know what's up when I test it out tommorow, hopefully it's all good now.

 

zip tie all your vacum lines down just for extra security..

 

Damn it is still happening, What else could it be? After my car cools of enough for me to touch ****, I'm going to remove my wastegate and inspect it. Could it be anything else?

 

I think you have your vacum lines hooked up wrong.. you need to run a vacum from the side port to the compressor housing, then run another vacum from the top port to the MBC, then to a vacum source off the Intake manifold..

 

How would the way I have it hooked up affect anything?

 

I told ya man......
leave the top port OPEN. Arturbo AND Ben both told me to leave this open, so i would listen to them. the top port of your WG should remain open unless you have an EBC. my set ups is like this:

Side (rear) port of WG goes to my turboXS boost controller, which then goes to my vac line coming off my manifold. the hole on the side of the compressor i PLUGGED.

i have NO problems and my MBC works perfectly at the boost i set it at, no creep.

give it a try man, im telling ya

 

Here is how it's supposed to be hooked up. Zip tie your fittings. I know a guy that blew his **** because his Vac line cam off his WG......

 

He is right, with the MBC you need to leave that top port open.. plug the hole on the compressor and run it like this guy said.. It should work

 

Alright fellers, I'll give it a try.

 

maybe this should help you out. I called Tial products and they fax this one to me.

 

That's exactly how I have it except for the line that goes to the mani goes to the turbo compreesor. What is that little vent thing?

 

Just do what they are telling you...it works....

compressor housing is PLUGGED...do not use it.

Run a vacuum line from the INTAKE MANIFOLD to the boost controller...
then from the boost controller, run another vacuum line to the SIDE PORT
of the wastegate. Thats how you set it up. Do it like this and you will be fine...

 

Alright fellas, i did the damn thing, but i left the hose running to the compressor. Anyways, I tried it out and I'm hitting 5-6 psi like I should be, I also got to hear my tial for the first time. Is the tial supposed to sound like an exhaust under water? Or a gargling exhuast? It's kinda anoying sounding, right? Can't wait to build my motor, 10psi was fun!


[Modified by CleanSi, 9:02 PM 12/5/2001]

 

yea its supposed to sound like that. At first i did not like it either, but god do i love it know. It makes ur car sound like a beast, i had ur exact problem when i got my turbo installed too, to bad i didnt see this post earlier. It will grow on you, just watch on how many people say ur car sounds like a beast, i think everyone thats heard my car has said that, lol. You will like it, yea 10 psi is always better than 6. But i bet with the wastegate not working and they way you had it set, its just as quik now.