I cant get past 11 PSI, Why?

[jeff1234]

All,
In my recent change over to TII I have been unable to get past 11PSI. I have a Grainger valve with the strongest spring installed and the adjuster tightened all the way in. The supply line for the waste gate is hooked directly to the intake manifold. My Turbo is in good condition. My intercooler piping is 2 1/2 inch diameter ID. I am using a stock TII intercooler. I am experiencing blow by as I have posted in the exhaust forum. I am wondering if the large diameter and length of the I/C pipe is acting like a huge reservoir that the turbo cant refill fast enough. Shouldnt this thing boost to about 20 PSI with the waste gate closed?

Thanks, jeff1234

[JDAWG]

whats it do with the wastegate just unplugged

[jeff1234]

Thanks for your reply!
I dont know at this point and will have to wait until next week to test that theory. Lets suppose for a moment that it will excceed 15 PSI. (there is no overboost cutout in my particular chip) I would think that a hose being off the system someplace would be noticable. I have checked, none are off. So I am still looking for the answer to the same question.
jeff1234

[turbovanman²]

This test is safer, hook up the wastegate to manifold vacuum, no mbc, no restrictors and post up what happens.

[jeff1234]

TVM, will do, raining in southern wisconsin today, when it drys up I will run the car it will only take a couple of minutes.
jeff1234

[JDAWG]

yea with it unplugged it should fly way up and hit boost cut out, if you had boost cut out, not really safe to do with it eliminated unless you want 4 ash trays lol

[puppet]

All,
In my recent change over to TII I have been unable to get past 11PSI. I have a Grainger valve with the strongest spring installed and the adjuster tightened all the way in. The supply line for the waste gate is hooked directly to the intake manifold. My Turbo is in good condition. My intercooler piping is 2 1/2 inch diameter ID. I am using a stock TII intercooler. I am experiencing blow by as I have posted in the exhaust forum. I am wondering if the large diameter and length of the I/C pipe is acting like a huge reservoir that the turbo cant refill fast enough. Shouldnt this thing boost to about 20 PSI with the waste gate closed?

Thanks, jeff1234

If this is the case (bold type in your post) then you'll only see around 10 psi boost. What do you have the grainger hooked to? It should be in the line between the manifold and the WG Actuator.

[JDAWG]

I always ran mine from the nipple on the turbo right back to the wastegate and never had a problem

[puppet]

I always ran mine from the nipple on the turbo right back to the wastegate and never had a problem

I do too ... but you have to have it in the line regardless ..LOL.

[JDAWG]

I do too ... but you have to have it in the line regardless ..LOL.

right lol

[jeff1234]

Alright you guys, that was a very funny comment about the ash trays, I laughed out loud for real. My grainger valve is inline with the intake and wastegate actuator. I dont have an overbooost cutout but I do have a boost gauge, eyeballs and an accelerator foot that is wired to my brain, so I will punch it and let off as soon as the ashtrays come flying out of the oil pan. Do you think this will be OK? LOLOLOLOL
I will report the results soon.
jeff1234

[Force Fed Mopar]

What wastegate actuator are you using? A stock T2 will blow open around 15-16 psi normally but sometimes the spring gets weak I think. It doesn't have an adjustable arm on it does it?

If you hook the line directly from the intake to the wga w/o the grainger installed, it shouldn't boost past 5-6 psi.

[jeff1234]

FFMOPAR, I have a new WGA from T/U, non adjustable. Your suggestion that 5-6 psi corresponds with what Simon had to say, so I guess I wont be creating any ashtrays after all. Heh Heh! Thanks again for your help with the fender liners, I am very happy with them. jeff1234

[jeff1234]

Hello all, here's the update. I took the car out this afternoon after work. I disconnected the WGA line and plugged the port on the supply line from the intake. I got a good solid 13 psi, but no higher. Apparently the WG is being blown off the seat at that pressure. Thats OK for now, I dont need to go higher until next spring.
jeff1234

[cordes]

Hello all, here's the update. I took the car out this afternoon after work. I disconnected the WGA line and plugged the port on the supply line from the intake. I got a good solid 13 psi, but no higher. Apparently the WG is being blown off the seat at that pressure. Thats OK for now, I dont need to go higher until next spring.
jeff1234

The extra washers which come with the MP head bolts are great for shimming the WG to get 20+ PSI out of them.

[Force Fed Mopar]

Yeah I shimmed my T2 wga w/ head bolts, it ran 15 psi solid, I saw 16 a few times under WOT in 3rd gear in the mountains.

[shelbymonster]

Yeah I shimmed my T2 wga w/ head bolts, it ran 15 psi solid, I saw 16 a few times under WOT in 3rd gear in the mountains.

with 2 spacer i hit 30 + psi with a old t2 small can actuator

[jeff1234]

Hey all, I am missing something here. As I form a mental picture of my WGA I dont recall anyplace where I could install washers. Are you suggesting moving the WGA closer to the turbo by installing washers behind the mounting bracket?
Thanks jeff1234

[shelbymonster]

use washer between the turbo housing and the actuator bracket

[jeff1234]

Thanks for the info, thats not going to be fun to do with the turbo buried behind the intake. Well, its sucks to be me. LOL Jeff