BP turbo build/advice

Boosted Performance · 04-10-2020, 10:54 PM

Quote:

Originally Posted by hc_416

well..... another problem came up.

My first two rides went great; on my third ride I went to give it full throttle and it fell flat on its face. No boost, and a lot of lag. I didn't want to push it after that so I took it home. It now just doesn't build boost anymore if at all and when I give it gas it falls on its face. It will build boost at random times or when I go first to second 3/4 throttle it seems to work, then when I hit third it just dies. Really looking for ideas what it could be or what I should look at. Here is a list of things that have been tired,

1. Put a new hose and stiffer spring on the BOV
2. Check to see if the turbo is spinning free with my hand(it is).
3. I checked both waste gates to see if they were stuck open and they would work when given pressure. I just pushed on the valve with my finger.
4. I reran the vacuum hose with new z1 line.
5. I have looked for leaks on the cold side by looking at the t-bolt clamps and trying to move them with force. I also checked to make sure they were tight.

I think I will take the cold side apart and check to make sure i put it on tight but any suggestions would be appreciated.

Don't put a stiff spring in the BOV. The engine vacuum at idle, when warm is what determines your BOV spring. Putting a stiffer spring than the vacuum can open, will cause issues.

Double check that your wastegate lines are connected properly. That is more than likely your issue. TB port to lower ports of the wastegates, and make sure all other ports at the bottom half of the wastegates are close. Leave one port open at the top. There is something wrong there for sure.

hc_416 · 04-11-2020, 09:52 AM

Quote:

Originally Posted by Boosted Performance

Don't put a stiff spring in the BOV. The engine vacuum at idle, when warm is what determines your BOV spring. Putting a stiffer spring than the vacuum can open, will cause issues.

Double check that your wastegate lines are connected properly. That is more than likely your issue. TB port to lower ports of the wastegates, and make sure all other ports at the bottom half of the wastegates are close. Leave one port open at the top. There is something wrong there for sure.

I'll check again, but i have the lower ports connected and the top ports open to air. I didn't check to make sure all the plugs are in. Great idea, Just to make sure I used a 5mm silicon hose for the vacuum, that is appropriate correct? Also shouldn't the gate work with just spring pressure if there is no pressure at the bottom of the port?

jwick · 04-11-2020, 10:30 AM

Quote:

Originally Posted by hc_416

I'll check again, but i have the lower ports connected and the top ports open to air. I didn't check to make sure all the plugs are in. Great idea, Just to make sure I used a 5mm silicon hose for the vacuum, that is appropriate correct? Also shouldn't the gate work with just spring pressure if there is no pressure at the bottom of the port?

No. If you aren’t applying pressure to the bottom port of the gate it would never open. The WG opens based on turbo pressure, or manifold pressure, depending on where you are taking the source. The exhaust gasses in the piping, pushing on the valve seat of the WG, are basically at atmosphere since it’s open all the way out of the muffler. That’s simple hydraulics.

Boosted Performance · 04-11-2020, 10:33 AM

^^^^ Correct

Kit comes with 6mm silicone hose, but 5mm should not make a difference.

hc_416 · 04-11-2020, 02:34 PM

Quote:

Originally Posted by Boosted Performance

^^^^ Correct

Kit comes with 6mm silicone hose, but 5mm should not make a difference.

I did get five and its really tough to get it on, I might just get a 6mm. even that is a little tight. Would that cause the gate not to work?

hc_416 · 04-11-2020, 02:34 PM

what are the best spark plugs to get for the kit, is it still the gtr plugs?

Boosted Performance · 04-12-2020, 11:11 PM

Quote:

Originally Posted by hc_416

I did get five and its really tough to get it on, I might just get a 6mm. even that is a little tight. Would that cause the gate not to work?

6mm (1/4") is the correct size.

Quote:

Originally Posted by hc_416

what are the best spark plugs to get for the kit, is it still the gtr plugs?

GTR plugs.

hc_416 · 04-13-2020, 10:20 PM

Quote:

Originally Posted by Boosted Performance

6mm (1/4") is the correct size.

GTR plugs.

I took off and popped open the waste gates again. I redid the clocking of the gate, clean the cap,s off and put on new tape, etc... One of the diaframes looks to have three creases and I would like to replace it. I measured the valve and it came out to 38 mm, I want to make sure that is the correct size so I order the right part. Once again thanks for all the help BP!

Boosted Performance · 04-13-2020, 11:34 PM

Quote:

Originally Posted by hc_416

I took off and popped open the waste gates again. I redid the clocking of the gate, clean the cap,s off and put on new tape, etc... One of the diaframes looks to have three creases and I would like to replace it. I measured the valve and it came out to 38 mm, I want to make sure that is the correct size so I order the right part. Once again thanks for all the help BP!

Contact Tial, these are MV-S wastegates. They will all have the same internals.

hc_416 · 04-14-2020, 10:46 AM

thank you again

here is there website for part numbers

http://tialsport.com/documents/EXPLODED%20MVS.pdf

Here is there actual website to buy the parts,

https://tialsport-outlet.com/

these are all from tial so you know you are getting legit parts, which is a big deal to me.

hc_416 · 05-19-2020, 05:21 PM

Well.... I have fixed the problem... by getting two new waste-gates. The waste-gates were pretty beat up. I bought new o' ring's, diaphragms, and new springs, but it still wouldn't seal right. Seems like sitting for 9 months just made them trashed. Either way she is up and running and good to go. I'll post a vid of what they waste gates look like. Is it normal for gate to go after around 4 years?

Gooch · 05-20-2020, 12:39 PM

Quote:

Originally Posted by hc_416

Well.... I have fixed the problem... by getting two new waste-gates. The waste-gates were pretty beat up. I bought new o' ring's, diaphragms, and new springs, but it still wouldn't seal right. Seems like sitting for 9 months just made them trashed. Either way she is up and running and good to go. I'll post a vid of what they waste gates look like. Is it normal for gate to go after around 4 years?

How were they beat up? The housings were physically trashed? Glad you got it figured out..

hc_416 · 05-20-2020, 02:32 PM

Quote:

Originally Posted by Gooch

How were they beat up? The housings were physically trashed? Glad you got it figured out..

gates would stay open, diaphragm was creased, both lips on the waste gate were a little warn down, the o-rings that seal the top part of the gate to the bottom was dried, ETC..

hc_416 · 05-20-2020, 02:33 PM

Well the CSF rad's time is up. What is everyone doing for rad's now? Should i go back to OEM or did a good reliable one come out yet?

Hotrodz · 05-22-2020, 10:33 AM

Quote:

Originally Posted by hc_416

Well the CSF rad's time is up. What is everyone doing for rad's now? Should i go back to OEM or did a good reliable one come out yet?

Go OEM and be done.

Sent from my SM-G965U using Tapatalk

04-11-2020, 10:33 AM	#4 (permalink)
Boosted Performance The370Z.com Sponsor Join Date: Feb 2010 Location: Edmonton, AB Posts: 1,629 Drives: Z's Rep Power: 3383	^^^^ Correct Kit comes with 6mm silicone hose, but 5mm should not make a difference. __________________ 750WHP starting @ $7,500 to the door FOR DETAILS VISIT: http://www.the370z.com/members/boosted-performance.html FB: https://www.facebook.com/Boosted-Per...6303179791462/ IG @boostedperformanceyeg

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Turbo Build	davidson_z34	Forced Induction	33	11-12-2015 07:45 PM
Need Advice on Bottom End Build	604GZ	Engine & Drivetrain	5	04-07-2015 09:09 AM
Single turbo build	jlask370	Forced Induction	13	10-07-2013 12:41 PM
Need advice on stereo build....	mengel	Audio & Video	7	02-08-2011 08:24 AM

04-11-2020, 02:34 PM	#6 (permalink)
hc_416 Enthusiast Member Join Date: Aug 2013 Location: CT Posts: 254 Drives: g37 Rep Power: 12	what are the best spark plugs to get for the kit, is it still the gtr plugs?

04-14-2020, 10:46 AM	#10 (permalink)
hc_416 Enthusiast Member Join Date: Aug 2013 Location: CT Posts: 254 Drives: g37 Rep Power: 12	thank you again here is there website for part numbers http://tialsport.com/documents/EXPLODED%20MVS.pdf Here is there actual website to buy the parts, https://tialsport-outlet.com/ these are all from tial so you know you are getting legit parts, which is a big deal to me.

05-19-2020, 05:21 PM	#11 (permalink)
hc_416 Enthusiast Member Join Date: Aug 2013 Location: CT Posts: 254 Drives: g37 Rep Power: 12	Well.... I have fixed the problem... by getting two new waste-gates. The waste-gates were pretty beat up. I bought new o' ring's, diaphragms, and new springs, but it still wouldn't seal right. Seems like sitting for 9 months just made them trashed. Either way she is up and running and good to go. I'll post a vid of what they waste gates look like. Is it normal for gate to go after around 4 years?

05-20-2020, 02:33 PM	#14 (permalink)
hc_416 Enthusiast Member Join Date: Aug 2013 Location: CT Posts: 254 Drives: g37 Rep Power: 12	Well the CSF rad's time is up. What is everyone doing for rad's now? Should i go back to OEM or did a good reliable one come out yet?