BEGi Shanghai-S Installed but Overboosting - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 07-11-2009, 10:39 PM   #1
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default BEGi Shanghai-S Installed but Overboosting

So I just installed my BEGi Shanghai-S kit last night. It went pretty well except one of the bolts on the flange at the bottom of the stock manifold got stuck and I had to saw the pipe in order to remove it. Drilling the oil pan was kind of frightening, but I survived, haha.

I immediately hooked up my friends LM-1 wideband, and got the AFR's pretty close to where they need to be, but even with the AFR's looking good I was getting pretty bad detonation when I got into boost. I didn't have a boost gauge last night so I couldn't tune it any further last night.

Then, This morning I buy a cheap sunpro boost guage from autozone, and hooked it up.
I immediately found out why I was fighting detonation, when I get into the throttle the boost shoots up passed 10psi, I never got a chance to see how high it would go because I let off as soon as I saw the boost going that high. I tried making a pull several times, and every time is zipped right up passed the 10psi mark.

I just tried lengthening the wastegate actuator a bit, but I could only screw it out a few turns before it was getting real loose like it was at the end of its threads.

So basically, WTF is going on? The instructions for the shanghai-S say that the turbo comes with a 5psi wastegate.
Is it possible BEGi sent me a turbo with a 12psi wastegate on it? lol


oh, and heres pics:

IMG_5775_small.jpg

IMG_5704_re_small.jpg

IMG_5707_re_small.jpg

IMG_5722_re_small.jpg
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-11-2009, 10:44 PM   #2
Elite Member
iTrader: (15)
 
Join Date: Sep 2007
Location: Incline Village, NV
Posts: 2,073
Total Cats: 5
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
.
Is it possible BEGi sent me a turbo with a 12psi wastegate on it? lol

Yes
thesnowboarder is offline   Reply With Quote
Old 07-11-2009, 10:47 PM   #3
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by thesnowboarder View Post
Yes
Why would they do that when I order a non-intercooled kit with an FMU, my setup could never support 12+ psi.
I was aiming more for like 5-6 psi...
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-11-2009, 10:47 PM   #4
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Its my opinion that overboosting is god's way of telling you to ru more boost.
neogenesis2004 is offline   Reply With Quote
Old 07-11-2009, 11:19 PM   #5
Elite Member
iTrader: (15)
 
Join Date: Sep 2007
Location: Incline Village, NV
Posts: 2,073
Total Cats: 5
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
Why would they do that when I order a non-intercooled kit with an FMU, my setup could never support 12+ psi.
I was aiming more for like 5-6 psi...
An accident? They are only human. Call them.
thesnowboarder is offline   Reply With Quote
Old 07-11-2009, 11:21 PM   #6
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

I tried earlier but I suppose theyre closed on saturdays.
Ill call them on monday.
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-12-2009, 12:14 PM   #7
Senior Member
iTrader: (6)
 
tyson87's Avatar
 
Join Date: Aug 2008
Location: West Palm Beach, FL
Posts: 1,023
Total Cats: 1
Default

mine also over boost.
i wanted to run 7lbs but once u hit 14 u cant go back down that low...
tyson87 is offline   Reply With Quote
Old 07-12-2009, 10:17 PM   #8
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by tyson87 View Post
mine also over boost.
i wanted to run 7lbs but once u hit 14 u cant go back down that low...
youre shanghai wastegate wouldnt open till 14psi? lol

im hoping i can get a lower pressure wastegate or figure out what the problem is, it cant stay like this
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-13-2009, 12:11 AM   #9
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Do you have a shop compressor? If so, just use the regulator to control the pressure and test the wastegate that way. Use an air nozzle and press it into the hose. Slowly turn up the pressure bit by bit on the regulator and see at what pressure the wastegate opens all the way.

A bicycle pump can work too, just have to figure out how to attach it to the vac line.
ZX-Tex is offline   Reply With Quote
Old 07-13-2009, 03:44 PM   #10
Former Vendor
 
Join Date: Jun 2006
Location: Bell Tuning & Performance
Posts: 1,338
Total Cats: -78
Default

There is no possible way we sent the wrong actuator with a Shanghai turbo, sorry. We re-use the actuator it comes with, and the Garrett one does not fit without modification. It is a 7 psi actuator that is adjustable. You need to keep adjusting the arm length until the boost level drops. If that does not work, call Corky or Tim and they can come up with an extension for you.
Stephanie
Stephanie Turner is offline   Reply With Quote
Old 07-13-2009, 04:06 PM   #11
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,058
Total Cats: 11
Default

Could be a China quality control issue? Have the wastegate loose and check boost. If you get near zero boost, you know it's the wastegate. It the signal line to it ok?
Laur3ns is offline   Reply With Quote
Old 07-13-2009, 04:15 PM   #12
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Ive ran the car with the actuator rod disconnected and it doesnt build any boost, the wastegate opens up. But with the actuator connected but screwed almost all the way out Im still seeing the boost go sky high. Im not sure when the wastegate is opening because I get scared and let off around 10.
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-13-2009, 05:40 PM   #13
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

Quote:
Originally Posted by Stephanie Turner View Post
There is no possible way we sent the wrong actuator with a Shanghai turbo, sorry. We re-use the actuator it comes with, and the Garrett one does not fit without modification. It is a 7 psi actuator that is adjustable. You need to keep adjusting the arm length until the boost level drops. If that does not work, call Corky or Tim and they can come up with an extension for you.
Stephanie
Uhm. That doesnt sound like a solution. Just a bandaid.
Saml01 is offline   Reply With Quote
Old 07-13-2009, 06:57 PM   #14
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Im about to go try threading the actuator out as far as I can, I guess Ill lengthen it until I just have to put a little bit of tension on it to get in to slip over the lever pin, that way it will hopefully still seal up.

Ill report back if this fixes it, but Im not really expecting it to fix it.
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-13-2009, 07:09 PM   #15
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Yeah try it with just enough tension to hold the WG shut like you described above. You can probably get away with just 3-4 threads of engagement if it has a locknut on it.
ZX-Tex is offline   Reply With Quote
Old 07-13-2009, 10:14 PM   #16
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Quote:
Originally Posted by ZX-Tex View Post
Yeah try it with just enough tension to hold the WG shut like you described above. You can probably get away with just 3-4 threads of engagement if it has a locknut on it.
Alright I just tried it, and the wastegate is now opening at 8-9 psi, which is better because I know its actually opening, but its still too much boost.
I set it so theres just a tiny bit on tension holding the wastegate closed, I dont really think I can go any looser without having the wastegate leak, which will kill spool... so yah...

oh also, I did a little pull in 4th to get a general feel for spool, I was getting 5psi by 3000 rpm and 8psi by 4000 rpm. Im running the racing beat mid pipe and the racing beat power-pulse muffler.
Ill get some real data soon for the spool-up data thread.

Last edited by Full_Tilt_Boogie; 07-14-2009 at 12:23 AM.
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-14-2009, 10:36 AM   #17
Senior Member
iTrader: (6)
 
tyson87's Avatar
 
Join Date: Aug 2008
Location: West Palm Beach, FL
Posts: 1,023
Total Cats: 1
Default

Quote:
Originally Posted by Full_Tilt_Boogie View Post
Alright I just tried it, and the wastegate is now opening at 8-9 psi, which is better because I know its actually opening, but its still too much boost.
I set it so theres just a tiny bit on tension holding the wastegate closed, I dont really think I can go any looser without having the wastegate leak, which will kill spool... so yah...

oh also, I did a little pull in 4th to get a general feel for spool, I was getting 5psi by 3000 rpm and 8psi by 4000 rpm. Im running the racing beat mid pipe and the racing beat power-pulse muffler.
Ill get some real data soon for the spool-up data thread.
u need an intercooler.
tyson87 is offline   Reply With Quote
Old 07-14-2009, 11:47 AM   #18
Junior Member
 
Join Date: Mar 2008
Location: miami fl
Posts: 116
Total Cats: 0
Default

yeah, get an intercooler and you'll be alright until you upgrade to some fuel management
oops2low is offline   Reply With Quote
Old 07-14-2009, 12:03 PM   #19
Elite Member
Thread Starter
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,682
Total Cats: 216
Default

Yah I think so. My buddy just built his D16 in his civic and is going for big boost, so Im going to see if I can get his old intercooler for him, since Im sure hes going to need a bigger one.
Ill take some measurements first.
Full_Tilt_Boogie is offline   Reply With Quote
Old 07-14-2009, 01:04 PM   #20
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

That or just add some water injection. Cheaper and easier than an IC, and should be fine for what you are doing.
ZX-Tex is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:25 PM.