Cobalt SS: Project 25G
Payam on my setup I'm running the factory bc. And when James had my setup he was running an ebc and he didn't get any surge either. I think term is correct on his theory about the wg.
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GMtech is too arrogent IMHO. I do not like dealing with him because he will never admit he is wrong even if he is. John (09cobaltss1) gets my recommendation if you were not picking me. It should boost 22 psi or so with the 1.5 bar spring but if the rod is too short it will surge badly as it spools which could hamper its ability to build boost safely and properly which explains the 17 psi max you are seeing (assuming all leaks are fixed).
The turbo isn't spooling "too fast" for an MBC. There are plenty of turbo's that spool much faster with no issue. Could the EBC help bandaid the issue? Perhaps. As term said, loosen the wastegate rod and try it out again with the MBC still hooked up to eliminate any more variables. IWG's have never been my favorite, but you gotta do what you gotta do.
Going to go back to the damn WG. Trial and error. At least I've learned so much about my car and how to work on it's getting easier. Esp since my buddy got a lift at his shop, I can go there anytime I want. I was there till 4 am 2 nights ago when I fixed my lower charge pipe sensors etc.
You have a larger turbine than the 20g. My turbine is a 20g turbine. I get the same surging and im on a zzp mani, tial 38mm wg with 8.7psi spring, hallman pro mbc set to 23psi. I have not begun tuning yet tho so please nobody say its the tuner. I just want to know if i need to fix sonething before i begin tuning.
1st and 2nd gear no surge, 3rd a little, 4th and 5th are horrible
Any ideas???? In thinking i just need to up the wg spring
1st and 2nd gear no surge, 3rd a little, 4th and 5th are horrible
Any ideas???? In thinking i just need to up the wg spring
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Joined: 03-05-11
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From: Encino,Ca
You have a larger turbine than the 20g. My turbine is a 20g turbine. I get the same surging and im on a zzp mani, tial 38mm wg with 8.7psi spring, hallman pro mbc set to 23psi. I have not begun tuning yet tho so please nobody say its the tuner. I just want to know if i need to fix sonething before i begin tuning.
1st and 2nd gear no surge, 3rd a little, 4th and 5th are horrible
Any ideas???? In thinking i just need to up the wg spring
1st and 2nd gear no surge, 3rd a little, 4th and 5th are horrible
Any ideas???? In thinking i just need to up the wg spring
You have a td06sl2 turbine iirc. James was a t67. Mine is the small wheel wirh a td05
On a side note i need to do a boost leak check myself. I suspect im either leaking at those stupid 90* elbows at the tr12 ot my intake mani gasket. Ive got an extra intake mani gasket but i still have to take it off one last time so i was waiting to swap that out.
On a side note i need to do a boost leak check myself. I suspect im either leaking at those stupid 90* elbows at the tr12 ot my intake mani gasket. Ive got an extra intake mani gasket but i still have to take it off one last time so i was waiting to swap that out.
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From: Encino,Ca
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On your MBC do you have a spring pressure setting? On my truboost it has a spring rate which you are supposed to set to 1psi your factory spring pressure rate. So 9 psi on the zzp kit so I set it to 8. The higher the spring pressure I set it to the faster I can get the snail to spool up. However...if it is set too high it will cause surging and spiking of boost. Just throwing that out there.
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From: Encino,Ca
On your MBC do you have a spring pressure setting? On my truboost it has a spring rate which you are supposed to set to 1psi your factory spring pressure rate. So 9 psi on the zzp kit so I set it to 8. The higher the spring pressure I set it to the faster I can get the snail to spool up. However...if it is set too high it will cause surging and spiking of boost. Just throwing that out there.
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From: Encino,Ca
Here's a little pull today. Was about 80 degrees out second gear only... You can't hear the flutter too much cause of shitty youtube. If you put on some headphones maybe. It's much quicker flutter sound than before. W/e though 7.5k rpm redline too so 
perfect for you to post that. I just took a video about 15 minutes ago on my way home. 2nd and 3rd. put new plugs in with a smaller gap last night. helped my 2nd gear breaking up issue and also replaced valve cover gasket and purge solenoid.
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Joined: 03-05-11
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perfect for you to post that. I just took a video about 15 minutes ago on my way home. 2nd and 3rd. put new plugs in with a smaller gap last night. helped my 2nd gear breaking up issue and also replaced valve cover gasket and purge solenoid.
Cobalt ss 25g - YouTube
Cobalt ss 25g - YouTube
LOL, I was recording with my cell phone. It's pretty hard haha. Hopefully tomorrow it will change with less preload. I just don't want it to be worse and less power!
Hell. Should do what I do. Use a GoPro at wide angle and use a 3m mount on the dash bezel. Works so good. Sounds messed up cause I put the stupid waterproof back cover on cause I can't find my other cover. Boo.
Sent from my Samsung Galaxy S4 using CobaltSS
Sent from my Samsung Galaxy S4 using CobaltSS
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Joined: 03-05-11
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From: Encino,Ca
We'll see what happens. I got a new file for using my regular boost controller solenoid. Tomorrow morning I'm going to do my wg rod as well. And.... I'm going to check out a 335 I found.
