Begi-s boost creep issues
#1
Begi-s boost creep issues
Basically I have a begi s kit no intercooler with the gt2560 and am having some boost creep issues. The wastegate is rated for 6 psi, but I am seeing boost in upwards of 10-11 psi. Right now i have overboost protection on my ms set at 7psi, but this is only a temporary solution so i can drive the miata around town. I don't feel like removing the turbo to have it ported so is there anything simple i can do to combat the issue.
#5
Read through this as well. Not exactly the same but some of the same issues might apply to you.
https://www.miataturbo.net/forum/sho...ht=boost+creep
https://www.miataturbo.net/forum/sho...ht=boost+creep
#16
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My BEGI-S kit (with a GT2560) should be ready this weekend and BEGI should have the turbine housing ported already. I'll take pictures of the wastegate area after I pick up the kit.
So, I think the DP is designed to bolt to the stock exhaust. I think I will install it initially with the stock system, then go get the 2.5"-3" system soon after. It would be interesting to do a before-after to look at several things, including boost curve behavior. I'll have MSI by then so I can log everything except horsepower. I could do something simple like a 3K-7K RPM timed run in 4th gear on a flat road.
I'll be happy to do a before-after HP run if someone else wants to pay for the dyno time
So, I think the DP is designed to bolt to the stock exhaust. I think I will install it initially with the stock system, then go get the 2.5"-3" system soon after. It would be interesting to do a before-after to look at several things, including boost curve behavior. I'll have MSI by then so I can log everything except horsepower. I could do something simple like a 3K-7K RPM timed run in 4th gear on a flat road.
I'll be happy to do a before-after HP run if someone else wants to pay for the dyno time
#18
Zx-tex. I strongly suggest you take your turbine housing off and take the time to port it. As hard as you plan to drive your car, it will be more than worth while to you.
#19
I exchanged e-mails with Corky a couple of times and he said the correct way to remedy the problem would be to port the wastegate, re-install the cat, or place a restrictor in the exhaust system somewhere. Installing the stock cat or placing a restrictor in my exhaust would be taking a step back so my only option is to port the wastegate. My boost creep issues are most likely linked to my test pipe and exhaust system. I know a few people running the kit with stock exhaust and the kit runs 6psi all day.
#20
I don't think this one is the downpipe. The BEGi-S downpipe has more clearance than any ever made. The flange is actually two welded together and the internal flange is completely open. It is the same flange we have been using for 10 years.
Corky has decided that we are going to port all turbos in an effort to reduce the chance of over boost. Hopefully it will do the trick.
Stephanie
Corky has decided that we are going to port all turbos in an effort to reduce the chance of over boost. Hopefully it will do the trick.
Stephanie