TurboXS RFL Low-Boost Surging Problem.

[johnathan1]

I just installed my 57 trim upgraded CT, and I am getting some compressor surge (flutter) when i boost very little (1-5psi) and let off I hear a fluttering...but if I boost to 10psi, the BOV blows off as it should...

The BOV would blow-off perfectly when I was running the stock CT26...even at low boost pressures...I also took apart the BOV, which was a bit dirty, and cleaned it all out, and oiled the piston and cylinder...also there were no adjustment washers in it that I could see. The piston sealing surface also had some very hard buildup on it, almost like a carbon deposit...I scraped some of it off with my fingernail...but couldn't get all of it off...any ideas? Could the problem just be the bigger turbo is flowing more air at a lower psi, and needs a softer-springed BOV?

Thanks guys!

-John

EDIT: The cylinder walls inside the BOV looked a bit scored up as well....its a pretty old BOV.

 

[Datsrboi]

I think your suppose to add washers into it just like you would screw the HKS bolt in all the way. That bigger turbo is probably too strong for the light spring so yeah. I know when my friend had his we had to add washer into it to compact that spring more but not for the same reason of yours.

Sorry if I am not using the right "terms"

 

[johnathan1]

But if it's surging...wouldn't I would less pressure on the spring?

 

[suprafanatic]

ya thats weird, its not pushing hard enough to open it enough to let the pressure out.

 

[johnathan1]

Maybe a vacuum leak, or bad BOV? I checked all of the vac lines to the BOV, and they are all free of any obstruction. :\