Compressor Surge

[niterydr]

Real compressor surge comes from the compressor and happens when a turbo makes too much boost at too low of an RPM. It's common to see if on 61mm turbos without anti-surge comp housing when running 20+psi on a 2.0l. They often surge bad when during spool in the 20-30psi range in the mid RPMs.
This.

As others have stated, the BOV has nothing to do with the killing of your turbos. I would start by looking into your oiling system. Maybe you have too much/not enough oil pressure at the turbo?

and this.

How is your feed line? That E16g failure description sounds like a failed thrust bearing on the turbo.

[scheides]

I'm jumping on the oiling bandwagon too, is your oil feed from the head or from the oil filter housing?

If your car is compressor surging, it's generally moderatly violent. Here's a good idea: LET OFF THE GAS PEDAL! obviously just staying in it will just make it keep happening and be harder on everything. Generally you can get around compressor surge (if that is what you are truely talking about) by just letting off the gas a little and accellerating part throttle through the surge rpms and full throttle after that.

Have you considered a 1.8 sohc swap? ;)

[iceminion]

Yeah, the 1.8 is awesome, i really want to do the 1.6 DOCH swap into something, same bore, really short stroke, like 80mm or something. good for 10,000+ rpms

The feed line is completely stock.....where would one begin to troubleshoot?

Would you recommend using the oil feed line from the housing for this?

My SC61 is fed from the oil filter housing....I spose if my thrust bearing goes out on my SC61 then we can rule out oil feed issues. (yes, I have a full 5 qts of oil in there)

[Shane@DBPerformance]

Are you feeding it clean oil or possibly dirty pre-filter oil from the oil filter housing?

[scheides]

The feed line is completely stock.....where would one begin to troubleshoot?


Check your feed line for blockage, make sure it flows fluid easily.

For that matter, check your turbo drain tube, perhaps its filled with RTV?

[iceminion]

the 14b and the E3-16g had their own feed lines, and their own return lines (one is -8 AN)

However the head could be the issue, I have no way of knowing if there is enough oil coming out of the feed line, is there an easy way? get an oil pressure sender unit and attach it to the turbo feed line?

[scheides]

I guess! Otherwise just order a oil housing feed line and seal up the stock location.

[desolate]

I did the same thing and crushed the 1g bov. It held boost like no tomorrow, however during low boost shifts it would flutter crazily. I ended up building very exessive shaft play quickly, blowing 3 turbos, and almost blew up my scm61 (it has some in/out play now and my assumptions are from the back lash flow from the fluttering).

Since then I've changed to a twin bov setup, back to the stock 1g bov (unmodded) and a greddy. The turbo I have in now which is an ebay 16g knock off has lasted 4 months and 4,000 miles going strong. The shaft play is exactly the same as when I put the turbo on.

imo any bov flutter = your turbo is going bye bye soon.

[Kevin 1G Drummer]

Why are you running two BOV's? And I've been running a Tial on my car for 2 and a half years now and anything under 11 psi it flutters. My turbo is still just fine.

[4seasons69]

I've been running a cheap turbo xs for 8 months and under 10psi it flutters and my turbo is fine and has very little shaft play.