Compressor Surge

[Tachyon]

Originally Posted by RLFebo

So what your saying is, that the people running the 14b's are having bov problems that causes the bov to either not open all the way or not at all, and the air is then stacking on your throttle plate and backing up into the turbo causing a "surge like" symptom, but is really not related to the turbo at all, instead is related to their bov/bpv. Makes sense. Stop crushing your bov on a 14b turbo you cant even really push that much pressure with a 14b to need that.

That's what I suspect was happening in my case. When I would operate the throttle by hand you could hear almost a rattle-snake-like scuffing of air hitting the compressor blades after you would close the TBV. It was most certainly coming from the turbo, and not the BOV (yet the valve was opening a certain amount even under 1 psi). Before I upgraded, I was consistently hitting greater than 270 KPA with my 14b (about 25 psi at our altitude) Uncrushed my stock BOV was leaking by 18psi so there was a need in my case for crushing.

[Febo]

Sounds like your vac source might of been bad then... i used to run a 14b at 20psi with stock un crushed bov with a dedicated vac line and I never heard the noises you refer too.

[Tachyon]

Originally Posted by RLFebo

Sounds like your vac source might of been bad then... i used to run a 14b at 20psi with stock un crushed bov with a dedicated vac line and I never heard the noises you refer too.

No it was a good dedicated vac line. I had a rather unusual 14b setup though... at any rate it doesn't happen on the new turbo so the question was more of an afterthought.

[lucasoil4u]

well its good you got it figured out. turbos are easy to rebuild. any questions pm me