Any sustained turbo damage from this?

Onefast99gsx · 10-17-2005

Hi guys-

Well i found the culprit of not being able to boost past 19# Saturday at test/tune day. I knew i must of had a boost leak somewhere and was thinking it was in the piping so i didn't dink with it at the track. Here yesterday at home i found one of the vacuum lines that goes on a barbed nipple on the bottom of the Magnus was blown off. Yes, it has zip tie on it. I'll have to look into an alternative way of clamping them if zip ties aren't gonna work.

Anyway, that line is what feeds my BOV and the Hallman boost controller. I never thought of checking that line because i knew they were all zip tied. Plus it's a bitch to get at them because my coil pack is mounted right above it. Yesterday i went through all the dsmlink logs and in the very first run of the day just after the shift from 1st to 2nd you could see where it blew off. There was a sharp spike downward in about 4 or 5 values. Now i know if i see that again, what it was.

Do you think the turbo could have gotten damaged from not having a functioning BOV throughout the day? I was using NLTS so my throttle plate was never closing which was probably to my benifit.

Also, any ideas besides zip ties for the vaccum hoses?

Thanks.

Outlaw1 · 10-17-2005

Buick Grand Nationals don't come from the factory with BOV's. I ran rediculous boost (for a GN) for several years with no BOV and never had/saw any problems. I have a friend with T63-1 that's at least 8/9 years old and it has always been set to at least 20psi, never with a BOV. I'd find it hard to believe someone could hurt their turbo on a DSM because they didn't have a functioning BOV for a couple of passes.

Pushit2.0 · 10-17-2005

Not having a BOV will be hard on the turbo bearings and compressor wheel, but should not see damage after one day.

~John

Onefast99gsx · 10-17-2005

Thanks guys for your input. I looked at it on lunch at don't see any compressor wheel damage or anything of the sort as far as visuals go. I think i'm alright. I just sorta panic'd. Where i was using NLTS and keeping that butterfly plate open probably saved me some because the air still had a place to go.

Stupid of me for not catching that in the logs but now i'm that much smarter for next time which there better not be. It's plain as day in the dsmlink log now that i know what it is.

With 6-7 more psi of boost I should of been sitting somewhere in the high 11's for sure. I think i did pretty good at 12.441 @ 19#. 8 runs in and technically I never got to see what the car can really do. Makes me wanna goto Fun Day this weekend. I've made 20+ 60-90mph runs in the last 2 weeks and never had a problem with any of those hoses. Why it had to happen on a race day with the same conditions is beyond me.