The second car had a Tial 50 hooked to a slow responding vacuum source. It worked, but was slow to open. You could rev the motor, hear it surge 2-3 times and then see the BOV open.

This the what it did to the inside of the turbo from all the compressor surge -

The result was an obvious lack of power and heavy smoking out the exhaust.

So, today or whenever you get a chance, go outside, pop your hood and watch your blow off valve. It should open as soon as the motor comes off a quick rev and should be fluttering at idle.

If you here any surge try a couple of things before buying a new BOV.

Check the vacuum line going to the BOV and make sure it isn't crimped, but or in a bad location.

Spray some lube on the actual valve and see if it reacts quicker.

Adjust the hardness/softness of the BOV and see if it helps.

Replace a stiff spring with a softer one (11psi to 9 or 7)

If none of that helps and you still suffer from surge, it is time to start looking for a new blow off valve before you have to buy a turbo!

what turbo is this out of

Bingo.

This is a 3251 Precision unit...if you don't think surge did it, what would you say caused it? I am very interested in the answer becuase we would hate to have this happen again.

The turbo sits perfectly flat - the only known cause we could see was surge pushing and pulling against the thrust. Once we moved the vacuum source the BOV worked great.

Tempest Racing
inlinePRO
Hytech turbo setup for sale http://www.hondamarketplace.com/zerothread/2338363

i HIGHLY doubt compressor surge put THAT MUCH force on the turbo. especially when you said your only running 10psi.

[freak]in riot ^^^

2 Years and counting with no BOV and i still haven't had a problem.

Thermal Arc TIG Owners club #004

10 Second Club Tuned With CROME
10.51 @ 139.66
10.62 @ 138.96
10.71 @ 140.66

RIP Earl Laskey

Bardahl Racing Oil

thanks! at least someone here knows what theyre talkin about.

BOV isnt REQUIRED. yes it helps, yes the turbo may last longer.

but NO the turbo isnt just gonna go BOOOOOOOM instantly if you dont use one.

[freak]in riot ^^^

to kill a turbo in per say an hour as the OP suggested... I would say there was another issue besides an old sticking brand whomever bov.

Quote, originally posted by siblues »

Well we all know that surge will damage the turbo and not running a BOv will also cause damage.I am just wondering how long was the car running with the bov like that for it to cause this problem.I also highly doubt the Tial BOV did that but nothing is impossible either way this is the first time I have heard of a tial valve not working properly.

in the case of the tial bov reacting slowly... the valve was working properly, its sounds like the use and installation of it was not on par. which is I think what the OP was saying when he described possible contributing conditions to such a problem.

God bless the men and women of the U.S. armed forces.

Laskey Racing
Portflow
T1 Race Development
Bisimoto Engineering

I am there with you, no BOV here no probs. Joe Simpsons didn't run one neither did John Ferguson/James Innes on their race car, you can't just let up on the gas though full throttle lol

No BOV on what ?

But thinking a bov causing that damage... LOL, and you guys are a shop??? You dont have to have a BOV... anOn top of that having a malfunctioning one is more likely going to LEAK boost than not open and "[freak] something up".

Jesus wept.

Modified by extralargenog at 4:05 PM 5/14/2008

Kills forum was gay. Good riddance

check the oil feed and returns for blockage.

its been said in this thread numerous times. you do not NEED a BOV on a turbo car.

it HELPS. but it wont grenade a turbo like what you have pictured

[freak]in riot ^^^