DIY Turbo install in progress

[LowR3V'in]

^^^ not true, blow off valves are designed to protect the tb and engine from compressor surge.

wtf

[ForcedFirebird]

It's to protect the tubo compressor. The air becoming static between the compressor and throttle plate causes unnecessary stress on the blades and can ruin it over time.

[norcalE30]

^^^ not true, blow off valves are designed to protect the TB and engine from compressor surge. This happens at high boost levels when the butterfly is quickly shut, pressure buildup can actually break it off and blow it into the intake. This has nothing to do with protecting the turbo itself. BOV's have nothing to do with lag

[NINE31]

BOV is not there to protect the throttle body. That may be one of its purposes, but the main purpose is to protect the turbo compressor from compressor surge. The throttle body snaps shut the air bounces off the TB butterfly and back towards the turbo, which as a result can slow the compressor wheel, creating lag among other things.

There is theory on both ways, close to throttle body and close to turbo. Many stock turbocharged cars have the BOV built into the turbo compressor housing or very close to the turbo, what does that tell you?

You can put it near the turbo, and recirculate it which would be most beneficial.

[ForcedFirebird]

Holy old thread batman! 1yr and no updates?

The main reason one would desire to put the BOV closest to the TB is to keep the air moving in the same direction, rather than reverting off the TB throttle plate back to where ever the BOV is mounted. Either way it works just fine, since it's there to keep the revision from making it all the way back to the compressor wheel.

[E30Eric]

Nice setup! How was the mani only 379? It says 490 on the 666fab website. I will be ordering one soon myself.

[wwwayn]

any more infor.how's the car now.

[blueapplesoda]

it don't matter how old the thread is we add more info than its good.

[blueapplesoda]

You can also use a restrictor that fits in one of the fittings in the line. We made one in a lathe and drill press for the wreck racing car.

yeah that works too, and is what i eventually did. i just had the parts laying around at first so it works.

you can buy a -4an male to a -3an female from any AN parts supplier. or through me haha.

Derek

[88driftIS]

damn just noticed how old this thread is...

[88driftIS]

The bov needs to be as close to the tb as possible. This is where the pressure first starts to build. I know it's only split second difference but having it closer to the tb will get rid of the air faster and more efficiently. Or you could just run two bov's.

[Fuel4blood]

Subscribed, super informative thread. Can't wait to see the finished product. Thanks for taking the time to write this up. Your bimmer looks nice as well.

[nineohfour]

the BOV should be as close to th TB as possible, after all thats the main part it's there to protect.

[e30 power]

nice man

whats done to the motor???

[iNetForce]

Awesome DIY! It shows that you have experience, clean up!

I was amazed about the idea of having the BOV closer to the turbo. The first and last turbo setup I did I put the bov just next to the TB.

The learning process never stops, will put it next to the turbo next time!