hey guys. I got a greddy FMIC setuo and it did not come with a flange for a BOV. I will be adding one ina bit, but my question is if it will help keep my TUrbo spooled better gear to gear? It seems my turbo always needs to respoolup gear to gear.

 

The turbo will always have to respool between shifts, its because you've fallen out of boost range, or just lower in it.

I've heard a BOV can help reduce spool times, but that's about it.

(First post. Lurked for a while though)

 

Actually, no, the BOV hurts spool.

The BOV's primary responsibility is to prevent turbo damage from compressor surge.


-Ted

 

Ah, i forgot about that. On that same note, won't it also take stress off the TB?

 

Good piont. But without it, doesnt the throttle body closing on a spinning turbo slow down the wheel?

 

Yes it'll slow it down to the point where the compressor wheel actually reverses rotation, hence the "compressor surge" Ted mentioned. It also has another benefit, in that while relieving the pressure in the charge pipes, it also reduces manifold pressure, avoiding a potential lean condition between shifts.

 

Thanks.

 

So where would be the best place to mount the bov. On turbo side or intake side??? I keep hearin things back and forth for both

 

Stock recirculating BOV's are for reducing noise. Open-vented aftermarket BOV's are for attracting attention.

If you really needed a BOV to prevent turbo damage, professional endurance race teams would need to use them, and yet they don't...

 

No but they do use popoff valves.

 

I've also been learned that the less than 1/4 second shift time most of those cars have coupled with the pop-off valve keeps the surge from ever reaching the compressor.

 

Then you'd see them on transport trucks that drive for millions of miles

 

Diesel is an entirely different scenario altogether.

 

Completely different thing. Completely different purpose. Completely different discussion...

Diesels don't have throttles. Do you see why this makes your comment a little silly?