Blow off valve

[quattrorunner]

I need a blow off valve. I have efi. I want one that sounds cool. I'm confused with all the offerings. I'd like guidance but don't feel I should pay porsche prices just because I have a Porsche. What should I get if there is a preference and why? Leaning toward tial but dang.

[Ken911]

turbo smart makes very good ones. i got two of them for my motor along with two waste gates. same or better quality than a tial and a fraction of the cost.

[16Volt]

Tial. Forge.

[quattrorunner]

50mm?

[Oyagi]

Can an old, stock 930 sport a BOV like the cool cats?


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[quattrorunner]

Stock 930 needs a diverter valve. Your car has an old school overly complicated type.

[kenikh]

Fabspeed bypass pipe and a Forge


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[Oyagi]

So you're saying it can be done?


1987 930 Guards Red

[OldSpool87]

I have Forge diverters on my wagon. Very nice build quality and just the right amount of noise.

['76 911S 3.0]

I have a TurboSmart RacePort v2, 50mm...haven't heard it yet as I'm still finalizing things but it's nice and compact and they make a version to fit the TIAL flange if you have that configuration already. IMO, the TIAL 50mm is slow and excessively bulky. The RacePort v2 dropped 46% of the mass from their v1 version and it fits well in tight spaces like a 911 engine compartment.

This is the valve, albeit on a 2JZ, but with a very similarly sized turbo to the one I am using:

https://youtu.be/1p2O_Qz7jNs

[RarlyL8]

Can an old, stock 930 sport a BOV like the cool cats?

Yes this is not an uncommon mod. A couple of ways to do it, swap out to a long neck intercooler or fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing. You can use whatever small type aftermarket BOV you like at that point.

[Oyagi]

Originally Posted by RarlyL8

Yes this is not an uncommon mod. A couple of ways to do it, swap out to a long neck intercooler or fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing. You can use whatever small type aftermarket BOV you like at that point.

Well, I'm planning to keep my intercooler the way it is. Can you fab me up one with the bov? Looking for simple plug and play I can install myself out of the box. I'm still getting tons of compliments for your exhaust !


1987 930 Guards Red

[Tippy]

I have an old HKS from the '90's on mine. 1.5" port.

Works just fine. Doesn't that have that ricer sound, thankfully.

[Mocker]

Originally Posted by RarlyL8

...fab an adapter for the short neck. The 930 BOV is replaced by the much smaller 965 style BOV and plumbing...

'zactly what I've got...

[quattrorunner]

Originally Posted by Tippy

I have an old HKS from the '90's on mine. 1.5" port.

Works just fine. Doesn't that have that ricer sound, thankfully.

I like the yellowbird blow off sound.

[quattrorunner]

2:10 and 2:16

[1979-930]

^^^ That high pitched whine would drive me bonkers.
I like the air release noise of the other one better.

[Mocker]

I don't want to hear the BOV at all.

[xbmwguy]

Regardless if you want the sound or not, venting to atmosphere will enhance the flamethrower effect !

[quattrorunner]

I've been in a 930 with the pshhh sound and I agree it could get old.