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-   General Nissan R35 GT-R Chat (https://www.gtr.co.uk/forum/general-nissan-r35-gt-r-chat.html)
-   -   GFB BOV's (https://www.gtr.co.uk/forum/518338-gfb-bovs.html)

yasgtr 12th June 2017 05:03 PM

GFB BOV's
 
Hi all just fitted my BOV's, do they impact fuel, I'm only running stage 1 everything else is stock apart form y pipe.

Thanks

snuffy 12th June 2017 08:06 PM

Never mind fuel, can you hear them ?

Stealth69 12th June 2017 08:51 PM

Poooooooointless!!!!

yasgtr 12th June 2017 09:15 PM

Quote:

Originally Posted by snuffy (Post 5326514)
Never mind fuel, can you hear them ?

sound amazing really happy with them

snuffy 12th June 2017 09:58 PM

Quote:

Originally Posted by yasgtr (Post 5326649)
sound amazing really happy with them

I had dump valves on previous cars and I loved the sound. But I do wonder how much I'd be able to hear them given the GTR's quick gear change and my silenced exhaust.

yasgtr 12th June 2017 10:00 PM

I'm running stock exhaust and got them fully atmospheric.

Stealth69 12th June 2017 10:46 PM

They only sound off on lift off, they don't do anything on gear change on this car

yasgtr 12th June 2017 10:51 PM

Quote:

Originally Posted by Stealth69 (Post 5326841)
They only sound off on lift off, they don't do anything on gear change on this car

correct.

snuffy 12th June 2017 11:30 PM

Quote:

Originally Posted by Stealth69 (Post 5326841)
They only sound off on lift off, they don't do anything on gear change on this car

I see.

On my last 2 cars with dump valves you could slow your gear change down for maximum noise. I've always wondered about the GTR when it's in control of gear change.

charles charlie 13th June 2017 07:32 AM

Quote:

Originally Posted by Stealth69 (Post 5326841)
They only sound off on lift off, they don't do anything on gear change on this car

Gearchange is so quick that there's never a real moment where the throttles close and a BOV is required.

It's also the reason why your MAF tuned GTR doesnt drive like crap using VTA BOVS.

Personally I think you're risking bore wash, fuel into oil contamination, crapped up spark plugs when to VTA on a MAF tune.

Go SD if you want VTA with no risk.

Back to OP question... you're risking a slight increase in rich running when off throttle as the standard tuning method is MAF and the ECU has already injected the correct amount of fuel for the metered air, so when it's blown off you run rich.


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