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Hks bov

Hks bov

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Matt_C
Senior Member
291
23-08-2019, 10:01 AM
#11
Why would you need a BOV/dump valve on a supercharger? I thought the idea behind the BOV/dump valve was to expel unused charge air when the throttle is snapped shut, so it doesn't about-face and run back through a turbo charger, causing the blades to stall, and relieving stress on the bearings as a result?
Matt_C
23-08-2019, 10:01 AM #11

Why would you need a BOV/dump valve on a supercharger? I thought the idea behind the BOV/dump valve was to expel unused charge air when the throttle is snapped shut, so it doesn't about-face and run back through a turbo charger, causing the blades to stall, and relieving stress on the bearings as a result?

S
Banned
1,153
23-08-2019, 10:05 AM
#12
its so you get dump noise on full throttle gear change.
S
23-08-2019, 10:05 AM #12

its so you get dump noise on full throttle gear change.

Matt_C
Senior Member
291
23-08-2019, 10:08 AM
#13
Oh yeah I get it about the noise, just wondered if there was a reason for it like with turbo's is all.

Do you only get a chuff when coming off full throttle, or does it chuff when on part/half throttle too? Never had a S/C, but had a couple turbo's in the past, which would hiss or chuff depending how much charge air built up - full throttle it would vent fully, and part throttle, or lower in the rev range, it would hiss out when you lift off
Matt_C
23-08-2019, 10:08 AM #13

Oh yeah I get it about the noise, just wondered if there was a reason for it like with turbo's is all.

Do you only get a chuff when coming off full throttle, or does it chuff when on part/half throttle too? Never had a S/C, but had a couple turbo's in the past, which would hiss or chuff depending how much charge air built up - full throttle it would vent fully, and part throttle, or lower in the rev range, it would hiss out when you lift off

S
Banned
1,153
23-08-2019, 11:18 AM
#14
yeah its only really when letting off full throttle because the SC kits run such low boost and they have a bypass
S
23-08-2019, 11:18 AM #14

yeah its only really when letting off full throttle because the SC kits run such low boost and they have a bypass

JayJay1374
Senior Member
492
23-08-2019, 01:07 PM
#15
Does anyone know the outer diameter of the tte boost pipes? Just so I can order a T piece to join the bov to the system.

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JayJay1374
23-08-2019, 01:07 PM #15

Does anyone know the outer diameter of the tte boost pipes? Just so I can order a T piece to join the bov to the system.


http://www.facebook.com/Sxe10CrewUk
Stickers available!!!, PM me.

S
Banned
1,153
24-08-2019, 12:51 AM
#16
I've got a list at home with all the pipe diameters on, ill text you when I get home.
S
24-08-2019, 12:51 AM #16

I've got a list at home with all the pipe diameters on, ill text you when I get home.

toxo
Posting Freak
4,843
24-08-2019, 02:10 AM
#17
It's because it's an aftermarket supercharger. Factory installed superchargers are generally fitted BEHIND the throttlebody, so you would never get any excess pressure to vent. The blow off valve is not really nessecary (any excess presure generated is going to be pushing back against the supercharger screws and the belt motion, which is hardly going to bat an eyelid at 0.3BAR).

Also, use proper silicone hose NOT washer hose, it can melt when exposed to high engine bay temps.
Edited 04-10-2012, 11:45 AM by toxo.
toxo
24-08-2019, 02:10 AM #17

It's because it's an aftermarket supercharger. Factory installed superchargers are generally fitted BEHIND the throttlebody, so you would never get any excess pressure to vent. The blow off valve is not really nessecary (any excess presure generated is going to be pushing back against the supercharger screws and the belt motion, which is hardly going to bat an eyelid at 0.3BAR).

Also, use proper silicone hose NOT washer hose, it can melt when exposed to high engine bay temps.

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