Bov

Isphius · 08-30-2006, 04:13 AM

No, the ssqv doesnt recirculate. There is a forge recirculated one, and some that are 50/50. Most stlyes of valves have a spring holding them closed, And the pressure pushing against the valve. Ie, Pusher(pressure wants to push it open). The ssqv has the pressure from the turbo holding the valve closed, So the more pressure the harder it is to leak. And what opens it is the vaccum on the other side of the throttle body after you close the throttle. Thats what opens all BOVs. It realses the pressure for 2 reasons. When you close the throttle, There is still a large column of air moving under pressure from the turbo through the whole IC and piping to the throttle. If the pressure backs up, It can slow the turbo down. Thats always bad. 2nd, It makes a backwave of air pressure, Which can damage the turbo.

Reeves · 08-30-2006, 07:47 AM

Quote:

Originally Posted by Isphius

No, the ssqv doesnt recirculate.

I was under the impression that you could set up the ssqv to recirculate.

Whats so bad about having a BOV that just dumps pressure into the atmosphere anyways??

Burn N' Up · 08-30-2006, 06:29 PM

Whether its good or bad is your choice but what happens is all the air the MAF just read gets blown into the atmosphere with every shift but the fuel that was meant for that air still gets injected into the engine so it can cause a little flooding and sometimes stall. Initially i never stalled when i had it, but now with all the work I did to the car I stall once in great while when the car is cold and I shift and when warmed up have a little flame out the pipe from first to second if I'm getting on it. So not a big deal unless you've been taking poor care of the car and back fire really hard. There is an attachment for the HKS SSQV that someone was selling that lets you recirculate if you want.

08-30-2006, 04:13 AM	#1
Isphius 500whp yet? Join Date: Nov 2005 Location: Long branch, NJ Posts: 1,006	No, the ssqv doesnt recirculate. There is a forge recirculated one, and some that are 50/50. Most stlyes of valves have a spring holding them closed, And the pressure pushing against the valve. Ie, Pusher(pressure wants to push it open). The ssqv has the pressure from the turbo holding the valve closed, So the more pressure the harder it is to leak. And what opens it is the vaccum on the other side of the throttle body after you close the throttle. Thats what opens all BOVs. It realses the pressure for 2 reasons. When you close the throttle, There is still a large column of air moving under pressure from the turbo through the whole IC and piping to the throttle. If the pressure backs up, It can slow the turbo down. Thats always bad. 2nd, It makes a backwave of air pressure, Which can damage the turbo. __________________ Yay the supra assistant is gone!!! WEEE!! Last edited by Isphius; 08-30-2006 at 04:16 AM.

08-30-2006, 06:29 PM	#3
Burn N' Up 3" Exhaust Join Date: Sep 2005 Posts: 238	Whether its good or bad is your choice but what happens is all the air the MAF just read gets blown into the atmosphere with every shift but the fuel that was meant for that air still gets injected into the engine so it can cause a little flooding and sometimes stall. Initially i never stalled when i had it, but now with all the work I did to the car I stall once in great while when the car is cold and I shift and when warmed up have a little flame out the pipe from first to second if I'm getting on it. So not a big deal unless you've been taking poor care of the car and back fire really hard. There is an attachment for the HKS SSQV that someone was selling that lets you recirculate if you want. __________________ 89Turbo 5 speed:Eibach lowered,Tokico Illumina II TEMS,All Poly Bushings,3" Elbow/DP/Cat,HKS Sport Turbo Exhaust,K&N FPIK w/ AEM Dryflow,Cooleeze ceramic coated Turbo inlet Pipe and 2.5" hard IC Pipes,Custom 2.5" fitting Spearco IC,HKS SSQV BOV,Greddy 1.5mm MHG and timing belt,Magnecore Comp Wires,NGK IR Low-temp Plugs,ARP studs,Dual Flex-a-lite fans w/ thermo switch,Fluidyne Rad,PCV VTA,Stage 3 F1 Racing clutch,Stainless braided clutch line and brake lines,Drilled & slotted rotors,EBC pads.