I am about to supercharge my car again.
This time I am using a centrifugal supercharger blowing through the throttle body. I will use a recirc blow off valve I think.
I have been reading a bit about them but all the info I have found is re turbo applications.
As I understand it the BOV should be set up so seals at idle and over run, but blows off (ooh er Mrs) with vacuum and boost?
Is this ok so far?
My research then seems to show that if I am using MAP (which I will be) and or a recirc valve it can happily blow off at idle.
Any experience any one can share or advice?
The supercharger system on my VW Golf R32 is a VF centrifugal charger and uses a recirculation valve, it also uses a MAF. The valve recirculates when
the throttle is closed and the system is pressurised. At idle it wouldn't operate as there is no pressure in the system. It feeds back into the
intake above the MAF as the air has already been metered.
Well that's how I think it operates.
quote:
Originally posted by dubzter
The supercharger system on my VW Golf R32 is a VF centrifugal charger and uses a recirculation valve, it also uses a MAF. The valve recirculates when the throttle is closed and the system is pressurised. At idle it wouldn't operate as there is no pressure in the system. It feeds back into the intake above the MAF as the air has already been metered.
Well that's how I think it operates.
Shamelessly stolen from
http://locostbuilders.co.uk/viewthread.php?tid=195525&page=4
quote:
Originally posted by bi22le
quote:
Originally posted by dubzter
The supercharger system on my VW Golf R32 is a VF centrifugal charger and uses a recirculation valve, it also uses a MAF. The valve recirculates when the throttle is closed and the system is pressurised. At idle it wouldn't operate as there is no pressure in the system. It feeds back into the intake above the MAF as the air has already been metered.
Well that's how I think it operates.
A supercharged R32, I bet that is nippy?!?
With MAP based fueling it should make no difference whether you use bov or recirc.
I've used both a recirc valve (VAG 710N from the plenum to the inlet) and a valve which dumps to atmosphere. The recirc valve works but tends to raise the inlet temperature.
quote:
Originally posted by jeffw
I've used both a recirc valve (VAG 710N from the plenum to the inlet) and a valve which dumps to atmosphere. The recirc valve works but tends to raise the inlet temperature. [/quote
Hi Jeff
My set up will be similar to yours.
Does your valve dump at idle?
]
jeffw - 1/4/15 at 11:16 AMYes, you can here the blow off at idle
rdodger - 1/4/15 at 04:57 PMquote:
Originally posted by jeffw
Yes, you can here the blow off at idle
Great thanks!
jeffw - 1/4/15 at 05:13 PMhear, not here of course. Dangers of replying on a phone !