Bad BOV symptoms??
07-12-2006, 03:24 PM
#1
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Bad BOV symptoms??
I'm thinking I may have a bad BOV...
The idle sux at cold start then it gets better after a while...
but anyways....
WHAT ARE THE SYMPTOMS FOR A BAD BOV????
The idle sux at cold start then it gets better after a while...
but anyways....
WHAT ARE THE SYMPTOMS FOR A BAD BOV????
07-12-2006, 03:43 PM
#3
Rennlist Member
This is a shameless copy from Paragon's website: http://www.paragon-products.com/product_p/ebdv18-b.htm
The OEM valve is what is commonly known as a diaphragm valve. This valve has been around since the mid 80's and has always been a very problematic part that typically wears out within the first 6 months of operation. An improperly working diverter valve will cause multiple problems. First of all, a improperly working or defective valve will cause boost loss. We have seen a 7-9 HP gain on the dyno on a small displacement motor just by replacing a worn out OEM valve with our Billet valve. Second, in between shifts when the valve is suppose to open to re-circulate the built up boost pressure, if it is defective and cannot open, the built up manifold pressure will "stall" the compressor of the turbocharger causing it to rapidly slow down which can cause turbocharger failure. This "stalling" of the turbocharger will also increase turbo lag in between shifts and reduce power. In addition, the EVO DV will flow 10% more CFM of airflow over the OEM valve.
The OEM valve is what is commonly known as a diaphragm valve. This valve has been around since the mid 80's and has always been a very problematic part that typically wears out within the first 6 months of operation. An improperly working diverter valve will cause multiple problems. First of all, a improperly working or defective valve will cause boost loss. We have seen a 7-9 HP gain on the dyno on a small displacement motor just by replacing a worn out OEM valve with our Billet valve. Second, in between shifts when the valve is suppose to open to re-circulate the built up boost pressure, if it is defective and cannot open, the built up manifold pressure will "stall" the compressor of the turbocharger causing it to rapidly slow down which can cause turbocharger failure. This "stalling" of the turbocharger will also increase turbo lag in between shifts and reduce power. In addition, the EVO DV will flow 10% more CFM of airflow over the OEM valve.
07-12-2006, 05:13 PM
#4
Captain Obvious
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Originally Posted by 87944turbo
This is a shameless copy from Paragon's website: http://www.paragon-products.com/product_p/ebdv18-b.htm
The OEM valve is what is commonly known as a diaphragm valve. This valve has been around since the mid 80's and has always been a very problematic part that typically wears out within the first 6 months of operation. An improperly working diverter valve will cause multiple problems. First of all, a improperly working or defective valve will cause boost loss. We have seen a 7-9 HP gain on the dyno on a small displacement motor just by replacing a worn out OEM valve with our Billet valve. Second, in between shifts when the valve is suppose to open to re-circulate the built up boost pressure, if it is defective and cannot open, the built up manifold pressure will "stall" the compressor of the turbocharger causing it to rapidly slow down which can cause turbocharger failure. This "stalling" of the turbocharger will also increase turbo lag in between shifts and reduce power. In addition, the EVO DV will flow 10% more CFM of airflow over the OEM valve.
The OEM valve is what is commonly known as a diaphragm valve. This valve has been around since the mid 80's and has always been a very problematic part that typically wears out within the first 6 months of operation. An improperly working diverter valve will cause multiple problems. First of all, a improperly working or defective valve will cause boost loss. We have seen a 7-9 HP gain on the dyno on a small displacement motor just by replacing a worn out OEM valve with our Billet valve. Second, in between shifts when the valve is suppose to open to re-circulate the built up boost pressure, if it is defective and cannot open, the built up manifold pressure will "stall" the compressor of the turbocharger causing it to rapidly slow down which can cause turbocharger failure. This "stalling" of the turbocharger will also increase turbo lag in between shifts and reduce power. In addition, the EVO DV will flow 10% more CFM of airflow over the OEM valve.
That's nothing more than a sales pitch.
You can replace the vavle with a new one for ~$30. Also I think the 911 valves are little more robust and they are also a direct fit.
07-12-2006, 06:28 PM
#5
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Nearly all Bosch BPV's are the same. There's 6001 differant part numbers but each of them cross references with the same $30 valve. I just got done researching this becuase my S4 needed new BPV's, which coincidentally also fit the 951.
I wish I had the part number off hand, but I don't. It Bosch part no. and it ends in 710N.
I wish I had the part number off hand, but I don't. It Bosch part no. and it ends in 710N.
07-12-2006, 06:52 PM
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https://rennlist.com/forums/showpost...79&postcount=1
Search...
Plenty of threads on the stock vs 993 bov etc..with part numbers.
Search...
Plenty of threads on the stock vs 993 bov etc..with part numbers.
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11-30-2006, 08:28 AM
#10
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Anyone use the EVO motersport diverter valve. Is it worth the extra $70 bucks and why?
http://www.paragon-products.com/product_p/ebdv18-s.htm
http://www.paragon-products.com/product_p/ebdv18-s.htm
11-30-2006, 08:55 AM
#11
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That is the one that is on my car, and of no other reason it was put together better than stock. Not sure if I have seen any improvement or not but it was an upgraded part to the OE part and I don't worry about the rubber seal ripping.
I have had it on for many track events and some street driving with no ill effect on boost (or over boosting).
I have had it on for many track events and some street driving with no ill effect on boost (or over boosting).
