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:cooter:
ive decided i fancy fitting one to the volvo 460:p
to be honest im not very clued up on dump valves, im sure i heard there are different types for certain cars:scratch: are they?
im just after a cheap dv, possibly an ebay special. its not something i want to spend big bucks on, just something to pass the time youuuu knowww:D
anyone? :wasntme:
You can have a recirc one I have off a GTA . Just leave the recirc pipe off and there ya go :agree:
If the volvo runs a maf sensor you will need a recirc type dv
ive been running my 480 with an atmospeheric but when i put the bigger turbo on will be going back to a recirc
ahh, thats what i was trying to get at.! so does the b18ft have a maf sensor:confused: and if it does,what issues would arrise from running an atmospheric dv as reevio has done?
airflow meter cars require twin piston dump valves and it can be atmospheric, its only advised to have recirc due to returning the measured air, if you havnt got an airflow meter pretty sure anything will go :agree:
as i said ran mine not any issues as yet but will be going back until as sometime i can go standalone and rid that maf
yeah i run an atmospheric on my nova turbo and thats got a afm, never had any issues, although it is twin piston, never ran it with a single piston type but i've heard a few people say they have idle issues.Quote:
Originally Posted by reevio
mines an rspec one 1 piston works great and she idles fine i think the other issues people have come across are that the recirc put the preesure back in the system which some turbos need to function correctly
The problems arise because the air flow meter no longer see's the correct air flow at idle, if the dump valve is open. With a strong enough spring to ensure it stays shut at idle you won't have a problem.Quote:
Originally Posted by reevio
I as got the main dump valve on me 5 turbz it be proper blou at full rinse out 37psi innit. Me car proper flys and de dump valve gives it an extra 30 brake cos k-tec says innit:cooter:
is this something a twin piston type solves:confused:.Quote:
Originally Posted by Scoff
only if it's closed at idle :)Quote:
Originally Posted by raj
forgive me for lacking knowledge in the dv area.Quote:
Originally Posted by Scoff
arent dv's shut at idle anyway? or would you need a stronger spring to keep it shut at idle if it already isnt?:scratch:
No hence why with no boost they are open. When you are on the throttle you are building boost, when you let off the valve opens.Quote:
Originally Posted by raj
yeah mine closes shut on idle a treat sucks the piston up shut