Previous owner has fitted a dump valve to my 95MY. I have no idea what make or model so bow to the huge knowledge of this board. It has 'numancs' written on the side and a small gold cone (about 15mm long) which I presume means it vents to atmosphere. It has a small screw head at the top, is this what you use to adjust it - and if so what will adjusting it do? Subaru dealer did not know - quote "they all go to prodrive for that sort of thing" !!!!
Any help much appreciated
Ken
Silver MY95 Scoobysport Exhaust, K&N filter 16in OEM wheels

[This message has been edited by Ken S (edited 02-05-2000).]

 

OK, I have turned the screw anticlockwise to the top and taken the car for a spin. I swear it feels twice as fast. Could I be wrong about the dump valve - could it be a bleed valve?
Cheers
Ken

 

Ken
Is the 'numancs' witting in green? and the gold cone has a sort of honeycomb texture?

If it is what I think it is be very careful as it's the bleed valve that superchips us for their chip conversion,I.E you will have no overboost limit
Jon

[This message has been edited by JON HUGHES (edited 02-05-2000).]

 

Jon
Yes it is. Do you have this kit? If so is it fully clockwise to reduce the boost and is there any way to find out if the Superchip is still fitted?
Cheers
Ken (slightly worried with screwdriver at the ready!)

 

Ken
No I don't have this kit but I did have it fitted to legacy turbo with no problems...

I would turn the screw back to it's original position though as it would of been set to the correct pressure.

It would also be a good idea to get a boost gauge fitted to keep an eye on things.

The only way to check if a superchips been fitted is to take the ECU out and inspect.

Jon

 

Thanks Jon, I will turn the screw back and invest in a boost gauge to see exactly what is going on.
Cheers
Ken