Combi_Chris

as above really, founf a plug missing so i plugged it back on, made no difference that i can tell of, also the lowest pipe on the amal is gone , is that ok ?

Combi_Chris

bttt

GrimmeRS2K

the wire is for the power to amal valve, if u notice no difference when unplugged your amal valve doesnt work, i ran mine with the pipe at the bottom disconnected, with the one in metering unit blocked up

Combi_Chris

the bottom pipe on mine seems to be gone also , what does the amal valve do exactly ?

db

The amal valve is a way to help boost rise quickly at the beginning of boost build up.

At lower boost levels the amal valve is powered by the ECU and the boost from the compressor diverted to the airbox, hence allowing the boost to build quickly. At a certain level the power is taken away and all boost will be going to the actuator.

Without amal valve boost would be going to the actuator from the start, the actuator spring will give way and start opening the waste gate a bit from the beginning of boost. In this manner it will take longer to build boost.

This of course applies to a standard set up. A -31 actuator with a much stronger spring than standard, will give way to the boost pressure later.

Cheers

Combi_Chris

so as far as ticking over goes this will have zero effect ? as i have an unstable tickover

ON-UJAH

A leak in the pipe from amal valve to the metering unit will give you runing problems - the RST is a closed system, any leak causes chaos.

JamesA_RST

so whats the idea of removing the pipe which goes from the Amal valve to the metering head?

GrimmeRS2K

if u block the metering unit pipe from the metering unit, it will run better IMO,mine did, instead of just dumping the air back into the metering unit, with the pipe removed from the amal valve it will go into the air, just like running a 3 way bleed valve,

mine boosted up a bit quicker, and felt more solid, as long as u block the metering unit one off!