VHPD Bodies (again!)

The Oily Bits S1 Specific Topics
1

Hi folks,

Can anyone confirm that on the VHPD throttle bodies for the K series; the four take off nipples that are located on the head mounting flange is for the brake servo vacuum pipe?

Also, the two breather pipes that exit the camshaft cover, should these be blanked off or vented to a catch tank?

Thanks in advance

Ben.

2

Hi Ben,

The four take off nipples are not for the brake servo as the S1 Exige doesn’t have a servo on the brakes. I think that they are something to do with balancing the 4 inlet chambers and then they go onto the fuel return pop open valve.
And definalty do not block off the two breathers they need to be vented into a catch tank to collect the oil vapour that will come out of them as the engine vents.
Hope this helps.

Cheers Steve.

3

Thanks for the reply Steve,

I’ve been trying to find a photo as to where this vac pipe is routed to, it will probably make more sense when I get home and have a good look around. So far, I have seen that they use 4 T-pieces joined by some rubber hose attached to the vac nipples but then finding where this tails off to is a mystery. By pop off valve, do you mean the return pipe to the fuel pressure reg or fuel cannister?

Cheers

Ben.

4

Just tried to find it but failed, somebody posted the vacuum lines diagrams maybe they could help? I searched for vacuum…

5

Ben,

Yea, the fuel pressure reg in the return pipe. As far a I know the canister is just for filtering the vapour given off from the vent on the tank.

Steve.

6

The 4 bleed nipples can be balanced off by making a small ‘hoop’ out of 4 or 5mm silcone hose, with the hoop being between each pair of TB.

The vacuum take off is for the 2 spherical cannisters that supply vacuum for the heater air selector and other minor uses.

You can maintain these by again connecting the takeoff points from the TB’s via ‘T’ pieces to the cannisters.

Both the vent outlets from the top of the cam cover can be led to a oil catch tank (Mocul do one with two inlets and one outlet). I had mine on the left hand side ‘boot’ ally shield, then venting overbaord behind the LH rear wheel.

I will try to post a piccy later!

Pete. :slight_smile:

7

Thanks for your help so far, much appreciated.

Pictures would be good, i’ll try doing some more digging.

Cheers

Ben

8

[u]Clicky here[/u]

Something like this?? I can’t seem to attach the image…

I’m guessing that I could connect to the fuel reg and then to the map sensor. I’m planning on getting rid of everything else in that image so hoping this should be ok.

Does the emerald use the MAP sensor? Or am i getting confused with something else it doesnt use?

Cheers

Ben.

9

Here you go