Intercooler and dump valve fitted.

Dazz · #1 13-12-2007, 16:45

Hi guys, i did a search and found a few bits of advice but i just want to check a few things.
Ive just finished fitting my intercooler to the S12 with a T2, i used a Golf 20v turbo wing mount and mounted it by the rad with a good cold air feed, i used a cosworth 2inch - 2.5inch boost hose from the turbo to a 2.5inch tube around 6inches long then to a bit of silicone coupling to the bottem of the cooler, from the top outlet of the cooler i managed to use the standard hard pipe with a 2.5inch T-piece for a bailey dv26 dumpvalve then fitted to the throttle bodie, for the dv vac line i plumbed it in using the black vac pipe that runs across the top of the bulk head under the vin plate? i assume thats ok as i read most use the one from the fuel reg.
I also fitted a boost controller, mechanical one its a ball type or something, and i just set it half way, so im unsure of the psi, now the car drives great, i seam to have really strong top end power, strange as but if i drive hard the wheels spin all the way to the redline where as befour it wasnt as strong and the power dropped off a little earlier, the dump valve lets off buts not really that loud, so do you recommend i bin it? as i seam to have lost the chatter noise from the waste gate.

Thanks and sorry for the essay, just thought the more info the better.
Dazz

s13eater · #2 13-12-2007, 17:00

i really think dump valves are not needed unless you are running very high boost, they stop the turbo stalling and twisting the shaft, they also cause uneven idle and a moment of overfueling on a car with and air flow meter.

Oscar · #3 13-12-2007, 17:12

ive found in the past, that the nearer to the inlet the louder they are

post up a pic of the intercooler matey

Dazz · #4 13-12-2007, 17:42

I'll post a pic when theres some daylight, i think the DV is a twin piston?

maybe a bit stiff, worked fine on the evo but i was running 1.6bar, so im guessing the baby t2 doesnt push that much.
Thanks

umpkin · #5 13-12-2007, 20:29

mines a bailey twin piston dump valve, and tbh my T2 dont make it sound as loud as it prolly would with a T25

Dazz · #6 14-12-2007, 18:06

Hi again, no pics yet, but i tried a forge dump valve from a friends RST and its alot louder, so i assume that the spring is weaker on the piston, not really worried about the DV so i think i'll run without.

s13eater · #7 14-12-2007, 18:31

the cheap xs power dump valves are better than bailey and forge imho, it took 32psi on the t34 before the xs power dump valve started to leak, just needs a stronger spring and you can take the xs power ones apart easy enough, i used a bailey first ,but it leaked, they ex power do singlke and twin trumpet and my single is very load, i will use it, although the sxoc seem to be against them and say they are

,but i'd rather protect the turbo, there although there will be nothing

about 600bhp.

Oscar · #8 14-12-2007, 19:03

how much did u pay for the xs power one?

s13eater · #9 14-12-2007, 19:12

Quote:

Originally Posted by morkai

how much did u pay for the xs power one?

about £60, but i think they are even cheaper now.

Dazz · #10 15-12-2007, 18:46

There seams to be alot of hate for XS Power gear on th MLR but i think that most of the stuff is alright, will look out for a XS DV, thanks for the help.
And yes theres certainly nowt gay about 600bhp!