Hi pple got a problem put a external wastgate on my fg g6et and a boost tap in jectors etc the problem is on the dyno the boost hits 17 psi the drops to 5 psi can any one help would b apreciated as its on the rollers now cheers

Does it use the standard actuator? As these are too weak, they cant stay shut when on boost... For 17psi you should have at least a 15psi actuator in there.

EDIT: Using external wastegate wont have an actuator duh...

Check the joiner that goes onto the throttle body, these are known for leaking...

Edited October 25, 201114 yr by Tobey

What is the external gates spring pressure? Do you need to adjust it first.

Ill see if it leaks thanx

Hi pple got a problem put a external wastgate on my fg g6et and a boost tap injectors etc the problem is, on the dyno the boost hits 17 psi then drops to 5 psi as the revs build up?!?!?!?! can any one help???? would b appreciated as its on the rollers now cheers :banghead:

Can't help other than to add your tuner should know what's going on and advising you

What turbo are you using?

1 thread is enough.

What other mods are done too the car besides the gate? What cat/dump is it running?

put a stage 2 cooler 1000cc injectors 60ml external waste gate serge tank with 2 044's and a 4inch dump into 3.5inch exhaust with hi flow cat.

stock turbo.

all I know bout the gate is got the two springs I think 15psi

got any pics of how the gates positioned? Whos tuning it and with what software?

using sct to tune