LittlesumoS15

Yeh but I have a high flow metal cat which looks like it flows really well, perhaps too well. I'm going to try stick the restrictor in the muffler and see if that controls the boost.

Does anyone have an opinion on whether a divorce dump pipe which splits the flow of turbine and wastegate gases like the CES ones would help reduce boost creep?

Buhahahahahahaha

lol I think you might be right...

Oh I see, that makes sense. So the best/easiest solution is a more conservative tune? Thanks for your reply.

Hmm I think I understand what you are saying but I'm a bit of a technical noob I'm afraid. Could you explain it for an idiot? I'm using a stock manifold which probably doesn't scavange very well. I'm also using Greddy Easy Cams - IN 256 EX 264 10.5mm lift. Would that be a factor? If this is the case, what would the solution be? In regard to movement of the actuator bracket etc, I've had a quick look and I doubt that would be the problem...

Thanks for your reply Paul33 - big fan of your PowerFC FAQ btw . Yeah I've heard it's pretty uncommon for the actuator to fail. Only thing I can think of is the diaphragm may have a problem. I bought the HKS GTRS brand new, genuine, standard trim, with the actuator already attached. I fitted the turbo myself and no one else has touched it. But I didn't check the actuator bolts tho. I assumed they were already tight. I've got a cheapo one piece dump pipe + front pipe. It has a bell mouth opening and I can move the wategate flap manually without any interference. The flap can open right up so I don't think it is hitting the dump pipe or catching on it. I will check it for play or movement on the actuator bracket tho. Thanks for that. Anymore ideas?

Hi, I'm using a HKS GTRS with HKS 1 bar adjustable actuator which I've noticed a few SAU members use so I'm hoping you guys will be able to help me with an overboost problem I’m having with my S15. Had the car tuned previously and it sat on 15.5psi flat without any problems. Had it retuned recently and it started overboosting to 18psi at high revs over 6500rpm in 3rd and 4th . Things I’ve done to find the problem: 1) Unplugged the electronic boost controller and ran the actuator off the intercooler piping as the pressure source. It should only boost to what the spring in the actuator can hold but it still ran up to 18psi. So overboosting wasn’t solenoid/EBC related. 2) Took the adjustable actuator arm off the wastegate and tested the flap wasn’t hitting on the dump pipe or jamming. It opened all the way easily. The rod was also movable and not jamming. 3) Adjusted the HKS 1 bar actuator by lengthening the rod to see if that would reduce the boost. I was expecting atleast a 1psi reduction after 3 full rotations but nothing, still overboosting. So I’m leaning towards the problem being the actuator even though I bought it brand new. Must be only 6-8mths or so old. Do these actuators often fail? Anyone had a similar problem? What should I try next? Replace the actuator? Any help would be much appreciated. Cheers,

^^ As above. And read that man's FAQ/Bible on the PowerFC in his sig. Best PFC guide ever on the interwebs.

For a street car - the PFC is the best bang-or-buck. You simply plug it in and way you go for a tune. They are so common now that most tuners have a wealth of experience in them as well so you are pretty safe. Cheaper and effective.

I'm using a HKS EVC 6 running 17 psi with no problems. Holds nice consistent boost and is pretty straight forward to use. I've also seen good results with the Turbosmart Eboost.

Spotted a gunmetal grey R32 GTR with a loud a$$ in Civic.

The vinyl is a good/cheaper alternative to interior parts moulded out of fibre glass with a carbon fibre film covering it. Judging by Charle's work it looks very professional and just as appealing imho. Best of luck with it buddy.

WD40 is not oil based. It's a silicone spray that displaces water and moisture (what it was designed for). It can be used to clean inside the rubber boot and is safe to use on electrics. It beats a wet rag hands down.

WD-40 and a lint free cloth with do the trick. Let it dry and wacky them back in.

Funny how they target all the gingers and emos out there.... GINGERS HAVE SOULS TOO! Ask is guy ----->