R32 Acuator..

[Kane_R32]

haha, I'm only kidding matey, not meaning anything bad. For my first turbo swap, I dropped coolant all over the floor, because I didn't think i'd have to empty the radiator first

I don't take things to heart mate...

I checked the flappy thing tonight. Looks like it might not be fully opening like the standard one. Going to remove on the weekend and see if i can notice any markings on the inside. Have to get my hands on a grinder/drill to remove a little bit of metal I think.

BTW Car made 10psi with flapper freely open. And is extrememly lous with one screamer pipe!

[MANWHORE]

I've found that to be a problem with SOME split dump fronts. For most of them, they just have a flat flange with two holes cut into it - 1 for the wastegate, one for the exhaust gas. Doesn't leave a lot of room for the flap

[Cubes]

Hrmm I'd think 10psi is a tad too high. Mine with the 3ltr only managed 6psi; when the rb20 was in it it made almost nothing.

BUT that was running a bell mouth dump.

So you run a split dump with screamer. Screamer being not plumbed back in to the dump pipe but to atmosphere?

[Kane_R32]

Yeah screamer is just that. A split dump with atmos venting wastegate side..

Actually i think mine is the flat flange...lol might have found the answer!

Edited August 14, 2007 by Kane_R32

[Kane_R32]

Problem - Dump Pipe. Going to have to remove a little bit of the inner diameter of wastegate pipe to give the "flapper" alittle more clearence.

Might even go a bellmouth one as im only aiming for ~220rwkw at most.

[Kane_R32]

Have abit of an update:

Re-checked the clearances of where the arm connects to the wastegate "flapper", was deffinatley fouling there.

Removed enough of the dump but I'm still spiking to 13psi over 10psi, instead of 17+.

I've got a feeling that because the aftermarket one has a thinner diameter surface over standard. Thus allowing the "flapper" to foul the inside of the dump.

I'm going to use a second gasket (2mm thickness) to hopefully give enough clearance.

[WET-25T]

Hey im having the same problems you did except i have a JJR split dump/front pipe and the flapper touches the inside of the wastegate pipe quiet a bit. What did you end up doing to solve the problem?

Thanks

[Chris_RB]

I've also been having major overboosting problems on fairly stock set up. I just disconnected the actuator arm and took if for a quick drive - drive like a SLUG, but my car wasn't hesitating like it was, and also having max boost to about 0.4 bar compared to 1.2 bar! I have a new actuator I'm going to install and then I will return with the results. I'm hoping this fixes my hesitation and overboosting problems because I REALLY want to drive my damn car!

Also to note - do NOT grind off the c-clamp holding the actuator arm onto the wastegate. Carefully remove with pliers and save that because you'll need to refasten it... I think I read some post that was going to grind it off...that's bad...

[Cubes]

Splits generally slightly increase boost over a well designed bell as the majority reduce the flow capability of the wastegate UNLESS they are port matched to the back of the turbo.

Back to back a split vs a bell there's no power difference; run the split in to atmo and don't plumb it back in and depending on power made it does pick up power.

I'm running a bell and had it up to 285rwkw.