lol, funny name. Anyways, I am planning on porting my CT wastegate asap, will i need a bigger flapper to finish this job? Its just a last minute thing that crossed my mind. :icon_conf
Bigger Flapper?
- Thread starter xXxICExXx
- Start date
The wastegate has about a 2mm lip all around that it seats against, so you shouldn't have any problems as long as you make sure you still have about 1mm for it to seal against.
Just out of curiosity, why are you porting it? It only needs to be bigger if you are experiencing boost creep, which is not too common with the CT.
-Jake
Just out of curiosity, why are you porting it? It only needs to be bigger if you are experiencing boost creep, which is not too common with the CT.
-Jake
I have a bic DDP and even before i put my boost controller in last week, no shims, it was capeable of hitting fuel cut quite easily, the creep is nasty.
say i put my spec II to 10% etc, the target is about 8 psi. It hits that fast, then goes up 1 psi every second. Doesnt matter if the controller is on or off, it hits its target psi then creeps slowly but smoothly towards fuel cut. The gain is set to 0%, it should be dropping not rising.
Right, the problem is creep.
I would bypass the ebc for now and do what I suggested in your other thread, then you can put the ebc back in the picture. For now, I'd put the stock wastegate actuator pressure hose back on, straight from the turbo to the actuator, and tune out fco.
With our ddp, we ran around 10-11 psi with no ebc.
Porting the gate will also help, but what good is an ebc if you can only run 9 psi?
I would bypass the ebc for now and do what I suggested in your other thread, then you can put the ebc back in the picture. For now, I'd put the stock wastegate actuator pressure hose back on, straight from the turbo to the actuator, and tune out fco.
With our ddp, we ran around 10-11 psi with no ebc.
Porting the gate will also help, but what good is an ebc if you can only run 9 psi?
IHI-RHC7 said:
that is EXACTLY what ive been wondering all night long, it doesnt make any sense to me. All i know is it increased the throttle response and torque badass. haha love it.
BTW i want someone to explain this to me, and im not even kidding....Lastnight, I hit 16-17 psi, trust me i was watching my guage, and i didnt hit fuel cut? I know everyone is gonna call bs on that but im dead serious. I mean my car virtually shut off for a second, but no wild bucking and kicking that fuel cut is supposed to do, just a poof of the turbo and kept going.
The only thing that makes any sense to me is that it increases the efficiency of the turbine so much, that the stock gate is effectively too small to manage it. I know the GroupA cars had a 30% larger flapper, and a divorced downpipe. Porting should help, but shifting FCO up a pound or two won't hurt anything and is very easy and free.
The DDP causes creep because it vastly improves exhaust flow. The dynoed HP difference between the DDP and regular downpipes has been mentioned many times. The CT-26, being a small turbo, doesn't need much to spin it so a lot of the exhaust gases have to be bypassed through the wastegate; as boost builds, the amount of exhaust builds as well, and the wastegate becomes the main restriction.
My solution was to install a fuel pump and AFPR and "tune" out fuel cut with the SAFC, by reducing the airflow signal to the ECU. You would need a tuning device (SAFC or equivalent) and wideband O2 (to make sure you have the proper A/F ratios) to do this safely.
If it truly was 16-17psi without any tampering with the AFM, you may have a pre-turbo leak where you're letting in unmetered air. This will also cause you to run lean, so it's something you will want to check.
My recommendation is that you invest in a wideband O2 sensor. This will help you to figure out what's going on with the car, and will allow you to safely fix the issues.
My solution was to install a fuel pump and AFPR and "tune" out fuel cut with the SAFC, by reducing the airflow signal to the ECU. You would need a tuning device (SAFC or equivalent) and wideband O2 (to make sure you have the proper A/F ratios) to do this safely.
BS.xXxICExXx said:
If it truly was 16-17psi without any tampering with the AFM, you may have a pre-turbo leak where you're letting in unmetered air. This will also cause you to run lean, so it's something you will want to check.
My recommendation is that you invest in a wideband O2 sensor. This will help you to figure out what's going on with the car, and will allow you to safely fix the issues.