FULL RACE TWIN SCROLL 30R results and data
maybe you should get it tuned for the 35r.
i hope you get the problems fixed soon. i can really hear the surging when you hit full boost.
but hows the spool on the 35r compared to the 30r? Is there a noticable power differance?
i hope you get the problems fixed soon. i can really hear the surging when you hit full boost.
but hows the spool on the 35r compared to the 30r? Is there a noticable power differance?
i know the car needs to be tuned. but even john said it him self. tuning wont fix this type of surging im having. so i need to fix the issue befor serious tuning take place.
i changed no settings from my 30r to my 35r
Yes, that's what I meant. I know you said nothing but the turbo changed, but I just wanted to make sure. Venting your valve cover on a maf based car can cause fuel trim issues, especially at idle, letting unmetered air into the intake manifold.
The new turbo may have slightly different airflow at idle, making the adjustment of your DV necessary to keep the DV essentially functioning the same as was with the 30r, meaning the same open/closed postion(wherever it was at idle before). Venting your valve cover isn't helping the situation though. With a vented valve cover and a maf based car, once you adjust your DV past the point where it will be either open or closed at idle, then you are changing the airflow characteristics enough so that the breather hose now becomes a big source of unmetered air, causing idling issues.
Eric
The new turbo may have slightly different airflow at idle, making the adjustment of your DV necessary to keep the DV essentially functioning the same as was with the 30r, meaning the same open/closed postion(wherever it was at idle before). Venting your valve cover isn't helping the situation though. With a vented valve cover and a maf based car, once you adjust your DV past the point where it will be either open or closed at idle, then you are changing the airflow characteristics enough so that the breather hose now becomes a big source of unmetered air, causing idling issues.
Eric
i follow you on that. thank you for that info. so now that the bov is all the way - '' loose'' is still ok because it does not open or leak when i do boost testing to around 27psi
I would say you are fine then. As long as it holds boost and idles fine with it loose, leave it as-is.
Now you just have to get your surging issue fixed. Does the 35r kit come with an anti-surge compressor cover?
Eric
Now you just have to get your surging issue fixed. Does the 35r kit come with an anti-surge compressor cover?
Eric
today i played with cam timing and still no luck. still surges. if at all a change the surge seems to have moved up in the rpm. but im not really sure but it is still there.
Well, I'm curious if it's real compressor surge or more issues with running a looser setting on your DV. I would have expected surge to be slightly lower in the RPM range and flutter there for a second or so, then continue on with boost. Although, I have no experience with this kit or 35Rs, so my guess may mean nothing.
I'm sure Geoff will chime in with what he thinks the issue is and suggest a solution.
Eric
I'm sure Geoff will chime in with what he thinks the issue is and suggest a solution.
Eric
Well, I'm curious if it's real compressor surge or more issues with running a looser setting on your DV. I would have expected surge to be slightly lower in the RPM range and flutter there for a second or so, then continue on with boost. Although, I have no experience with this kit or 35Rs, so my guess may mean nothing.
I'm sure Geoff will chime in with what he thinks the issue is and suggest a solution.
Eric
I'm sure Geoff will chime in with what he thinks the issue is and suggest a solution.
Eric
i turned the bov tighter in one part of that vid. so to loose id say id dout it.


