Synapse Synchronic BOV installed
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From: California
I understand port C is gone, but is it now plumbed so that it gets it's source from the connection to the UICP?
So, my question is, is there still a chamber in the design that gets postive pressure to open the DV (what port C used to connect to), but now gets that pressure from the connection to the UICP?
Hopefully you understand my question, as it may be bit difficult to understand. Basically, is the function of port C and the corresponding chamber gone or is just port C gone and the pressure is now automatically taken from the UICP, so people don't have to tap into a boost source?
So, my question is, is there still a chamber in the design that gets postive pressure to open the DV (what port C used to connect to), but now gets that pressure from the connection to the UICP?
Hopefully you understand my question, as it may be bit difficult to understand. Basically, is the function of port C and the corresponding chamber gone or is just port C gone and the pressure is now automatically taken from the UICP, so people don't have to tap into a boost source?
Just was a warning *don't just plug the port c hole and think its ok* The blow off valve still needs to be modified internally to work properly for the port c delete. This can be done yourself and i will post a how to shortly BUT we are NOT responsible if you mess up your blow off valve in the process. If you want to send it in to have this done we do offer that
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I ran through all settings again today because I'm "working from home" (emphasis on quotes) 
Anyway I still like A+B the best in terms of throttle response and shift feel/crispness. With just B connected the BOV has to make several attempts to purge all the air in the intercooler piping when at WOT. With just A connected its better but seems like it wants to leak a lot of boost at part throttle. A+B seems best so maybe i'll stick with that and just play with the spring now. All settings give flutter in 5th/6th on the freeway above 10psi with the exception of just A which is only slightly better. Again this is just for my car..
Anyway I still like A+B the best in terms of throttle response and shift feel/crispness. With just B connected the BOV has to make several attempts to purge all the air in the intercooler piping when at WOT. With just A connected its better but seems like it wants to leak a lot of boost at part throttle. A+B seems best so maybe i'll stick with that and just play with the spring now. All settings give flutter in 5th/6th on the freeway above 10psi with the exception of just A which is only slightly better. Again this is just for my car..
Ah yes! Thats 100% correct its getting the pressure from the pressure from the UICP.
Just was a warning *don't just plug the port c hole and think its ok* The blow off valve still needs to be modified internally to work properly for the port c delete. This can be done yourself and i will post a how to shortly BUT we are NOT responsible if you mess up your blow off valve in the process. If you want to send it in to have this done we do offer that
Just was a warning *don't just plug the port c hole and think its ok* The blow off valve still needs to be modified internally to work properly for the port c delete. This can be done yourself and i will post a how to shortly BUT we are NOT responsible if you mess up your blow off valve in the process. If you want to send it in to have this done we do offer that
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I played with the preload the rest of the afternoon and it didn't make a big difference. The more preload I added the more it fluttered I tried this with A+B but not any other setting. At this point I think I ran through most of the settings 
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K I'll try B then - should I have the preload all the way loose (like the way it came). Or should I add preload (tighten it)? Mods are in my sig if you click the linky..
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Yes it will hold boost still hold boost perfectly fine.
I have ran my BOV like this before and had actually good results. But my car is kinda a testing facility so things are always changing
. I'd just like to see if anyone else got any benefit out of it
I have ran my BOV like this before and had actually good results. But my car is kinda a testing facility so things are always changing
. I'd just like to see if anyone else got any benefit out of it
I don't know if this video will be of any help to anyone in this thread, but here it is anyways.
http://www.youtube.com/watch?v=71L1w77xC-M
Basically, when it comes to surface area that boost & vacuum are acting on, it works like this:
Port A+B > Port B > Port A
It sounds counter-intuitive that only Port A would open up faster since vacuum would act on less area. But what you have to think about, is that when it is pressurized by boost, it is more area to hold the valve down, so it reacts a little slower, when you switch to vacuum.
Like Devin recommended, you can run try running without the pre-load spring. Mathematically, it isn't going to leak. I've run Synchronic BOVs before with only the pre-load and barely any tension, and they still work perfectly.
We're doing more tests this week with Devin's car, so we'll see what we come up with.
http://www.youtube.com/watch?v=71L1w77xC-M
Basically, when it comes to surface area that boost & vacuum are acting on, it works like this:
Port A+B > Port B > Port A
It sounds counter-intuitive that only Port A would open up faster since vacuum would act on less area. But what you have to think about, is that when it is pressurized by boost, it is more area to hold the valve down, so it reacts a little slower, when you switch to vacuum.
Like Devin recommended, you can run try running without the pre-load spring. Mathematically, it isn't going to leak. I've run Synchronic BOVs before with only the pre-load and barely any tension, and they still work perfectly.
We're doing more tests this week with Devin's car, so we'll see what we come up with.
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I've watched that video three times now and I still don't get it call me dumb I guess. Anyway I want to get back to playing with my Synchronic; I want to try port A or B while playing with the preload before I remove the preload spring.
I was preoccupied with crushing my IX bov (my ADD doesn't thank you Scheides hehe!). I crushed it just a tad with my vice and a 14mm socket. Anyway the result made it flutter a little more under low boost, light throttle shifting. It would spike to 28psi or so and follow my normal curve. I wasn't logging map again because I suck so I can't really draw any real conclusions other than now I know for sure the Synchronic does actually improve throttle response and boost response over the factory dv. I just have to get back at it and mess with the settings. Glad to have the Synchronic back on.
call me dumb I guess. Anyway I want to get back to playing with my Synchronic; I want to try port A or B while playing with the preload before I remove the preload spring. I was preoccupied with crushing my IX bov (my ADD doesn't thank you Scheides hehe!). I crushed it just a tad with my vice and a 14mm socket. Anyway the result made it flutter a little more under low boost, light throttle shifting. It would spike to 28psi or so and follow my normal curve. I wasn't logging map again because I suck so I can't really draw any real conclusions other than now I know for sure the Synchronic does actually improve throttle response and boost response over the factory dv. I just have to get back at it and mess with the settings. Glad to have the Synchronic back on.