SovXietday
05-11-2008, 09:00 PM
Well, I finally was able to put my new wastegate in the Civic today to give it a try. It is a Synapse 40mm wastegate, the only diaphramless wastegate on the market today.
http://www.nipponpower.com/~nippon/prod_imgs/img-1058-1-large.jpg
They come in two sizes, 40mm and 50mm. The 40mm bolts up to the common Tial style 35/38mm flanges and the 50 will use the 44mm Vband.
There are some major differences between these gates and other gates. First of all, there is no diaphram or valve guide. My old Tial had a diaphram tear and the valve started to bind in the valve guide after a year and a half of use. Needless to say, this wastegate has no such issues.
Instead of using a spring set at a specific pressure to open the diaphram, this wastegate uses 4 ports with varying sizes. By mixing and matching the ports you can get anywhere from 5-20+ psi without using a boost controller. EBCs work just fine on them too, you just have to set them up a little bit differently. They also have a preload spring, to reduce the time between when the valve cracks and the turbo reaches full boost. The idea is the later the valve cracks, the faster the turbo spools, and you get a bigger area under the curve.
As for my experience...
So far, this wastegate has been scary accurate. My manifold causes creep to 14psi, but when the Tial was in the car I was getting anywhere from 14 on some pulls to 18 on other pulls. After switching over to this wastegate not only did the turbo spool a full 300rpms faster but every single pull I did was within .01 bar of each other.:eek:
All in all, I am super happy with how this thing has performed so far. Once this lovely scheduled rain passes us up I'm going to go swap the vacuum lines up to the highest psi setting (~19psi, actual psi depends on backpressure etc since there is no "boost spring") and see what happens. We'll call this an ongoing review for now. :)
http://www.nipponpower.com/~nippon/prod_imgs/img-1058-1-large.jpg
They come in two sizes, 40mm and 50mm. The 40mm bolts up to the common Tial style 35/38mm flanges and the 50 will use the 44mm Vband.
There are some major differences between these gates and other gates. First of all, there is no diaphram or valve guide. My old Tial had a diaphram tear and the valve started to bind in the valve guide after a year and a half of use. Needless to say, this wastegate has no such issues.
Instead of using a spring set at a specific pressure to open the diaphram, this wastegate uses 4 ports with varying sizes. By mixing and matching the ports you can get anywhere from 5-20+ psi without using a boost controller. EBCs work just fine on them too, you just have to set them up a little bit differently. They also have a preload spring, to reduce the time between when the valve cracks and the turbo reaches full boost. The idea is the later the valve cracks, the faster the turbo spools, and you get a bigger area under the curve.
As for my experience...
So far, this wastegate has been scary accurate. My manifold causes creep to 14psi, but when the Tial was in the car I was getting anywhere from 14 on some pulls to 18 on other pulls. After switching over to this wastegate not only did the turbo spool a full 300rpms faster but every single pull I did was within .01 bar of each other.:eek:
All in all, I am super happy with how this thing has performed so far. Once this lovely scheduled rain passes us up I'm going to go swap the vacuum lines up to the highest psi setting (~19psi, actual psi depends on backpressure etc since there is no "boost spring") and see what happens. We'll call this an ongoing review for now. :)