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Rockbmx1

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Discussion starter · #1 ·
My new wastegate just arrived today, and I must say that this thing looks gnarly!! I have been around 44mm Tial WG's and they are very nice units, but I believe that this Synapse WG is upto par with Tial's quality. One thing that stands out to me is that this WG is noticibly larger then the 44mm. I am installing it on my newly built 6 bolt motor and I will tell you how this WG works and my thoughts are when I am putting it to use. I give it two big thumbs up as of now, and I'm sure that I won't be dissapointed.
 
Discussion starter · #3 ·
It is for a t3 60-1/P-trim turbine wheel. It has a .70 to4s comp cover, and a .82ar turbine housing. I have the works done to the motor and everything else, so I figured that I would get the bigger WG that synapse makes. The manifold that I am using is setup to use a Tial V-band style WG too.
 
Discussion starter · #4 ·
Oh, and I forgot to mention, the Synapse WG comes with two valve seats so that you can adjust the WG flow! That is very cool. Synapse says that you should buy the biggest WG that you can fit under your hood (refering to the synapse WG only) cause the synapse WG's are so adjustable.
 
If their wastegate works half as well as their BOV you're going to love that part.
 
Discussion starter · #7 ·
I have heard that these WG's are better then Tial's. They don't use a diaphram, boost control built in, and you can adjust when the gate cracks. Another nice thing about Synapse's WG's is that they are thinner then the Tial WG's so it is easier to fit them in to tighter spots.
 
If you're planning on running that turbo out you should have bought a smaller wastegate and saved some cash. My 44mm is too big for my full T4 70mm, I ran run clear down to 8psi without creep.
 
Discussion starter · #10 ·
Im not too worried about running a big WG. Why would running a big WG be bad? Synapse provides a valve seat to make it a 40mm WG also. I was planning to run that seat because they said that with this WG you are able to decrease spool time by using the small seat, and adjusting the WG spring.
 
Only if you were running on the outer limits of the gate. Like I said I can get down to 8psi on a 44mm with my full frame t4 70m.
 
Will it be a bad thing running a wastegate this big, or is it just more gate then I will need for my setup?
Too large of a wastegate or too soft of a spring has the potential to slow your spool. Cracking pressure is generally half of the sping's rated value. Example: you install a 1kg spring with boost controller set to 2kg. At as little as .5kg, the wg valve will start to lift off the seat, wasting exhaust energy that could've otherwise been used to speed up the spool of your turbo. The wastegate does not stay completely shut then suddenly pop open when max boost is reached.

Think of your cylinder head in simple terms: smaller or larger valves at the same lift, which flows more? Which will waste more exhaust energy applying this analogy to the wastegate?

This gate isn't a bad choice or "too big", I'd say it's just not ideal for your application.
 
Discussion starter · #20 ·
Too large of a wastegate or too soft of a spring has the potential to slow your spool. Cracking pressure is generally half of the sping's rated value. Example: you install a 1kg spring with boost controller set to 2kg. At as little as .5kg, the wg valve will start to lift off the seat, wasting exhaust energy that could've otherwise been used to speed up the spool of your turbo. The wastegate does not stay completely shut then suddenly pop open when max boost is reached.

Think of your cylinder head in simple terms: smaller or larger valves at the same lift, which flows more? Which will waste more exhaust energy applying this analogy to the wastegate?

This gate isn't a bad choice or "too big", I'd say it's just not ideal for your application.
I agree with you completly with what you said, but this is where the beauty of the Synapse WG's....You are able to control when the WG will crack open. you can advance and delay when the gate will crack, and when it will fully open. I am using a 60 Lbs/sq in spring, and having the delay all of the way up. I am going to to actually be able to decrease the time it takes to fully spool my turbo. Once again, Synapse FTMFW!!!!!!
 
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