With the Synapse, there are no spring changes, no adjustments, nothing. You just put it in and go. We put 40psi to mine and it is dead silent - no leaks.

 

The synapse is great, but if you live in a emission **** state like california seeing the synapse is a trip to the smog ref and heavy fee's the samco bov in black or forge in black. Are good if your going for stealth since the synapse is somewhat chunky.

 

yes, im still using the stock uicp and bpv

luckily we dont have to worry about that here haha

i will look into the synapse when i switch to e85 and start running more boost

 

I am thinking of going with Forge simply cause it is black and stealth, but all these "Gurus" talking about the Synapse is making me wonder. Although my engine bay is pretty stock looking.

 

Read up on the Forge. It holds boost fine, but it often causes bad flutter.

 

the Synapse honestly confuses me

 

I did some more research on it, seems like it has flutter/jumpy issues just like any of the BOVs. half of the people responded with 100% no problems, and the other half said they get some surge, a lot of flutter on the highway, and a lot of bucking in part-throttle situations.

So what makes the Synapse better?

 

Oops I mis spoke. I am running the Samco. Only about 25 psi, but the drivability is a bit better and I hate the sound of BOV's (its as quiet as stock and fits like stock). It is known to hold higher psi well. Running medium spring. If you have an aftermarket ignition there is no cruise flutter as well!

As far as thje Forge, I suspect that it only gets terrible reviews because the normal owner is too lazy to scroll through the million possible settings to get it tuned properly. It would only flutter a tad during cruise on the girlfriends car.

 

It doesn't flutter, creates no idle issues, needs no adjustment, and won't leak. There are three possible vacuum port arrangements. Find the one that works best for you (do a search) and you're done.

 

In the two major Synapse threads I found, there were quite a few people experiencing both flutter and bucking.

 

Forge RS. I have tried MANY and the adjustability makes a huge difference(holds boost great)

I haven't tried the synapse, however, it does sound good.

 

Please read, I created this topic a few years ago specifically with the info you are looking for:

https://www.evolutionm.net/forums/ev...-26-27psi.html

Carlos

 

There are three possible ways to connect the vacuum ports. Find the best way for you, and it should be perfect. Those with smaller turbos tend to use a different setting than those with larger turbos, etc. I found perfection with A+B to the manifold and C to the UICP.

I had the Forge RS and ditched in favor of the Synpase.

FWIW, I realized two issues with the Forge design. The first that the tightest setting is required for over 30psi boost, and Forge states that ~34psi is the maximum it can hold regardless. The second is I found that setting gave the poorest overall drivability. The Synapse won't leak at 40+ psi and gives absolutely transparent drivability.

 

I went ahead and ordered the Synapse in favor of you Gurus

We will see how it works for me.

 

I'm recirculating the Synapse BOV with 39 psi on the Red.

Rock solid!

C port to the turbo outlet pipe + A port to the intake mani + B port blocked.