DSMunknown
15+ Year Contributor
- 4,108
- 42
- Sep 16, 2004
-
Worcester,
Massachusetts
So after all my problems with my original Forge 1G CBV, I contacted Patrick and he hooked me up with a prototype Mazdaspeed compressor bypass valve with a 1G flange.
I just concluded that my car simply didn't like the push-type CBV that I had. No idea why that is. My uncrushed 1G BOV did fine, so it somewhat baffles me as to why the engine would act so awkwardly with the Forge bolted on.
Anyways, after over 2 years with having it lying around, I still wanted to get my dollars worth from what I put into the Forge company. Patrick didn't give me too many details about the CBV before he shipped it out to me, but he was fairly confident it would cure my boosting woes.
And it sure did.
This thing holds boost like no one's business. I only currently have the green spring installed (the weakest of the four) without any shims in place, and it holds in the low 20PSI range all day long.
As far as sound goes, it is akin to the regular 1G CBV I purchased originally. No surprise there. Yes, it does look very similar to the HKS SSQV that has been around forever, but there is no fluttering with this piece.
Just me thinking out loud here, it somewhat reminds me of the upside down 2G BOV mod that some have tried. (Examples here and here for reference.) But I'm getting off topic.
To switch springs or add/remove shims, all I need to do is unscrew the top of the piston chamber and voilà. No more messing around with the allen wrench and small bolts, in fear of losing or stripping them. Very nice.
The only "bad" thing I would say about this product is that it does not swivel like the 1G version does (owners know what I'm talking about). I liked how I could turn and angle the full camber (and outlet) of the Forge 1G if I needed to. On the other hand, the revised lock ring was also needed for the 1G to work properly, but not in my case.
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I just concluded that my car simply didn't like the push-type CBV that I had. No idea why that is. My uncrushed 1G BOV did fine, so it somewhat baffles me as to why the engine would act so awkwardly with the Forge bolted on.
Anyways, after over 2 years with having it lying around, I still wanted to get my dollars worth from what I put into the Forge company. Patrick didn't give me too many details about the CBV before he shipped it out to me, but he was fairly confident it would cure my boosting woes.
And it sure did.
This thing holds boost like no one's business. I only currently have the green spring installed (the weakest of the four) without any shims in place, and it holds in the low 20PSI range all day long.
As far as sound goes, it is akin to the regular 1G CBV I purchased originally. No surprise there. Yes, it does look very similar to the HKS SSQV that has been around forever, but there is no fluttering with this piece.
Just me thinking out loud here, it somewhat reminds me of the upside down 2G BOV mod that some have tried. (Examples here and here for reference.) But I'm getting off topic.
To switch springs or add/remove shims, all I need to do is unscrew the top of the piston chamber and voilà. No more messing around with the allen wrench and small bolts, in fear of losing or stripping them. Very nice.
The only "bad" thing I would say about this product is that it does not swivel like the 1G version does (owners know what I'm talking about). I liked how I could turn and angle the full camber (and outlet) of the Forge 1G if I needed to. On the other hand, the revised lock ring was also needed for the 1G to work properly, but not in my case.
