Stock turbo, E85 370hp/367tq
my experience with the syncronic is dismal. they use a funny flange to hold it to the pipe. the flange was held to the BOV with set screws (terrible idea). on one customers car the BOV literally popped off the flange at only 27psi. also, the same car had WOT fluttering which was because of the BOV as well. denver also tried it on his personal car and didn't care for it at all. he promtly removed it. the vacuum line settings can become problematic especially if your trying to fit the BOV in a tight place (stock location gets close to manifolds and rad fan).
the Forge RS is what i almost always recommend for big turbo cars, but for stock turbo cars it gives fluttering when gently lifting and part throttle conditions (especially when lifting to match speeds on the highway). the standard for DV works fine for stock turbo and has a few different springs and shims you can mess around with so it holds boost and doesn't flutter. we have a couple APS twin vent BOVs coming in to try on some cars but they are super backordered. mellon said he loves it on his car, as well as a few others that road race their cars.
the Forge RS is what i almost always recommend for big turbo cars, but for stock turbo cars it gives fluttering when gently lifting and part throttle conditions (especially when lifting to match speeds on the highway). the standard for DV works fine for stock turbo and has a few different springs and shims you can mess around with so it holds boost and doesn't flutter. we have a couple APS twin vent BOVs coming in to try on some cars but they are super backordered. mellon said he loves it on his car, as well as a few others that road race their cars.
The APS does work well too. Had a customer hold 32psi across no issues with it. Good drivability.
- Bryan

Last edited by GST Motorsports; Dec 15, 2009 at 11:43 AM.
Good numbers Goofy!! 
I'm the guy that KevinD swapped the stock 9 BOV with the Forge BOV. It made a hell of a difference. I had my doubts, but you learn something new everyday!

I'm the guy that KevinD swapped the stock 9 BOV with the Forge BOV. It made a hell of a difference. I had my doubts, but you learn something new everyday!
Last edited by BOOSTEZ; Dec 15, 2009 at 11:58 AM.
What's the story with the APS? It has a dual vent set up. Does that mean part gets VTA?
Maybe we need to start a BOV thread separate from this. I know there are a lot of them but they all seam to be inconclusive and/or contradictory.
Maybe we need to start a BOV thread separate from this. I know there are a lot of them but they all seam to be inconclusive and/or contradictory.
If you will run stock turbo then the BlaqOps single kit and a set of DW1000's is a no-brainer.
The catch with the double-pump is that you have to ship in your stock pump housing...not convenient if your Evo is your daily. That's why I'm looking into doing my own with a housing from Full Blown.
The catch with the double-pump is that you have to ship in your stock pump housing...not convenient if your Evo is your daily. That's why I'm looking into doing my own with a housing from Full Blown.
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4DRSALOON
EvoM New Member / FAQs / EvoM Rules
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Nov 9, 2009 04:21 PM



the question now is which fuel setup to run...

