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Greddy Type R FTW. Ive never had a problem with mine.
I did notice somthing though, I recently had a S14 T28 on mine just upgraded to a GT2871R.
Now with my BOV and running the T28 I had to have the the BOV tightened about half way to prevent the idle drop. Drove fine never had an issue with idle
When I installed the GT2871R Im able to loosen the BOV so it opens softer.
My Version
the 2871R (or bigger) can push enough air at idle to where it wont affect idle at transfer to Neutral, but the T25/28's cannot push enough air to keep idle stablized at Neutral Revs and Neutral transfer.
I have noticed a trend of ppl complaining about Ide drops and the majority of these ppl only run T-25/T28's
So i dont think its a matter of the ECU not being able to handle a Atmos. BOV its that the Stock turbos cannot push enough air to keep the systems AFR's stabliized when vented.
Kinda like when you pull off a vacuum line when the engine is running.
So i think its only a problem with stock turbos
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