blow off valve ?

fk8_#798 · Nov 1, 2017

kshawn said:
I don't believe they actually have a research team. I've had there BOV, which broke, and the CVT mount, which vibrates like all hell.

Totally agree with the BOV and how they tried to release it days after the type r release with no R&D

The motor mount vibration your experiencing is engine vibration transfer. Especially if you did the upper right side pitch mount. I have hasport 72a and vibrates like hell. My 2015 si is fully build ,. engine and tranny both forged ,. so I need it . But if it weren’t for the built engine I would have went back to an oem upper pitch mount which to be honest I feel like doing lol.

kshawn · Nov 1, 2017

I'll probably stay with the OEM or hasport 68 mount. It's still a daily xD so I want it to be semi comfortable

fk8_#798 · Nov 1, 2017

Definitely agree with staying oem

shihabp79 · Nov 1, 2017

I'm confused, is this some of y'all's first turbocharged vehicles? If a diverter valve is designed to recirculate, then it's putting metered air back into the intake so that the air/fuel mixture remains accurate and constant. You start venting to the atmosphere with those obnoxious HKS or similar BOVs, then you're starving your combustion chamber of the air that was supposed to be recirculated back into the intake. So between shifts your A/F ratio suddenly surges rich and that's a lot of unburned fuel running through your engine.

fmoua916 · Nov 1, 2017

shihabp79 said:
I'm confused, is this some of y'all's first turbocharged vehicles? If a diverter valve is designed to recirculate, then it's putting metered air back into the intake so that the air/fuel mixture remains accurate and constant. You start venting to the atmosphere with those obnoxious HKS or similar BOVs, then you're starving your combustion chamber of the air that was supposed to be recirculated back into the intake. So between shifts your A/F ratio suddenly surges rich and that's a lot of unburned fuel running through your engine.

I used to own a 335i stock is diverter valves and many ran bov that vent to the atmosphere and had zero issues even at shifts

shihabp79 · Nov 1, 2017

fmoua916 said:
I used to own a 335i stock is diverter valves and many ran bov that vent to the atmosphere and had zero issues even at shifts

Depends entirely on where in the intake path the air is metered, placement of the BOV and whether it's a MAS or MAF system. Some do okay with venting to the atmosphere like the Toyota Supra TT's 2JZ-GTE and others bog and run like crap like the Skyline GT-R's RB26DETT. For most engines, you want to keep it recirculated.

boosted180sx · Nov 1, 2017

fmoua916 said:
I used to own a 335i stock is diverter valves and many ran bov that vent to the atmosphere and had zero issues even at shifts

I'm not sure how the 335i's are but it's only an issue on cars with MAF sensors and if the MAF is placed before the valve. If it's in a blow thru MAF set up or running a MAP, it shouldn't be a problem.

maddmatt02 · Nov 21, 2017

fmoua916 said:
I used to own a 335i stock is diverter valves and many ran bov that vent to the atmosphere and had zero issues even at shifts

If I remember right it was 2 diverters, each one feeding the inlet between a turbo and the air box. At first I did the cheap mood where you unplug the recirc hoses, cap the ports on the inlets and just "vta" the diverters. I thought it actually sounded really good. Went with a new CAP/tial later on though. The N54 as far as I remember used map sensors, I think the N55 was when they threw a MAF into the mix.

blow off valve ?

fk8_#798

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kshawn

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fk8_#798

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shihabp79

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fmoua916

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shihabp79

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boosted180sx

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maddmatt02

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