Allright, I thoroughly enjoy driving my 99 NB, but I've always wondered if the intake side at the turbo could be done better.
Here's a picture of the setup: (note: slightly old pic when we were building the car, but the intake side is the same.)
As you can see the intake side is long, heavy (steel/iron?) and it has two 90 degree bends...
Now I don't want to switch to a new ECU just yet, I'm now using the Link Piggyback at 9psi. (this gives me around 235 engine HP with 93 octane)
Because of a slight problem/discomfort I had with the car 'juddering' when releasing the throttle rapidly at high rpm's (in boost) I started a thread some time ago:
1.8NB - old FMII - 'judder/shudder' when releasing the gaspedal
Now one of the possible solutions involved getting a new BPV. (i'm now using this: http://www.bellengineering.net/produ...roducts_id=126
And why not change the intake side together with the BPV?
So basically this thread is about some questions I had:
- the BPV I was looking at was the TurboXS RBV-H34. This has the same 34mm inlets as my current BOV. (I think) So installation should be easy. I was looking at this one because I heard good things about the brand. It's also inexpensive at $130 and HOPEFULLY it's a bit louder than my current BPV, that would be awesome.
Can you guys comment on this?
- For the intake side I'm still using the stock MAF sensor and housing, I'm looking at changing the whole bends and stuff. My miata is currently at the garage so I'm being a real noob here: What is the size of tubes I'm looking at to make it work? 2.5" 3"? (GT2554r turbo) Anyway, I was thinking along the lines of a 45 degree silicon bend, an aluminium T-piece for the BPV and then another silicon piece that goes on the MAF. (the maf has to be relocated for this of course) Any comments or info about sizes?
Oh and do you think this makes sense? Or isn't it going to make a difference in one of the three categories? (Less 'judder', more noise
, power/spool) The BPV isn't that much work, but changing the intake layout is, kinda... If it doesn't really giving me anything in return, I'll leave it like this because the setup is pretty solid right now.
And, I'm being a noob again, do I need a new tune when I change the BPV and/or the intake piping length? (I guess so?)
Sorry guys, I tried to search but not being native American I'm always having a difficult time inserting a correct sentence/words into the search box,