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200VIA

Member Since 10 Jan 2015
Online Last Active Today, 09:53 AM
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Posts I've Made

In Topic: Installing an after market plumbed back bov on 180sx

18 February 2017 - 11:02 AM

I'm in a very similar situation, Greddy Profec with stock turbo & ECU.
I have mine in control mode, currently running 25% SET, 5psi START & 0% GAIN.
It spools up hard to 5psi even under fairly low throttle percentage, then holds there.
Then under full throttle it continues to spool up to about 10psi.
This should be safe enough until the car gets tuned.
PS- may I suggest late night 4th gear highway pulls... :rolleyes:

In Topic: Installing an after market plumbed back bov on 180sx

16 February 2017 - 11:03 AM

View Posts15rocket, on 15 February 2017 - 09:23 PM, said:

View Postpmod, on 15 February 2017 - 07:43 AM, said:

Did they swage the ends or weld on some blobs to give the hose clamps something to seat against? If you run a plain straight pipe without some sort of barb at the end, the risk of the pipe blowing off is greatly increased (been there, done that lol).

The car will run fine as it is on lower levels of boost, but it's something you really want to sort out for the sake of reliability.


Yeah its got the blobs on it. I had them replicate the same blobs on the stock one.

Installed it all last night and took it out for a drive tonight. Car is running like absolute chit! I don't think my BOV is working. I have one side of the dual port blocked off right now and the plumb part isn't hooked up yet, so I assumed it would work just like atmosphere BOV until I got the pipe work for it, but I can't hear anything. Not even fluttering or venting and I was getting the occasional small backfire.

I tried the set on 10% and the gain on 5% and the car hit 13 psi really easy and I felt the car get good power surge then then instantly it just falls flat like the boost completely falls off down to like 7psi. I don't know what's going on. Could be a boost leak? I might have to take it to someone who knows what they're doing. This is turning into a bit of headache tbh. Thank god I have another car to drive right now.

Regarding the BOV, if you have the atmospheric side blocked off, but the plumb back side left open to "vent", this may be causing over-fuelling issues for your AFM & ECU.
The BOV ports are sequential, meaning that in a dual port setup, the plumb back port opens slightly before the venting port to keep some air in the system.
This keeps the ECU happy, preventing issues such as stalling, backfiring, etc. as you described.
In any case, you're currently running 100% atmospheric, which the ECU probably won't like.

Regarding the boost controller (Greddy Profec, yes?), are you running in normal mode or control mode?
What you described could be a few different things...
1. You are hitting your set over-boost limit, causing the EBC to reduce boost.
2. If you're using control mode, if your "start boost" pressure is set too aggressively, your ECU could be detecting knock & going into safe mode.
I had this happen once when initially setting up my Profec.

In Topic: UPDATED S15 Stock Parts

15 February 2017 - 11:40 AM

Pillar pair SOLD.

In Topic: S15 Silvia/200SX JDM A-Pillar Gauge Mount

13 February 2017 - 09:56 AM

BUMP.

In Topic: UPDATED S15 Stock Parts

03 February 2017 - 01:08 PM

ECU SOLD.

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