Stock rb25det neo questions

[Wazmond]

Hows your intake piping? Are you still running stock?

Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?

[GTSBoy]

7 hours ago, Wazmond said:

Hows your intake piping? Are you still running stock?
 

Not stock. All remade. Mostly looks stock because the pipes run to and from the standard holes in the inner guard to get to the return flow FMIC.

7 hours ago, Wazmond said:

Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?

I'm not sure which question you're trying to ask, because it seems like "stock position" vs "stock position".

[Wazmond]

Apologies, while id like to put the MAF as close to the TB and relocate the recirc, this may be too much work.
Will most likely end up just putting it on the original AFM spot ( onto/next to the airbox ). 
Was going through nistune, found a pretty nifty doc on this. Nistune MAF Notes.

Also, i was looking through the bay, and there seems to be a tube/line connected from the A/C to the intercooler piping ( Between the smic and the recirc), what does this do as the crossover fmic piping doesnt have any connection? plumbing? not sure what you call it but the nipple thing ahah. 

Also, been reading up more about crossover fmic in regards to the legality of having the hole drilled for the piping, this would most likely need to be engineered right?

[Murray_Calavera]

34 minutes ago, Wazmond said:

Also, been reading up more about crossover fmic in regards to the legality of having the hole drilled for the piping, this would most likely need to be engineered right?

If you are genuinely considering trying to get this engineered, I would strongly advise finding the engineer that is happy to sign that off first before you put the hole in your car. 

I've seen cars get defected for this and not be able to be put back on the road as no engineer they spoke to was happy to sign if off.  

[MBS206]

21 hours ago, Murray_Calavera said:

If you are genuinely considering trying to get this engineered, I would strongly advise finding the engineer that is happy to sign that off first before you put the hole in your car. 

I've seen cars get defected for this and not be able to be put back on the road as no engineer they spoke to was happy to sign if off.  

Depending where the whole gets drilled, and what country/state you're talking about, quite likely not.

 

Under ole vehicle mod rules in NSW, VSI06 allowed for drilling of holes in "non structural" areas. So you could drill a hole through the inner guard, and not need engineering. You couldn't drill over seams, and it was advised to add extra reinforcing around the hole, as well as something to protect from sharp edges.

 

Again, it's all about finding the documentation for where the mod is to be done, AND then being able to explain the situation, with the documentation as to why you don't need engineering, with a positive attitude, to any one of the likes eg, police, vehicle inspector, etc.

[GTSBoy]

Meanwhile, 20+ years ago, I pulled out the 105mm hole saw and went straight down through the inner guard in front of the airbox to get my stormwater pipe cold air intake in. Right behind the two stock holes for the intercooler pipes. Those have no reinforcement (apart from a couple of robust pieces of steel pipe through them!).

I feel that the Australian vehicle standards crews put way too much emphasis on "maintaining the crash performance" of cars and not enough consideration of "any crash is a new and wonderful experiment with a random selection of parameters and you will never be able to tell if an extra 80mm hole through some sheet metal caused a significant difference...but if you close your eyes and squint at the whole structure, engage your engineering brain and have a good think about it, you'd have to expect that it would do jack all."

[Wazmond]

I noticed theres piping between the A/C and the stock intake piping(just before the crossover). What has people done for this? Should i be creating a nipple for the pipe?

[Duncan]

Can you post of pic of exactly what you mean? 

Unless you have a fancy aftermarket intercooler, the AC and intake are not connected in any way

[Wazmond]

 

[Duncan]

lol thanks for the pics but some arrows might have helped for context.

If you mean the bit I've badly traced in red, that is a PITA vacuum signal for the power steering pump, only R34 GTT was "lucky" enough to get it. Yes you will need a nipple of the same size somewhere in the intake between the air filter and the throttle or the power steering idle up will not work correctly

[Wazmond]

Apologies... thought i had outlined it...

Cheers for the response, I'll get a nipple sorted out for this.