N249 Bypass guide LCR

[ReDBull]

Sound like a very simple mod with contrasting out comes! Confused!?!? Could it be some folks like the noise it makes and some don't??? I'll give it a go at the weekend. Do any tuners recommend doing this?
Still surprised people put a T piece into the FPR for there boost gauges surly the DV to N249/inlet manifold is safer?

 

[LEE69]

Mines been T'd of the FPR for over 2 years now.
As long as the connections are tight.

 

[ReDBull]

Fair enough but I think I'll go the no risk way.
I'm interested to see if this makes any difference.

 

[8bit]

I originally went straight from the inlet mani (where the N249 used to connect to) to the DV, using a 4mm internal diameter silicone vacuum hose. When I noticed it made a funny noise going from part boost to off boost I wondered if maybe the silicone hose was collapsing under vacuum so I undid the bypass, connecting the 4mm hose to the N249 and using a piece of 5mm hose to go from N249 to the DV.

I decided to try it again so used an elbow joint to connect the 4mm hose to the 5mm hose but it still makes the same noise. Still not sure the car feels any better with the bypass in place either. I've read threads where people have said their car doesn't like the bypass, maybe mine is just one of those. Apart from a slightly worrying noise when dumping at part revs I didn't notice things were any better with the bypass so I think I'll just put it back.

One other thing on my car, I'm not using the 007p Forge valve, I've got the new DV008. I'll try my old 007p and see if the same noise happens with the bypass.

Lee, did you blank off the second nipple on the intake mani since you T'd into the FPR feed for your bypass?

 

[LEE69]

Lee, did you blank off the second nipple on the intake mani since you T'd into the FPR feed for your bypass?

No, i just T'd into the one that feeds the FPR, it's all on the same vacuum

 

[8bit]

No, i just T'd into the one that feeds the FPR, it's all on the same vacuum

Ah, on the LCR there's two feeds under the manifold, one for FPR and the other to N249 - maybe it's different on the LC?

 

[LEE69]

The LC as more feeds i just T'd into that as it was at the end of the inlet.
I still have the N249 fitted, never got round to removing it.

 

[8bit]

Hmm ok, got a T-piece kicking around somewhere, maybe I'll try that. So is your vac feed from the manifold to the N249 still in place, yeah? Just disconnected the hose from the 249 to the DV?

 

[LEE69]

Yeah all in place, I just blocked the original hose to the dump valve.

 

[8bit]

OK cool, cheers. I'll have a play about at the weekend and see if I can make it work any better.

 

[8bit]

OK I tried the 007p valve, it makes the same "whip-crack" noise on dumping from part throttle/boost. Haven't tried the "T into FPR feed" method yet - Lee, what did you use to block off the original DV hose?

Might also try a larger diameter hose joiner for Robbie's method, don't think mine is as much as 5mm. Wondered if that was causing a restriction.

Did a quick log using Torque app for Android last night - my boost is peaking about 1.3bar, sustaining at 1.0 - 1.1. That's on stock map with the N249 bypassed. That sound about right or not?

 

[LEE69]

Lee, what did you use to block off the original DV hose?

A bolt

 

[Ben Cupra2]

I understand this is slightly different if on an LC. Is there a guide anywhere? I have searched but cant find it for the LC.

Thanks

 

[LEE69]

I understand this is slightly different if on an LC. Is there a guide anywhere? I have searched but cant find it for the LC.

Thanks

http://s174.photobucket.com/albums/w91/LEE_69/Leon/n249_bypass/

 

[LEE69]

http://www.seatcupra.net/forums/showthread.php?t=321767&highlight=n249+bypass

 

[Ben Cupra2]

Thanks a lot mate

 

[ArcticCupra]

just ordered my 6mm tpiece and some 4mm silicon hosing and gonna try and attempt this 249 bypass tomoz.. anything you thing should be noted haha im studying these pics and forums and seems all a bit confusing

 

[big eck]

How did you get on mate???

 

[ArcticCupra]

hahaha tbh ive still not done it, had the stuff sitting there n not bothered lol, ive been reading on to see if a should remove the thing on top of the 4th coil pack or just leave it, or leave it plugged in or summit, il need to get the finger out lol plus i only got 1m or silicon hose and i dont know if its gonna be long enough

have you done this before?

 

[LEE69]

Just bypass it for now, if you like it leave it.If not, put it back.