N249 on a standard LCR, worth it?

[Vin-R]

hi guys! my LCRs pretty much standard at the mo, minor mods ive done are listed below. Just wanted to know, on my setup, will doing the N249 bypass make any noticeable difference??

thanks

Vin

 

[Cupra Ross]

It won't give you any more power. It speeds up DV reaction though, a worthwhile mod.

 

[Vin-R]

oh right, so it makes the car more responsive? I read somewhere, that the N249 is a safety feature for the turbo, by us by-passing the 249, are we creating any risks ?

cheers mate

 

[mrwookie]

The N249 is designed to open the DV when the ECU sees fitlike for instance in the traction control were to kick in then the DV would be opened. Obviously bypassing this will stop this happening.

 

[Cupra Ross]

oh right, so it makes the car more responsive? I read somewhere, that the N249 is a safety feature for the turbo, by us by-passing the 249, are we creating any risks ?

cheers mate

Saab, Mistubishi, Subaru etc all seem to have done fine for years without an N249 type device. Its overkill as far as engine management goes. The N75 Boost Pressure Control valve does a perfectly good job of regulating boost and in the opinion of many, the N249 is neither needed nor wanted.

Your car will be more responsive without it and no damage willl be done by bypassing it.

 

[Vin-R]

Thats fantastic mate! cheers for the words of wisdom!!

Will be doing this today or tomorrow! will let u know how i get on.

 

[Cupra Ross]

Good stuff mate, looking forward to hearing your thoughts.

 

[CupraMVR]

very true words cupra Ross. well said

 

[Cupra Ross]

Thanks John, high praise indeed sir

 

[Vin-R]

Hi guys, just about to take the car out to see if its made any difference. the mod was done last night.
Just one quick note, with the car being more responsive, will this have any effect on fuel consumption?

cheers.. will be back soon

 

[skahigh]

Nope.

 

[Vin-R]

hey guys!! all i can say is quality mod! throttle alot more responsive, seems to hold boost better too.. and i noticed the forge007 chatters now instead of a quiet dump like normal.. is this ok??

cheers

 

[Cupra Ross]

The "chatter" is probably just the dump echo through your air-box. I get a definite "pshhhht" but my induction is quite a bit different from yours.

As long as you've connected the top of the DV to a direct vac source from the manifold, it'll be fine. Make sure this is the case because the other "chatter" is actually compressor stall, its the sound of air trying to flow the wrong way over the turbo compressor blades. That puts a lot of stress on the turbine shaft and is not a good thing.

 

[Vin-R]

hi curpa ross, my bro-in-law did this for me, hes done it on his LCR too, exact to how it said in the guide, so ill prob put it down to echo through air box, the car pulls fine all through the rev range and no flat spots ... so do u think its ok ?? Oh, and it only chatters slightly now n then.

 

[2footpegs]

hi, jus did this today on mine but i used the orginal hoses and jus used a little plastic hose connector to connect the hoses is this ok? and do any of the other hoses need to be blanked off?

im not sure if i noticed that much diffrence since i did it but i do get a very faint chatter aswell.

 

[Cupra Ross]

hi curpa ross, my bro-in-law did this for me, hes done it on his LCR too, exact to how it said in the guide, so ill prob put it down to echo through air box, the car pulls fine all through the rev range and no flat spots ... so do u think its ok ?? Oh, and it only chatters slightly now n then.

It'll be fine mate. Enjoy!

 

[Rocky Rocastle]

hi, jus did this today on mine but i used the orginal hoses and jus used a little plastic hose connector to connect the hoses is this ok? and do any of the other hoses need to be blanked off?

im not sure if i noticed that much diffrence since i did it but i do get a very faint chatter aswell.

yeah it's only a vac hose so no probs with plastic and no mate, don't blank anything

 

[oxo]

hi mate dont suppose you've got a photo of how to bypass the n249 valve as im being thick and csrn't work it out thanks

 

[Cupra Ross]

hi mate dont suppose you've got a photo of how to bypass the n249 valve as im being thick and csrn't work it out thanks

LC or LCR?

 

[oxo]

lcr 225 mate