-
Guest, 🚨New Stock alert: Premium CUPRA valve caps now available in the store 👉 Order now from the merchandise store
Been there done that - didn't like it.
RobDon has done it and loves it (i think he still has it removed anyway)
Lots of various opinions, and results again seem to vary with individual car. It just didnt help my "chatter" problem at all (in fact i'm sure it got worse) so I reverted back to standard.
RobDon has done it and loves it (i think he still has it removed anyway)
Lots of various opinions, and results again seem to vary with individual car. It just didnt help my "chatter" problem at all (in fact i'm sure it got worse) so I reverted back to standard.
yeh - theres been a lot of people try it - just don't think as many have bothered to keep it that way.
Same pro's and cons really - tidies up engine bay - suposedly better dv response etc...
It took me about 10mins to do to bypass it (leaving it electrically connected so as not to throw any errors) - just a few hoses and t-piece - m0rk was a star here and showed me exactly how to do it.
Just made my dv stutter like crazy - which my dv relocation kit did too...
I think the logic behind it is that the vac reservoir helps to close the dv quicker - and when i removed it the dv didnt close as strongly, and hence gave the dv "chatter" i mentioned before.
Same pro's and cons really - tidies up engine bay - suposedly better dv response etc...
It took me about 10mins to do to bypass it (leaving it electrically connected so as not to throw any errors) - just a few hoses and t-piece - m0rk was a star here and showed me exactly how to do it.
Just made my dv stutter like crazy - which my dv relocation kit did too...
I think the logic behind it is that the vac reservoir helps to close the dv quicker - and when i removed it the dv didnt close as strongly, and hence gave the dv "chatter" i mentioned before.
Ah i thought it did the reverse as you moved the reservor so it was quicker. May give it ago and see
I'm still running with no vac res or N249, DV is running off manifold vac source, everything runs fine and DV response feels sharper and smoother, slightly louder too. I'm not running an N75 though, boost is controlled by the Apexi AVC-R so that may affect the results.
surely running without the vac res is dangours, if the engine cuts out you'll loose most of the brakes. with the vac res in there you should still be able to use the brakes effectivly for at least one push of the pedal, Or is that a different vac res?
not realy used to working on modern cars, I thought that there was only one vacume tank on cars. The servo that helps you push the brake pedal is powered of that tank via the manifold.
anyway so the tank you are removing, whats that for?
your best bet is to have a search on the n249 valve... decent how-to guide (for ibiza) here:
http://www.seatcupra.net/forums/showthread.php?t=42406&highlight=n249+removal
A lot of people have problems with the dv - either stuttering, poor response, or in some cases people remove it to try it, and see what happens. Like Rob, a lot of people feel that the dv response is quicker, stronger, and louder.
The way i understand it - the n249 opens and closes the vac reservior - when the vacuum is needed to open the dv, the n249 opens the vac reservior which increases the vacuum - thus opening the dv quicker.
http://www.seatcupra.net/forums/showthread.php?t=42406&highlight=n249+removal
A lot of people have problems with the dv - either stuttering, poor response, or in some cases people remove it to try it, and see what happens. Like Rob, a lot of people feel that the dv response is quicker, stronger, and louder.
The way i understand it - the n249 opens and closes the vac reservior - when the vacuum is needed to open the dv, the n249 opens the vac reservior which increases the vacuum - thus opening the dv quicker.
How do you find the apexi rob? As im hoping to unwrap one monday and have it fitted the same day! So really want to try this at the same time
The vac reservoir also aids the N112 valve (secondary air system to warm up cat quicker on cold starts) with its opening and closing, but as this is an emissions thing I have bypassed my N112 aswell (mainly becuase I broke one of the connectors on it and can't connect into the system).
In theory then, without the N249, and if you care less for emissions, the Vac res isn't needed.
This is because without the N249 to open the DV whilst throttle is open, the DV will only need to open when the throttle is backed off. And at that point there is vacuum in the system from the manifold, so it shouldn't need the reservoir.
What I want to know is does the vac res. do anything without the 249 operating?
In theory then, without the N249, and if you care less for emissions, the Vac res isn't needed.
This is because without the N249 to open the DV whilst throttle is open, the DV will only need to open when the throttle is backed off. And at that point there is vacuum in the system from the manifold, so it shouldn't need the reservoir.
What I want to know is does the vac res. do anything without the 249 operating?
I can't honestly see it doing anything - looking at the exploded diagram if the n249 isn't working, then the vac reservoir won't be opened/closed, so it'll just become useless....
The N249 is the last valve in the chain before the reservoir, isn't it?
I don't know.
having traced the pipes coming from the N249/N112 setup, i can see 3 that trail off into "hard pipes" that run underneath all the cables and pipes to the right side of the engine and emerge at the back of the bay.
1 of these hard pipes goes to DV (as standard), 1 goes to the inlet tract after MAF, 1 goes to vac res. I was unsure as to whether the hard pipes converge into 1 before seperating again on other side, or whether they are all seperate.
well, when i looked, i thought they were all seperate hard-pipes.. just running along-side each other under the various engine bits.
Can't really see from ETKA as its quite a small part of a very large diagram...
Can't really see from ETKA as its quite a small part of a very large diagram...
Similar threads
