Quick Question

[S3 MCW]

Have noticed recently when doing about 50 in 6th gear say and then put my foot down there is like a kind of "chatter" noise from the turbo. Don't get the noise when I change down a gear to 5th and accelerate. Have the B5 TIP and cone filter. Any ideas? Broken DV? Thanks in advance.

 

[Adam P]

Potentially the recirc valve, is yours oem or aftermarket?

 

[S3 MCW]

oem, will prob change the dv and see what happens - the forge 008?

 

[Jenno007]

I would just get another OEM one personally

 

[george_seamons]

It's the turbo surging from the increased airflow. Too much air for it to use basically. Nothing to do with the recirc valve

 

[S3 MCW]

hi george, you sure buddy, would save me some quids if so.

 

[george_seamons]

How long have you had the B5 TIP on?

It should also do it in lower gears if you try to accelerate too quick from too high a gear, which puts a lot of load on the engine (so like 30 in 4th, then foot flat to the floor or something like that).

I dare say it was fine before the TIP, the car is unmapped, and it has only done it since the TIP was fitted
?

 

[kwistof]

I had similar symptoms and it turned out to be a split hose.

I'd check all the hoses and clips - every single one... then re-check again before splashing out any sort of cash.

You can test your current DV as well to see if it's holding pressure.

 

[Essflee]

It's surge like george says.
Mine did the same, my car was already mapped by Revo when I put the B5 tip on and I was getting surge, so I took the tip off and put the original tip back on and car was fine.
My map would need tweaking to cater for the B5 tip.

 

[S3 MCW]

thanks for the replies fellas, haven't had the TIP on for long - don't recall it doing this before, but will go check those hoses.

 

[SamHendry]

It's surge like george says.
Mine did the same, my car was already mapped by Revo when I put the B5 tip on and I was getting surge, so I took the tip off and put the original tip back on and car was fine.
My map would need tweaking to cater for the B5 tip.

Another quick question. I got my s3 APY mapped by revo with smic's. Now if I fitted fmic would I need map tweaked?

 

[sakib]

I have badger 5 tip and jetex cone filter and my is stock not mapped either and i dont get that chatter but that chattering noise i did get when my stock dv was faulty

 

[george_seamons]

If the car chatters when changing gear, it's the recirc valve. If it's does it when under load it's surge. The two sound quite different though.