Pipercross VS K&N panel filter (Astra GTC 1.6T)

[Kieran]

I have the pipercross foam panel filter on my J (1.6T 180ps with a EDS stage 1 tune). I've had the filter in for 35,000 km (3 years), cleaned it twice. No sagging issues so far.

If you don't mind me asking, how long have you been running that map? How many years/months and how many miles? what are the figures/results like and have you experienced any problems with the gearbox?

Just when testdriving my car a couple weeks ago I noticed the unfamiliar whining noise, and of course it was the dreaded M32.. This was at 20k miles but the dealer had a brand new gearbox from Vauxhall fitted and supposedly its a newer superlative gearbox, wether that's true or not I don't know, if anyone would like to confirm if the newer boxes come fitted with uprated bearings that would be great thanks!

But yeah I would like to hope a map/chip wouldn't run me a much higher risk of destroying my gearbox, at least I would hope to get way more than 20k miles out of it!

I have an automatic gearbox, the 6T45 which can go up to about 330nm. I'm probably running about 200-210hp, 280-300nm with the tune. Had the tune since 16,000 km. I did have an engine problem though, but I believe is not really from the tune - the tune only highlighted it more. Had hesitation on hard acceleration and eventual misfire (after a couple of weeks). I've read in different forums from astras and cruze's (same A16LET) that is quite common regardless of tune. Root cause would have been failed ignition pack which then damaged the spark plugs, and eventually the integrity of the block (compression leaks) from the misfires. Had a brand new engine put in under warranty at 24,000 km. I flashed back the tune at 27,000 km and still have it on now.

Ahh I was assuming you had the same car as me, my bad haha. And is that problem with the engine common when tuning? I know the corsa VXRs had problems with the A16LET but I heard somewhere that the GTC s had upgraded injectors which fixed these problems?