Thanks for the replies.
Some of the late Jap spec TT's came with VVT-i, from 1998 on I believe. I didn't know this when I bought my car but the VVT-i is a real PITA when it comes to tuning. There's parts available but you're more limited with what you can do, they're more expensive and nobody, especially in the UK has much experience with them.
Engine wise I have a Hiper exhaust with both cats removed, Super power flow, HKS FMIC, SQV and water injection. I did have a FCON5, GCC and AVCR on the car but after I discovered it was running MAD rich I had a falling out with the tuner and removed them. The fuel cut was in the FCON map so I thought no problem, fit a fuel cut device and run less boost for now until I can afford to change the turbos. Problem is I can't get it to work!!
With both cats removed I'm making around 1.2/1.3bar so I know I'm not getting boost creep. I have NGK plugs rated for the increased boost but I'm swapping these today/tomorrow for some HKS S40i's just to be sure.
I've followed the instructions on the MKIV.COM page and verified these with HKS Europe. It's definitely wired correctly with a good earth and power. HKS tell me the FCD isn't VVT-i specific, you simply wire it in and go. I know it's not favoured in the US but I just wanted to find out if anyone with a TT VVT-i had ever fitted one. I can't find anyone in the UK that has, not to a VVT-i anyway. I don't know if there's something wrong with my car or if you need to mod something else to avoid fuel cut.....?
As for extra power I think the VVT-i gives another 30BHP but I'm not sure. I just wish I didn't have it on my car!!!
Cheers,
Nick
