Ok so I finally got my car over to Jabba for a remap last week. It went in with Mike for like 2 ˝ hrs before he came out and told me that the car’s running really weak standard (193 hp), he had his suspicions about the Star FMIC (as did I) so he recommended I change it back to Standard with the twin set-up.
The most he was able to get the car to was 223hp and around 250lbft running which I was disappointed about to say the least and I think he said it was trying to push out 1.9bars but was having problems (I’m not too sure how to check boost pressure so if someone could shed some light it’ll be helpful). He said there’s a restriction somewhere in the car and it seems to be the FMIC, the exhaust didn’t seem to be a restriction (and I doubt it’s the exhaust either as it doesn’t seem to be restrictive at all)http://00626e1.netsolhost.com/formoshun/s3/MIJ.htm.
Anyway to cut the long story short, I changed the FMIC back to the standard twin setup and managed to gain an extra few hp now Vag-com gives me 235hp and 260lbft max an extra 12hp and around 10lbft. So I thought it could be a boost leak. I’ve been looking around but haven’t been able to find anything really (a few pipes came loose with the higher boost but I re-secured them). The car feels great compared to how it was, or how I ever remember being, the boost and turbo spool starts at around 2’300rpm and goes up the rev range well. BUT it’s not producing the power outputs I’m looking for and I can’t figure out what other parts would be faulty as most of the engine bits are Standard (just some Samco hoses).
I’ve got some figures below for those of you who are interested, I would really appreciate it if someone could show me a chart of how the Requested boost Vs Actual boost charts should look like as standard, as I cannot figure out if my standard IC is leaking from anywhere (I’ve checked all the joints and they all seem to be fine) and I need something to compare it with. All the figures below were done in 3rd gear on full throttle from 1000-redline on straight roads. Roughly same outside temp.
Peaked 255.86 lbft @ 3360 rpm
Peaked 222.40hp @ 5320 rpm
Peaked 244.79 lbft @ 5000 rpm
Peaked 233.05 @ 5000 rpm
Ok I know the HP figures above don’t correspond with the figures I gave above but this was the first test I did after fixing the IC, I did some further tests which gave me 235hp and 260lbft. Anyway any help as to where the problem is would be great,
Peaked at 190.53gs @ 5720rpm
Air flow seems to be good as well. Below is the Dyno plot from Jabba.