^ Ok no problem :). I'll find them on my hard-drive and let you know
I've been toying around with the idea of shorter trumpets/ram tubes lately as the engine bay heat being sucked into my open 110mm tubes wasn't doing the performance any favors. I reverted back to the standard curved rubber trumpets for a few weeks and even though the car felt a little more sluggish, the engine much preferred the nice cold air it was ingesting from the cold air intake.
Curiosity got the better of me and I decided to remove the rubber trumpets and run no trumpets whatsoever inside the plenum for just one day. The result was that the engine didn't really have any power down low, but as soon as it hit 5,500rpm the needle rocketed to redline, as expected. One thing I noticed with the factory rubber trumpets is that they're good for mid-range power, but once you get higher up in the rev range the power starts backing off a bit.
To cut a long story short (no pun intended), I decided to get a set of 60mm trumpets custom made which will fit perfectly in the standard plenum. You can actually fit as large as 70mm inside the plenum but it starts getting pretty cramped, so I decided that 60mm would be a nice compromise.
They arrived today and I was quick to install them. Upon my 20-minute test drive I noticed that the power down low had dropped off a bit, but up high it was all guns blazing. The full power band comes on from about 5,000rpm, all the way to 8,000rpm, which I discovered ends up being a good place to be as the engine is constantly in it's power band for the next gear when shifting at the 8,000rpm redline.
It's certainly going to take a bit of getting used to, but so far so good. I'm going to miss the sound my 110's made, and the torquey-ness of the standard trumpets, but when driving the engine at it's full potential the 60's seem to be a good choice
As always, here's some pics. The first 4 show the comparison between the old 110's and the new 60's, and the very last photo was taken by the metal spinner who made my trumpets, showing the clearance of a 50mm trumpet inside the stock plenum (essentially the same sort of clearance as my 60mm ones) -