build diary

September 12, 2005: More horsepower.
Well, just a little bit. It's hard to say what the peak power is because it jitters around at the top end (mostly due to the way the dyno works) but it's definitely in the high 140's. Not bad for a 1.6! This evening I spent a bit of time comparing the short vs long runners once the fuel was dialed in a bit more. How did it do? Well, you can see the chart here. Red is the long runners, blue is the short. The long runners idle better and make a definite difference in the midrange. Right at 5000 rpm it sucked up a bunch of fuel and had to be fattened up. Above 7000 it got rich with the long pipes and was probably not flowing as much air, but it's a bit tough to tell from the charts how much less. I'll take 4 lb/ft in the midrange over a couple of hp above 7000 rpm though. This means I need to hunt down a new air filter. ITG makes one, hopefully I can find one somewhere.

So, almost time to put the beast together and drive it! Well, I'd like a hood before it goes too far. I'll build some solid motor mounts for the car tomorrow before cutting any sheetmetal. This will keep the intake from moving around as well as the exhaust. The car already has everything else bolted up solidly including the transmission so it's not a big deal.

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