I'm one of the moderators of TempoTopaz.com and will soon be taking over the Webmaster position. As such, i'm well familiar with that site. Glad that some of you guys over here now of it though
As far as horsepower goes, do the math. The 2.5L HSC motor is 153 cubic inches. A reasonably well thought out normally aspirated street motor can achieve 1.5 hp per cubic inch without a lot of fuss. This would equate to appr 230 hp based on 153 cubic inches. Since i'll be running a heavily modified & decked HSO ( High Specific Output ) head, flat top pistons, appr 10.5:1 compression, a custom ground cam ( .550 lift with a split pattern 224 / 230 duration @ .050 ), full roller rocker arms, a TRUE high pressure ram air system, aftermarket C&L MAF, larger Throttle Body, Ford Racing injectors, high volume fuel system with a variable pressure regulator, a custom designed header, no cat, a high flow straight through muffler, etc... my calculated output of 175 - 200 HP is actually pretty conservative.
As far as running a Vulcan goes, that would be a LOT more work. My car is already set up for the 2.3 HSC motor. As such, the longer stroke 2.5 motor is a drop-in.
Other than that, making 200+ hp out of a Vulcan would be cake. It could pretty much be done using factory Ford parts IF you know what to do. If you've spent $4K and you're just hitting 200 hp, not enough homework or shopping around was done. I've got less than $1K into my motor & that started with a brand new FoMoCo block in the crate with all of the aforementioned custom made parts. Then again, i've got two less cylinders that i need to buy parts for, only one head and a single exhaust system, so that could equate for slightly higher costs. Not $3K worth though.... Sean