I am not talking about cam pullies, I was refering to under drive pullies which should be good for 5-7hp.
The stock fan is run by the crank which is another small power loss. If you use an electric you should see another 5-7hp.
You are right about the intercooler, so if you go with what I just suggested and upgrade on the innercooler. That would be 12hp for the fan, and under drive pullies, and 20 or so for the intercooler shouldn't that be over 400? You could also try one of those water injection kits that spray onto the intercooler for a few more hp as well.
