I currently have a 502 (509) Dart block engine with a 250 blower. I have 605hp at 5500rpm with 7 lbs of boost. No intercooler because there is no room in my engine compartment. I want at least 850hp. I need something low profile so I don't have to cut my engine hatch. The Whipple Quad cost almost twice as much as the procharger kit with intercooler. Should I go with whipple or procharger? Or, should I modify my motor and keep the 250 blower?

Something might be off with your current combo.. Your power seems a little low. The Procharger will make more power then the Whipple every time.

I would go n/a and skip the blowers. Unless you plan on upgrading your drive to scx or equal. after 550-600 hp say good buy to bravo stuff.

I'm fixing that problem. I'm planning on going with Arneson Surface Drives.

Check out www.stevemorrisengines.com/

I got 843hp @ 5600rpm with a M3SC using 088 heads and stock rotating assembly. Got 4 seasons on it. The good thing about the PC is your not always in boost.

+1,, also they are not as hard on the drives under 2500 rpm's..if you have the room in front of the engine go with a crank mount set up..wikked!http://www.cachassisworks.com/cac_su...rgerdrive.html

change your Heads to Dart Pro 1 CNC 335....with a 509 those heads and the right cam and 8lbs boost... 800hp+ would be no problem...if your choosing a blower the Whipple is the best choice.. easy to program vs the procharger(pain in the A**) and the benifits of adding a intercooler in you curent engine compartment ...4.0L whipple w/MOAC would be the right choice

How is a Whipple any easier to program then a procharger? What EFI control system do they come with? With the procharger you wouldn't need to spend the money on the heads to make 800+HP and you could do a simple blow thru set up if you didn't want the extra cost of an EFI system.

My sentiments too, if you run efi they both need to have efi mapping done to have it right in most applications, I own a pc but I think the whipples look much better BUT I'm not into looks, i'm into hp, Smitty