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What chip should I go with? I have looked at all sorts including the programmers that can be purchased. The Diablo has my full attention as of now for it's aggressive programming that I have been reading about. What could I expect from it? I have a 96 4.0 OHV Explorer with a K&N aircharger, High flow muffler, and a B&M shift plus(Electronic). At time of purchasing the chip I am looking at a aftermarket cam from Comp, so keeping this in mind also what would be best and for future modes.
Looking at the Hypertech Programmer III what comments can someone give me on this product? Would it be worth it?
One other question, When you say I am looking at 18-21 hp with the chip are you meaning by itself. As I have been researching I have understood that a basic chip(not custom) would give that much increase in HP itself. Would adding the cam and other aftermarket parts give me more increase of HP with the chip? or does the chip just make the cam work more properly with the engine. I guess what I am saying is that if I am running a cam without a chip it would be working say half (50%) of its full potential meaning it would not give me all the hp and torqe that it can give and adding a chip would make the cam run at its full potential (100%). In this I would gain 18-21 Hp with the chip and in addition of the cams Hp & Torqe (lets say it produces 15-20 Hp & ?? torqe), meaning that I am gaining around 40 hp & ??? torqe.
1 + 1 does not equal two. In other words, adding a 10 HP part and a 20 HP part does not yield 30 HP. The only sure-fire way to know is with a dyno pull. The chip will increase over stock and so will the cam, but the biggest reason for the chip with the cam is getting the engine working correctly. I'd say in combination with the cam, you're looking at cam HP + 15HP rwhp, maybe more but it depends a lot on the cam you're looking at. Sure with the right cam and a chip you can gain more than 15HP from the chip, but cam's often involve compromise so where do you give it up... top or bottom?
Its not a matter of taking 50 hp from the top and putting 50 hp on the bottom and visa versa. But generally all with cams you have some compromises, otherwise manufacturers would just put the more agressive cam from the factory. Too agressive and you get that rough lopping idle you often see on a hopped up muscle car and poor bottom end acceleration. In that case, you don't hit the power until you get into the upper range but then it comes on like a bat out of hell. A mild camshaft does better for idle and initial acceleration but runs out of breath on the top. This is why so many people oooh and aahhh over the variable cam technology in the VTech. It involves less compromise.