Hi all, I put a 96 Explorer engine. I understand that is 210 net hp and my old engine is 210 hp gross equals net 140 hp, is this correct? If I use the intake manifold and carburetor motorcraft of 75 I still have my engine to 210 hp net?, Or what is the combination of multiple carburetor I need to have those net Hp? tks
Really no way to tell without a dyno. Doubt the used engine is even at it's net HP level. But I would assume that placing the stock 75 intake and carb on it will drop the HP output.
the heads and cam are more efficient on the explorer than the ones on the motor the the original intake and carb are from. also your exhaust system factors in. so the first question is why do you need to know your net hp numbers or why are trying to achieve those net numbers?
Bryant The numbers are so reference for take the same performance without EFI sistem. Maverick1970 I think the same, but the calculator of Holley say if I run no more 5000 rev i need some 350 cfm whith engine 302 and in the recomends are one 350 cfm, my motorcraft is almost 350 cfm or not?
i dont understand what you are saying. are you trying to figure out what size carb to use? if yes then a 600cfm carb will work nicely on that motor. you should end up with over 210hp with a 4barrel carb, intake manifold and dual exhaust. i would guess somewhere in the 225-250 hp zone
Thanks Brian, I want to do is that the engine has the most similar performance like EFI, which of the carburetor and intake can recommend me?
I've run one of these with a carb. I used a Ford Racing A321 intake, which is the same as the old 1960's Cobra high rise dual plane. I topped it with a Holley 570 cfm Street Avenger. Run it with a set of full roller 1.7 rockers. With this setup, I removed the choke assembly (as I do with all my Holleys) and it would run exactly like it had EFI. Cold starts down to 25*F without having to prime the intake with a pump shot from the accellerator pump. All you had to do was crank it for 10-15 seconds and it would fire up and idle by itself. The ignition was a stock Ford points distributor, with the points replaced with a Crane XR-1 electronic module, fired by a Mallory Promaster coil. Great street combo, pulls from idle to 6000 rpms. Smooth power, no flat spots. Good fuel economy too. You will need a steel geared distributor to match the roller cam. As for the HP output? With Tri-Y headers and the 1.7 rockers, I feel comfortable saying that it's likely in the 250-275 hp range with gobs of torque.
any dual plane intake will get you similar performance to the efi. the efi will have a broader power band and makes more torque due to its long runners. any 600 cfm carb will feed that motor. you will want an electric choke to help it get close the starting ability of efi.
