I was wondering how would i know if i have a H.0 motor. The guy i got it from says it came out of a 1986 cougar but would a non-HO motor have roller lifters? also i read the code xxx is casted into H.O blocks and this has that. its only a long block so i cant tell the firing order.

 

That early, it's highly unlikely that a non HO motor would have a roller cam. You can determine the firing order of a long block by turning the crank by hand and watching the valves. An 86 HO should have E6SE cast onto the head. You will find this on the bottom side of intake port on the second cylinder back, or number 2 cylinder and number 7 cylinders. You may need to use an inspection mirror, if the heads are on the engine. This stands for "1986 swirl cumbustion engine." The E6SE was only used on 86 HO's. All other HO motors use the the E7TE with the exception of the Cobra and Explorer motors, that use GT40 or GT40P heads. The 85 HO uses the eqiuvilent to the E7TE, but it's number is E5AE under the first intake port. Regular passenger car 5.0's such as used in LTDs ...ect also used E6 heads after 1986. However, these motors will not have the XXX marks in the lifter valley, a roller lifter cam, and the E6 heads all at once. If you find these things all at once, then it's a 99% chance it's an 86 HO.

The 86 HO was unique compared to the other HO's. Not only did it use swirl combustion chamber heads, but the forged pistons had no valve reliefs. It can't use a high lift cam, without fly cutting the pistons. The block is also an extra tough siamese bore casting used only on 86 HO's. The upper intake manifold had slightly smaller runners than 87-95 HO uppers, and the throttlebody was 56mm (IIRC), instead of 60mm. Ford ditched the swirl combustion chambers, and went back to the F150 truck heads on the 87-up HO's, because the E6SE head's unique combustion chamber shrouded the valves, restricting air flow potential. For example the four barrel carbed 85 HO, using the same roller cam, but without a true dual exaust; made 10 more HP. The E6SE heads do actually make more tourqe, get better gas milege, and have very clean exaust emissions though.

 

yeah it does have e6 heads and has the xxx block and roller lifters. how much hp and torque does it make?

 

200HP and 310 ft-lbs.

 

this motor will go in a 1991 f-150 will i need to change computers for the cam being a different firing order or is my truck the type of fuel injection where it uses 2 banks or sesquential fuel injection?

 

As far as I know the truck FI is bank fire. Mass air computor systems are sequential not bank. However, you most likely will still need to covert to mass air, because the HO cam is more agressive than a truck cam. The 91 truck speed density computor will be programed for the truck cam, and air flow parameters. The HO cam may confuse the truck SD program. Since the HO cam uses the 13726548 351W firing order, you may need a Mustang mass air conversion kit (pt # M-9000-A51)- provided your using a manual trans. The mass air kits from Ford aslo convert from bank fire to sequential fire. The truck mass air kits use the 15426378 firing order, but can be used on 94-96 truck 5.0's, that use the 351W firing order, with a modification. I don't know what this modification is? I would not reuse the truck intake manifolds, but convert the truck intake to a Mustang/Explorer type intake system, and frabricate a true dual exaust system, to get the HO performance, but then that will probably require mass air... Now the truck kit for automatic trans only works for AOD's. If you have a manual tranny, then your in luck. If you have an E4OD then you have a complicated problem. The 351 lightning computor works with the E4OD, but Iv'e heard it's a complicated modification. Someone else will have to chime in a here to clarify this bit, cause I don't know for certian.

 

I put a '92' 5.0 HO in my '88' F150 and used all the truck fuel injection parts. The only changes I made were the firing order and I put Mac equal length shorty headers on it. It runs great, pulls my 5000# race car and trailer much better than the old truck engine ever did and it's prettl quick for a truck.

 

James, that's good to know. So the truck SD computor still works with the HO cam. Since it's bank fire, the firing order isn't a concern.