how to tell H.O.from motor?
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srothfuss
Last night I stabbed the same guy 7 times in a row
Yeah, wouldn't it be easiest to see what the firing order of the cam is befor trying to decipher the stampings?
srothfuss said:
thats the thing I dont know if the HO rollers came with different stamps from the SO rollers.....cause only real difference is the firing order on the camshaft, other than that theyre both hyd. roller 302's. I mean hell they made HO rollers with both forged and cast pistons even, and I couldnt tell the difference. I know cast pistons tend to be lighter in color when cleaned up, where as OE forgings are dark...and mine have CA stamped in the part # on the face of them, indicating cast.
z2o_what
Member
the xxx's and yyy's dont mean anything important ... it was probally just a shift change at the factory, or something like that.
Maryland Stang
Active Member
If it's a roller block and it has reverse rotation the only real way to tell is to measure the lift of the cam.
there are some older stang engines that the firing order is the same as a sbc..1-8-4-3-6-5-7-2.
so what you guys are saying, is that the casting numbers on the block and the vin number don't mean ****??
i know an s code is a 390 motor. that does not necessarily mean that the motor that is in the car is correct.
i will go to the shop later and get the code book that we use.
man i remember back in the day when cars had their original motors....
so what you guys are saying, is that the casting numbers on the block and the vin number don't mean ****??
i know an s code is a 390 motor. that does not necessarily mean that the motor that is in the car is correct.
i will go to the shop later and get the code book that we use.
man i remember back in the day when cars had their original motors....
Maryland Stang
Active Member
jrichker said:
I have the greatest repect for you jrichker but this is wrong. This test will only tell you if it has a reverse rotation cam or not. My '95 F-150 has a reverse rotation roller cam in it and this engine is not an HO. It has a low lift cam, truck intake and cast iron exhaust manifolds. Like I said, it's not an HO.
I know all I'd have to do is switch cams and throw a set of shorties on it (the truck intake is better than a Mustang intake) to make it a HO but that doesn't change the fact that it's not a HO.
It's my opinion that the HO engine is more a package than just an engine. 5.0 block with 9:1 compression, HO cam and intake, tubular exhaust manifolds and true duals with H pipe crossover. And since it uses a specific computer there may be a performance tune made just for the Mustang.
Maryland Stang
Active Member
venom97 said:
That would be the majority of it, yes. But the jump from my 185 HP F-150 engine to my 225 HP Mustang engine needs a few more parts. The cam alone isn't going to make a 40 HP difference. BTW, for those who wonder, both blocks are grey in color and they both have E7TE heads on them.
Maryland Stang
Active Member
Lxstang306 said:
My non HO motor in my truck has this firing order. The only thing the firing order tells you is that it has a reverse rotation (351 firing order) cam in it.
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