steveo412

i have 86 5.0, buddy has an 88 or 89 crown vic 5.0 ho motor , wandering if the heads would be different and if so, would their be a plus or neg in power increase. my motor smokes at start up and when you hit the gas so i was thinking of pulling the heads off and having them checked out, on the vic motor:confused. stock motor , just 30 over stock cam, bbk 65mm throttle body, power pullys, flowmaster x-pipe with dumps, nothing special. any imput would be nice thanks.

mjr46

crown vic motors were often equipped with the same crappy e6 heads that 86 mustangs were

steveo412

does anyone know what years are different? and what kind of change it will give me

Shelty

'87-93 had E7s... not a huge step up but certianly better than E6s... E6 heads are only good for doorstops....

you could prolly find a set of ported e7s for cheap...

but the best factory head you could get your hands on is the GT40 head off of the 5.0 explorers up to 96.5... all after had Gt40P heads which require different headers for sparkplug clearance... those can be had for a few bennjamins

steveo412

thanks for the info

Shelty

yup no prob man...

if you find a 5.0 explorer at a JY, grab the Intake off of it too, it flows better than the mustang, and if you still have the factory '86 intake manifold, it will flow even better...

couple that with a good cam and you'll make some good power

steveo412

buddy owns a junk yard and he has 2 5.0 explorers out their, yea i have the stock intake on their, so im better off stayin with that instead of after explorer intake

steveo412

with the gt 40 heads will i tell a difference over the e6, ever since i bought it , it has smoked at start and when you take off, i think it the valve seals

Shelty

I worded it wrong, the 5.0 explorer intake is better than the mustang intake...

as long as the blocks/ motors are sound, it would be better if you yanked the whole motor, swapped out to a nice crane cam, get some 1.7 roller rockers and toss your whole '86 motor, if the money allows...

cuz the '86 5.0 have flat top pistons with no valve reliefs...

just a suggestion... the '86 5.0 was a pig...

steveo412

yea mine is a major pig, i think im gonna go tomorrow and look and see what my buddy has out at his yard and go from their, is the explorer motor better than what i got or should i just steal the heads and intake off it, he has an 88 5.0 ho continental motor and an 88 or 89 crown vic both of those motors are ho motors