'86 Mustang block

[FastGallopingPonies]

What's the difference of a '86 mustang block? did 86's come with E7's ? I'd look it up but I'm at school and can't get anywhere. Heard about one for sale locally and I want to start the slow mild build for my '88

[DuceAnAHalf]

E7 means 87, i doubt an 86 would have had them

[Lincolnmania]

the block is ok, but the pistons arent good for anything more than the stock cam......they are flat tops....no valve reliefs

[FastGallopingPonies]

Duce do you have a readers rides or something? I'd like to shoot for times close to yours. what have you done as far as weight reduction? if you wouldn't mind sharing what kind of Numbers are you making without the nitrous?

edit : nevermind found it.

[FastGallopingPonies]

alright thanks Scott.

[Spaz]

from what i understand the '86 5.0HO package shares a great deal of components with the SEFI lopo motors. Shame they didnt keep the setup around as an option or a replacement for the lopo since it uses the same heads

[88grandmarq]

block, rods and crank are essentially the same for 85 up passenger car motors. 86 HO motors use a flat top piston with NO valve reliefs. 86 HO motors also use a E6SE heads, which are the same as the lopo heads and dont flow worth a damn. 86 HO cam is similar to the 87-89 cam but not quite as agressive.

[Spaz]

dont the lopos also have the flat-top pistons without reliefs? if so sounds like if youve got the radiator out of the car it would be a good opportunity to change to the '86 ho cam(maybe without removing any body anels on a towncar, change the dizzy firing order and swap in the '86 ho speed density computer

[cld783]

people knock the e6 heads way to much, they arent great but they arent as bad as people believe. i've seen some pretty badass 86 ho stangs with stock heads and i've even seen a stock 86ho run vs a stock 89 ho, the 86 always pulled on the 89 out of the hole.

stock motor with e6 heads/flattops produce more compression and torque, most people hate them because they dont make the extra 5-10 hp on the dyno but due to the flattops you really have to be careful of piston to valve clearance when changing cams.


"The new heads for the 5.0L in '86 were the redesigned "high swirl" cylinder heads (E6SE casting type). 1987-1995 H.O. motors used truck casting wedge cylinder heads with larger ports and valves, ( casting # E7TE-AA ). They provided an approximate 15 hp increase over the S.O. (E6SE) heads. The S.O. 5.0 used the E6SE heads through '91, while the H.O. engine only used them in '86. The E6 Heads are known for provideing one of the broadest torque bands, especially from an engine with only a 3" stroke"

[mrltd]

Yeah, e6'd had more low end- that's it. The four eye cars also wieghed less.

[cld783]

its all about the right setup.

I wanna know what this guys packin.. lol that bitch sounds nasty http://youtube.com/watch?v=1veaear5b4M

[88grandmarq]

dont the lopos also have the flat-top pistons without reliefs? if so sounds like if youve got the radiator out of the car it would be a good opportunity to change to the '86 ho cam(maybe without removing any body anels on a towncar, change the dizzy firing order and swap in the '86 ho speed density computer

pistons are not the same between the 2. lopo pistons are cast flat tops with a slight dish in the center half of the piston.
86 pistons are true flat tops.

[Tiggie]

Probably one of the best sites ever: http://www.jason.fletcher.net/tech/s...ons/specs2.htm

http://www.jason.fletcher.net/tech/specifications/specs1.htm

[gadget73]

The 86 HO cam had less duration on the exhaust side, but a more aggressive ramp, I've actually heard it argued that overall its slightly better than the later HO cam. I don't know how true this is, or really how much it would even matter. Its probably a fairly small difference either way.

[1987cp]

Probably one of the best sites ever: http://www.jason.fletcher.net/tech/s...ons/specs2.htm

http://www.jason.fletcher.net/tech/s...ons/specs1.htm

+1 Great site, I've looked up lots of stuff there.

I don't remember offhand; does "Fletch" mention that the '86 true flattops are still forged, and that they're still good for performance use if you have the time to notch them for a bigger cam? Car Craft did spray their bone-stock '86 shortblock to 650hp (with AFR heads, etc.) after notching the pistons. No carnage whatsoever, even after shooting four-foot flames out the carburetor.