info on a 1986 5.0

[my70stang]

ive finally found a good mustang for my 1970 engine swap...what i would like to know is if there are any drawbacks from a 1986 rather than a 1989-1993 5.0.

any help would be greatly appreciated

thanks,

taylor

 

[dans89lx]

ive finally found a good mustang for my 1970 engine swap...what i would like to know is if there are any drawbacks from a 1986 rather than a 1989-1993 5.0.

any help would be greatly appreciated

thanks,

taylor

the heads suck dick

 

[v8only]

not a concern if he's swapping the motor out. 86's are badass, and speed density, if you stay efi, you may want to update to mass air, other than that, go with the 86, can't beat the look!

 

[my70stang]

the heads suck dick

whats so bad about them?

 

[v8only]

are you using the 86 mustang motor for a 70 ford, or the 70 engine for the 86 mustang??

the 86 heads were called swirl heads, they were a one year only head that were designed to reduce emissions. That they did, and power robbed 25 horses from the 5.0 too, and are useless to build up. Additionally the 86 motors had flat top pistons with no valve reliefs, so you basically can't use any other head on that motor (there is one that will work though, twisted wedge, I think)

 

[my70stang]

are you using the 86 mustang motor for a 70 ford, or the 70 engine for the 86 mustang??

the 86 heads were called swirl heads, they were a one year only head that were designed to reduce emissions. That they did, and power robbed 25 horses from the 5.0 too, and are useless to build up. Additionally the 86 motors had flat top pistons with no valve reliefs, so you basically can't use any other head on that motor (there is one that will work though, twisted wedge, I think)

im going to be using the 86 motor in the 70

 

[85ragtop]

im going to be using the 86 motor in the 70

If you ever plan on a cam or new heads you will have to change the pistons.

 

[wild86stang]

Not entirely true, as was already stated, you can you Trick Flow heads with a decent sized cam. I'm running the stage 1 with 1.7rr's, Trick Flow claimed I could even run the stage 2, but I didn't want to.

 

[85ragtop]

Not entirely true, as was already stated, you can you Trick Flow heads with a decent sized cam. I'm running the stage 1 with 1.7rr's, Trick Flow claimed I could even run the stage 2, but I didn't want to.

Thats good to know. I was always told not to do it. Thanks man I know a guy with an 86 and this news will make him happy.

 

[wild86stang]

No problem, glad I could help out a little.

 

[nonglossjason]

I used afr's on my 86 with no problems. Some times they work and sometimes it doesnt. Just gotta check the piston to valve clearance thats all!

 

[my70stang]

so how does the mass air work with the 1989's, i heard they have something called MAP...whats the difference?