1986 5.0 with 85 shortblock

spiff · 07-09-2006, 09:55 PM

Hey guys, quick question;
I've got a 86 stang, with the original motor.
I also can get a 85 5.0 motor from a 85 mustang for cheap too. What I intend to do is rebuild the 1985 rotating assembly and then swap the 85 shortblock into the car, using the FI intake and heads from the 1986 motor.

Will this work or will there be problems with this setup or will it suck? Also, can I use the 85 heads and bolt the FI manifold up to them?

Thanks everyone

Dark Knight · 07-10-2006, 11:59 AM

I'd use the 85 heads before using the 86 heads...the 86's are probably the worst flowing heads you can use..
Is the 85 engine from a stick car, or auto?

And check out www.foureyedpride.com

spiff · 07-10-2006, 06:50 PM

Thanks for the reply Dark Knight.

I am not sure if its from an auto or manual... But my car that its going into has a AOD

spiff · 07-10-2006, 06:50 PM

oh and thanks for the link I'll check it out! ^_^

Dark Knight · 07-11-2006, 10:54 AM

Well, if the 85 engine is from an auto car, it has the flat tappet cam, the 85 stick cars have the roller cam.

spiff · 07-11-2006, 10:06 PM

Ah okay! Thanks for clearing that up... So, if its from a stick, and therefore a roller, on the aircleaner will it be labelled as a 5.0 HO? and the auto engine as a normal 5.0?

Dark Knight · 07-12-2006, 09:20 AM

The air cleaner on the roller will say 5.0 liter 4V HO,
http://www.mustanggt.org/photo/85clark3.jpg
I think the auto cars say 5.0 liter EFI HO
http://www.mustanggt.org/photo/85eggleton4.jpg

spiff · 07-12-2006, 07:15 PM

oh thank you so much Dark Knight, you've saved me a bunch of trouble I can already tell. I'll be sure to go check what the aircleaner says once I have some spare time.

Dark Knight · 07-13-2006, 08:52 AM

If you rebuild the 86 short block, make sure you get different pistons. The stock ones dont have enough valve relief to run much more than the stock cam.

07-09-2006, 09:55 PM	#1
spiff Drop your guns Join Date: Jul 2006 Location: Great White North Posts: 5	1986 5.0 with 85 shortblock Hey guys, quick question; I've got a 86 stang, with the original motor. I also can get a 85 5.0 motor from a 85 mustang for cheap too. What I intend to do is rebuild the 1985 rotating assembly and then swap the 85 shortblock into the car, using the FI intake and heads from the 1986 motor. Will this work or will there be problems with this setup or will it suck? Also, can I use the 85 heads and bolt the FI manifold up to them? Thanks everyone

07-10-2006, 11:59 AM	#2
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: 1986 5.0 with 85 shortblock I'd use the 85 heads before using the 86 heads...the 86's are probably the worst flowing heads you can use.. Is the 85 engine from a stick car, or auto? And check out www.foureyedpride.com __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

07-10-2006, 06:50 PM	#3
spiff Drop your guns Join Date: Jul 2006 Location: Great White North Posts: 5	Re: 1986 5.0 with 85 shortblock Thanks for the reply Dark Knight. I am not sure if its from an auto or manual... But my car that its going into has a AOD

07-10-2006, 06:50 PM	#4
spiff Drop your guns Join Date: Jul 2006 Location: Great White North Posts: 5	Re: 1986 5.0 with 85 shortblock oh and thanks for the link I'll check it out! ^_^

07-11-2006, 10:54 AM	#5
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: 1986 5.0 with 85 shortblock Well, if the 85 engine is from an auto car, it has the flat tappet cam, the 85 stick cars have the roller cam. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

07-11-2006, 10:06 PM	#6
spiff Drop your guns Join Date: Jul 2006 Location: Great White North Posts: 5	Re: 1986 5.0 with 85 shortblock Ah okay! Thanks for clearing that up... So, if its from a stick, and therefore a roller, on the aircleaner will it be labelled as a 5.0 HO? and the auto engine as a normal 5.0?

07-12-2006, 09:20 AM	#7
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: 1986 5.0 with 85 shortblock The air cleaner on the roller will say 5.0 liter 4V HO, http://www.mustanggt.org/photo/85clark3.jpg I think the auto cars say 5.0 liter EFI HO http://www.mustanggt.org/photo/85eggleton4.jpg __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

07-12-2006, 07:15 PM	#8
spiff Drop your guns Join Date: Jul 2006 Location: Great White North Posts: 5	Re: 1986 5.0 with 85 shortblock oh thank you so much Dark Knight, you've saved me a bunch of trouble I can already tell. I'll be sure to go check what the aircleaner says once I have some spare time.

07-13-2006, 08:52 AM	#9
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: 1986 5.0 with 85 shortblock If you rebuild the 86 short block, make sure you get different pistons. The stock ones dont have enough valve relief to run much more than the stock cam. __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help needed on buying a 351W shortblock.	eddielugnutz	Windsor Power	1	10-20-2005 07:04 PM
1986 vs. 1994 mustang	chiaronate	Windsor Power	9	10-14-2003 11:29 PM
1996 Cobra vs 1986 Porshe 944	Milktasd	Stang Stories	4	03-19-2002 08:46 PM
Need advice on Shortblock...	MustangDanny	Windsor Power	8	01-14-2002 05:29 PM
Shortblock	swtstang	Windsor Power	2	07-05-2001 06:43 AM