once and for all..e7 heads on a 86 motor! will the valves interfer?

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once and for all..e7 heads on a 86 motor! will the valves interfer?

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Mustang >> Ford Mustang Tech >> 5.0 Mustang >> once and for all..e7 heads on a 86 motor! will the valves interfer?

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once and for all..e7 heads on a 86 motor! will the valv... - 5/22/2008 1:18:05 AM

86GT 93LX

Posts: 2119
Joined: 10/18/2006
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i picked up a good set of e7s off of a 89 supposedly today. ive heard people say no, and yes, clay test it, bla bla, and that they had e7s on a 86, etc. i want to know for sure! i dont see why e7 castings would vary at all or 86 motors would vary at all. and yes i have flat top pistons, i know for a fact cus i saw them last year, absolutely flat.and yes 86 heads are differant than all other years. anyone with a 86 motor with flatop original pistons actually using e7 heads?
i plan on having these heads worked a bit. and no im not changing my pistons or having valve reliefs cut in or putting clay anyplace till im 90% surev one way or the other. thanks

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Poopar © Mustangforums.com

86GT, sunroof :P with built t5, offroad h pipe and some e7 stuff
85GT VERT with 86motor and aod, a work in progress

Post #: 1

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/22/2008 3:23:43 AM

projectresto83

Posts: 1278
Joined: 7/23/2006
From: Indiana(Stationed in Texas)
Status: offline

Clay test it and find out

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(in reply to 86GT 93LX)

Post #: 2

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/22/2008 3:54:45 AM

Joel5.0

Posts: 2788
Joined: 1/9/2006
From: Puerto Rico
Status: offline

quote:

ORIGINAL: 86GT 93LX

i picked up a good set of e7s off of a 89 supposedly today. ive heard people say no, and yes, clay test it, bla bla, and that they had e7s on a 86, etc. i want to know for sure! i dont see why e7 castings would vary at all or 86 motors would vary at all. and yes i have flat top pistons, i know for a fact cus i saw them last year, absolutely flat.and yes 86 heads are differant than all other years. anyone with a 86 motor with flatop original pistons actually using e7 heads?
i plan on having these heads worked a bit. and no im not changing my pistons or having valve reliefs cut in or putting clay anyplace till im 90% surev one way or the other. thanks

Unfortunately....... YOU need to check. The E6 heads/flattop pistons in Mustangs were a "special" design (if it could be called that). E6 heads have the valves deeper up the chamber to allow for clearance, reason why "many" of the '86 setups that switch to E7 style heads, have to notch the pistons to provide for clearance. The only aftermarket "exception" would be Trickflow heads.

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1986 GT-X303-1.72-5Spd.
Whatever it Takes
If it Ain''t a Ford, why bother

(in reply to 86GT 93LX)

Post #: 3

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/22/2008 8:07:33 AM

5spd GT

Posts: 732
Joined: 9/27/2007
Status: offline

I have seen some that clear and some that do not.

(in reply to Joel5.0)

Post #: 4

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/22/2008 3:14:01 PM

86GT 93LX

Posts: 2119
Joined: 10/18/2006
Status: offline

i just dont see how its possible unless the heads have been worked for it to vary at all

quote:

ORIGINAL: 5spd GT

I have seen some that clear and some that do not.

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Poopar © Mustangforums.com

86GT, sunroof :P with built t5, offroad h pipe and some e7 stuff
85GT VERT with 86motor and aod, a work in progress

(in reply to 5spd GT)

Post #: 5

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/22/2008 3:49:01 PM

Joel5.0

Posts: 2788
Joined: 1/9/2006
From: Puerto Rico
Status: offline

quote:

ORIGINAL: 86GT 93LX

i just dont see how its possible unless the heads have been worked for it to vary at all

Not all similar engines are EXACTLY the same...... tolerances in piston to deck + E7 chambers + camshaft + timing set + ...+... reason why you need to check your specific case..... or pay the price of not doing so if they don't clear.

_____________________________

1986 GT-X303-1.72-5Spd.
Whatever it Takes
If it Ain''t a Ford, why bother

(in reply to 86GT 93LX)

Post #: 6

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/23/2008 1:53:26 AM

86GT 93LX

Posts: 2119
Joined: 10/18/2006
Status: offline

quote:

ORIGINAL: Joel5.0

quote:

ORIGINAL: 86GT 93LX

i just dont see how its possible unless the heads have been worked for it to vary at all

Not all similar engines are EXACTLY the same...... tolerances in piston to deck + E7 chambers + camshaft + timing set + ...+... reason why you need to check your specific case..... or pay the price of not doing so if they don't clear.

when u get the valves done can they be recessed more? gt40 heads are the same possible deal too right? i would think all stock e6 blocks in mustangs would be closely the same as long as the cam is stock. i geuss the deal is even if they clear absolutely no cam could be used but a stock one? well i might start collecting parts to build a new motor. i got some falcon 302 heads layn around too with adjustable rockers but not sure if they work on a roller motor? are set of trick flows really worth it??

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Poopar © Mustangforums.com

86GT, sunroof :P with built t5, offroad h pipe and some e7 stuff
85GT VERT with 86motor and aod, a work in progress

(in reply to Joel5.0)

Post #: 7

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/23/2008 5:21:09 AM

mjr46

Posts: 10880
Joined: 6/13/2007
Status: offline

quote:

ORIGINAL: 86GT 93LX

quote:

ORIGINAL: Joel5.0

quote:

ORIGINAL: 86GT 93LX

i just dont see how its possible unless the heads have been worked for it to vary at all

Not all similar engines are EXACTLY the same...... tolerances in piston to deck + E7 chambers + camshaft + timing set + ...+... reason why you need to check your specific case..... or pay the price of not doing so if they don't clear.

when u get the valves done can they be recessed more? gt40 heads are the same possible deal too right? i would think all stock e6 blocks in mustangs would be closely the same as long as the cam is stock. i geuss the deal is even if they clear absolutely no cam could be used but a stock one? well i might start collecting parts to build a new motor. i got some falcon 302 heads layn around too with adjustable rockers but not sure if they work on a roller motor? are set of trick flows really worth it??

what would be really worth it is switching pistons so you are not limited to such things..there would be no sense spending alot of money to change seat location on the e7 heads cause what are you left with in the end?? = craptastic heads.....either put the twisted wedge heads on or build a block capable of using an inline valved head with correct components added for performance

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quote:

ORIGINAL: AdderMk2

im an asshole.... deal with it

(in reply to 86GT 93LX)

Post #: 8

RE: once and for all..e7 heads on a 86 motor! will the ... - 5/24/2008 4:36:12 AM

86GT 93LX

Posts: 2119
Joined: 10/18/2006
Status: offline

i would but my motor has been built as i found out with the flywheel and differant oil pan. my current valves are crap, they leak

quote:

ORIGINAL: mjr46

quote:

ORIGINAL: 86GT 93LX

quote:

ORIGINAL: Joel5.0

quote:

ORIGINAL: 86GT 93LX

i just dont see how its possible unless the heads have been worked for it to vary at all

Not all similar engines are EXACTLY the same...... tolerances in piston to deck + E7 chambers + camshaft + timing set + ...+... reason why you need to check your specific case..... or pay the price of not doing so if they don't clear.

when u get the valves done can they be recessed more? gt40 heads are the same possible deal too right? i would think all stock e6 blocks in mustangs would be closely the same as long as the cam is stock. i geuss the deal is even if they clear absolutely no cam could be used but a stock one? well i might start collecting parts to build a new motor. i got some falcon 302 heads layn around too with adjustable rockers but not sure if they work on a roller motor? are set of trick flows really worth it??

what would be really worth it is switching pistons so you are not limited to such things..there would be no sense spending alot of money to change seat location on the e7 heads cause what are you left with in the end?? = craptastic heads.....either put the twisted wedge heads on or build a block capable of using an inline valved head with correct components added for performance