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post #1 of 29 (permalink) Old 01-09-2004, 04:31 PM Thread Starter
 
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4.2L Swap Question

I searched, and never saw any mention of this.

What year EEC is compatible with the 4.2? Also... what kind of transmission is required? I saw PJ has a 96, so Im assuming he has the 4r70w... Im curious if it will work with an 89 AOD.
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post #2 of 29 (permalink) Old 01-09-2004, 05:27 PM
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Actually PJ has a 94 but it does have the 4r70w.

Yes the 4.2 will fit on your AOD all you have to do is use the AOD flex plate.

Your EEC is compatible with the 4.2. You just may want a performance chip and dyno tune to get the air/fuel mixture correct.

-Thomas

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post #3 of 29 (permalink) Old 01-09-2004, 09:16 PM Thread Starter
 
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SWEET.

Ill haffa dig into this sommor.
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post #4 of 29 (permalink) Old 01-10-2004, 01:32 AM Thread Starter
 
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Whilst sitting on the pooper, I thought of a question I should have asked earlier.

Is the 3.8 Flywheel compatible with the 4.2?
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post #5 of 29 (permalink) Old 01-10-2004, 02:05 AM
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yes

1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner
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post #6 of 29 (permalink) Old 01-10-2004, 07:00 PM Thread Starter
 
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Anybody else concur or disagree? Not doggin ya Thomas, I just like second opinions and all.
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post #7 of 29 (permalink) Old 01-11-2004, 12:29 AM
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Quote:
Originally posted by brokenmachines_e2
Anybody else concur or disagree? Not doggin ya Thomas, I just like second opinions and all.
No doggin taken.

1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner
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post #8 of 29 (permalink) Old 01-11-2004, 02:33 PM
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Yeah Ill back Thomas itll work

94 SC with Built 4r70W and 408W
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post #9 of 29 (permalink) Old 01-11-2004, 04:01 PM
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Justin Agee (Justang) at 3.8 Mustang has a built 4.2 in his Stang and makes 233 rwhp and 252 tq.

You cannot use your 89 ECM if it is not MASS Air. You will have to swap in a later MASS air unit.
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post #10 of 29 (permalink) Old 01-11-2004, 05:37 PM
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Is he swapping the intakes and all or just the block if its just the block I would think he would be fine with his current ecm as long as he uses everything from his car but I know what your sayin I was just backing thomas on what he said about the flex plate

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post #11 of 29 (permalink) Old 01-11-2004, 06:03 PM
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hehe, I just thought of something. If flex were to hold a dinner plate, you could call it a "Flex plate." Okay so I'm bored.

Can a MAP car have it's air/fuel corrected by a tune? I don't think so. You'd have to convert to MAF.

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1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner

Last edited by Thomas; 01-11-2004 at 07:12 PM.
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post #12 of 29 (permalink) Old 01-11-2004, 06:41 PM
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What is a MASS car? I thought he meant a MAF car, namely MASS air flow.

Isn't there just 2 basic types of monitering, maf and speed density or something like that. I think the latter was on my TC.




Julian

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post #13 of 29 (permalink) Old 01-11-2004, 06:48 PM
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yup, sorry. typo. MAP car.

1988 Notch Mustang: - 438W, direct port n2o, t56
2003 SVT Focus: - SCT X3 tuner

Last edited by Thomas; 01-11-2004 at 07:13 PM.
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post #14 of 29 (permalink) Old 01-12-2004, 08:27 PM
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The difference is that cars that do not have an MAF meter have Speed Density ECM's. No one can or does mod these ECM's to account for mods. Speed Density systems can only adjust to about %15 increase in flow which is almost no mods. So they can only be retained if the owner wishes to only add bolt ons.

This is why you need to convert to MASS air from a later car (any one that has a MAF near the air box). The chips from these ECM's can be modded to account for airflow mods such as ported heads/intakes, cams, stroker kits etc.

Ford installed the MASS air ECM's from 91 on in the T-Birds.
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post #15 of 29 (permalink) Old 01-12-2004, 08:35 PM
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If you are going to convert to a 4.2 in your 89, use the ECM, wiring, MAF etc. from the donor and then just have the ECM tuned to your mods.
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post #16 of 29 (permalink) Old 01-15-2004, 08:43 PM
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wow... stroking

1. Use forged internals.

2. If you don't want to use forged internals, see #1.
post #17 of 29 (permalink) Old 01-15-2004, 10:06 PM
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Quote:
Originally posted by krusher
wow... stroking

1. Use forged internals.

2. If you don't want to use forged internals, see #1.

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post #18 of 29 (permalink) Old 01-16-2004, 09:37 AM
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While there is a small amount of yuks brought on by your comments krusher, there are no forged internals for a 4.2.
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post #19 of 29 (permalink) Old 01-16-2004, 11:20 AM
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Quote:
Originally posted by Flex
While there is a small amount of yuks brought on by your comments krusher, there are no forged internals for a 4.2.
well... before you stick your foot in your mouth... please visit www.supersixmotorsports.com and read the catalog... then please switch to the page for a complete FORGED 4.3L stroker kit for the 3.8L engine... then you can correct yourself and realize that I do know what I'm talking about.
post #20 of 29 (permalink) Old 01-16-2004, 12:26 PM
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Before you stick your foot in your mouth where does it say forged crank anywhere in that catalog? Be specific please I've read it twice and it looks to me like it says Ford crank and all of Ford's are cast. If you want a forged 4.2 crank you pay more than even ssx charges.

No particular reason to go forged just for a stroker. It might last a little longer but you won't make enough hp to bother the cast Ford crank without forced induction. Anyone wants a 4.2 "stroker" should read PJs article first then this http://www.v6power.net/forum/viewtopic.php?t=16229 unless you have plenty of cash then head on over to ssx.

Last edited by doodaa; 01-16-2004 at 12:33 PM.
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post #21 of 29 (permalink) Old 01-16-2004, 02:41 PM
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I wasn't using that as a source for everything... I realize that Super Six doesn't sell Forged cranks... I was mearly giving Mr. Flex a quick source that I had available to me to help him realize that his post was incorrect.

I suppose I could look up a source for a 4.2 forged crank... but its apparant by your post you already know that they do exist.

Quote:
If you want a forged 4.2 crank you pay more than even ssx charges.
EDIT: and I'm sure that everyone who's done major modifications like a stroke or a blow or juicy juice knows about the bug that you get... once you drop a few seconds off your time you're hooked... why not spend the extra money right now so that it doesn't cost you more in the long run?

EDIT 2: If you don't want to spend the extra money for a forged crank, then don't... but if you don't want to have to go back into the engine once you buy your vortech blower or your 150 shot of N2O please... get the forged rods and pistons

Last edited by krusher; 01-16-2004 at 02:47 PM.
post #22 of 29 (permalink) Old 01-16-2004, 04:19 PM
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Flex's post is technically correct. You said forged internals and that is generally taken to mean crank, rods and pistons. If anyone is running a forged 4.2L crank he/she hasn't posted up about or advertised it on the 'net where any one of 1000 people in the 'Bird/Mustang/F150 communities that want one would've seen it.

There have been several that have inquired (to say the least) and a few have gone so far as to check the cost of having one made with a manufacturer - Pete or Talleywacker over at v6p if memory serves - and they bailed because they got astronomical numbers for one off pieces. I don't deny that they can't exist, anything can exist with enough money thrown at it but it would certainly appear that even the highest hp guys running 4.2s are still running stock, cast Ford cranks even if they're suffering from the "bug". Therefore the ability to run "forged internals" in a 4.2 does not yet exist unless you've got a big, no huge, wallet. Therefor it ain't near as simple as


"wow... stroking

1. Use forged internals.

2. If you don't want to use forged internals, see #1."

Last edited by doodaa; 01-16-2004 at 04:26 PM.
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post #23 of 29 (permalink) Old 01-17-2004, 02:15 AM
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Quote:
Originally posted by doodaa
There have been several that have inquired (to say the least) and a few have gone so far as to check the cost of having one made with a manufacturer - Pete or Talleywacker over at v6p if memory serves - and they bailed because they got astronomical numbers for one off pieces. I don't deny that they can't exist, anything can exist with enough money thrown at it but it would certainly appear that even the highest hp guys running 4.2s are still running stock, cast Ford cranks even if they're suffering from the "bug". Therefore the ability to run "forged internals" in a 4.2 does not yet exist unless you've got a big, no huge, wallet. Therefor it ain't near as simple as
There has been one, if not more forged 4.2 cranks made. I know of once instance where someone had it amde for their sc. The cost was 2000 dollars.

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post #24 of 29 (permalink) Old 01-17-2004, 12:12 PM
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Krusher,
Doodaa has expressed my meaning exactly.

Generally when you advise someone to go forged in a stroker, you are referrring to the crank as forged pistons are not only not required, but can be a detriment to longevity in a motor that is not SC'd or going to run nitrous.

There is no forged crank available for the 4.2 that is not a one off custom made piece = Texas sized dollars.

There are combos available that use the forged SC crank with a custom offset grind/rods/pistons. Morana makes them or used to.

So my post is quite correct.
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post #25 of 29 (permalink) Old 01-24-2004, 08:06 PM
 
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will the front cover off a 3.8l with the oil filter and distributer fit on a 98 4.2l block in a 94 t-bird
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post #26 of 29 (permalink) Old 01-25-2004, 08:10 PM
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The distributor will fit right in place of the camshaft sensor on the 4.2L, no need to swap the cover
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post #27 of 29 (permalink) Old 01-25-2004, 11:02 PM
 
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Smile

one other question that i was thinking is the 4.2l the same thing as the 3.8l just diff bore and stroke
will the 3.8l cam work in the 4.2l
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post #28 of 29 (permalink) Old 01-26-2004, 03:14 AM
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Same bore (if not it's VERY close) and different stroke.

the 3.8L cam isn't as good as the 4.2L cam but it'll work in the 4.2L.

-Thomas

1988 Notch Mustang: - 438W, direct port n2o, t56
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post #29 of 29 (permalink) Old 01-31-2004, 02:43 AM
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The 4.2 is basically the same as the 3.8, but it has the newer style pistons, etc., like the 96+ 3.8s. So, it has a little more in common with the later 3.8s than it does with the 89-95s.

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