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Old 10-05-2010, 12:04 AM
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non HO to HO swap?

Hi all ive got ? i just got a 2000WJ with a blown none HO 4.7 motor my ? is what is involved in doing the HO swap? .. I already have a 03 4.7 HO motor i just need to know whats involved .....

thanks
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Old 10-05-2010, 12:36 AM
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Re: non HO to HO swap?

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Originally Posted by badassgc View Post
Hi all ive got ? i just got a 2000WJ with a blown none HO 4.7 motor my ? is what is involved in doing the HO swap? .. I already have a 03 4.7 HO motor i just need to know whats involved .....

thanks
Well I believe the 4.7L HO has Knock sensors that automatically control the engines timing as its designed to run on 91 octane. If you put a cheaper grade in, knock sensors pick that up and re-calibrate for it. if you were to swap it you would have to always ensure you're running atleast 91 octane fuel or swap over the ECU if you got that as well.

If you want to use the HO parts to upgrade your stock motor, swap over the cams and the intake and the intake manifold (i think?) and get a tune and that should make it pretty similar to the HO 4.7L.

Again I'm not entirely sure on all this, but it should give you a good starting point. If you could clarify, do you have the ECU (computer) for the new high output engine?
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Old 10-05-2010, 12:56 AM
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Re: non HO to HO swap?

Thanks ... I know about the knock Sen and the ecu but is there an add on for the Harness that I can do with out changing the whole harness out ? the motor came out of GC so its all the same I geuss .. Oh and I know that the intake for the air box is also different but ill probably just put a Cai on it
I did an add on my 88 mustang it didn't have mass air that just Consisted adding some wires and changing the ecu so i was wondering if its the same deal ...
again thanks ..joe
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Old 10-05-2010, 08:58 AM
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Re: non HO to HO swap?

There is only 1 plug and it has 2 knock sensors attatched to it. All you would have to do is get the HO knock sensors and install it in the valley where there is 2 bosses that it bolts too.
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Old 10-05-2010, 02:45 PM
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Re: non HO to HO swap?

I know about the two Sen the 03 HO motor has them I just need to know what I need to add to what I have to make it work my 2000 isn't an HO just reg 4.7 ... And my other ? Is what about the 16tooth wheel..is the HO different ?

Thanks joe

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There is only 1 plug and it has 2 knock sensors attatched to it. All you would have to do is get the HO knock sensors and install it in the valley where there is 2 bosses that it bolts too.
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Old 10-05-2010, 03:14 PM
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Re: non HO to HO swap?

My 2004 4.7HO is a 16 tooth. What makes the difference is a 16 tooth operates with the JTEC PCM where the 32 tooth is for the NGC PCM.

The PCM won't care if you run one standard knock sensor or the 2 "Stereo" knock sensors from the 4.7HO. I don't think it's needed on the standard 4.7 since the compression is not as high as the 4.7HO, unless you are doing modifications to it that would make it nessecary.
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Old 10-05-2010, 03:55 PM
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Re: non HO to HO swap?

Got it.... So should I just get my ecu re flashed? ... I do plan on doings things to it that's why I want to do it right the first time and be done with it ya know


Quote:
Originally Posted by scjeep4.7HO View Post
My 2004 4.7HO is a 16 tooth. What makes the difference is a 16 tooth operates with the JTEC PCM where the 32 tooth is for the NGC PCM.

The PCM won't care if you run one standard knock sensor or the 2 "Stereo" knock sensors from the 4.7HO. I don't think it's needed on the standard 4.7 since the compression is not as high as the 4.7HO, unless you are doing modifications to it that would make it nessecary.
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Old 10-06-2010, 11:36 AM
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Re: non HO to HO swap?

Ive always felt like doing the HO swap. let us know how it turns out.
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Old 10-06-2010, 12:29 PM
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Re: non HO to HO swap?

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Originally Posted by tomcat2040 View Post
Ive always felt like doing the HO swap.



Gotta swap your HO from time to time.





I was thinking about doing the same, but I am just going to go with the HO cams and lifters instead.
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Old 10-09-2010, 03:04 AM
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Re: non HO to HO swap?

bump
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Old 10-09-2010, 10:29 AM
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Re: non HO to HO swap?

As long as your PCM is for the same tooth count as the replacement engine then it will run it just fine. There are only 2 versions. One is an earlier version 99-up to some 04's and run off of the JTEC PCM and the newer is the NGC PCM for some 02's and up. The JTEC is a 3 plug PCM with separate TCM and the NGC is a PCM and TCM all in one and has 4 plugs. older version runs off a 16 tooth count tone wheel where the newer one runs off a 32 tooth tone wheel. If both are older versions then your PCM will run it just fine. There are other differences when you talk about the two motors but that is for another day.
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Old 10-09-2010, 11:08 AM
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Re: non HO to HO swap?

Thank you.. Now what about the knock sen the HO has two of them ..is wire harness different? or can I just change that part of the harness?

Thanks
TE=scjeep4.7HO;281723]As long as your PCM is for the same tooth count as the replacement engine then it will run it just fine. There are only 2 versions. One is an earlier version 99-up to some 04's and run off of the JTEC PCM and the newer is the NGC PCM for some 02's and up. The JTEC is a 3 plug PCM with separate TCM and the NGC is a PCM and TCM all in one and has 4 plugs. older version runs off a 16 tooth count tone wheel where the newer one runs off a 32 tooth tone wheel. If both are older versions then your PCM will run it just fine. There are other differences when you talk about the two motors but that is for another day.[/QUOTE]
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