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Difference Between Regular and HO 4.7


 
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Suzuki
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Joined: 09 Aug 2004
Location: Woodbury, Minnesota

PostPosted: Mon Aug 09, 2004 1:37 pm    Post subject: Difference Between Regular and HO 4.7 Reply with quote

Sorry about the newbee question. I just found this site.
Last week I finally got back into Jeeps again by getting my wife a Laredo.
I've had 2 Sports and a Grand in the past but got side tracked with a WRX for two years. I pretty much rushed into the purchase because of the fabulous deal I got on an 04 through a friend and the fact I like Jeep so well I wasn't even worried about the specs. The funny thing is all she wanted was heated leather seats and outside temp guage, both of which I found on a Laredo instead of spending more on a Limited.
I got the regular power-tech V8 with 3.73 rear and it seems awfully snappy. More than I remember my 5.2 was in the 98 although I loved that engine dearly. The HO must be awesome. I would like a brief description of the differnce between the 2 V8's. That would probably answer my next question which is whether or not I can simply add parts to my power-tech to achieve HO status.
If this is not possible what are the most popular add ons for increased power? Appreciate the info. Thanks.
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Tue Aug 10, 2004 9:12 am    Post subject: Reply with quote

I am pretty sure that the only difference is the intake and cam.. But I could be wrong.. a little searching is in order...

Carl
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Tue Aug 10, 2004 9:12 am    Post subject: Reply with quote

That was quick...

http://www.dodgeboy.net/durango/47ho/index.htm?http://www.dodgeboy.net/durango/47ho/47ho_frame.htm

Found this article on swapping a standard 4.7 to HO

Hope that helps...

Carl
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Suzuki
Member


Joined: 09 Aug 2004
Location: Woodbury, Minnesota

PostPosted: Tue Aug 10, 2004 9:25 am    Post subject: Reply with quote

Thank you very much.
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Code3TJ
Hacker
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Joined: 01 Jan 2004
Location: Uzbekistan

PostPosted: Fri Aug 13, 2004 10:07 pm    Post subject: Reply with quote

Here's a little more info:
1. Block - Detonation sensor bosses in the valley
2. Camshaft - custom profile lobes (designed for increased performance)
3. Connecting rods - modified, with floating wrist pins vs pressed-fit pins in standard V8
4. Crankshaft - forged steel vs cast iron in standard V8
5. Crankshaft damper - unique to H.O.
6. Cylinder heads - different shaped combustion chambers (for improved airflow). The letters "H.O." are cast on the front end of the heads.
7. Exhaust tip - chrome (2002 models only, decontented for 2003 models. Available only as a one-piece assembly with muffler)
8. Fuel injectors - higher flow (+3.3 lb/hr)
9. Intake manifold - modified (shorter runners)
10. Intake - low-restriction intake system (different resonator, air filter, air filter hose and housing)
11. Knock sensors - two, stereo
12. Main bearings - tri-metal (vs bi-metal in standard V8, designed specifically for the HO engine)
13. PCM calibration - unique programming
14. Pistons - dome shaped for increased compression ratio
15. Spark plugs - platinum tipped
16. Valves - unique exhaust valves same lift as standard V8
17. Valve springs - upgraded valve springs (intake & exhaust. Larger diameter wire and more coils)
http://www.links4jeeps.com/links/1592
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