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Pittdawg
Dodge Dakota
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2/07/2003
22:36:44
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 Subject: H.O. Heads
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Message:
I know nothing about how exactly the specs in heads interact, i.e. exhaust lift, intake lift, etc. But I do know ideal flowing heads make more power. Would a stock 4.7 benefit from the H.O. heads at all, are there flow differences?
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brianman
Dodge Dakota
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2/08/2003
00:52:47
| RE: H.O. Heads
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Message:
i'm not o sure what if any changes were made to the heads for the h.o. engine. there cant be to big of changes because there is only about a 30 horse difference between the h.o. and regular output. in my mind i think you are better off just doing a little home porting and polishing of the ports and chambers. the heads would have to come off anyway so why not just clean the castings up and save the extra money on something better.
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Joe
Dodge Dakota
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2/08/2003
01:29:14
| RE: H.O. Heads
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Message:
usually on a H.O. engine versus a normal engine the head is about the only change...if you port and polish that head it wouldn't do as good as the H.O.! Mainly because it has different valves and valves spring also. And if you do port and polish that head you need to throw some headers and dual exhaust on it or else it's pointless! Because what's the point of having better flow in the head if the exhaust just gets strangled in the exhaust pipes! I put headers and dual exhaust ONLY on mine and i gained 30 HP on my '97 w/ a 318! So if u do port and polish or get a different head, do some exhaust work too or else it's pointless!
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D
GenIII
2/08/2003
02:44:11
| RE: H.O. Heads
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Message:
www.premierautomotive.net
ported/polished HO heads $1600, good for at
least a 30-40HP gain N/A add a blower and
you'll be screamin
2001 4.7 CC
shaved
dropped
FOR SALE $16,500
pointurd@hotmail.com
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Ian
Dodge Dakota
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2/08/2003
03:12:19
| RE: H.O. Heads
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I know about the premier-automive heads, but I can probably get the factory H.O.'s for cheaper, my question is what kind of horsepower gain can I expect from the regular H.o. heads?
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TexasTodd
Dodge Dakota
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2/08/2003
13:35:27
| RE: H.O. Heads
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The pistons are also different, different compression ratio.
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Demon Dakota
DakotaEnthusiast
2/08/2003
13:48:51
| RE: H.O. Heads
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Message:
Crank is different. Forged vs. cast. Getting the crank and doing a swap would be a good way to beef up the engine. Then get the custom lite weight pistons and rods (off KRC website), and you're in business. Adding the heads might be possible (dunno, they have knock sensors and other gadgetry). Just buy the whole 4.7L engine and ECU, then do the swap :)
K&N Drop in AF
True Dual exhaust and removed third cat
HO Cams & HO Intake
Modified TB
Autolite 3923 Plugs
TPS @ .76 VDC
IAT Adjuster Mod
14.52@94.2 MPH at Silver Dollar Raceway
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