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Clevite 77
Dodge Dakota
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3/21/2002
16:31:45
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 Subject: 4.7L heads
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Has anyone thought about, or has had their heads milled. The stock compression is about 9:1, isn't it, well with some higher octane I'm sure it'll be ok if it were in the higher 9's lower 10's. and if so how much power gain do you think you'd get?
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4wDakota
GenIII
 
3/21/2002
17:26:36
| RE: 4.7L heads
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Someone correct me if I'm wrong but i believe their is little to mill on those heads to keep them in spec. To raise the compresion on a 4.7 you need to swap pistons. Remember overhead cam, don't want slack in your timing chain do you!
Corey
98 CC 4x4, 5.2 Auto 3.55LSD
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CW
GenIII
3/21/2002
19:20:26
|  RE: 4.7L heads
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The problem is you can only take something like .006" or .007" off. Doesn't add up to much.
2001 4.7 5sp RC 3.92 LSD
Click on avatar for mods
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Clevite 77
Dodge Dakota
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3/22/2002
09:12:38
| RE: 4.7L heads
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Damn that really sux!
how do they expect us to go faster?
thanks for the info guys
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CW
GenIII
3/22/2002
14:32:13
| RE: 4.7L heads
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High compression pistons.
2001 4.7 5sp RC 3.92 LSD
Click on avatar for mods
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fot80
Dodge Dakota
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3/25/2002
17:10:51
|  RE: 4.7L heads
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I saw how krc offers porting on the heads for the 4.7. What is this and does it help out performance much?
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Horbedarn
*GenIII*
3/25/2002
22:06:09
| RE: 4.7L heads
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Hughes engines is coming out with heads in a couple of months. They haven't given me any specs yet.
2000, CC, SLT, 4x4, 4.7, 3.55, Auto
MBRP Dual Exhaust Cat-Back, JBA Headers, 72mm TB, 4" Z-Tube
3923's, 180 T-Stat, IAT Adjuster
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Jeffster
Dodge Dakota
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3/26/2002
12:50:56
| RE: 4.7L heads
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Wow looks like things are really moving along with 4.7 mod's.
I went and looked at a ASP pulley but my cost up here in Canada was $590.00?? (comes with new harmonic balancer)so I passed on that. Need to figure out what to do with my PCM. Mailing to Kenne-Belle in the states is not an option.
How do you expect to get these things to go faster?? Ya you could go high comp pistons or forced air in witch case you wouldn't want to go to high on the compression.
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