INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

to mill or not to mill...

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Old 03-04-2008, 09:27 AM
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I am getting ready to do the cam swap I have a GT2-5 a 220/220 .563/.563 but I know this has been talked about but with varing results.
Should I mill and do a mild clean up on my stock heads. This comes down to a few hunderd dollars. The milling and port work will be pretty cheap but then I will need head gaskets and bolts and...
I will be pulling the motor because of some other things I need to take care of
I know there are gains but to what degree.
This is a 5.3 and my baseline dyno numbers were 282 RWHP and 304 RWTQ so they were pretty good for stock (tuned) Since these are kindof on the high end for stock I didnt know if my gains would be minimal...
Just trying to get my options lined up.
Thanks
Dave
Old 03-04-2008, 10:18 AM
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What do you want out of your truck?? do you want it to just be quicker or daily drivable, or what?? Heads are a PITB and I only did mine again because I went with some really good heads. I did the milled stock heads, and P&P'd them myself before and couldn't tell any difference.
Old 03-04-2008, 11:50 AM
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Joshaua thanks I know you got some tremendous gains with your swap, I dont have the cash to do that right now so I thought this might be an alternative, but like I anticipated it does not seem like there is much to gain. To do it right I would end up with larger valves and a better port job but then I have spent some cash.
Maybe others will chime in.
As far as what I want...this is not my DD being in my 68, but I do and will drive it quite a bit, just always looking for more power...
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