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csimp3
10-19-2005, 08:24 PM
hey, wheres a good place to have my heads ported and polished?, has anyone had this done, and how is the power gain?, is it noticeable, and is it worth it, alos how much did it cost?thanks
igmif
10-19-2005, 08:59 PM
If your even just average at mechanical stuff, you could do it yourself. Air tools like a mini die grinder are great. But you could even accompilsh the job with a dremmel tool and some hand files. There's tons of info on this site and on the web. I did my own and it was a piece of cake. I all I did was a minor port widening and smoothed things out, nothing drastic at all, and the increase in performance was about double that of when I removed the choke.
csimp3
10-19-2005, 09:11 PM
sweet do you know where i find this info?
400exMO
10-20-2005, 05:47 AM
http://www.exriders.com/vbb/search.php
csimp3
10-20-2005, 10:48 AM
ahh, yes, forgot about that, thank you
hotrodbelair
10-20-2005, 02:45 PM
i heard somewheres on here that if u do the port and polish that u should only do the exhaust.
ommkevin
10-20-2005, 02:50 PM
what does a port and polish do

do u need to do it if you bore over
underpowered
10-20-2005, 03:10 PM
port and polishing smooths up and opens up the intake and exhaust ports for better and more effient flow of the exhaust gasses and air fuel mixture. it is not required for big bore application but greatly improves performance.
ride_red666
10-20-2005, 05:01 PM
is it worth the money to do it with an almost stock motor?
underpowered
10-20-2005, 06:21 PM
a port an polish is woth it anytime, there are some mods that i would do before the port job, but it would definitally be worth it. i would suggest a good exhaust, cam, and piston before the port and polish, or do it all at once while you have the motor apart.
csimp3
10-20-2005, 06:37 PM
yeah, when and if i port and polish my heads, im gonna put in a stage 1 hot cam, ill check the piston, but will probably leave it stock
ommkevin
10-20-2005, 07:40 PM
whats with the hot cams is 1 the 2 and 2 the 3 then whats the 1
hotrodbelair
10-20-2005, 07:51 PM
stage 1 is for stock bore maybe even a 416 correct me if im wrong. the new stage 2 and the old stage 2 now stage 3 is for bigger bores like 426 and 440s ect. the new stage 2 gives u more mid to top with out losing any lowend and stage 3 gives more mid to top but u lose a little lowend.
nosliw
10-20-2005, 08:28 PM
polish the exhaust, not the intake fyi
Quad Dude
10-21-2005, 07:20 PM
why shouldnt you do the intake????
igmif
10-21-2005, 07:27 PM
Originally posted by nosliw
polish the exhaust, not the intake fyi
Yeah ... why not the intake??? I did mine. Have you ever looked into your EX head? There's plenty room for improvement.
2001300exguy
10-21-2005, 08:17 PM
velocity porting;) click (http://mototuneusa.com/)
nosliw
10-21-2005, 08:53 PM
you can enlarge it, but don't want to smooth (polish) it. the ruff cast helps create turbulance and mix up the air and fuel better. i've done plently of cylinder heads on V8s, and assume the same principles apply to these small engines.
bubba power
10-22-2005, 12:46 PM
how can anybody port their head without a flowbench reading ? you are just guessing unless you use a flow bench.:huh