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Posted

did a duner for a guy last week and figured I throw up the numbers. wasn't going all out on this one as this was one of my "budget port" jobs with the exception of adding +1 valves.

 

DPATV budget porting w/+1s - no decking/combustion chamber work

97mm cp 13:1

early hrc

42.5 fcr

dasa intake/exhaust

revmax box (junk)

pump gas with a stock clutch

 

before runs were HRC kit with same rev box and k/n

miguelbeforeafter.thumb.jpg.2e2478348ca0ac8861faef7ae8705a66.jpg

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

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Posted
Looks good Matt. Thanks for posting up. What gains do you usually see when going with bigger valves?

Just a little more HP and I should be set.

 

 

Posted
all depends really. on this build with an hrc cam, it probably only picked up another 1 hp but we went with +1s because he plans to run a 208 sometime in the future. +1s show more with bigger cams and more displacement.

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

Posted
i would say 62/36 with a 208, decking and a 44fcr on 110. with a dyna and e85 it might push 65 if I set the squish tight

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

Posted
how much do you weigh rob? LOL

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

Posted
this guy weighs about 170 so i don't think it will have quite the load but we will see. i told him he could mix 50/50 if he wants to be on the safe side but should be fine for pump. what cam were you running with 12.5:1?

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

Posted
Way to go! I have a very similar build with the same bore, cam, compression, and carb but with mystery porting and an FCI intake. Mine only makes 50/35, goes to show how much of an effect different porting has.

2004 TRX480R

30+ HP

Posted
Thanks! Yes, as they say "the power is in the head". I could remedy your issue for a nominal fee ;)

Mobile Dyno - Motor Builds - Service - Porting

Dynomite Performance ATV

Phoenix, AZ

623-255-7096

Posted
Don't tempt me!! Lol if I had more time to ride the first thing I put money into would be a better head, until then I'm ok with just doing small things. Speaking of which, what's your opinion on FCI vs. Dasa intake for the 04-05 bikes?

2004 TRX480R

30+ HP

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