05 TRX 480 pump gasser

[Mattonln]

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

 

[mailman]

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

 

[Mattonln]

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.

 

[whoppes27]

Great numbers Matt for a relatively mild build! What do you think it would do with more head work, 208, and bigger carb?

 

[Mattonln]

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

 

[want2bfast]

my 12.5 was showing signs of detonation.. Hmmmm

 

[Mattonln]

how much do you weigh rob? LOL

 

[want2bfast]

220lbs

 

[whoppes27]

I need to get my bike back on the dyno! Matt roll that dyno up here to MI, it is mobile after all

 

[Mattonln]

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?

 

[want2bfast]

Hc3....................

 

[ghott]

Great power Matt! Especially for a milder build...there is plenty left in it.

 

[Mattonln]

Thanks guys

 

[Dr. Beardface]

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.

 

[Mattonln]

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

 

[Dr. Beardface]

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?

 

[OTMTRX]

According to a few of our more experienced here... FCI for 06+. 04/05 Dasa with ring.