estimated HP gain 1.76 from 1.72 intake diameter ?

[sil]

just curious, i want to buy a pair of 3100 heads ect.. and was wondering if its worth going up a notch to the 3400/ 2000+ 3100

[Doubt_Incarnate]

i dont think your gonna notice a difference. i'll guess 3hp at peak.

[sil]

thanks... just wha ti wanted to hear lol :P

[eliteweapons]

I increased the intake valve size in my heads form 1.715 to 1.8 to help them flow a bit better, and increased the exhaust to 1.5 from the 1.427 that it was. But I definitely reccomend the intake change to the 3400. with bowl porting extensive guide reshaping and ferrea valves it flowed 205 cfm at 540 lift and 197.3 at 450 lift. the stock head flowed 186.3 at 515 and 178.8 at 429 lift.

[sil]

lol holy thats impressive gains.
if i were to go that route i would want to do it as a long project over winter, slowly working on the heads in my apartment driving my niebours crazy BZzZzzzzzzzz

the porting i could do myself but, what did it cost you to machine and put in new valve seats ? and which valves are you refering to, do you have alink to them ?

[eliteweapons]

they are ferrea racing valves. www.ferrea.com