Eddy head question
Thanks for all the input! but does anyone know about how much hp I can expect from switching to the eddy 63 cc closed chambered heads from the 72 cc open chambered heads?
At the currant 8.5 comp u have, switching to a closed chamber might get u 5 hp more from the compression bump of a half a point, if you dialed the quench in good.. 'more comp by virtue' maybe another 8, so 12-15 hp. Now if you accessed the flow of the eddys buy lifting the valve into the .500's where the eddys start to flow better than factory iron...u could see a combined 25-30hp increase.
but what it comes down to is ...what do your factory iron heads flow in comparison to the eddy heads?
If they flow like 340 heads 220-228 cfm, and the eddys ootb flow 240@500, ur looking at a around 15cfm gain for 1400 bucks
In a nutshell, if you go eddy...you'll pick up 10hp from the comp alone and maybe another 15hp from the extra 5-10cfm throughout the low lift range. you could get more if you up the cam lift and get into the .500's.
Basically 1400 bucks for around a 30 hp bolt on, more if u up the cam, port the eddys.
or you could buy the wheels and with the money left over, pull the iron off for a couple bones worth of porting which should get you the same 240's cfm that the eddys flow and another 60-80 bucks to have the iron milled down to 65cc compression bump.
fwiw, high volume oil pumps are not necessary unless the motor is looooose and or modified/drilled oil galleys. see high volume is pumping/compressing harder, when u compress oil u are putting heat into it...the more you compress it, the more heat.....you dont need hotter oil thats viscosity breaks down faster...plus they eat up hp -harder to turn...so u will eat some of that newly acquired hp u paid for.
skip the high volume pump.
