4mill port

[GNR101]

hey

i have a agro/trail port on my stock stroke shee would there be any probs running a spacer plate for a 4 mill?

also if i wasnt goin to run a plate is it just a matter of dropping the ports 2 mill?

 

i live in australia.. aint many 4 mill builders to get the good info off..

thanks

Dave

[AKheathen]

hey

i have a agro/trail port on my stock stroke shee would there be any probs running a spacer plate for a 4 mill?

also if i wasnt goin to run a plate is it just a matter of dropping the ports 2 mill?

 

i live in australia.. aint many 4 mill builders to get the good info off..

thanks

Dave

well... since you already have it ported, and i'm not sure what an argo port is, you should talk to the guy who did the porting. if he doesn't have experience porting for 4 mill, then get the specs and talk to a builder who does, like fast. it's more about port timing and clearance. the transfer and exhaust timings need to be on the right ratio from each-other. and the extra 2mm of upward stroke needs to be relieved by cutting the domes/chambers, or spacing it upwards. if you use the spacer, then the timings will both be increased, and if you clearance the chambers, the timings will be decreased. the ports do need to be dropped on the bottom to open the restriction, but an experienced builder can work the ports to yeild the appropriate power and efficiency

[278]

AK already covered this for you, but let me some it up in other words. Dont do a a spacer plate thats the cheap way, get a cool head and get some stroker cut domes for it. Im assuming you meant aggressive trail port, you'll have to get the dimensions on the ports to be able to tell if you can port it for a 4mil. and there is more to it then just droping the ports. What I'd do is call a builder that is experienced with this stuff Jeff at F.A.S.T. and Kevin at Herr Juggs Racing are good joices, my personal preference and who I had do my 4mil set up is Brandon at Wildcard Racing, his number is in my sig. but all 3 are great choices and know what it takes to make a strong 4mil motor