250 head porting

[Anonymous]

CAn a 250 be ported much?
By cutting off the intake manafold and inlarging the ports how much cfm do you think I could get in there.








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I am thinking an edlebrock 500 cfm 4 barrel, 10.5:1 comp, 208D cam 114 lobe center .450 lift stock 1.5 rockers, custom intake with carb sitting 8" away from the head, hooker headers, pertronix ingniton.

 

[Anonymous]

how much volumetric efficiency could occour in a 250 with a short cam 1000-4000 rpm 204 Duturation, 112 lobe center .465 lift wiith 1.5 rockers, hooker headers, hacked off intake and ported to the max ports?


I could drill and tap studs in the head for a custom intake..

would 500 cfm be overkill at low revs?

 

[Anonymous]

another question what is the highest compression I can run on a 250 with 1.6 rockers?

 

[ASMART]

The big question is how to make the custom intake and how it is mounted.

 

[Anonymous]

1.Hack off exterior intake and exaust.

2.port out all intake and exaust ports to the max safe.

3.Dril and tap studs in appropiate locations, between cylinders 1 and 2, 3 and 4, 5 and 6.

4.make a face plate that fits up to the head, with 6 tubes made 2" thick each.

5.wield at ends of cylinders 3,4 a 4" wide by 2" tall square box which will start to slope down to the ends of the head where box is 2" by 2".[/img]