Recent content by Mopardoctor

I believe a 318 combo can make nearly as many horsepower as a 340/360 cui, but not as much torque. These heads is bought/made for under 400$ with new valves, and i`m just showing how much is left of chamber, when milling cylinder heads 0.05 inch/1.3 mm for more compression, before milling 68 cc...

My bottom cut 46 degress is 2.5 mm wide. Polish the sharp edge from 60 degress. Throat under seat is 39,24mm in diameter/82.5% of 1.88 valve. The grey line on seat is from diamond paste.

After milling Mopar 318 open chamber 0.05 inch, there is only 0.062 inch left of chamber.

Cutting my mold up in smallest cross section, finding my high speed area in my heads, valve curtain is calculated with XE 262 H lift. Can also see how the port is twisting into chamber for swirl. Intake gasket : 14.08 cm2 Pushrod pinch : 11.02 cm2 Cross section : 9.05 cm2 Valve throat ...

Mold of intake port, got the whole short turn and some of skijump before short turn/ smallest cross section, speeding up air velocity into turn,hopefely having wave pressure there and out to Venturi under valve.

Here is my open chamber Casting nr. 4027163

Also with 1.88/1.6 valve ?, and did you fell the difference?, 302 heads on 360 cui will give a full point in compression. I read on a site that i should´nt go over 83% bolw of valve on intake (velocity vs. flow), or i would lose button end torque, 85-90% bolw is for top end power only they said.

Made in a "trompet form" under valve to create a venturia effect and turn air round the seat.

Can see all my old pictures is gone here, so here is before and after, seat is blended in by hand with a small radius under 46 degrees cut.

Gave it just a little 15 degrees cut.

My cylinder heads were just laying on the shelter, so i gave it a little valveseat cut on 15 degrees both intake and exhaust, and fine grade polish valve lapping.

There is more pictures on my site in Denmark. Thanks for all the attention and fine words. http://www.bilgalleri.dk/fotoalbum/tuningprojekter/169913-portning_af_topstykker_

Will make a dyno on the wheels before and after with same cam(org. cam), just to see what gains there is with heads only, then i will put in a XE 262 H. The exhaust is 3 inch dual delta flow 50, Headman Headers, intake Edelbrock Preformer, Holly 1850 600cfm. Will port macht the intake to the...

Intake valves now have a 32 degrees backcut 0.8 mm wide (0.031 inch), the valves are from Enginetech.

The chambers is now at 56 cc volume with 1.88/1.6 valves.