Can I please ask your opinion on the port job of my heads?

[Matt Tobias]

Hi there, here are the heads I just picked up.  They are 040 castings with new guides and new 40x35 valves with mild port work, the bowls/seats are blended nicely.  I'm thinking they need a little more work above the guide, on the roof.  What do you experienced guys think? This engine is going in a fully caged Baja with fiberglass front end and fenders.  It will also be utilizing a 091 tranny with the 4.57 R/P and 30x9.5 tires.  What I'm after is torque with a nice powerband.  
Thanks in advance!
here are my engine specs-
2276
stock rods
dual springs
Norris 330S cam- .495 lift with 1.4s and 246* at .050.  
8.5:1
1.5" header
44 IDF's

[Erlend / bug66]

Try to keep up the air speed! Nice, fast (not to big) ports produce good torque if the rest of the engine is up to it 

Is that a little bump in the lower left port?

Get some good angles on the valve seat.

[Matt Tobias]

Try to keep up the air speed! Nice, fast (not to big) ports produce good torque if the rest of the engine is up to it 

Is that a little bump in the lower left port?

Get some good angles on the valve seat.

Thanks, the bump is the underside of the spring perch.  When I get the heads opened for 94's I'm going to have Competition Engineering check the valve job and do whatever is necessary.

[Torben Alstrup]

What is port inlet Dai ?

T

[Matt Tobias]

Hi T the inlet port is 31.75mm tall by 30mm wide.  The exhaust port is 31.75mm.

[fish]

inlet ports loog good, you could straighten out the intake charge and have the slight oval ports make a v in the direction of the spark plugs, don't take too much off the roof and do not touch the "bump" also keep a swirl to the port.

lets see the chamber and ex port.

2cents

[Matt Tobias]

Thank for all the replies so far, I do appreciate it.  Here is the exhaust port and the chamber, which is semi-hemi.


 I plan on modifying the semi-hemi into more of an open chamber, after being intrigued by the success Rick Mortensen and Joel Mohr have been having with open chamber heads. 
Here are Rick M's heads

[modnrod]

I'm intrigued by the shape of your chamber opposite the plug, the way the shape curls in towards the valves, rather than jus a straight line across the bore.
These "040" castings, are they OEM from somewhere, aftermarket?
I'm sure they're common, but I haven't seen them before, and they look interesting.

[rick m]

Matt,

I will post the heads I am redoing for a friends bus motor. We are finishing up the head mods and case mods right now for better oiling. Went to the same open chamber design I did on my street heads.

Rick M

[Matt Tobias]

Matt,

I will post the heads I am redoing for a friends bus motor. We are finishing up the head mods and case mods right now for better oiling. Went to the same open chamber design I did on my street heads.

Rick M

Thank you, I look forward to seeing those pics!