420a head

[BLACKpsiECLIPSE]

anyone have photos of a 420a head cut in half and measurements of everything? I need to see the inside of the stupid ####ing thing before I throw it on the mill table... Going to weld the water ports shut, Mill out the entire upper water jacket, fill it with weld and build some new ports with good angles on the valves, intake and exhaust side... but i need to see inside the bi*** first.

 

[silvreclips]

Why would you want to do this? Plenty of people have used this head and made plenty of power, you better be seeing some kickass gains for all of the work your going to put into this head.

 

[BLACKpsiECLIPSE]

well im going for upper 800+ hp so i need it to flow. everything will be done on a flow table as well so i will post numbers once i get there.

 

[BLACKpsiECLIPSE]

So.. nobody has anything?...... Has anyone on here done this? Idk how the people running bigger turbos expect to make power with out chopping out those tiny ports...?

 

[96TurboGS]

You know, there is a reason why DCR used the 420a head over the SRT-4 head on the red sled....What you're doing isn't necessary. I'm sure there near the 1000hp mark.

800hp+ is going to come at a stupid cost, so get your wallet out.

 

[BLACKpsiECLIPSE]

not really. All machine work is being done in in house. I dont see you reason behind that. any one who can weld very good. Has good knowledge of running a mill, has a flow bench and can port can do it.

 

[all_motor_mike]

not really. All machine work is being done in in house. I dont see you reason behind that. any one who can weld very good. Has good knowledge of running a mill, has a flow bench and can port can do it.

r i g h t....................... yeah boss all the crap u said in the first post isnt necessary......... with stock valves u can get over 300 cfm on the intake side and 240 cfm on the exhaust side (if u know what your doing) then theres more flow waiting with a little more porting and bigger valves. there is no reason what so ever to weld in the water jackets and all that shit u said above. i have flow bench sheets for various port jobs of mine and cut aways but i suggest u go buy a crap head and see whats in there for yourself sir. and dcr runs the 420a head so he can run the turbo up front........ but the exhaust side does flow a bit more then the srt's though.

AMM

 

[BLACKpsiECLIPSE]

Yeah.. with what cams...how many inches of water and what valve lift and is that open port or with a radius on the edge.. too many variable that aren't listing...

 

[all_motor_mike]

Yeah.. with what cams...how many inches of water and what valve lift and is that open port or with a radius on the edge.. too many variable that aren't listing...

why do u need cams? its at 28" h20 and .500" lift on a SF 600 with clay radius inlet, now get a head and cut it up.


AMM