Polished combustion need opinion
#4
I have done a bit more polishing and they look pretty good now.
I just bought the head porting book by David Vizard, and there is a section in there about porting these heads.
There is a pic showing what the chamber should look like and the spark plug boss is completly rounded off, almost so much where it is not even detected.
Should I do this?
I just bought the head porting book by David Vizard, and there is a section in there about porting these heads.
There is a pic showing what the chamber should look like and the spark plug boss is completly rounded off, almost so much where it is not even detected.
Should I do this?
#5
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Car: 1989 Formula Ws6
Engine: 305 tpi
Transmission: 5speed
Axle/Gears: 3.23
i was told that you could reshape it but not completely remove it. its suppose to help with mix of the air and fuel
#6
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Stick to reshaping it. I completely removed it, but I have seen some nice reshaping of that spot. If I had to do it again, I'd reshape it.
Did you do anything to help unshroud the valves? Hard to tell but doesnt look like it. Also you should work on blending the seat although finding good information on how exactly that should be done may prove difficult.
Did you do anything to help unshroud the valves? Hard to tell but doesnt look like it. Also you should work on blending the seat although finding good information on how exactly that should be done may prove difficult.
#7
Your right I haven't unshrouded the valves yet I need to go buy the head gaskets.
What are some good ones? I am going to be running nitrous too.
I am starting to just round off the boss and make everything a lot smoother.
Madmax
could you maybe draw something in paint or something to explain your ideas on reshaping and seat blending?
Thanks for the input guys.
What are some good ones? I am going to be running nitrous too.
I am starting to just round off the boss and make everything a lot smoother.
Madmax
could you maybe draw something in paint or something to explain your ideas on reshaping and seat blending?
Thanks for the input guys.
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#21
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Car: 1989 Formula Ws6
Engine: 305 tpi
Transmission: 5speed
Axle/Gears: 3.23
Originally posted by jonarotz
The mass above the spark plug hole is the spark plug boss. In my earlier posts you can see what it did look like. I reshaped it to get more swirl. If you remove it all together you will increase the chamber size which will lower your comp. ratio.
The mass above the spark plug hole is the spark plug boss. In my earlier posts you can see what it did look like. I reshaped it to get more swirl. If you remove it all together you will increase the chamber size which will lower your comp. ratio.
#24
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First set was from before then. Its the gaskets that are the problem, same failure for me and other people using them.
The stainless ring around the combustion chamber pulled away from the gasket, into the combustion chamber on the front and rearmost areas of both sides.
The stainless ring around the combustion chamber pulled away from the gasket, into the combustion chamber on the front and rearmost areas of both sides.
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Car: 92 Form, 91 Z28, 89 GTA, 86 Z28
Engine: BP383 vortech, BP383, 5.7 TPI, LG4
Transmission: 4L60e, 700R4, 700R4..
Axle/Gears: 3.27, 2.73
Jonarotz, which intake manifold will you use with the 1206 intake gasket? Stock?
#28
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Originally posted by jonarotz
I am thinking about the Holley Stealth ram.
I am thinking about the Holley Stealth ram.
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