Hello ! A simple combustion chamber with a small quench accommodating an age old 2 valve layout with a single spark ! ( I wonder what the piston top looks like ? )
Just one channel through the widest portion of the squish area is good enough ! Just keep it narrow and deep as indicated in your drawing / pix and sand the edges down a V bit to give you the comforts ! Like they say ~ One match stick is enough to light up the place ? I am sure you will not hit water how ever deep you go ! See the video for inspiration ~ How to hack 4 valve head http://www.youtube.com/watch?v=Ss7slCT0Vpw!
Looking at the old gasket ? What is the recommended head to piston gap ? 60 + thou gap ? or more ? Skim the head by at least 0.10 thou ~ and make sure the head is ZZ Zero flat on a surface plate after the shave ~ No Rock n Roll ? Sand all the combustion chamber & valve edges down. Check the psi in each of the cylinders before and after. Do a basic emission test too before & after ! Every one is talking about CC ~ Some call it ~ " Carbon Credit " !
Are you doing any other mods ? Wish you can keep it to ~ Just Grooving ? You have a super charger to give you all the VE as you go up the rev range. i wish to hear what other have to say ? sing !!!
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Hello sir! Thanks for the reply. (and for all of your work!)
So you how deep do you suggest grooving? I have never attempted anything like this and have no idea how deep too deep is. I have read 1.5mm to 2 mm somewhere.
So you say that smoothing the top of the groove is a good idea, Correct? It makes sense to me, to avoid hot spots, I just want to be sure I understand. Most of the pics I see here appear to keep the sharp edges.
Here is a picture of a piston head. (not mine, but the same kind)......
I have also had suggestions to eliminate the left groove, (in my drawing) and to point the right hand groove more towards the left (exhaust valve), thinkng this would help create a clockwise swirl in the chamber from the air exiting the 2 quench cuts. Any thoughts?
As for shaving the heads, as you said, I plan on doing atleast a 0.010 to make sure it is completely flat. I planned to groove the head after the mill job to make sure they are not changed by the milling.
Clearance should not be an issue. I have seen people go as much as 0.03 without needing to mill the intake, and as much as 0.05 when they do mill the intake to match.
Stock compression is 8.5:1 I would lke to be around 9.0:1 after the grooves. I can get thinner head gaskets, (0.01 thinner) plus mill of .010 to .020. How much do you think the grooves will change the stock compression ratio?
Sorry for all the new questions! I hope the new info helps! ~Dan
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There is no hard and fast rule ? Neither is there a rule book on grooving ! The displayed pix on the net will give you the ideal locations and dimensions. It all depends on the shape & depth of the combustion chamber in relation to the provided squish area. If you have the ability to build up the squish area out of Argon Arc ~ You can recreate your own " Noah's Ark " and Sail through Storms with all the added compression ! There is enough & more proof on the net displaying one simple channel pointing towards the plug does the trick. Adding compression brings about the hidden potentials of " In-Cylinder Combustion " !
R & D Personal tell me it will cost them Millions to perfect the groove ? They have no idea what the long term effects would be ?? My answer to that was .... You have spent $100's of Billions in the last 100 years trying to perfect the IC Engine from the out sides ~ For once why don't you look at what the outside World has perfected, from the insides with the help of Basic Hand Tools & Common Sense ? Nothing More ! Nothing like trying to find the Optimum limits within the small space, where " Fuel turns into Fire ! ? Do this, while the going is good my friend ! Crude Oils are close to $ 100 / - So is winter ? sing !!!
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