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Don't tell anyone, all gasket manufacturers are the only ones to really know the real speed secrets of every head. I hear what I BELIEVE you are saying... I only use OEM gaskets when I work the head, because OEM tends to have more consistancy........ I've gotten a bit further since my last post.......

So with it @ the shop to get cleaned, the delicate dance proceeds More to come... :D So now that OST-030 is @ the shop getting its valve job, work on OST-031 begins..... A slightly different angle view on the intake bowls, and chambers... a bit more vertical http://ost.ebeans.ch/albums/userpics/100...

If all else remains the same and assuming the bore of the head gasket is 1mm larger than the cylinder bore then you need a volume of 37cc. I should have had you answer these other responses :) Without checking it.. stroke volume is 3.14x41x41x77=369.5 piston sticks up 3.14x41.41.0.3=1.6 gasket is 3...

Besides the Poncams, my client is using a piston with a 3.2cc dome. He has to check, but believes he has .005" of positive deck - piston slightly ABOVE the blocks surface. He wants to run a squish of .040". What chamber volume does he need for a 11.3 to 1 compression ratio? My clients sai...

4 down......








Next stop valve job and resurface... and then we set chamber volume....




More to come.......

further progress... 3 down 1 to go.... this time the intake view - first short radii... http://ost.ebeans.ch/albums/userpics/10005/normal_intake_short_radius_3_down_1_togo.jpg followed by the view down the ports http://ost.ebeans.ch/albums/userpics/10005/normal_intake_view_3_down_1_togo.jpg The exha...

2 down.... 2 to go.....

Chambers.....




exhaust ports.....




More to come.......

What do you do about bad cam journals and caps? not ignoring you... not quite ready yet to show that part of the process :) Is this a CA customer? 11.3 on 91 octane, better have clean chambers, and management dialed in nicely, my recommendation from experience... I would even worry that improved br...

what's the purpose of that chamfer? any idea why that was machined? for larger valves? It was machned this way because of poor quality control. In my humble opinion - This head should never have been allowed to leave Toyota :!: If you look carefully of the 2 panel showing both sets of chambers, the...

Wow can wait for the end result ;) ;) hmmm...military owner by any chance?...we use those cases for equipment/parts That's a flight case, often used by musicians and such. The latches are very similar to those used in Military cases (non Peli type) as they have a high latch strength and low profile...