Non-proprietary stroker assembly thread :)
#1
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Non-proprietary stroker assembly thread :)
I think I'd gotten too diffuse with the last stroker thread, so I figured I'd refocus on the engine and give an update.
Greg and I spent New Year's eve day assembling the heads, after a marathon of measuring combustion chambers, spring heights, calculating coil bind and valve shims, and lapping valve seats. I did the head assembly (run, don't walk, to your local Snap-On truck and buy yourself a CF-700 hydraulic valve spring compressor- holy crap what a cool tool....) while Greg did some customizing of the 968 head gaskets, adding some holes here and plugging some holes there.
Some of the plugging requires handmade blockoffs for head passages, Greg made each of these by hand over the course of the afternoon. They are pure art!
We finished up by torquing down the head bolts. Quite the workout but it's surprising how much harder it is to UNdo old head bolts that have been stretched than it is to torque and stretch new ones!
Anyhoo, Greg also folded in his new windage tray design- these don't block the oil return paths in the stock oil pan. They do require the use of the 3/8's oil pan spacer. 20+ welds on each holding the screen in, they're not going anywhere...
Greg and I spent New Year's eve day assembling the heads, after a marathon of measuring combustion chambers, spring heights, calculating coil bind and valve shims, and lapping valve seats. I did the head assembly (run, don't walk, to your local Snap-On truck and buy yourself a CF-700 hydraulic valve spring compressor- holy crap what a cool tool....) while Greg did some customizing of the 968 head gaskets, adding some holes here and plugging some holes there.
Some of the plugging requires handmade blockoffs for head passages, Greg made each of these by hand over the course of the afternoon. They are pure art!
We finished up by torquing down the head bolts. Quite the workout but it's surprising how much harder it is to UNdo old head bolts that have been stretched than it is to torque and stretch new ones!
Anyhoo, Greg also folded in his new windage tray design- these don't block the oil return paths in the stock oil pan. They do require the use of the 3/8's oil pan spacer. 20+ welds on each holding the screen in, they're not going anywhere...
#4
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It looks like it belongs on the Millennium Falcon
#5
Official Bay Area Patriot
Fuse 24 Assassin
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Fuse 24 Assassin
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Very impressive Rob!
I have a stroker crankshaft in my dreams for my car, but have no clue on what's needed to build a stock S4 engine with just a stroker crank to achieve maximum endurance and reliability. That or an RMT
I have a stroker crankshaft in my dreams for my car, but have no clue on what's needed to build a stock S4 engine with just a stroker crank to achieve maximum endurance and reliability. That or an RMT
#7
Team Owner
very nice craftsmanship there fellas, good luck with the build
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#12
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i cant wait to see and read more about this!
We're doing the cam and timing setup/install in 2 weeks and then intake and ancillaries after that. After my March grant deadlines, I'm looking forward to having another engine install get-together some Saturday or Sunday.
#13
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I see the plug holes on the heads. are those 968 heads? then, how do you use 968 gaskets and and plug a gasket????????
They're 928 heads (4R's IIRC), both the head passages and the 968 headgaskets get modified to fit. I spent some time tonight staring at the coolant flow diagram in the '85 Service Tech Info book on Jim's CD and I have to confess that I still don't understand the mods.
#14
Looks Fantastic Rob ! & yes it's old world true craftsmen/artist' like Greg Brown that keep
our old cars running and actually more competitive than the newer more expensive ones..
our old cars running and actually more competitive than the newer more expensive ones..
#15
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If you haven't made the pilgrimage to his shop, you really should.