186 rebuild, Oracle advice
#26
Posted 28 February 2021 - 08:46 PM
Yeah Dave my thinking on the crank pn but at least says they are both the earlier steel billet I suppose.
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#27
Posted 01 March 2021 - 08:26 AM
#28
Posted 01 March 2021 - 11:32 AM
Cam and lifter packages don't seem real cheap........
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#29
Posted 02 March 2021 - 07:39 PM
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#30
Posted 02 March 2021 - 08:17 PM
#31
Posted 02 March 2021 - 08:37 PM
They will balance as well and now I’m thinking I should give them a flywheel and pressure plate.
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#32
Posted 03 March 2021 - 08:45 PM
Dropped disassembled 179 at Lonsdale engines for them to measure up. New pistons advised so if any boring required at all will probably go out to 3 5/8”for standard 186 pistons. Plenty of meat in the walls as the castings are from the same moulds I believe. Block will be decked.
They will balance as well and now I’m thinking I should give them a flywheel and pressure plate.
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Hi, 11 years back, my 179 needed boring oversize, std.186 was all that was available then. Maybe the same now ??
#33
Posted 03 March 2021 - 09:45 PM
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#34
Posted 03 March 2021 - 10:08 PM
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#35
Posted 04 March 2021 - 07:01 AM
#36
Posted 04 March 2021 - 07:08 AM
Definitely give them your flywheel and pressure plate.
I wouldn't be too concerned about using the hi comp head.
I doubt your slugs will be at zero deck and with a thicker head gasket and even with only a small cam I think you'll be fine.
#37
Posted 04 March 2021 - 08:05 AM
^^That advice about the head is what I meant Clay, others out there will have valuable feedback for you about what you can get away with. I’d decide though if you are going to do it and get Crow to make you a cam to suit so you don’t have too much dynamic compression.
#38
Posted 04 March 2021 - 08:06 AM
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#39
Posted 04 March 2021 - 08:08 AM
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#40
Posted 05 March 2021 - 04:27 PM
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#41
Posted 05 March 2021 - 04:36 PM
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#42
Posted 05 March 2021 - 05:22 PM
Doesn't sound like it's too wild with duration of 214/214 @50 but it does have a good amount of lift at .429/.429" at the valves.
Ensure the valve springs in that 202 cyl head can handle that amount of lift without coil bind.
#43
Posted 05 March 2021 - 06:34 PM
Thinking to reuse crank gear with a new ally cam gear. The crank gears I have are original and only run with fibre gear. Should be fine?
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#44
Posted 05 March 2021 - 07:27 PM
I was actually thinking the opposite. The short-ish @50 duration and high lift is going to open and close the valves a poofteenth faster than a cam with more @50 duration for the same amount of lift.
You shouldn't need roller rockers but I personally prefer at least having adjustable rockers over the non adjustable fare.
#45
Posted 05 March 2021 - 07:27 PM
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#46
Posted 05 March 2021 - 07:51 PM
Exits 1 3/8"
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#47
Posted 05 March 2021 - 08:09 PM
The springs bind at 18mm.
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#48
Posted 05 March 2021 - 08:15 PM
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#49
Posted 05 March 2021 - 08:40 PM
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#50
Posted 05 March 2021 - 08:51 PM
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