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505cui - Stroker question:

I was reading that many people are happy with their 440source-stroker kits.
I’ve two of these sets in the focus:

One with dished pistons and the flat version.
Since I’m looking for the lighter one, the flat would be my first choice.
Does anyone know how much more grams the dished version has? They do not have this data on their page.
Secondly the alu heads I have are around 75cc. This will pump the cr to 12.3:1 with the flats.
Which is a ‘lil too much for a street-friendly ride I think. I’d be more happy with cr around 11:1 to 11.5:1

Should I get the dished version with 10.9:1 or taking the flats including thicker (0.60 or 0.80) gaskets ? Or do I run with the thicker gaskets in other problems?

thanks

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My 518 C.I. 400 stroker has a set of Ross custom 22 CC dish(complete dish, not reverse domes) that where originally set up at -.025 deck height with 84 CC open chamber iron heads and a Fel Pro .042 thick head gasket, that ended up making 9.25 to 1 comp. ratio. I switched heads two years later to a set of Eddy RPM(closed chambers) with 84.cc,I also switched the crankshaft from 4.25 stroke to 4.300 to make the motor a zero deck with Eddy RPM heads, I later switched those heads to a set of Indy SR with 75 CC chambers, ended up with 10.78 to 1 comp. with a .054 thick Cometic head gasket. It is barely pump gas friendly using Oregon non ethanol premium If I had to do it over I would start out with a reverse dome piston so I could get a decent quinch area in the top of the cylinders, not a complete dish piston

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so what cam converter and gears?? also what is the intended use?

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so what cam converter and gears?? also what is the intended use?

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@dodgem,

compcams suggested a hydraulic cam for maintanance reasons.
They offered: Thumpr™, 283THR7
Car will be 4 speed with 3,54 gears
street use, maybe once/twice seeing the strip.
slightly rough idle accepted

question: Is there an hp-advantage zero-decking vs. -0.015 "in the hole" ?

Best,
smoke

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Being a street car I would run the dish piston at
0 deck, .039 gasket... that'll give you the quench
and your comp that you want... it would end up saving
you money(if you go with Felpro gaskets)... then if
you want(and probably should) you can advance the
cam for better low end power... which closes the
intake valve sooner on the piston stroke.... remember
that the static compression is just a math number and
the dynamic is when comp really starts so the CAM is
the big part

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Thanks for all of your input.

Yes the heads are indy 440 EZ opened to mw-size. They should have
75cc. But i'll check to be sure.

It seems that all of you are valueing the quench (this means going with heavier dished pistons) much higher than the weight advance of the flats (and using thicker gaskets).
Is there no way to combine flat pistons and quench in this stroker build? Machining the pistons? What costs to expect roughly?

________________________________
regards

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so what cam converter and gears?? also what is the intended use?

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@dodgem,

compcams suggested a hydraulic cam for maintanance reasons.
They offered: Thumpr™, 283THR7
Car will be 4 speed with 3,54 gears
street use, maybe once/twice seeing the strip.
slightly rough idle accepted

question: Is there an hp-advantage zero-decking vs. -0.015 "in the hole" ?

Best,
smoke

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well o deck with a .039 gasket gives .039 quench -.015 gives a quench of .054 not quite as good.

that is a mild cam definately go dish!