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dome piston with a Vortec head

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dome piston with a Vortec head

Postby Larry Woodfin » Sat Jul 21, 2007 5:33 pm

I really like the small block Chevy Vortec head [original factory castings 062 or 906] and have built several strong running bracket race engines using them. They are expecially suited for mild, auto trans combos because of a broad power curve.

So far, I have only built flat top, flat tapppet, 355 - 360 combos. I usually flat mill the heads about .040 and that usually gives about a 60cc - 61cc chamber.

My question, have any of you experimented with a small dome piston using the Vortec head? Due to the spark plug location I "think" the dome would need to be a simple "bar type dome" down the piston center.

Any experience or comments. Just looking for some added compression, maybe add a point of compression.

Thanks
Larry Woodfin
Larry Woodfin
 

Postby automotive breath » Sat Jul 21, 2007 6:54 pm

Larry,
I have done a few engines with the Vortec heads, all flat tops. Nice port design.

I *think* these pistons would work. I use them with topline/RHS heads.
These are inexpensive forged pistons from Keith Black for 350 w/5.7 rod;
part number KB727. They do make these for other bore, stroke, rod
length combinations.


Image
automotive breath
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Postby Larry Woodfin » Sat Jul 21, 2007 7:47 pm

Breath,

Thanks, looks just like what I need to clear the spark plug boss. A few mins spent rounding the edges would have those ready to go.

Larry Woodfin
Larry Woodfin
 

Postby automotive breath » Sat Jul 21, 2007 8:19 pm

Another thing I have done is to take the old 1/8" dome TRW pistons and mill
the dome where needed to provide clearance. The domes are solid so milling
doesn't do any harm. The TRW's weigh a ton but can take a beating.
automotive breath
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Postby Larry Woodfin » Sat Jul 21, 2007 8:56 pm

Breath

check your PM

Larry Woodfin
Larry Woodfin
 


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