seafordguy

Does anyone know the displacement amount consumed/lost by the protrusion in the stock 502 pistons - je700

This is the top style I'm talking about since evidently they made several top styles even under the JE700 stamping

MILD THUNDER

iTrader: (3)

Its a very small dome. Its not much, I wanna say 3 or 4cc positive displacement. Same piston used in GM crate ZZ502, 502HT towing engine, some merc 502's, etc. Its GM part #12533507, just made by JE for General Motors. Typical 502 with 118cc chamber heads, .040 head gasket, usually ends up around 8.75:1 ballpark.

Black Baja

iTrader: (2)

I thought the small domes were 17-19cc

rmbuilder

Seaford,

The JE700 nomenclature is a forging mark, not a volume/part identifier. The dome volume is +4 cc, minus a -3 cc valve relief, yielding a net crown volume of +1 cc.

Bob

Unlimited jd

iTrader: (5)

Yeah what he said^^^^

seafordguy

Well **** Bob, I was trying to find this information out to give to you!!!!!!

I thought I'd call you as a bundle of information and you'd be all impressed and you went and spoiled that..... Haha

Left you a message late afternoon. My crank is in, and I've got the piston in to give you any other measurements you need.

Eric

FIXX

iTrader: (2)

with the carbon on that piston its more like +15cc's lol


http://www.jepistons.com/Catalogs/SR...placement.aspx

seafordguy

Hahaha.

That one was in the set that was trashed

Black Baja

iTrader: (2)

Kind of off topic question. Did the motor that piston came out of have a thermostat in it?

seafordguy

Yes and a bunch of injectors that were WAY out of spec