the stroked 7m...again. possibly some new info?

[87hilux7mge]

some more info and calculations to input here. ive tried to research the best i can and provide the most accurate measurements.

i calc'd the two assemblies total length:

stock:....................................... stroked:
stroke: 3.583"/91mm................. stroke: 3.838"/97.5mm
rod L: 5.984"/151.89mm............. rod L: 5.853"/148.659mm
comp H: 1.299"/32.764mm......... comp H: 1.299"/32.764mm

so, divide stroke in half, add rod and piston compression height, and we get thus:

stock: 9.0745"/230.503mm........ stroked: 9.0715"/230.404mm

so a difference of .0030"/.099mm. id say thats acceptable, especially if a shaved block comes into play.

now if i can only find a way to get bearings, revised bushings and somehow increase the thickness of the journal end, id have a cheap solution to a "more effective" stroker for the 7m.

i spoke to the machine shops around here, and none of them were confident about getting such undersized bearings, or custom making smaller bushings for the wrist pin bushings.

if i could get some 5.85" rod blanks, then id be free to machine them as i see fit, and could possibly work it to use factory bearings and bushings, as well as solve the thickness issue so i can avoid rod slap.

the only other problem i see at this point, is the relatively low R/S ratio, especially for what is considered a short rod setup. 1.6:1 is sposed to be the lowest acceptable for a short rod setup, and side loading, ring seal, rod angle and piston slap could become an issue. any thoughts??

if anyone has a line on a place that would do the machine work in the WA area, or where i can get rod blanks, chime in!