guess maybe rocket 120+ octane??????? Could i be the only lt1 running compression like this? it did pop and bang a little on 110 vp

 

haha on the nuclear fuel, and yeah ill have something accurate to measure with, so the alu. where it starts to turn flat i can take a little off? how about the lumps around the spark plug, good idea bad idea? sides between the valves and the edge of the chamber?

 

I would stay on the exhaust valve side of the lump and try to grind the same contour as is there now and blend it in.

 

It never ceases to amaze me.

All of these numbers and no data to work from.

T/A Racer,
What exactly are you building? You mention stock bore size, so are you just refreshing or are you attempting to build a stroker without a bore/hone job.

BTW, I pulled build logs for an el cheapo bracket racer I built a few years ago just to satiate my own curiousity. Seems I had 714 passes on a set of KB hypereutectic pistons before they were replaced due to pin bore elongation. El cheapo ran very consistent 9.7's NA, cutting 60's in the low 1.3 range for whatever that's worth to ya.

To me it says the KB's aint all that bad when you're trying to save some money. The amount you save could be put into the heads.

-Mindgame

 

Disregard the .050" + 15. That's only for a stout solid roller grind. Most hydro cams add roughly 24 to the .050, or you can use this equation:
Advertised duration(.006") divided by 2 + ICL - 180 = IVC You don't have to add anything to this number, just plug it in the calculator.

 

awesome, o and for mindgame im going with this
30 overbore along with

# New STD/STD Eagle Cast Steel Crankshaft (3.75" stroke)
# New 5140 Steel "SIR" Lightweight Connecting Rods
# KB hypereutectic pistons (-7cc flat top) & piston pins
# Premium plasma moly piston ring set
# Clevite 77 Rod and Main Bearing set
# Clevite 77 Cam bearings
# Melling std volume oil pump
# Arp 400CID main stud kit
# already have 1.6rr and EX612 springs along with hardened PR
# cc305
# going to port my own heads and open the cumbustion chambers a couple cc for compression issues
# 160 thermostat for detonation issues
# MadZ28 tune