Michael Zosa

Hello all. Recently building this motor from my old one, and I have raised the compression to 11:5:1, have ported block and heads, and .020 over (96mm) bore. Since you have to break in the engine for the first 500-1000 miles, would tuning it after be fine and could the ECU handle the changes of internals without a tune? I know the dyno really stresses the car out, and I was just wondering if it’d be safer to break it in first.
TLDR: With a raised compression of 11.5:1 and 96mm bore, can the ECU still drive and run the car without damaging the engine till it breaks in and can go on the dyno to be tuned? Thanks !

travlee

iTrader: (8)

dont double post, gets you nowhere fast

https://my350z.com/forum/forced-indu...hout-tune.html

**edit, make that a triple post

https://my350z.com/forum/tuning/6195...-break-in.html

M-train

iTrader: (3)

My engine is that compression, and ran fine. I used 93 octane gasoline, of course, but the knock sensor should keep things from getting out of control.

Heck, my wife even ran it on 87 octane before. The engine ran fine, but the knock sensor had the timing retarded so much that you could feel the loss of power.