how much tuning before ecu needed

[jondee86]

The Apexi filter should help. I put on the filter and intake kit, and
noticed that it pulled harder and smoother at higher revs. But I once
put on a cheap generic tubular exhaust "header" and found it made no
difference. Since then I have changed back to the factory cast iron
header, and it works fine.

Lightweight pulleys and flywheel don't make any power, but they will
improve the response of the engine to the throttle

Cams up to around 260 deg and 8 mm lift will drop in without any
other modifications. They give a nice lift in power with only a small loss
in idle quality. Depending on the grind, exhaust size etc, you may lose
some low rpm performance, while gaining mid and high rpm power.

An aftermarket ECU can give you a modest performance increase on
even a stock engine. Best results will come after you free up the
breathing, raise the compression and feed in some more fuel

When you have full control over fuel and timing, you can tune to take
advantage of your mods. Factor in some quad throttles, and you have
the makings of a serious fun machine. I'm working towards this right
now

Cheers... jondee86