ecu chips

[thedaggsy]

i see why its so popular now

[Arnie]

I'll be with gem and the rest on mapping BUT it also depends on your budget and requirements. If you follow so called "stages" and check it on a rolling road for det you should be fine. Some common sense is required though (no big boost etc). You'd see power gains but not so big as it would be custom mapped.

I'm saying this from personal experience and Horsham Development (H-Dev, Jez) chips work well and I have dyno graphs from CA18 run on Surrey Rolling Road (reputable dyno) to prove it. My car had stage 1 and then stage 2 fitted, all working great with good fuelling and power/torque.
CA18det with s14 tubby, stage 2 chip etc, made 266bhp at 1 bar and that's with leaking fmic. It ran like that for 30k miles and withstand a lot of abuse too

Saying that, I got for myself some cheap custom NOZ chip from ebay to match z32, 560 injectors and TD05 turbo. I'll have AFR, EGT gauges and I'll make some det cans for testing plus rolling road test, so not recommended for starters.