SRowells Diablo 1.8 - Jenvey 45s & OMEX600

[Niall]

Probably missed it but what's the advantage of the wideband on a petrol? I thought you had to keep pretty close to lambda 1 all the time?

Having a wideband on a perv is mainly used for mapping and monitoring. A Narrowband can only tell you that its over/under lambda 1 but not by how much which is no use when tuning as you don't always want to be at Lambda 1.

14.7:1 is perfect for emissions and is the most efficient mixture for burning all the fuel
12.8:1 is the optimum mixture for maximum power.

You can also go lean but only under light throttle for fuel saving purposes. Ideally on a mapped car like this, you don't really want to be seeing over 15:1 unless in DFCO of course. If your booting it or even just pushing on a bit, you want to be dropping down towards 12.8:1. Even at 14.7:1 at full throttle, your pushing you're luck slightly.
You will mainly have a Wideband to monitor this as with a modified engine, you're pushing it past what it was designed for so your fail safes are much narrower of a standard engine..



Plus it looks cool :p