FYI the VW/Audi turbo's are KKK/K-03, which are similar in A/R and trim to the Garrett T-03.

Small twin turbo's are better than a single large turbo for street applications as they spool up faster, therefore less lag.

As well, engines built for turbocharged use from the factory typically have greatly reduced static compression ratios. That is the biggest reason for a feeling of lag, as the engine will be putting out less power with the low compression ratio (before the boost)

If an engine is kept with a decent static compression ratio (8.5/1) and run with lower boost levels (.5 to .7 bar), intercooled with something like twin K-03/T-03 there will not be any drastic lag.

Think of it this way - a 20V turbo Audi 1.8 engine has put out between 150hp and 225hp through it's life to date. The lag on those engines is gone by 1200 rpm. And they run lower than 8.5/1 static compression ratio. With twin turbos on a 3.3L v-6, you would be giving the eqilivant of 1.65L of displacement to each turbo. Assuming using the same A/R and trim you can expect similar rpm range for boost production. Realise there are other varibles than just displacement...

Truthfully for slow crawling they won't be the best thing. But for sand dunes, mud bogging, towing, and road driving it would be a lot of power.

Both turbo's and superchargers are highly reliable...the quote about twice the things to go wrong - it's physically true, but the idea is flawed. I guess for reliability we should all drive 1-cylinder/1-speed/1-tire cars! :rolleyes: