60mm or 76mm inlet pipeline

[twin turbo]

When or why "upgrade"to 76mm intercooler and throttlebody? Advantages, disadvantages?

[mikedaf2]

60MM from turbo to inter-cooler and 76mm from inter-cooler to throttle. Not sure the exact reasons but trust me it works better!. I think its something to do with the air expansion/contraction and velocity!

[twin turbo]

Thanx, Yes have been thinking about that. Just know that on "several" 2jz driftcars here, the one that was on 2.5inch pipeline was the most responsive of them all. The others Are now higher power so they needed bigger, but thats 3inch now, and they Are close to 1000bhp and over 1000nm on 3litre engines. So unsure how, why and when i get advantages from increase sice on my 2.0 engine