I recently pulled my motor (lsx 376 stroked to a 416) to get it freshened up and looking to drop the D1 and go big turbo. I really want to keep the large cubes but starting to notice it requires an entirely different level of turbo. I want to make between 1000-1200 in full street trim and will drive this truck around to car shows, work, and maybe a short road trip. My goal is basically to run a single digit et at full weight or close to full weight. Should I go back to the 376 and go with the 80 mm snails or should I stay with my cubes and go with a 500 series frame or 90-100+ mm? Thoughts?

 

Buy the 84mm in the for sale section here. I can't use it, otherwise I would buy it lol.

 

too small.

 

You have some option.
The 400+ is gonna require a large T6 with a big exhaust wheel.
Compressor side a billet 84 or larger will do.
Precision has some large cast stuff that can get the job done.

4" down pipe
Maybe Quick spool valve if spool rate was a little slower then you want.

And you'd be golden.

 

I see. Well in that case, get a 100mm+ turbo just to say you have a 100mm+ turbo. It's all the rage.

 

My 82mm does about 1150-1200 on my 402...guess its too small to have fun with :/

 

80 mm flows 120 lb/min.....

 

The trend in turbos is following the same trajectory as LS camshafts. Bigger and bigger then the bubble pops.

 

A turbo that is slightly undersized (from what charts say)
will always be more fun in the street truck then one that is perfectly size or even to large.

 

It has to, otherwise nobody would be able to make any power.