I have a Precision 62/64 Turbo, I was just wondering how bad the turbo lag would be. I am running speedfactories street savage cam which allows the turbo to spool better. Let me know if you guys know anything on this topic. Thanks.

 

A lot more variables to consider. What’s your he purpose of the car?

 

It will be laggy.

Little engine + Big turbo = Laggy

 

Short answer: You'll be at around 5500-6000rpms before that big turbo comes up on boost, it will be super duper laggy.

Longer answer: Precision doesn't post compressor maps so I'm just going to guess but you need at least 10lb/min of air to get the turbo moving into the compressor map. Using an easy approximation of 10lb/min for air for 100hp, a 100hp d16 is going to be at peak power to get it moving which is gonna be around 6000rpms.