Should I move to a smaller turbo?
 

Right now I'm running a Precision SC61 and my goal is to get 400 rwhp on pump gas. I have all the supporting hardware to get there, I just need to install the damn stuff. I know the SC61 will get me there, but because it's capable of much so much more I believe I should find something a little smaller. The other option I'm looking at is a GT32 with the external gate. I feel that this turbo can also reach my goal and will be much happier running where I plan on be using it. I will be mainly using this car for 40-140 runs on the highway and some drag racing. What do you guys think?

post up some compressor maps

i think 140 on the highway is faster than even habitual speeders would consider a "good idea".

do you have current dyno runs to show where you make power?

Here's where the SC61 makes power on the stock block (with the base map from FM). I assume power delivery will be similar or slightly better on the built FM motor. I will just be able to push it a lot harder and I only want to rev it to 7500 if possible. I don't have a compressor map for this turbo and I have never been able to find one. Precision doesn't even seem to know. Mike was running this same setup on his stroker motor and put down well over 400 with it. I'm not really limited to anything at this point, but since I will have everything out of the car to swap the engines it will be the ideal time to make changes. I know this turbo will get me there, but I feel I'm leaving a lot on the table. I'm not limiting myself to this turbo or the GT32, if you feel I should be looking elsewhere, let me know.