It will have a 82mm 9:1 CPR Carrillo Pistons(probably a bit less due to HKS 1,8mm HG), Spool Rods, fully machined crankshaft with crank collar extended (since I can't find any other option, already tried Nitto, Spool, etc and no one want to make it
) and etc..Anyway, it will be a 2209cc engine, aka 2.2L. I'm still unsure about what turbo should I get since I want at least 400rwkw (around 530rwhp) and decent spool time. Iv done a couple of calculations based on studies and the technical school I attended and I found a website with a very cool, but yet precise, turbo map calculator. > squirrelpf.com/turbocalc/
I'v found some footage of a RB20 running a GT3076R and putting down around 400rwhp and the dyno results shows that the calculator is pretty precise. But since my engine will be a 2.2L, it would spool a good +300rpm earlier.
I have here a couple of maps I got from Squirrel calc. I'd only like to have a couple of advice about witch turbo would be the best choice for Good Power + Good Spool Time + Reliability of the Turbo.
FYI I couldn't find any map for Precision turbos online, and puts them out of my options since I don't want to invest in a turbo that I have no idea how it will react. I'v found several times in forums that their map are similar to their Garrett "brother" turbos, but that didn't convinced me.
The specs for BSFC I'v done the calc myself. Press loss on Intercooler should be less than 2psi since I'll be using a Treadstone TR1245 Intercooler. Peak power is based on my own dyno run with my actual setup. I made a bit over 326whp @6400 rpm.
GT3076R
Garrett seems to be a nice match but at higher boost levels it seems to not be able to delivery the proper amount of air flow with a "safe" compressor wheel speeds.
Turbonetics T61
This turbo seems to be a bit laggy compared to the GT3076R. But it looks like it would give me a sooner spool time to achieve full boost.
BorgWarner S200
Looks like a decent match, not BB tho, but I don't know and I can't find much info about BorgWarner turbos and if they are reliable for street usage, and the calc doesn't specify witch trim or witch specific turbo that map came from.
I used the spool times to be more realistic and I expect it to be more "laggyer" in real life conditions. I just don't want a 800whp monster that doesn't bite until close to redline, and it is only a little RB20... I want usable and good powerband to have fun in drift events and highway.
All I want to know is how would the turbo react when its pushed out of its compressor map range and if its gonna do any damage to it (besides chocking/blowing hot air), and if possible, a suggestion on witch one should be better and witch one would you get or any other option I could look after.
My budget for the turbo is around $1500 US Dollars.
Thanks for you attention and time!
Sorry for any english mistakes or confusing statements, I'm not from the US (But I live in Orlando) and I'm still learning.
Brazil FTW!