DSMTalk Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum banner

Decent size turbo for a 2.3L stroker 4G63?

4K views 8 replies 8 participants last post by  greyforestgst  
#1 ·
I'm thinking of rebuilding a spare engine I have to a 2.3L stroker. The standard compression is 8.8:1, but any compression is available.

I want to use the car primarily for open track days, some autocross, and once or twice a year, drag racing. So the main concern is low spool rather than top end. Would a small/big 16G be enough for this engine? Or should I think more along the lines of a 20G, or possibly an AGP L2R or FP Green?
 
#4 ·
the l1r will give you less lag, so in autox etc may be a better choice.
 
#5 ·
What would happen if I were to run the stock 14B, say at 17-18 psi with an upgraded IC (along with injectors/pump) on the stroked engine? Is is possible to overspool it? Or would I just get full boost around 2,000 RPM, and then it would run out of steam around 5-6K?
 
#6 ·
Look at a compressor map for whatever turbo you are looking at. Increasing displacement will move you more to the right on a map, at a given pressure. So for a stroker motor, you want a wheel that flows a good bit of air at a given pressure ratio. 14b and 16g arent good for this ;)

Talk to a few different vendors, they know most of the maps by heart and have real world experience with them. But you can look at some maps to get a general idea. You want a more horizontal map, IMO.