Quote:
Originally Posted by Irace86.2.0
Too much thought IMO. Go small for less lag or quicker power delivery n bigger for more power but with lag. Spend more on a ball bearing for quicker spool. Spend more on a twin scroll turbo and manifold for more efficiency and quicker spools. Spend even more on variable twin scrool turbo to have the small and big turbo effect with a wider and flatter torque curve. Advantages to the latter would be more power at every RPM with less boost needed. Why not just run a small turbo for quick spool but go at high boost for power? Less efficiency means more heat.
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Well with the EFR series turbos, you get the twin scroll with ceramic ball bearings I am nearly there!!
What do you mean by high boost. Is your idea of high 15PSI or 25PSI? When I originally was looking at the full race kit, max I was looking at was 13PSI with the 7163 as you could get about 350-370whp. and with that turbo, quite a few were hitting 13PSI by 3,500RPM. But then I thought to myself do I really need a turbo that big; hence why I began to look at compressor maps.
I am sure the 6258 would be able to get my aim of the 350whp ball park. the turbo is rated for 450 (pretty sure that is at the flywheel so after 15% loss, about 380whp). So I guess that means I would be pushing a lot of boost; well over 20PSI.
With the 7163 at 13PSI, I know what I would need to do; 10:1 CP Carillo Pistons, CP rods, GSC valves, DW65C fuel pump, 700CC Deatschwerks injectors, ACT XT street clutch with lightweight flywheel. By going with the 6258, the majority stays the same, but I am guessing I may need to go to 9:1 pistons?? My main concern with the 6258 is I don't want significant torque drop off. I am yet to see anyone go for the 6258. Most run the 6758 or 7163.