Quote:
Originally Posted by arthur93
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.
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Size is relative so fair question. Most SC and turbo kits start at about half bar (7-8 psi) on a system that has an upgraded, medium-sized turbo over most oem turbos. Seems like oem like to use smaller turbos with higher boost levels like 1-1.5 bar or 14-21psi. This is probably to avoid lag, and they don't boost higher because higher boost levels could be either unattainable with a small turbo or dangerous without e85 as a knock suppressant or unreliable because of excess heat from inefficiency. Before e85, on the street, 20+psi was high boost. Now guys are running 50psi, but to me, on pump gas, 20psi is high.
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