Thread: Tuning a Turbo
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RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
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Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,528
The dyno can give you a lot of useful information. Along with AFRs you will also see where the turbo spools and where power drops off.
You have nothing to lose and everything to gain. Knowlege is power. If your engine is stockish you can limit the pull to 6000rpm which is very safe.

There is a lot of talk about AFRs, adjustable WURS, digi-WURs and EFI. All that is fine if you wish to extract the absolute last ounce of power and efficiency out of the fuel system. For the majority of folks this is simply not necessary.
Verifying that the system, cold, warm and boost pressures are within spec will get you to a level of efficiency acceptable to Porsche. This can be done by simply replacing a worn out WUR with a rebuilt unit, no adjustment needed.
Thirty years ago when folks took their new 930 to the shop for a tune-up replacing the WUR was on the mechanic's tune-up list and is found in the factory manual. It is a known wear item.
So you have less labor intensive options should you need them ...
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 08-26-2008, 08:15 AM
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