Thread: Turbo/Cam combo
View Single Post
RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 13,525
Garage
You don't need the fuel head mod until the engine goes past the 350whp level. It will do nothing for you but waste gas on a moderately modded engine. It is always a good idea to verify your A/F ratios throughout the range and adjust if necessary.

Don't dismiss SC cams so easily. Combined with the right turbo and tuning they are still one of the best cams available for a street 930. I know of back-to-back testing using SC, SC330, Web, 964, and ANDIAL cams on the same engine. The SC cams won the best driveability/power compromise with 400whp and 1.0bar @2600rpm.
The best turbo? On that same test it was the K27S, again 1.0bar @ 2600rpm with 375whp.

My stock waste gate has Zerro boost creep. It jumps to 0.7bar and sticks like glue. Header design plays into this. The stock Euro exchangers use a very nice angle off the main pipe to the W/G branch. Aftermarket headers often compromise that angle and it becomes a "T" when it should be a "y" or "Y".
__________________
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 11-02-2007, 08:28 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)