Tag: C4

Remove the Late L98 “Frisbee”

In front of the water pump pulley on 1988 and later L98s resides a rather large 10lb steel disk, lovingly refered to as the “frisbee”. There has been much debate on the Forum about it’s purpose and the benefits/risks of removing it. During a Q & A session at Corvettes at Carlisle 2001, I posed […] More »

  Comments | By - April 21, 2010

VAT Key Codes and Values

Someone posted this a while back in C4 tech. Corvette VATS Key Codes and Associated resistance Codes in OHMS Pellet Resistance Code Ohms 1 – 402 2 – 523 3 – 681 4 – 887 5 – 1130 6 – 1470 7 – 1870 8 – 2370 9 – 3010 10 – 3740 11 – […] More »

  Comments | By - April 21, 2010

Additional to Alternator

The later alternators 1993? and up do not use the retaining plate with the 3 screw but instead the bearing is held in by staking the aluminium. On these alternators a puller has to be used with extreme care so as not to crack the front housing.

  Comments | By - April 21, 2010

C4 Ramps Under $45

by John Richman How do you get under a C4 to change oil & filter? Conventional ramps are too steep and perilously slip. I made a set in the Fall in a few nights for under $45. Start with 10 clean 2x6x8 pine boards. Mark 27\” in from each end and draw a line from […] More »

  Comments | By - April 21, 2010

Five Cheap Mods That Add Up to 70 HP to a C4

1) First, relocate the the intake air temperature sensor to the air clearer duct. The heat load where it is located on a stock C4 gives the ECM (Electronic Control Module) a false reading and the ECM responds by cutting back on the fuel/air mixture to a leaner value than is actually required. Mid-America sells […] More »

  Comments | By - April 21, 2010

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