Hello,
I am repairing my 91 GTA L98 350. I want to replace the stock ECM with a FAST XFI, Acell DFI or AEM ECU. FAST XFI system seems to be the easiest. Anyway, I intend to create a coil per cylinder, distributorless crank triggered ignition system.
I need to eliminate the stock distributor as my new custom manifolds and plenum will not allow it.
Correct me if I am wrong PLEASE.
I believe the HEI distributor preforms three functions other than spark distribition:
1. Provides the Tachometer signal ???
2. Drives the oil pump ???
3. Hole in distributor shaft lubricates the rear of the camshaft ???

Problem: If I eliminate the stock HEI Distributor;
1. How do I generate a signal to run the Tachometer ?
2. How do I lubricate the engine properly at any RPM ?
3. Not sure how necessary this is since no distributor gear to lubricate.

Please reply directly to
Firebirdjim@hotmail.com

Need some helpful advice.

Firebirdjim@hotmail.com
Firebirdjim@hotmail.com

 

1. yes
2. yes, you need the lower part of the distributor to drive the oil pump or convert to dry sump.
3. No, it provides oil to the right side lifters and rockers.

You have to take an old distributor and modify it. Remove all electical parts. You can use a lathe to minimize the size where it does not clear the plenum.

The new ignition system probably has a tachometer output you can use.

 

use a distributor drive out of an LT1 (yes, they have one under the manifold even though they don't use a distributor)