Cliff's Quadrajet Parts and Rebuild Kits

General Category => Lobby => Topic started by: lightning boy on February 07, 2023, 01:58:58 PM

Title: HEI module
Post by: lightning boy on February 07, 2023, 01:58:58 PM

Does anyone know the best module for a 4pin HEI? Brand and Part

Title: Re: HEI module
Post by: Cliff Ruggles on February 08, 2023, 06:34:36 AM

OEM "990" modules are the best.  I've seen a few show up on Ebay NOS.  They are light years better than anything else out there.  If I needed one I'd dig it out of any old distributor vs buying anything new or aftermarket.....FWIW

Title: Re: HEI module
Post by: lightning boy on February 09, 2023, 04:39:21 AM

Thanks Cliff.

Title: Re: HEI module
Post by: Cliff Ruggles on February 10, 2023, 05:07:22 AM

To date I've tested just about every "upgrade" for the stock HEI module.  Even one with rev-limiting dip switches on it. 

Some worked fine, others did not.  Without exception, sooner or later every single aftermarket module bit the dust and I had to go back to my 990 module.

On the dyno my "stock" HEI with 990 module made just a tad more power in a back to back test than an MSD billet distributor with a 6AL box!......