Changing to a non-ESC distributer? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my 85 gmc · 01-27-2003, 05:22 PM

I was reading an article in Swervin Ervin's website titled "changing to a non-ESC distributer at the bottom of this article it tells how to bypass the ESC part of the ESC distributer.

Has anyone tried this modification?

My truck has a 305 LE9 engine and I plan to change the camshaft and intake this winter and don't know if I want the computer changing the timing advances on my truck.

The reason I'am asking about this modification along with a recurve of the current dist seems cheaper and can be reversed if spark knock is noticed, since a new non-ESC dist is at least $200 and might not work on this engine.

Thanks Rob

Also I always run 92 octane gasoline.

ElGracho · 01-27-2003, 05:27 PM

Quote:

Originally posted by my 85 gmc
since a new non-ESC dist is at least $200 and might not work on this engine.

I've seen some non ESC distributors available for around $120 brand new (US $) in Summit, Jegs and the like. A used HEI can be bought from a wrecking yard and rebuilt for less. Why might one of those distributors not work on your engine?

In the end they become functionally the same, the ones that are non ESC in the first place just make for a cleaner installation.

J-Spec C10 · 01-27-2003, 05:53 PM

I had ESC in my truck, (82 305/700r4) all I did was un plug it and I put in a dist. from a '79 350, it's worked great for 3 years now.

my 85 gmc · 01-27-2003, 06:07 PM

I just want to try this modification since I already have a Crane Advance Kit if it works I will change to a new HEI(non esc) distributer, but if it does not work I don't want to be stuck with a new part that is useless.
My only concern is some people say these engine's will spark knock badly without the ESC.
Keep the opinions coming guy's!

Thanks Rob

PHOENIX · 01-27-2003, 06:28 PM

I went from the stock ESC distributor to a Proform dist. It was about $150 at a local shop. I left the "computer" behind the glove box and just disconnected the wire, its still just sitting there, Ill fix that later. Anyway I have had this dist. for a couple years now and everything is great. I ahve replaced one module and coil. The coil was probly good, but the module was for sure bad. I bought them both because I got stranded and the guy who gave me a ride to AutoZone, Im sure wouldnt want to make another trip, So I bought them both. Anyway no problem with switching and I have had good luck with the cheap Proform distr.

MylilBowTie · 01-27-2003, 06:44 PM

305s are pretty well known to ping. I would just get an older pre ESC distributor and have it rebuilt with new parts. I would also get an Adjustable Crane vacuum canister for it (you already have it). They should be able to setup a nice advance curve for you. The kit comes with different springs so that the advance curve can be tailored to your engine. That should be a pretty good help to prevent the detonation.

The ESC will retard the timing if it picks up any pinging that is detected by the knock sensor in the engine on the passenger side.

PHOENIX · 01-28-2003, 01:14 PM

Ohh yeah I had a 305 in my truck with the esc distr. Then I put a 350 in. After a few months of having the 350 in my distr. starting acting really wierd, has nothing to do with the 350. But I bought a new one for the 350. So I couldnt tell you if a different distr. would cause pinging in your 305, but it wont in a 350. Atleats from my expeirence.

vmax · 01-29-2003, 02:56 PM

hey guys when you did the esc change over were did you get your power supply from or was the power already there?

thanks,vmax

PHOENIX · 01-29-2003, 03:09 PM

Power Supply?

The esc just has a plug that come out of the firewall and plugs into the distributor. All you have to do is unplug that plug and put a new distr in, hook up the wires on the cap and your ready to go. The wires go into the firewall and into a "computer" behind the glove box. You can remove this too, and swervin has instructions on his site. CHECK THIS OUT:
http://www.73-87.com/garage/escrepl.htm

My bad, I forgot that you already read that

.

Today on my lunch I noticed a truck in front of me (73-87), couldnt determine the exact year, I was behind him the entire time. Anyway he had a badge on his tail gate that said ESC readl big then under it, it said Electronic Spark Control. Anyone ever seen that badge before?

01-27-2003, 05:22 PM	#1
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	Changing to a non-ESC distributer? I was reading an article in Swervin Ervin's website titled "changing to a non-ESC distributer at the bottom of this article it tells how to bypass the ESC part of the ESC distributer. Has anyone tried this modification? My truck has a 305 LE9 engine and I plan to change the camshaft and intake this winter and don't know if I want the computer changing the timing advances on my truck. The reason I'am asking about this modification along with a recurve of the current dist seems cheaper and can be reversed if spark knock is noticed, since a new non-ESC dist is at least $200 and might not work on this engine. Thanks Rob Also I always run 92 octane gasoline.

01-27-2003, 05:53 PM	#3
J-Spec C10 Whats this wire for?.... Join Date: Dec 2002 Location: Barrie, Ontario, CANADA Posts: 378	I had ESC in my truck, (82 305/700r4) all I did was un plug it and I put in a dist. from a '79 350, it's worked great for 3 years now. __________________ Kyle CANADIAN CONNECTION '82 C10 Resto-Custom--> * 2 1/4" manifold back dual exhaust with Hooker Aerochambers & High Flow Cats Taylor Ignition Wires Centerline 15" Telstars with 32"x10" mudders

01-27-2003, 06:07 PM	#4
my 85 gmc Registered User Join Date: Jan 2003 Location: Moncton New Brunswick Posts: 56	Changing to a non-ESC disttributer? I just want to try this modification since I already have a Crane Advance Kit if it works I will change to a new HEI(non esc) distributer, but if it does not work I don't want to be stuck with a new part that is useless. My only concern is some people say these engine's will spark knock badly without the ESC. Keep the opinions coming guy's! Thanks Rob

01-27-2003, 06:28 PM	#5
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	I went from the stock ESC distributor to a Proform dist. It was about $150 at a local shop. I left the "computer" behind the glove box and just disconnected the wire, its still just sitting there, Ill fix that later. Anyway I have had this dist. for a couple years now and everything is great. I ahve replaced one module and coil. The coil was probly good, but the module was for sure bad. I bought them both because I got stranded and the guy who gave me a ride to AutoZone, Im sure wouldnt want to make another trip, So I bought them both. Anyway no problem with switching and I have had good luck with the cheap Proform distr. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

01-27-2003, 06:44 PM	#6
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	305s are pretty well known to ping. I would just get an older pre ESC distributor and have it rebuilt with new parts. I would also get an Adjustable Crane vacuum canister for it (you already have it). They should be able to setup a nice advance curve for you. The kit comes with different springs so that the advance curve can be tailored to your engine. That should be a pretty good help to prevent the detonation. The ESC will retard the timing if it picks up any pinging that is detected by the knock sensor in the engine on the passenger side. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

01-28-2003, 01:14 PM	#7
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Ohh yeah I had a 305 in my truck with the esc distr. Then I put a 350 in. After a few months of having the 350 in my distr. starting acting really wierd, has nothing to do with the 350. But I bought a new one for the 350. So I couldnt tell you if a different distr. would cause pinging in your 305, but it wont in a 350. Atleats from my expeirence. __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION *

01-29-2003, 02:56 PM	#8
vmax Registered User Join Date: Sep 2002 Location: michigan Posts: 25	hey guys when you did the esc change over were did you get your power supply from or was the power already there? thanks,vmax

01-29-2003, 03:09 PM	#9
PHOENIX Registered User Join Date: Oct 2002 Location: Phoenix, Arizona Posts: 4,703	Power Supply? The esc just has a plug that come out of the firewall and plugs into the distributor. All you have to do is unplug that plug and put a new distr in, hook up the wires on the cap and your ready to go. The wires go into the firewall and into a "computer" behind the glove box. You can remove this too, and swervin has instructions on his site. CHECK THIS OUT: http://www.73-87.com/garage/escrepl.htm My bad, I forgot that you already read that . Today on my lunch I noticed a truck in front of me (73-87), couldnt determine the exact year, I was behind him the entire time. Anyway he had a badge on his tail gate that said ESC readl big then under it, it said Electronic Spark Control. Anyone ever seen that badge before? __________________ * AVOID: LOPER'S PERMORANCE / LOPERSPEED.COM OF PHOENIX, AZ & COTTMAN TRANSMISSION * Last edited by PHOENIX; 01-29-2003 at 04:52 PM.



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