Question about 2007 Chevrolet Cobalt Coupe

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350 chev timing

Hi there,just wanted to know how to set up the hei distributor timing for 350 chev thanks.

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What exactly are you working on. Are you wanting to know how to install a HEI distributor into a 1970's or 1980's small block chevy? Just wondering, it says 2007 cobalt?

Posted on May 15, 2009

  • Tiny Threlfall Feb 04, 2014

    sorry i need to find out how to remove the alternater from a 2003 vy calais its a 350 chev engine dont have a clue how to do it

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INSTALLING HEI IGNITION AND NEED HELP


i have no issues WITH CAPS, used to have a home computer in 70s with ASR33 printing terminal that did all caps..... all the time.
Is this a 1990 jeep? and what engine? you never stated the engine
4.2 L AMC straight-6 engine?

what distributor are you running off what engine, and what year.
is it with full mech, advance and vacuum advance , pre 1986?
the nutter bypass, 4.2L
it cuts the ECU out of spark controls.

this means ECU advance is killed, on now only the dumb
module runs advance.
the stock system had a ballast resistance wire. and the
start wire to the the coil bypasses this wire. for full coil power.
this is not used in HEI.
infact there are many HEI setups. which one. 7wire. ?

here is 7
http://www.msextra.com/doc/ms1extra/MS_Extra_Hardware_Manual_files/ew7hei.gif


if i had your rig, it upgrade it to MSD. sure would. done many.
by doing that , all the mystery of parts, that works ends.
if you need help, spec out your set up, including, schematic
and BOM, parts used, p/n of parts used.

here are 3 HEI ( 4,5,7 pin)

http://brianesser.com/tech/wiring/msd/WDTN_pn9615_Page_030.jpg

The biggest issues is spark timing curves.
getting them right for those Webers.
and standalone spark controls win here.

the right way
http://www.jegs.com/p/MSD-Ignition/MSD-Ignition-Controller-for-GM-EFI-Carbureted-LS-Engines/758329/10002/-1

You tune the spark advance for YOUR engine and setup.
not that funky stock spark box and nutter mod.

my guess, is you burned up the ballast when it hit the real
inside distributor coil primary, that is totally the wrong coil
for a ballast. I hope it dont burn up a good coil,,,,,,,
The coil and all wiring for EFI must be correct
and the bypass for starting , is useless. for that distrubutor
because it runs 12v all the time, so if the ballast did stay good
the HEI would be running way too low , at 8v. running.
and would fail.
here is a great HEI page, under dev. but is good.

http://www.crankshaftcoalition.com/wiki/Hot_rodding_the_HEI_distributor

this link above shows how to get HEI right on a carb car
but fails to show the benefits of true spark advance tuning.
Great fuel economy can be attained under light loads
with large spark advance. and then less under full load.
(no pinging too)
The spark advance , allows the flame front to start at the correct time
to take advantage of piston rod angles.... and not send unburned fuel out the exhaust.
Id put an MSD in there and tune it carefully, I would. (webers a given)_

Feb 03, 2014 | 1990 Jeep Wrangler

1 Answer

Chevy 350 firing order diagrams


1-8-4-3-6-5-7-2

TDC on #1 compression stroke,not exhaust

Number 1 on the dist cap-- is at about 7 o clock,
as you face the motor from the front

2-4-6-8
1-3-5-7

1&2 are at the front-- as you face it

Sep 14, 2013 | Cars & Trucks

1 Answer

I have a 72 chevelle with a 350 ci , I put an hei distrubitor in it but now my alt wont charge and its brand new what should I do...


The HEI has nothing to do with the alternator

The HEI needs battery voltage,not the resistor,
that was there for the point ignition distributor

Unless you moved wires around to feed the HEI,
you just diagnose the alternator as usual

New doesn't mean it works
Have to know how to test it

Sep 10, 2013 | 1986 Chevrolet C1500

1 Answer

I have a 1985 Chevy 350 with an ac delco hei distributor and i have the plug wires crossed up somewhere. I need a diagram to show the correct plug wire placement please. Thanks


This should do it.
You can also do an internet search for a standard 350 Chevy engine.
The firing order is 1-8-4-3-6-5-7-2
The order is the same for engines from the mid 1990s back to the late 1970s.

images?q=tbn:and9gctgooegtkmpd2von7rsnyth6zhjrqslhu5zh4othxp_vwy1j9ss

Jan 16, 2013 | Cars & Trucks

2 Answers

Fireing order for 5.3 engine


Hi!!
Here are the two engine configurations WITH AND WITHOUT HEI SYSTEM, they both have the firing order 1-8-4-3-6-5-7-2 and the distributor ROTATES CLOCKWISE.
NO HEI SYSTEM
1kbron_124.jpg

HEI SYSTEM
1kbron_125.jpg

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Mar 19, 2011 | Chevrolet Chevette Cars & Trucks

1 Answer

Wiring for a small block 350


need to know if its a HEI cap and rotor or not. HEI caps have the coil built into them , an all in one ignition as compared to a external cylindrical coil.
you need to know that. either the distributor cap is a huge hurken thing (HEI) or it has an external coil somewhere or the cap has a ninth distributor hole in the middle of the cap to put a coil. wire.
after you figure out which one it is then you have to either go to www.autozone.com and study chevy wiring or buy a haynes manual for the similar vintage engine. for the external coil I would try a chilton manual for a chev truck before 1972. for HEI anytime thereafter. I may be off by a few years on the age of the engine. but hopefully you got an idea of what to do, or just google chev engine wiring? and study away.
good luck

jm

Jul 27, 2010 | 1980 Chevrolet Corvette

1 Answer

Wire position for 75 Chevy 350 HEI on the


Order is 18436572. Put the timing mark on the crank at 0 and the rotor should be pointing either to the firewall or the front of the engine. If at the wall, turn the crank one more time and it is now pointing at the #1 wire position on the distributor.
left side cylinders are 1357 right, 2468 wire order is in the direction the rotor turns when cranking.

Apr 14, 2010 | Chevrolet Chevy Cars & Trucks

1 Answer

My 1997 chev sub. 1500 2wd starts fine. but


Your cap is cracked on your distributor....if you have a cap/points/rotor.

Condensation is building up in the cap.

Let me know what you have.

Size of motor and if you ahve HEI.

Jan 19, 2010 | 1997 Chevrolet Suburban

1 Answer

Wiring an hei distributor


You shouldn't need a spark box because thee coil is located in the dist. cap. You need to run a 12v switched power source to the side of the dist. cap that is marked dist. if it isn't maked it is the term. that is on the front right of the conector pad. the one on the left is for hooking up a tach.

Oct 04, 2009 | 1986 Chevrolet C1500

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