HEI with an ECM, 1984 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**RPOZ11** · 10-08-2005, 04:00 PM

Another inquiry on these...I have been told that GM possibly made these with the weights to build in a curve on ECM HEI's? He said it was only for one year or possibly 2 years only, and may be in Camaros or something like that!
Anybody have any knowledge about this, and if so, where could I find one if it was manufactured?
Thanx!

corn · 10-08-2005, 06:51 PM

My '84 doesnt have an ECM. Are you sure that yours does?

**RPOZ11** · 10-08-2005, 06:59 PM

Yes! Mine is a federal fleet order, with alot of std equipment missing!
It has the ECM !
No Smog on the passengers side manifold; only on 1 side!!!!!!

SSC's76 · 10-09-2005, 11:03 AM

It doesent matter which weights you try to use the curve means nothing if the ECM is adjusting the advance. The only perf mod you can do is a spring kit to allow advance quicker. Sorry but you heard a load of

**RPOZ11** · 10-09-2005, 01:34 PM

Quote:

Originally Posted by SSC's76

It doesent matter which weights you try to use the curve means nothing if the ECM is adjusting the advance. The only perf mod you can do is a spring kit to allow advance quicker. Sorry but you heard a load of

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You know, I felt that way when he told me, and now you reaffirm what I felt again by your input here.
I need to inquire thru California Referees to decide what is allowed....although I can drop in a non-ECM HEI and disconnect the system but ecm stuff is not my specialty!
Thanx!!!

10-08-2005, 04:00 PM	#1
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	HEI with an ECM, 1984 Another inquiry on these...I have been told that GM possibly made these with the weights to build in a curve on ECM HEI's? He said it was only for one year or possibly 2 years only, and may be in Camaros or something like that! Anybody have any knowledge about this, and if so, where could I find one if it was manufactured? Thanx! __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS Last edited by RPOZ11; 10-08-2005 at 04:29 PM.

10-08-2005, 06:59 PM	#3
RPOZ11 72 BB C30 Super LongHorn Join Date: Nov 2002 Location: Chavez Ravine Posts: 1,606	Yes! Mine is a federal fleet order, with alot of std equipment missing! It has the ECM ! No Smog on the passengers side manifold; only on 1 side!!!!!! __________________ 72 BB C/30 Longhorn Super HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM HO72 build : http://67-72chevytrucks.com/vboard/s...d.php?t=714492 2017 SS Last edited by RPOZ11; 10-08-2005 at 10:00 PM.

10-09-2005, 11:03 AM	#4
SSC's76 No No Join Date: Jun 2005 Location: Pueblo Colorado Posts: 1,781	It doesent matter which weights you try to use the curve means nothing if the ECM is adjusting the advance. The only perf mod you can do is a spring kit to allow advance quicker. Sorry but you heard a load of __________________ 1976 Custom Deluxe SWB Med FMB.3/4 Drop. Gen VI 454, Muncie HD 3 speed With Modified OE Hurst Shifter, 3.73 12 bolt, GMPP HO roller cam, Hooker headers, Performer intake with modified Q-jet, Accel distributor. Best 1/4 12.3 @108. Funnest run 19.84 @88 full 1/4 mile burn out. 1997 K1500 ext cab 5.7 stock except muffler Last edited by SSC's76; 10-09-2005 at 11:04 AM.

10-08-2005, 06:51 PM	#2
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	My '84 doesnt have an ECM. Are you sure that yours does?



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