Home » Public Forums » GMCnet » Electronic QuadraJet and factory Electronic Spark Control (CCC, ESC, E4ME, E4MC, E4MED, E4MEF)
Re: Electronic QuadraJet and factory Electronic Spark Control [message #333719 is a reply to message #333714] |
Tue, 19 June 2018 19:03 |
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Matt Colie
Messages: 8547 Registered: March 2007 Location: S.E. Michigan
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GMC2000 wrote on Tue, 19 June 2018 19:00thanks for clarifying. interesting. I have very little experience with Q-jets, webers are what Im most familiar with and would prefer but the floor is the limit here.
FI is great but all in all, if youre familiar with carb tuning, the reliability and the amount of spare parts (both in cost and weight) to carry along and then be able to use effectively, is much less.
the E.Quad-Jet does seem like a perfect compromise between carb or FI for these though but definitely it would take some work to have something better than just a regular Q-jet.
ESC and a stock Q-jet seems to be a sound logical step up without adding too much unneeded complexity and cost. I'll keep looking into this..
the vapor lock is always tricky but Im sure it can be eliminated while keeping the Q-jet, thats not really directly related to the carb but the fuel supply system, right?
Edit to add: a GMC site about FI just came up in my 'ESC' searching : http://www.gmcws.org/Tech/efi/efi.html
its from '00 and has this tidbit "Since our distributors do not have the ability to respond to ESC, we can use something like the manual MSD spark adjustment and the MSD knock sensor. (MSD devices are used to permit electronic spark advance and retard as a means of providing appropriate timing for engine loads, altitude and similar conditions where it is desirable to be able to adjust the timing without manually rotating the distributor.)"
is this still the case? and brings me to this question, do the chevy distributors interchange? (fit into the Olds 455)
GMC2k,
To answer your last question, NO, most GM distributors go the other way.
I happen to like real fuel injection systems. This completely eliminates the closed loop carburetors of the mid-70s. Those were just a stop gap that provided miserable driveability and fuel economy.
With the right setup, popping the hatch and tweaking the distributor is just not a big deal. Now, if I had the time and money to go to a full system as many have done here with EBL and all, that might be nice, but the real gain here is the engine mapped timing and knock sensing. As it is, my coach goes all over the place at 9.2MPG (when it has 8 good pistons).
If your coach has HEI, you should carry at least a spare US made module and the correct coil (ours are the rare number) because HEI is not great for reliability. (That is my personal view based on experience with other's GM products.)
Want to learn more about Q-jets??
http://oldcarmanualproject.com/manuals/Carbs/Rochester/QJet/index.htm
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 00:48
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 15:12
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 16:15
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 18:00
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 19:59
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: mrgmc3 on Tue, 19 June 2018 22:04
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 19 June 2018 22:34
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Wed, 20 June 2018 12:52
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Thu, 21 June 2018 12:05
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Sat, 30 June 2018 23:03
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Sun, 01 July 2018 02:37
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Sun, 01 July 2018 08:36
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
By: jimk on Sun, 01 July 2018 10:13
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Sun, 01 July 2018 16:21
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: [GMCnet] Electronic QuadraJet and factory Electronic Spark Control
By: jimk on Sun, 01 July 2018 19:16
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Sun, 01 July 2018 19:14
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 03 July 2018 03:53
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 03 July 2018 10:18
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Re: Electronic QuadraJet and factory Electronic Spark Control
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Re: Electronic QuadraJet and factory Electronic Spark Control
By: GMC2000 on Tue, 03 July 2018 17:57
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Re: Electronic QuadraJet and factory Electronic Spark Control
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