| EFI vs Carb [message #326032] |
Wed, 15 November 2017 14:33  |
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GMC Jimmy
Messages: 199
Registered: September 2016
Location: Niagara, Ontario
Karma: 2
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Senior Member |
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Hello All,
I'm considering an EFI system over a carb re-build, I would like some "real world" experience, practical vs theory.
I can have my Rochester Quadrajet re-built or I can install an EFI system, why one over the other and if EFI which system to go with?
I have read a bit about the Fitech Go Street and the Go EFI, is there a major difference between the two (if you chose one over the other) and why, or is there a brand which works better with our GMC's?
As always thank you for your feedback,
Regards,
Mike
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| Re: EFI vs Carb [message #326034 is a reply to message #326032] |
Wed, 15 November 2017 14:46  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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I am currently vacillating. My coach has an MSD setup on it, which Miguel installed for the PO. It gets shit mileage. Conversation with the gurus indicateds it's capabl;e of the same as the carb, so I'm looking into other reasons. One of which is the engine is an 'ooutlaw' byuilt to spec for one of the vendors by Jasper Engines (before the vendor found out Jasper basically builds junk). I will most likely have Ken H's friend build me an engine specifically for motorhome service and then decide whether the MSD can be tuned to it - which every indication is that it can - or whether it goes to Craigslist and I put a Q-jet back on it, or figure a way to fit an AFB under the hatch.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] EFI vs Carb [message #326050 is a reply to message #326032] |
Wed, 15 November 2017 20:19 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ron,
In 2008 I installed a Q-jet rebuilt by Dick Paterson and a recurved distributor from him as well. I have put at least 50,000 trouble
free miles on them.
I have no idea what kind of mileage I get all I can tell you Double Trouble (3.21 to 1 Final Drive) will run all day long at 70-75
without a hiccup.
To get around the vapor lock problem JimB installed a small Facet electric fuel pump on the AUX tank that comes on when I switch to
aux.
Helen and I made it up to the Eisenhower Tunnel (11,158 ft) albeit in the right lane.
Carb = $390
Dist = $190
Pump = $40
Total = $520
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Mike
Sent: Wednesday, November 15, 2017 2:33 PM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] EFI vs Carb
Hello All,
I'm considering an EFI system over a carb re-build, I would like some "real world" experience, practical vs theory.
I can have my Rochester Quadrajet re-built or I can install an EFI system, why one over the other and if EFI which system to go
with?
I have read a bit about the Fitech Go Street and the Go EFI, is there a major difference between the two (if you chose one over the
other) and why,
or is there a brand which works better with our GMC's?
As always thank you for your feedback,
Regards,
Mike
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GMCnet mailing list
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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