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[GMCnet] Injection versus Carbs [message #73254] Mon, 08 February 2010 10:01 Go to next message
Richard Lister is currently offline  Richard Lister   United States
Messages: 56
Registered: November 2009
Karma: 0
Member
Hi. I'm hoping to be in the market for a GMC in the next couple of months and wondered what thoughts you may have about TBI. Having owned and maintained a'67 Corvette for a few years, I know that I am never going to be gifted in the tuning department... Also, if I am lucky enough to be able to get a GMC it will be used immediately for a road trip of a couple of months at a range of altitudes and temperatures, so TBI would seem to make sense.

So, here's the question; is there a downside to getting a coach with TBI - or having it fitted?

Thanks in advance
Richard
No GMC yet, but fingers crossed...




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Re: [GMCnet] Injection versus Carbs [message #73256 is a reply to message #73254] Mon, 08 February 2010 10:10 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
Messages: 7117
Registered: August 2005
Karma: 2
Senior Member
you will get lots of input on this but here are my reasons ( read "my
reasons)

http://gmcmotorhome.info/howell.html

I now have 2 (yes 2) GMCs , with stock Howell's, and I would have it no
other way

gene



On Mon, Feb 8, 2010 at 8:01 AM, Richard Lister <reliste@yahoo.com> wrote:

> Hi. I'm hoping to be in the market for a GMC in the next couple of months
> and wondered what thoughts you may have about TBI. Having owned and
> maintained a'67 Corvette for a few years, I know that I am never going to be
> gifted in the tuning department... Also, if I am lucky enough to be able to
> get a GMC it will be used immediately for a road trip of a couple of months
> at a range of altitudes and temperatures, so TBI would seem to make sense.
>
> So, here's the question; is there a downside to getting a coach with TBI -
> or having it fitted?
>
> Thanks in advance
> Richard
> No GMC yet, but fingers crossed...
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Re: [GMCnet] Injection versus Carbs [message #73258 is a reply to message #73254] Mon, 08 February 2010 10:17 Go to previous messageGo to next message
GeorgeRud is currently offline  GeorgeRud   United States
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
Senior Member
There are definitely two camps on this. A properly setup Quadrajet does a fine job and is pretty bulletproof, but the EFI is certainly a more up-to-date setup. The problem becomes "what happens if something goes south?", who can fix it? A carb can usually limp you home somehow, whereas the EFI system usually requires a tow into a service facility.

I have the carb on my couch, and it seems to work just fine. But, as more and more technicians come along that have never seen a carb, the EFI may seem like the more logical choice. You can get many opinions on this issue! Jim Bounds at the GMC Coop is in the Carb Camp, others swear by the EFI as the only way to go. Neither setup will give you 15 mpg if that's what you're looking for.


George Rudawsky
Chicago, IL
75 Palm Beach
Re: [GMCnet] Injection versus Carbs [message #73264 is a reply to message #73258] Mon, 08 February 2010 11:08 Go to previous messageGo to next message
Ron is currently offline  Ron   United States
Messages: 250
Registered: February 2004
Location: Conifer, Colorado
Karma: 0
Senior Member
Richard..
I live at 9200 feet of elevation.. I have a 76 Eleganza that runs really well.. BUT, I am changing over to a Fuel injector for the main reason being altitude compensation.. My coach runs very well but low on vacuum and rich.. It is not unusual for me to run less than 6 inches of vacuum at high altitudes at relatively flat running so I am into the power enrichment all the time.. Don't even ask about fuel mileage under those conditions..
I am going all the way with a Howell injector. I am adding a knock sensor, An electronic spark control distributor and a Vehicle speed sensor. I also am installing one of EBL's Flash boards to ease the "learning" capabilities of the ECM..
Just mu .02
Ron


now a P.O.
Conifer, CO
Re: [GMCnet] Injection versus Carbs [message #73267 is a reply to message #73254] Mon, 08 February 2010 11:14 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Richard Lister wrote on Mon, 08 February 2010 11:01

Hi. I'm hoping to be in the market for a GMC in the next couple of months and wondered what thoughts you may have about TBI. Having owned and maintained a'67 Corvette for a few years, I know that I am never going to be gifted in the tuning department... Also, if I am lucky enough to be able to get a GMC it will be used immediately for a road trip of a couple of months at a range of altitudes and temperatures, so TBI would seem to make sense.

So, here's the question; is there a downside to getting a coach with TBI - or having it fitted?

Thanks in advance
Richard
No GMC yet, but fingers crossed...

Richard,
There are more than a few nice GMCs out there and available, but the penetration of electronic fuel injection as an upgrade is not real high. See if you can find one with and one without before you try to use that as a selection issue.
Even then, there is the Howell, Holly, Megasquirt and transplant sources that are all considerations.

Good Luck and tell us what you find.

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
Re: [GMCnet] Injection versus Carbs [message #73269 is a reply to message #73254] Mon, 08 February 2010 12:25 Go to previous messageGo to next message
Steven Ferguson is currently offline  Steven Ferguson   United States
Messages: 3447
Registered: May 2006
Karma: 0
Senior Member
I am Gene's evil twin. I love my Qjet and wouldn't have it any other way.

On Mon, Feb 8, 2010 at 9:01 AM, Richard Lister <reliste@yahoo.com> wrote:
> Hi. I'm hoping to be in the market for a GMC in the next couple of months and wondered what thoughts you may have about TBI. Having owned and maintained a'67 Corvette for a few years, I know that I am never going to be gifted in the tuning department... Also, if I am lucky enough to be able to get a GMC it will be used immediately for a road trip of a couple of months at a range of altitudes and temperatures, so TBI would seem to make sense.
>
> So, here's the question; is there a downside to getting a coach with TBI - or having it fitted?
>
> Thanks in advance
> Richard
> No GMC yet, but fingers crossed...
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Re: [GMCnet] Injection versus Carbs [message #73270 is a reply to message #73269] Mon, 08 February 2010 12:35 Go to previous messageGo to next message
k2gkk is currently offline  k2gkk   United States
Messages: 4452
Registered: November 2009
Karma: -8
Senior Member

I can't tell you how many folks over the years have told
me that there are two sorts of Quadrajet carbs. They are
either great or terrible; no in-between whatsoever. If
you have one that has given good service, but seems to have
been dropping off in performance a bit, find a competent
rebuilder to REBUILD your core. If it has virtually always
been a PITA, swap your core off at a rebuilder and hope that
you end up with one that is a whole bunch better!

It has also long been said about virtually all carburetors,
that the longer you can keep a mechanic away from it, the
better your life and happiness will be.


Mac Macdonald
Oklahoma City



----------------------------------------
Date: Mon, 8 Feb 2010 11:25:00 -0700
From: botiemad11@gmail.com
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Injection versus Carbs

I am Gene's evil twin. I love my Qjet and wouldn't have it any other way.


_________________ORIGINAL MESSAGE ___________________

On Mon, Feb 8, 2010 at 9:01 AM, Richard Lister wrote:

Hi. I'm hoping to be in the market for a GMC in the next couple of
months and wondered what thoughts you may have about TBI. Having
owned and maintained a'67 Corvette for a few years, I know that I
am never going to be gifted in the tuning department...

Also, if I am lucky enough to be able to get a GMC it will be used
immediately for a road trip of a couple of months at a range of
altitudes and temperatures, so TBI would seem to make sense.

So, here's the question; is there a downside to getting a coach
with TBI - or having it fitted?

Thanks in advance
Richard
No GMC yet, but fingers crossed...

______________END OF ORIGINAL MESSAGE___________________

Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Re: [GMCnet] Injection versus Carbs [message #73271 is a reply to message #73269] Mon, 08 February 2010 12:46 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
Messages: 7117
Registered: August 2005
Karma: 2
Senior Member
what is your SOB running? ;>)

gene



I am Gene's evil twin. I love my Qjet and wouldn't have it any other way.
>
> On Mon, Feb 8, 2010 at 9:01 AM, Richard Lister <reliste@yahoo.com> wrote:
> > Hi. I'm hoping to be in the market for a GMC in the next couple of months
> and wondered what thoughts you may have about TBI. Having owned and
> maintained a'67 Corvette for a few years, I know that I am never going to be
> gifted in the tuning department... Also, if I am lucky enough to be able to
> get a GMC it will be used immediately for a road trip of a couple of months
> at a range of altitudes and temperatures, so TBI would seem to make sense.
> >
> > So, here's the question; is there a downside to getting a coach with TBI
> - or having it fitted?
> >
> > Thanks in advance
> > Richard
> > No GMC yet, but fingers crossed...
> >
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
>
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
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Re: [GMCnet] Injection versus Carbs [message #73272 is a reply to message #73254] Mon, 08 February 2010 13:11 Go to previous messageGo to next message
bill schurman is currently offline  bill schurman   United States
Messages: 97
Registered: February 2004
Karma: 0
Member
I live in the Colorado mountains and I have NO power with a carb (Dick Paterson rebuild). If I had the $$ I'd go with a TBI.

Bill Schurman
1978 Palm Beach TZE168V100258
Steamboat Springs, CO
at the base of "Rabbit Ears Pass"
With a 7% grade

--- mr.erfisher@gmail.com wrote:

From: "Mr.erf ERFisher" <mr.erfisher@gmail.com>
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Injection versus Carbs
Date: Mon, 8 Feb 2010 10:46:28 -0800

what is your SOB running? ;>)

gene



I am Gene's evil twin. I love my Qjet and wouldn't have it any other way.
>
> On Mon, Feb 8, 2010 at 9:01 AM, Richard Lister <reliste@yahoo.com> wrote:
> > Hi. I'm hoping to be in the market for a GMC in the next couple of months
> and wondered what thoughts you may have about TBI. Having owned and
> maintained a'67 Corvette for a few years, I know that I am never going to be
> gifted in the tuning department... Also, if I am lucky enough to be able to
> get a GMC it will be used immediately for a road trip of a couple of months
> at a range of altitudes and temperatures, so TBI would seem to make sense.
> >
> > So, here's the question; is there a downside to getting a coach with TBI
> - or having it fitted?
> >
> > Thanks in advance
> > Richard
> > No GMC yet, but fingers crossed...
> >
> >
> >
> >
> > _______________________________________________
> > GMCnet mailing list
> > List Information and Subscription Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
>
>
>
> --
> Steve Ferguson
> '76 EII
> Sierra Vista, AZ
> Urethane bushing source
> www.bdub.net/ferguson/
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist


_______________________________________________
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Re: [GMCnet] Injection versus Carbs [message #73281 is a reply to message #73272] Mon, 08 February 2010 14:31 Go to previous messageGo to next message
Ron is currently offline  Ron   United States
Messages: 250
Registered: February 2004
Location: Conifer, Colorado
Karma: 0
Senior Member
Bill..
I too live in the mountains.. I have pretty good power considering I have the stock 3.09 axle ratio..
And I am going to TBI injection for the reasons I mentioned a little earlier in this post..
Do you live near the Stage Coach State park.. I saw a GMC parked near a house whenever I went past when wqe were there last summer.. Tried to stop a couple of times... But no One home..
Just curious.. Very Happy
Ron


now a P.O.
Conifer, CO
Re: [GMCnet] Injection versus Carbs [message #73284 is a reply to message #73254] Mon, 08 February 2010 15:30 Go to previous messageGo to next message
Jim Galbavy is currently offline  Jim Galbavy   United States
Messages: 1443
Registered: August 2007
Karma: 7
Senior Member
Richard,

You don't say where you live. That could make a difference as to which you choose. Also, if you don't plan on doing your tuning, who will? That's who you need to ask advice from.
Me? Like Steve, I like a stock carb and have one on my 455/307.
It has never given me a day's trouble. I would advise you to when you do decide on a GMC, forget what the PO tells you and get a GMC savy shop go all thru the coach and tell you what is wornout and what needs to be replaced. Then do it all.

jim galbavy
X-CL (ANNIE)
Chesterfield, Va
Re: [GMCnet] Injection versus Carbs [message #73285 is a reply to message #73254] Mon, 08 February 2010 16:23 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
G'day,

As you can see from the signature line I have two GMC's; the one in the USA
has a Paterson Q-Jet and the one in Australia has a Holley Commander four
barrel fuel injection system on an Edelbrock manifold.

I do not know what the fuel mileage is on either one as I have never checked
either, however, I do know that the FI one here goes like a "shower of s#%t"
(that's Aussie for "raped Ape)." ;-)

One thing that I have noted is that there have been a lot of discussions
about a slight hesitation when first applying the gas on the GMCnet. The
Holley does not have that problem AT ALL.

Unfortunately I can't provide any more info on the system or how to tune it
as it was installed by the PO. I do have a spare Q-jet with me just in case
the Holley dies.

Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426


-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Richard Lister
Sent: Tuesday, 9 February 2010 3:01 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Injection versus Carbs

Hi. I'm hoping to be in the market for a GMC in the next couple of months
and wondered what thoughts you may have about TBI. Having owned and
maintained a'67 Corvette for a few years, I know that I am never going to be
gifted in the tuning department... Also, if I am lucky enough to be able to
get a GMC it will be used immediately for a road trip of a couple of months
at a range of altitudes and temperatures, so TBI would seem to make sense.

So, here's the question; is there a downside to getting a coach with TBI -
or having it fitted?

Thanks in advance
Richard
No GMC yet, but fingers crossed...
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
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_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Injection versus Carbs [message #73286 is a reply to message #73254] Mon, 08 February 2010 16:48 Go to previous messageGo to next message
Chr$ is currently offline  Chr$   United States
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
Senior Member
This one has Fuel Injection:
http://gmc.mybirdfeeder.net/GMCforum/index.php?t=pmsg_view&rid=73&id=7536

But no bathroom or kitchen!!!

It doesn't drive that well either.


-Chr$: Perpetual SmartAss
Scottsdale, AZ

77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
Re: [GMCnet] Injection versus Carbs [message #73287 is a reply to message #73254] Mon, 08 February 2010 16:49 Go to previous messageGo to next message
Chr$ is currently offline  Chr$   United States
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
Senior Member
Gahh Wrong link:


http://cgi.ebay.com/ebaymotors/GMC-Party-Bus-NO-RESERVE_W0QQitemZ200434194160QQcmdZViewItemQQptZRVs_Campers?hash=item2eaacf16f0


-Chr$: Perpetual SmartAss
Scottsdale, AZ

77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
Re: [GMCnet] Injection versus Carbs [message #73292 is a reply to message #73287] Mon, 08 February 2010 18:12 Go to previous messageGo to next message
k2gkk is currently offline  k2gkk   United States
Messages: 4452
Registered: November 2009
Karma: -8
Senior Member

How long has this outfit been trying to sell this coach now?

Mac Macdonald
Oklahoma City



To: gmclist@temp.gmcnet.org
From: cchoffataz@yahoo.com
Date: Mon, 8 Feb 2010 16:49:59 -0600
Subject: Re: [GMCnet] Injection versus Carbs

Gahh Wrong link:

(http://cgi.ebay.com/ebaymotors/GMC-Party-Bus-NO-RESERVE_W0QQitemZ200434194160QQcmdZViewItemQQptZRVs_Campers?hash=item2eaacf16f0)

--

Chr$: Perpetual SmartAss
77 Ex-Kingsley 455, Power Drive, 3:21 FD U S S Kobiashi Maru: The Engineer's Motorhome
S T I L L - U N D E R - C O N S T R U C T I O N
Scottsdale, AZ
Photosite: Chrisc "It has Begun"
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Re: [GMCnet] Injection versus Carbs [message #73293 is a reply to message #73271] Mon, 08 February 2010 18:31 Go to previous messageGo to next message
Steven Ferguson is currently offline  Steven Ferguson   United States
Messages: 3447
Registered: May 2006
Karma: 0
Senior Member
It's parked right now :>)

On Mon, Feb 8, 2010 at 11:46 AM, Mr.erf ERFisher <mr.erfisher@gmail.com> wrote:
> what is your SOB running?  ;>)

--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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Re: [GMCnet] Injection versus Carbs [message #73295 is a reply to message #73254] Mon, 08 February 2010 18:45 Go to previous messageGo to next message
Rick Williams is currently offline  Rick Williams   United States
Messages: 256
Registered: July 2004
Karma: 0
Senior Member
Richard

Carbs vs FI is always a good discussion and it is important information. But it should not influence you in your selection of a coach. If you had two coaches that had what you were looking for, except one had a carb and the other an FI, then it would enter into your decision. But that may not happen. So find the right coach and if it has a carb, you can always "upgrade" to FI or "downgrade" to a carb. Or is it the other way around? I can never remember. I put this far down on the list of requirements when selecting a coach.
Good luck with your search and ask plenty of questions. You might consider putting your location with your signature. That will prompt people to tell you about coaches they know of in your area.

Rick


Rick Williams
Bliss, Michigan
1978 Eleganza II
Re: [GMCnet] Injection versus Carbs [message #73299 is a reply to message #73254] Mon, 08 February 2010 19:55 Go to previous messageGo to next message
David L Greenberg is currently offline  David L Greenberg   United States
Messages: 899
Registered: January 2004
Location: Port St Lucie, FL
Karma: 0
Senior Member

On Mon, 8 Feb 2010 18:12:04 -0600 D C *Mac* Macdonald <k2gkk@hotmail.com>
writes:
>
> How long has this outfit been trying to sell this coach now?
>
> Mac Macdonald
> Oklahoma City
>
>
>
> To: gmclist@temp.gmcnet.org
> From: cchoffataz@yahoo.com
> Date: Mon, 8 Feb 2010 16:49:59 -0600
> Subject: Re: [GMCnet] Injection versus Carbs
>
> Gahh Wrong link:
>
>
(http://cgi.ebay.com/ebaymotors/GMC-Party-Bus-NO-RESERVE_W0QQitemZ2004341
94160QQcmdZViewItemQQptZRVs_Campers?hash=item2eaacf16f0)
>
> --
> Re: TZE166V100348 That coach has been for sale, off and on, for the
past ten years. It was a Glenbrook in its previous life and has been sold
3 times in the past couple of years. I don't know why it can't stay sold.
It has always been an AZ coach sold originally in Tucson.

David Lee Greenberg
Port St Lucie, FL
Dedicated to the Preservation of the Classic GMC Motorhome
http://GMCmhRegistry.com
http://www.picturetrail.com/gmcregistry
____________________________________________________________
Nutrition
Improve your career health. Click now to study nutrition!
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Dave Greenberg
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Re: [GMCnet] Injection versus Carbs [message #73300 is a reply to message #73254] Mon, 08 February 2010 20:14 Go to previous messageGo to next message
George Beckman is currently offline  George Beckman   United States
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
Senior Member
Richard Lister wrote on Mon, 08 February 2010 08:01

Hi.

So, here's the question; is there a downside to getting a coach with TBI - or having it fitted?

Thanks in advance
Richard
No GMC yet, but fingers crossed...




Richard,

You did not mention your state. If you are in California, and want a TBI on a coach newer than '75 they really don't like it. They really, really don't like it. CA will make you put the quadrajet back on to make more smog so you can pass smog.



'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
Re: [GMCnet] Injection versus Carbs [message #73313 is a reply to message #73271] Mon, 08 February 2010 22:00 Go to previous messageGo to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
Senior Member
Mr ERFisher wrote on Mon, 08 February 2010 12:46

what is your SOB running? ;>)

gene



I am Gene's evil twin. I love my Qjet and wouldn't have it any other way.





Ah...ya...Steve...just what does your SOB have...EFI or Carb?? Very Happy Very Happy Very Happy


Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.
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