84 carb questions
Thread Starter
Instructor
Joined: Nov 2001
Posts: 210
Likes: 0
From: Watertown CT
84 carb questions
question about switching to a carb setup on my 84. whats the safest way to wire up the fuel pump? and what's a popular pressure regulator for the swap? Please dont ask why I want to do it, i've been over that several times.
Burning Brakes
Joined: Sep 2006
Posts: 1,202
Likes: 3
From: MD
If you need to ask about an 84-carb switch you can PM me, Happy Dad, AZC4, or one of a number of carb guys. Run a search on carbs or something and there are threads out there (although a lot seem to end up locked). To answer your immediate questions, I am running a Mallory 4307M regulator. You just need to find some kind of return-style regulator adjustable from 5-20 or so. The Mallory piece is a great regulator, but it's expensive to plumb cause it uses AN-8 fittings.
Wiring the pump...a lot of people just leave it alone. It will work without altering the wires. Trackman44 sent me a wiring diagram to eliminate the ECM from the pump circuit. If you want to do it I can eMail you the same diagram. I'm taking the ECM out of the equation as well.
What carb/manifold/cam/etc are you going to run? The stock 84 cam is really small. A nice cam, 650cfm Carb, and Weiand Stealth (my new favorite manifold) are a good way to go. Good luck.
Wiring the pump...a lot of people just leave it alone. It will work without altering the wires. Trackman44 sent me a wiring diagram to eliminate the ECM from the pump circuit. If you want to do it I can eMail you the same diagram. I'm taking the ECM out of the equation as well.
What carb/manifold/cam/etc are you going to run? The stock 84 cam is really small. A nice cam, 650cfm Carb, and Weiand Stealth (my new favorite manifold) are a good way to go. Good luck.
Thread Starter
Instructor
Joined: Nov 2001
Posts: 210
Likes: 0
From: Watertown CT
i was thinking an edelbrock performer manifold and a performer 600 manual choke carb. i hear they run great consistantly and are easy to set up. i dont know much about my engine unfortunately. I was told by the previous owner that he replaced the original L83 with a new 383, but i dont know the exact cam specs. it doesnt really lope when it idles so it cant be too big. thats another issue w/ the crossfire, even if i figure out the ignition issues, the ECM still wont be optimized for this engine, and there arent a whole lot of people who know how to tune those eprom files. i could get a newer style pickup tbi ecm and have different connectors soldered into it, but that costs money too, and im not interested in learning anything about ecm tuning....
so, for those who dont touch the wiring and run a carb, you're just relying on the oil pressure switch to turn on the pump relay after you start cranking? thanks again
so, for those who dont touch the wiring and run a carb, you're just relying on the oil pressure switch to turn on the pump relay after you start cranking? thanks again
Burning Brakes
Joined: Sep 2006
Posts: 1,142
Likes: 0
From: Spring Grove Illinois
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Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by da747
so, for those who dont touch the wiring and run a carb, you're just relying on the oil pressure switch to turn on the pump relay after you start cranking? thanks again
ECM tuning is not necessary for a decent amount of performance gain. My car has the stock ECM and the stick chip. It seems you have the wrong car. If you don't want to leave it stock, "and im not interested in learning anything about ecm tuning....", you should be working on something you CAN.
RACE ON!!!
Thread Starter
Instructor
Joined: Nov 2001
Posts: 210
Likes: 0
From: Watertown CT
****UPDATE***** i found a tech tip on elkabong's page about excessive play in the throttle plate shafts. i went outside and looked at my throttle bodies.... sure enough if i pick up the linkage on the rear body the plate opens a good 5 degrees at least before the front one even starts to move. and it clicks like crazy up and down. thats probably what ive been chasing for 5 years. i just never had another car to reference against so i never considered it. im surprised no one on here thought of that. so if anyone reads this and isnt getting codes in their 82 or 84 but has erratic running conditions, check for play in your throttle plate shafts. thanks for the help though guys, appreciate it.
Instructor
Joined: Feb 2004
Posts: 170
Likes: 0
From: SWEDEN 1984 c4 with Edelbrock RPM toppkit
Some pics on my C4 carbcar:
http://www.vetteforum.org/attachment...5&d=1155595652
http://www.vetteforum.org/attachment...1&d=1155595484
http://www.vetteforum.org/attachment...6&d=1155595718
http://www.vetteforum.org/attachment...0&d=1123388882
http://www.vetteforum.org/attachment...1&d=1123388922 I use the stock pump and just put the regulator on 5-5,5psi
the hole in the hood (soon coverd with a scoop):
http://www.vetteforum.org/attachment...7&d=1145746864
http://www.vetteforum.org/attachment...8&d=1145746877
http://www.vetteforum.org/attachment...5&d=1155595652
http://www.vetteforum.org/attachment...1&d=1155595484
http://www.vetteforum.org/attachment...6&d=1155595718
http://www.vetteforum.org/attachment...0&d=1123388882
http://www.vetteforum.org/attachment...1&d=1123388922 I use the stock pump and just put the regulator on 5-5,5psi
the hole in the hood (soon coverd with a scoop):
http://www.vetteforum.org/attachment...7&d=1145746864
http://www.vetteforum.org/attachment...8&d=1145746877
Tech Contributor
Joined: Jun 2004
Posts: 20,860
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
I retained the TBI in my '84 when I turbo'd the engine. I dumped all that crossfire crap and its lousy fuel distribution, and put a larger two barrel 454 TBI and smaller plenum manifold on it.
Intermediate
Joined: Mar 2007
Posts: 45
Likes: 0
From: inman sc
coming over to the Dark Side also!!!
On my 86,I am using the torker 2 manifold and 670 holley avenger carb and a medium grind cam, along with headers. As for the TV cable, I have found a web site that has execellent info on how to hook up this cable. Its very easy,I can even under stand it. The site is: Bowtie Overdrives.com Everything else has been a no brainer. Thanks
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
I use the Aeramotive regulator set at 7 lbs and the factory pump.
I use the holley kit for the trans kick down and cable holder that Jegs has ,Holley has everything.
You will have to use a switch hooked to the trans to engauge the tork converter.
You can use a Holley carb with electric choke and vaccum 2nd daries.
I also use the MSD box 6al and distributor MSD and plug it into the MSD box.The Air cleaner Jegs also has which is low profile.
www.mauiscuba.net/carpics/fuelpics/2.gif
www.mauiscuba.net/carpics/fuelpics/5.gif
www.mauiscuba.net/carpics/fuelpics/pf.gif
www.mauiscuba.net/carpics/carb/Image0001.JPG
www.mauiscuba.net/carpics/carb/Image0004.JPG
www.mauiscuba.net/carpics/carb/Image0007.JPG
If you want more pics just substitute 1-7 after the 000
I use the holley kit for the trans kick down and cable holder that Jegs has ,Holley has everything.
You will have to use a switch hooked to the trans to engauge the tork converter.
You can use a Holley carb with electric choke and vaccum 2nd daries.
I also use the MSD box 6al and distributor MSD and plug it into the MSD box.The Air cleaner Jegs also has which is low profile.
www.mauiscuba.net/carpics/fuelpics/2.gif
www.mauiscuba.net/carpics/fuelpics/5.gif
www.mauiscuba.net/carpics/fuelpics/pf.gif
www.mauiscuba.net/carpics/carb/Image0001.JPG
www.mauiscuba.net/carpics/carb/Image0004.JPG
www.mauiscuba.net/carpics/carb/Image0007.JPG
If you want more pics just substitute 1-7 after the 000
Burning Brakes
Joined: Sep 2006
Posts: 1,142
Likes: 0
From: Spring Grove Illinois
Super Pic's Keep em Coming
...I also forgot about 3rd gen .org..They have all the carb answers you could think of..helped me out alot...And 
the TV Cable placement is VERY important for the 700R4..... Unless you should go to a manual V/B which does'nt use it..But trans pressures get a little higher and that opens up an other door
Either Way No Biggie.....Converting to "Old School Junk" 
is pretty straight forward
Melting Slicks
Joined: Nov 2004
Posts: 2,799
Likes: 2
From: Cape Coral FL
A pic of my "old school junk" in process...
This is my "rat rod" Vette project.... the hole in the hood is for the C4R scoop (building a pan to work with the scoop openings). Definitely not for the purist or "diaper wiper".
This is my "rat rod" Vette project.... the hole in the hood is for the C4R scoop (building a pan to work with the scoop openings). Definitely not for the purist or "diaper wiper".
Tech Contributor
Joined: Jun 2004
Posts: 20,860
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
)