To Carb or not to Carb? Fuel conversion. April 12, 2009, 05:56:21 PM My shortblock is almost finished. I am considering swapping to a carb. Can someone explain what is involved in swapping an efi pump to a low pressure carb pump?Is there an in tank unit I can swap in? If not, can I swap in a piece of fuel line instead of the in tank unit? I could then splice an in-line unit on the frame.Thanks,-Dan Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #1 – April 12, 2009, 06:18:52 PM You can stay with the pump thats in it if you use a 6-9Psi fuel pressure regulator to meter the fuel correctly. This is what I was going to do on my car as well. Maybe someone can back me up on this as I am not 100% sure and don't want to give incorrect advice. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #2 – April 12, 2009, 06:22:56 PM Quote from: danzajax;267096My shortblock is almost finished. I am considering swapping to a carb. Can someone explain what is involved in swapping an efi pump to a low pressure carb pump?Is there an in tank unit I can swap in? If not, can I swap in a piece of fuel line instead of the in tank unit? I could then splice an in-line unit on the frame.Thanks,-DanIf the thing is gonna be a driver....what is making you want to swap on a carb? Is it parts availability? Is it cash??? Is it info?? Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #3 – April 12, 2009, 07:51:25 PM I knew this question would come up. Yes I know about efi low end torque. Yes I know about long runners, idle, streetabiliy, etc.Its not a driver. Its a weekender. I wanted to go carbed because of the following:1. Look. I want to have a big chrome air cleaner on top of a quad with tall shiny valve covers.2. Simplicity. I want to clean up the engine bay.3. Cam+Heads. If I go cam+heads I would need to convert to Mass-air. I would be more likely to get a mega-squirt. Top it off with a GT40 intake.Yes my current EFI runs fine but the engine in the car has a miss (due to real low compression on #4).I am not even 100% sure that its the way I want to go. I am really interested in running a MS setup. Just wondering what it would take to convert. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #4 – April 12, 2009, 08:17:29 PM Using a low pressure adjustable fuel pressure regulator works. I've run an F/I pump and lines with an adjustable regulator on two vehicles. No issues. If you are interested in one which will snap lock into your existing F/I lines, I have one. PM me for more info. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #5 – April 12, 2009, 08:50:48 PM I vote "Not"Stay EFI.Your car is an 88. You can swap the in-tank pump out for a higher flow unit. It's been done buy several people on this board.Going carb is a big step backwards IMO...especially for a "driver". Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #6 – April 12, 2009, 09:04:33 PM Quote from: Chuck W;267129I vote "Not"Stay EFI.Your car is an 88. You can swap the in-tank pump out for a higher flow unit. It's been done buy several people on this board.Going carb is a big step backwards IMO...especially for a "driver".Its not a driver. And how would swapping out my pump for a higher flow fix lumpy cam + Speed density pyness? Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #7 – April 12, 2009, 09:48:02 PM you cant do a lumpy cam and sd thats where the pyness lies, just find a pigtail off a mass air mustang and wire it in to the sd harness, grab a a9l/a9p ecm and be done with it.but I cant talk, I just finished up doing a carbed 302 myself lol. Fuel system I would just get a external pump like a holley blue, and a regulator. Sump the tank or make a pickup out of -8 an line and run that all the way up with -6 an line.heres the kit I will be going with: http://store.summitracing.com/partdetail.asp?part=SUM%2DPUMPKIT7A&FROM=MGand I will be sumping my tank for more an fittings and an hose. with this kit http://store.summitracing.com/partdetail.asp?part=SUM%2DTANKKIT3&FROM=MG Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #8 – April 12, 2009, 09:52:12 PM by using a speed density cam. There are a few available. You could also have a custom one made that would give you more power, better drivability, and gas mileage then an after market one. Get a carb look with efi.Use a carbed lower with either a efi carb style throttle body or stick with efi. Every reason to go carbed dosen't hold alot of anything agaisnt efi. The wires are already there. You can hide them easily. I guess there's too many wires in this picture.http://www.coolcats.net/eric/86convertible/images/conv18.jpg Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #9 – April 12, 2009, 10:28:45 PM So many carb-haters on this board. Still, only two people actually answered my original question. Seriously, no one wants to run a carb just for the hell of it? At least Bane isn't bustin' my balls. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #10 – April 12, 2009, 10:33:20 PM Most of us need to pass emissions. There are many walk through for what you need to do to switch to a carb. I actually googled a site I used to frequent with a complete walkthrough and a list of what is needed. Its currently under construction and has been for a while, otherwise I would have linked you to it.Every carb'd vehicle I have ever driven has been a blast. But EFI is the best of all worlds. Unless you already have a carb'd motor, I really don't see any point in swapping it out. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #11 – April 12, 2009, 10:34:12 PM Quote from: Bane;267137heres the kit I will be going with: http://store.summitracing.com/partdetail.asp?part=SUM%2DPUMPKIT7A&FROM=MGand I will be sumping my tank for more an fittings and an hose. with this kit http://store.summitracing.com/partdetail.asp?part=SUM%2DTANKKIT3&FROM=MGAre you going to weld on your gas tank to install that sump? :flame: Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #12 – April 13, 2009, 12:21:08 AM yea cut out the farthest bottom/lowest part of the fuel tank and weld that in. of course the tank has to be completely empty unless you want to have some fun lol Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #13 – April 13, 2009, 06:43:53 AM Quote from: danzajax;267143So many carb-haters on this board. Still, only two people actually answered my original question. Seriously, no one wants to run a carb just for the hell of it? At least Bane isn't bustin' my balls.Dude..I'm not bustin' your balls, just wanted to determine why someone would want to take FI off and replace it with s carby when there are so many cheap FI parts and it's already on there. I was attempting to gauge what you were going to be doing with the car....that is what I would look at for a pending swap. If you had said that you were going to be driving it every day...I would say, well better think that through. If you said weekend...like you did. Why not a carb? if you do not have to invest $600 in a good carb and buy all the stuff to make it work then why not. If you do, leave the EFI on it and get some used hot rod stuff. Put some 19's in it , a stock MAF and re pin the computer. If you want, You can pull the harness out, box it up buy the pig tail and mail it to me. I will repin it for you. It will idle better, start better, run better, be more fuel efficient, be more tree friendly......you see where I am going.Not to stick my finger in the open sore but, it sounds like you already had your mind made up before you asked the question. I stayed FI even after building my T-Bird into a Drag Car...but there have been times that I got fed up with the FI and wanted to go carbed. Aeromotive makes a fuel pressure regulator that will use the stock EFI pump and regulate to a carb pressure. The throttle cable can be had at Late Model restoration. Your AOD will need the detent from a carbed 85 car...hit the JY. There is no need to sump a tank unless you are ripping some serious short times and that can be overcome by filling the tank. Trust me I have a sumped tank and I will be taking it out in June and throwing it away....a fuel cell is the way I should have went from the beginning. Quote Selected
To Carb or not to Carb? Fuel conversion. Reply #14 – April 13, 2009, 10:05:06 AM No, my mind is still not made up. I am enticed by the carb and I am a person who typically goes against the grain. The more people yelled "your a fool!" the more I wanted to do it. I have a set of 19# from the JY I just rebuilt and a HO SD computer. Also, I already swapped a T5 into the car. In reality, I will probably end up going EFI. I love the idea of a MegaSquirt setup and I might still try that. But with my short block sitting on the stand, I picture it being topped off with a big 4bbl, finned valve covers, and chromed pancake. I get nostalgic for my old 84 Camaro (beater rust-bucket that it was). A Holly carb would really give it that nostalgic "Ocho Cilindros" feel.Also, what cars can I swipe a MAF from?So where can I get a cheap GT40 intake? Quote Selected
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