engine building January 17, 2011, 09:10:20 AM I have the opportunity to pick up a ho 302 from a 92 stang, i want to convert it to carbed to put it in the cougar. Im looking at an edelbrock carb, would 500cfm carb be enough or would a 600 one be better? I am looking on keeping everthing pretty well stock except gt40 heads if they will fit (any insight as to if they will fit with carbs?) also, I understand I will have to change the distributor and fuel pump? Any recomendation on fuel pump? I plan on building the engine over the winter/spring and then doing a t-5 swap before i drop in the 302.Thanks for any answers Quote Selected
engine building Reply #1 – January 17, 2011, 12:18:25 PM I'm pretty sure you're gonna want at least a 155lph fuel pump for the swap...here's a ton of info: http://www.coolcats.net/tech/advanced/ho_transplant.html Quote Selected
engine building Reply #2 – January 17, 2011, 04:03:18 PM Thanks for the link, I read that page a couple times but it more so is about the swap, and using the computer set-up. I am pretty comfortable with the swap itself its more building the carbed engine and what is compatable with what that im not to sure about.ThanksEric Quote Selected
engine building Reply #3 – January 17, 2011, 08:47:35 PM If you have the time I would do an EFI swap. The drive-ability would be better. Yes it will cost more but the car would be more fun to drive and easier to keep in tune. Quote Selected
engine building Reply #4 – January 17, 2011, 09:12:23 PM Quote from: thunderjet302;350007If you have the time I would do an EFI swap. The drive-ability would be better. Yes it will cost more but the car would be more fun to drive and easier to keep in tune. I'd expect a swift and aggressive response from the pro-carb people for that... Quote Selected
engine building Reply #5 – January 18, 2011, 06:49:54 PM No offence to the pro efi crowd but the idea of not having to deal with computers and sensor nonscence kind of gives me a hard on Quote Selected
engine building Reply #6 – January 18, 2011, 07:58:57 PM Each to his own. I am not sure how well a carb'd setup would work for me. I like getting close to 30mpg on the freeways while going from 4000ft elevation up to 10000ft. But it would be much cheaper and easier to do it carbed.You would need to get rid of or regulate the stock fuel pump to like 6 psi, depending on what carb you get.I have heard its just as simple as gutting the wiring/computer, and just wiring up the ignition.Here is my take on this write up.http://www.allfordmustangs.com/forums/5-0l-tech/135024-efi-carb-conversion.htmlBasically, get a 85 mustang gt distributor, either regulate the EFI lines to 6psi, or run a mechanical pump. swap intake and carb on and have fun. You will need a specific mount to link the AOD linkage up.Let us know how it goes. Quote Selected
engine building Reply #8 – January 19, 2011, 08:16:17 PM If you're going with a carb., I would go with the 600 cfm carb. Quote Selected
engine building Reply #9 – January 20, 2011, 09:56:05 AM Easy swap to do.I would go with 600 edelbrock carb and RPM intake or something along that style.I would not swap the heads for now and just work on getting it running.You can get a used MSD dis and box cheap as well as other brands but i run MSD setup's on all mo car's so i side that way.Fuel pump a Holly Blue will work fine or even a Red will work. Quote Selected
engine building Reply #10 – January 20, 2011, 02:46:34 PM I would run a Holley based carb but that is because I have had nothing but issues out of two Edelbrock carbs. They both were sold and a Holley and a Street Demon were bought and my life was much better. That is all personal taste so I will leave it there. I would definitely go with a 600+ CFM carb as that will also give you some growing room if (and they will) things change.http://www.holley.com/0-81670.asphttp://www.barrygrant.com/demon/default.aspx?page=9Both of the carbs I listed above have kick down linkages for Ford transmissions. Call them and they will give you all the info on them if you are going to run the auto tranny for a little while before you do the T-5 swap. As said above go with the Holley electric red pump. Already regulated at 7 psi and they are about bullet proof. I would also recommend a prefilter upstream of the pump to keep the debris out of the carb.As for distributors, I would have to say MSD all the way on this one. They suck on the EFI setups (its the MSD electronics in the dizzy that are garbage, replace with Ford electronics and they are unbeatable) but on a carb setup with a Digital 6 or tried and true 6AL ignition box they are super reliable and parts are everywhere.As for the GT40 heads, get them and take them to a good shop and have them set up with good springs (gotta know the cam specs), keepers, and retainers. Also have them run the valves even if the person before you swears up and down the heads are fresh, its cheap insurance. If the valves are good then the charge to check them out will be next to nothing as they will already have the heads torn down.Here is the part that is all me so take it with a grain of salt...pull the stock cam and toss it in the recycle bin. Call Comp Cams and tell the cam guru what your setup is and have them recommend a cam and intake for the heads, carb, and a stock Mustang short block. Be sure to mention it is a 92 Mustang short block as that will let them know what the pistons have as far as valve reliefs. Also know what rear gears you are going to run and that it will be a T-5 car as they will ask. Remember that the cam profile will also directly determine the springs you want to put on the heads and it will also determine the setup on the springs. The stock roller lifters will be fine to reuse on the new cam but inspect them first.It may sound like a lot but you can put a really nice carb, intake, and iginition on a stock 92 long block and it will not do much more than the injected setup as the cam is what controls the whole can of beans. Spend your money wisely and do the head swap now as it will only cost more $$$ to do it later and if you are like any other car person its never enough.Darren Quote Selected
engine building Reply #11 – January 20, 2011, 08:53:46 PM Holly Blue Maximum pressure is 14 PSI and you need pressure regulatorRed pump is the 7 PSI one.As for MSD electronics they work fine. Quote Selected
engine building Reply #12 – January 20, 2011, 10:17:36 PM I have not ran a Holley pump in years so my memory was a bit rusty. A red pump is more than adequate for the amount of HP a person can tweak out of a 302.Go here and read under "Fuel Requirements". I thought that was some good tech data and I saved the article.http://www.holley.com/data/Products/Technical/Fuel%20Pump%20Tech%20Info.pdfDarren Quote Selected
engine building Reply #13 – January 20, 2011, 11:09:28 PM I'm running a holly blue on my BB right now.I use to have the SS aeromotive pump till it started to liquid cool itself with fuel. Quote Selected
engine building Reply #14 – January 20, 2011, 11:29:37 PM Quote from: cugrhntr;350115No offence to the pro efi crowd but the idea of not having to deal with computers and sensor nonscence kind of gives me a hard on So then you LIKE EFI?!! LOL.Seriously though while it IS your car and you can do as you wish I merely want to point out that the EFI system in these cars is really not all that complicated. An OEM 5.0 HO processor (whether SD or Mass Air) will cover the needs/wants of 99% of 5.0 people that have EFI. Quote Selected
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