i am new here so bare with me.
i am putting a 351w in my 90 lx.
whats needed?
1.intake manifold
2.carb
3.what is a good distributer?
-how does that work what is needed?(sense no more computer and all)
-i am really stumped on this one.
4.i should not need to replace fuel lines?
5.as far a fuel pump how does that work?
anything else please open for input
thanks for your help.
There's a lot of left out details, so i'll assume this isn't a straight up race engine and make suggestions based on a typical 351 junkyard engine swap.
1. Wieand Stealth intake. It's a duel plane but it flows nearly as good on the top end as some of the single plane intake, without sacrificing bottom end torque.
2. For a carb i'd probably go with one of Holley's 670 Street Avengers (since i'm guessing you may not know much about carbs....if you do then i'd go with a 650-700cfm double pumper).
3. There's a lot of great distributor options. Some of them are GM/HEI style and have built in ignitions and the coil all right on the disy so you just run a 12v hot wire to it and go...VERY simple but a little more expensive. You could go the cheap route and get a stock '85 302 Duraspark ignition box and an '80s 351W distributor (so long as it was a carbed 351 disy) and wire it up like stock, but that can be a PITA since your car is originally EFI, you'll have to hunt down some wires etc. Personally i'm running an old out of production Mallory Comp 9000 distributor, which has a built in ignition in the distributor so i just wire it up to a coil and go. They do make similar distributors which are all pretty nice...it all just comes down to how much cash you have on this one.
4. I've heard most people say the stock fuel lines are good up to about 400hp before you start starving your engine. I've even heard as little as 300hp, but i'm pretty sure the '95 Cobra R (which was the only late model 'stang to come with a 351W) had the same size fuel lines as every other Mustang clear back to '79. That car was only rated at 300hp, but i'm sure they were both under rated and people built them up to make much more power before they had to switch the lines. This boils down to how racey you get with the engine...i'd say you're plenty safe for now if it's a stock head/cam engine, but it won't take a lot to make 400hp so it may be something to keep in the back of your mind.
5. Again you have a couple options on fuel pumps. First, the "correct" way would be to use a timing chain cover that has provisions for a mechanical pump, and run a mechanical pump. This will require some tinkering with the factory setup though, which you also have a couple options with. 1) you could do it right and swap out the gas tank altogether for a sumped/carburetor ready tank. 2) you can go the ghetto (but effective) route and simply remove the pump from the tank and replace it with a length of hose and put a sock filter on the end of that. Most people say this is dumb but it works quite well. Once you have the tank/sump sorted out you could also run an inline electric fuel pump, but i'm not a big fan of them pesonally so i stick with mechanical pumps. Me personally, i would probably go all out and buy a new tank for an '85 and do it right, and run an aftermarket mechanical pump.
