Intake Installation

Hey all:

I have a 1987 Bronco, 351 Windsor c6 no overdrive tranny. I just got rid of the holley carb and stock cast iron manifold, replaced it with the edelbrock performer series manifold and 1406 carb. I got the manifold in no problem, (also has no EGR). I'm having problems figuring out what parts that were bolted on to the manifold I need to replace, some were EGR from before. There is one that screws in right to the manifold above the thermostat housing/water outlet, the one on the stock manifold had some sort of coolant pipe with a vacuum outlet on top of it. There is another hole in the manifold on the drivers side front of the manifold where i think the temperature sending unit goes. Last is one more hole back side of the manifold behind the carb, centered. Can I plug this one up or is there something that goes there, my old manifold had nothing in that place. As for the carb, I'm just curious how to hook up the throttle linkage and kickdown linkage. I'm pretty sure there is a kit edelbrock makes, but I want to make sure I get one that adapts both cables. I appreciate any help here, I know I'm being broad, but I've really search other topics and couldn't find anything pertaining to the manifold bolt ons. I'll post pictures if they are needed.

Thanks

I put the same intake on my 84 Bronco 351W **, and remember a few things. First, the stock manifold had a ported vacuum switch right in front of the carb, which was plastic and easily broken from contact with the air cleaner lid. It looks like a ****** fitting with 3 or 4 vacuum outlets. There was also one behind the carb on the stock manifold, which was absent on the Edelbrock. I sacrificed the cruise control which was formerly hooked to this fitting. I may be able to look at the Edelbrock manifold i still have in the shop, but believe I only use one vacuum line to the dizzy (vacuum advance) and one to the carb. The resr of the lines went to the emissions which I cleaned up or plugged. I can't advise you on which lines to plug/ disconnect, but you can figure it out from a vacuum diagram or tracing the old lines to their individual parts. As for the carb, I kept the original reman 4bbl Holley. But in your case, you will need a kit for the C6 kickdown rod and linkage. I just bought one from Summit for my Hollet TA on the 460. You only need a bracket to hold the throttle cable from the gas pedal, and a kit to engage the kickdown rod in passing gear. JSM84

Thanks JSM84, I took some of that advice and rigged some stuff up. I'm still going through and taking out unnecessary vacuum lines. I put that ported vacum switch in the back, and ran one to the cruise control, and the other to some place in the dash. I'm not sure how its gonna work out yet, I'm waiting on a bypass hose to complete this rig. Once I get it started I'll make adjustments, but right now I'm just trying to get it started up and running. I also got the 1483 kit from edelbrock, and ghetto rigged it for now, but the throttle works fine as well. Thanks again for your help!

Just a little side note, but I think it's worth looking into and wish i had done it. In the Tech Articles forum, I posted a link to modifying the rear water passages so they cross over the back of the intake. The reason my 351W ** blew up was due to the intake manifold gasket leaking a bit of coolant into the back cylinders on either side of the block, basically hydro-locking the engine and bending the connecting rods. When I pulled the intake, the rear cavities in the intake and the water passages in the block were stopped up with crud, like calcium build-up. The engine only had 20K miles on it in 3 years, and regular coolant/water change.

http://broncozone.com/forums/index.php?showtopic=13770

I was hoping to start this thread again with some pictures. If anybody has some time to look over them and help me find out where certain vacuum lines need to go. I'm a little confused of the port behind the carb. Also, I'm not quite sure what is and isn't needed, and where I need to connect the lines on the carb. Any help would be appreciated.

In the first picture, you have the line for the PCV valve hooked up to the carb. At the bottom-right of the pic, behind the dizzy, is a metal tube coming out of the intake manifold. The tube is hooked to a rubber hose, and that hose should go to your PCV valve on the passngr-side valve cover. You can just see the PCV valve in the top-left of the pic, and it's hooked up to the carb.

In the second pic, I see the PCV valve hooked up to the carb in front-center. Connect that hose from the metal line to the PCV valve.

Connect that hose from the front-center of the carb to your vacuum tree/ ported fitting in the rear of the carb. IF you have vaccum advance on the dizzy, hook that up to the center port on the carb. I have my Holley TA hooked that way, but it's to an HEI dizzy.

You might want to take a look through this link. http://www.edelbrock.com/automotive_new/mi...l/1000/1406.pdf

I'm pretty sure that metal tube is my fuel line. I think its something else I'm doing wrong.

If you're certain that the metal line is from your fuel pump ,then that's OK. Where do you have the other vacuum lines hooked up? That would be the two smaller lines from the carb, and the big one off the front of the intake. Can't tell if the dizzy has a vacuum advance or not, does it?

The big one in the middle I have going to my PCV valve, I picked that up from the instructions. The distributor has some type of vacuum line that I have going to the smaller passenger side outlet on the carb. The other small outlet goes to my transmission, these two smaller ones are where I think I may be doing something wrong. Also there is an outlet on the rear of the manifold that you can just see in the pictures, I'm not sure if I have that hooked up right either.

I still think you should try running a hose from the center-front port to your dizzy vacuum advance. The big hose can run to your PCV valve. The C6 modulator line should come off of the tree/ported fitting on the back. My intake only had one port, but if you have another one not being used, I'd plug it.

Alright, so now I have everything in place and hooked up the right way, to my best knowledge. I put the intake manifold in only using RTV Black, it fit in pretty nice. However, now that everything is hooked up I'm still having some issues. Before when I had put this all together I started it up and it reved real high to like 2000 and then stalled out. Now, it starts off at 1200 RPM's and then revs up again to about 1900-2000 RPMs, but it doesn't stall. I only let it run for like 5 seconds because I didn't want to chance any wear and tear in the block due to lack of oil. I don't know if this is another vacuum problem, faulty installation problem, carb problem or a combination of the few. If anybody could offer some advice I would definately take it, and I'd love to post any neccessary pictures or info that may help.

Thanks, and hopefully somebody will read this once again

I've been doing a little work on my 1987 351w Bronco, with a c-6 tranny in it. I put a new intake manifold and carb (electric choke) on it, both performer series from Edelbrock, non EGR. I put them in a while ago and had problems idleing. I would start it up and it would rev really high, around 2000 RPMS, and then it would stall out. I figured I had a bad leak in the manifold from faulty installation, so I took it off, cleaned it up real nice and put it in again, this time only using RTV black. Now when I start it up it still idles really high, increasing to about 2,000 RPMs again, but it doesn't have signs of stalling (I wouldn't let it run longer than 5 seconds because I don't want to risk any major issues). I don't know if this is because of another leak from installation, or a vacuum misfitting/problem, or maybe a carb tuning problem. It could be something else all together or a combination of some of the above. I could really use some guidance in where to start or what the problem could be. If not I'm looking at taking it to somebody, buts its not an issue where I can just drive it over to a mechanic, so I'd rather get this done myself of course with the help of some of you.

are you sure you got the dist. set back in the right place it could be advanced or you could have a vacuum leak somewhere else. if the carb was new it should be adjusted pretty much right you might also ck. the throttle linkage and see if it is holding it open.