i was wondering if u could help us. we have a 1979 Mustang with a 1969 Boss 302 motor in it. the motor has a offenhauser tunnel ram with dual holley 600 cfm carburetors. we have some questions and didn't know if u could answer them. we got the thing to idle at about 1000 rpms where we wanted it to. then it started to bog down every time the electric fans turned on. it quit doing that but now once we get it to idle where we want it and it stays there when it is warm the next day when ever we warm the motor up it won't idle the same it always dies. we didn't know if u had any idea wat could be causing all this to happen.
I can't imagine why the electric fans would cause the idle to go down unless there is a short somewhere. I haven't messed with the wiring on a 79 Mustang though so I can't honestly help you there. However, ity sounds to me like you may have carb or vacuum related problems if there is no short. You say you have a Boss 302 engine. Are you certain it is a Boss 302? Many people don't know the difference but still think they have one. A real Boss 302 engine is likely worth more than the complete car. They are very rare and very expensive. Can you post a pic of it?
i know this isnt helping your problem, but... real boss 302, boss 302 copy or 302 windsor? for one thing, are the exhaust manifold bolts horizonal or diagonal? diagonal would be a cleveland headed windsor or possably a boss 302.
it is a 302 block that had a hillborn fuel injection system on it then my dad got boss heads and put on it with a tunnel ram. so it is a 302 block with boss 302 heads
It sounds like you need a relay for the fans, make sure you use the proper wire size. As for the other problem, I'm thinking a cracked head.r maybe bad, old, or wrong intake gaskets.
sounds like the fans are drawing a good amount of current causing the alt. to put a load on the motor. the idle mixture is probly right on the edge of keeping the motor running and when the extra load of the alt comes on the motor dies. is the car an auto or manual trans? what the vacuume reading on the motor at idle? what alt is on the car? what type (brand, cfm, amprage draw) of fans are you using?
Two things you need to do. Sell the tunnel ram and carbs, use that money to buy a new Edelbrock Boss 302 intake and a Holley 650 carb. Second, are you running a points ignition ? The fans are drawing too much voltage from the ignition causing that problem.
we fixed the problem with the idle the fuel bowl levels were to low we fixed it and it still bogs down when the fans kick on but still idles good. it is a 1979 with a 1969 boss 302 with a tunnel ram and dual holley 600 cfm carbs. accel electronic distributor and accel super coil don't know wat the alt is. thanks
What in the world could this engine have done to it to need 1200 CFM of carburetion? What are the specs on this engine? Having Boss 302 heads dosen't make this engine a Boss 302.
You're splitting hairs here. It is windsor based due to the outgrowth of the design into the 351W. And based on the fact that the Cleveland foundry cast and built parts for other engine families, then all those engines would also be Clevelands......390 Cleveland, 460 Cleveland, 427 Cleveland, 302 Clevelands. Get the point ?
you'd have to have an old (and bastard) intake to run a tunnel ram on a boss 302... any pics? if nothing else, count the number of bolts in ur valve covers and let us know how many there are
It sounds like a 302 with Cleveland heads. The Boss block is different than any other 302 block and the heads are different than Cleveland heads. Boss 302s are worth a lot of money - the other combination is not.
The Boss blocks have screw in freeze plugs. Quick and easy way to identify. Thats how I found one at a wreckers when I was a teenager. Car was on its side and I spotted the freeze plugs. I swear my heart stopped and the hair on my neck stood up. It was in what was left of a Cougar. Car was almost broke in 2 and barely recognizable. If we only had Ebay back then. That rusted old engine would make a nice auction piece. I sold it in 2 days for a fraction of its worth today. Another one of those "damn I wish I kept it" stories. How about the rotten Cougar? It got squashed. One Eliminator that didnt get restored. Very sad.
