A question for the 300 guru's
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 444
Likes: 0
From: Cleveland
A question for the 300 guru's
Hello Everyone,
Ok, I got a Offy 4 barrel intake for nothing. I don't want to change the intake without helping out the exhaust...but I worry that if I put headers on or the dual Ford manifolds that I will lose some of the drivability from not having the stock "stacked" intake and exhaust manifolds. Is this something that I should worry about? I don't want the truck to act "cold-blooded" from not having the stacked manifolds. Thanks everyone!!!!!!!!
Lenny
Ok, I got a Offy 4 barrel intake for nothing. I don't want to change the intake without helping out the exhaust...but I worry that if I put headers on or the dual Ford manifolds that I will lose some of the drivability from not having the stock "stacked" intake and exhaust manifolds. Is this something that I should worry about? I don't want the truck to act "cold-blooded" from not having the stacked manifolds. Thanks everyone!!!!!!!!
Lenny
Laughing Gas
Joined: Jun 2003
Posts: 1,218
Likes: 2
From: Parkville, MO (KC)
Carb icing is the major disaster that can occur with removing the heat riser. Cleveland would be a risk for that I'd think (cool, around 32 deg, high humidity situation). Hot summer and cold winter conditions are oK, its the relationship to temp and humidly that gets carb icing going.
Three solutions:
1) heated carb plate -- water from heater take off on water pump though a little plate under the carb -- get one at junk yard or ebay, approx $25
2) Fashion a plate to block off bottom of offy intake and run water through it. Free, but you have to have metal working equipent.
3) Get one of those air cleaners with a heat duct, fashion a shroud around the exhaust manifold, and run a heated air tube up to the air cleaner. IMHO kind of rinky dink.
Hope this helps.
Three solutions:
1) heated carb plate -- water from heater take off on water pump though a little plate under the carb -- get one at junk yard or ebay, approx $25
2) Fashion a plate to block off bottom of offy intake and run water through it. Free, but you have to have metal working equipent.
3) Get one of those air cleaners with a heat duct, fashion a shroud around the exhaust manifold, and run a heated air tube up to the air cleaner. IMHO kind of rinky dink.
Hope this helps.
Laughing Gas
Joined: Jun 2003
Posts: 1,218
Likes: 2
From: Parkville, MO (KC)
The other problem, as far as I can see, with the heated air option, is that it increases the temp of your air into the carb ALL THE TIME. Yes, there is a temp actuated flapper that goes to cold air when the engine is warmed up -- but the flapper (at least the stock one) moves at 110 deg. It keeps the air mix at 110 degrees into the carb by varying the ratio of cold and hot. Like driving in hot weather all the time. All the effort that new cars and performance upgrades put into getting cold air into the carb, and then we go and put hot air in on purpose. Not intellectually pleasing in my mind.
The heated spacer option seems best to me -- or just go for it and see what you get. Carb icing isn't dangerous, so far as I know. Worst case scenario -- you have to pull over and wait for a thaw, which happens in a few minutes cause all the heat rising off the block helps. Remember -- they ice up in cool damp conditions, becuase the cold generated by the vaporizing gas lowers the temp of the carb under freezing, and the ambient humidity is such that it starts to condense on the carb and freeze.
The heated spacer option seems best to me -- or just go for it and see what you get. Carb icing isn't dangerous, so far as I know. Worst case scenario -- you have to pull over and wait for a thaw, which happens in a few minutes cause all the heat rising off the block helps. Remember -- they ice up in cool damp conditions, becuase the cold generated by the vaporizing gas lowers the temp of the carb under freezing, and the ambient humidity is such that it starts to condense on the carb and freeze.
Thread Starter
|
Senior User
Joined: Nov 2001
Posts: 444
Likes: 0
From: Cleveland
Well, my truck is just a summer toy. I probably won't see extended time in temps under 40 F.
So if I put the 4 barrel carb manifold (with an approx. 390 cfm carb) on and the dual split factory exhaust manifolds on, I shouldn't have any problems? Or are there any other suggestions.
Thanks for all the help and ideas guys!!!!!!
Lenny
Check out my gallery!
So if I put the 4 barrel carb manifold (with an approx. 390 cfm carb) on and the dual split factory exhaust manifolds on, I shouldn't have any problems? Or are there any other suggestions.
Thanks for all the help and ideas guys!!!!!!
Lenny
Check out my gallery!
