Gary Lewis Posted December 11, 2019 Share Posted December 11, 2019 Im trying to figure out what the advantage if any would be to use their 2 barrel TBI. For the same cost, you can get the 4 barrel. They dont list cfm ratings. So looking at either system in terms of air velocity isnt possible. Im thinking this one is a good practical model. Its not capable of boost, but I think realistically, Ill never boost the blue truck. I don’t know why one would be better than the other. Either would use a single mass air flow meter so it shouldn’t make a difference. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 I don’t know why one would be better than the other. Either would use a single mass air flow meter so it shouldn’t make a difference. Maybe I should call and ask them. However, if I did the 2 barrel, I would need a carb adapter. So, that is another purchase. There has been a lot of talk about intake air velocity. Would be nice to hear from fitech if they have recommend one over the other for the 300. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 I don’t know why one would be better than the other. Either would use a single mass air flow meter so it shouldn’t make a difference. Maybe I should call and ask them. However, if I did the 2 barrel, I would need a carb adapter. So, that is another purchase. There has been a lot of talk about intake air velocity. Would be nice to hear from fitech if they have recommend one over the other for the 300. This is from Offenhausers 1981 catalogue. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 This is from Offenhausers 1981 catalogue. Next question will be Throttle body heat. With headers and an offy intake, should I install an engine coolant heat plate under a fitech TB? I think the biggest issue with no heat is fuel not atomizing and sticking to the inside of the manifold causing stumbling/hesitation. I think I will run without a heat plate and see how it does. It may become extremely obvious if I need one. If I have poor fuel mileage, a heat plate would assist that also. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 Next question will be Throttle body heat. With headers and an offy intake, should I install an engine coolant heat plate under a fitech TB? I think the biggest issue with no heat is fuel not atomizing and sticking to the inside of the manifold causing stumbling/hesitation. I think I will run without a heat plate and see how it does. It may become extremely obvious if I need one. If I have poor fuel mileage, a heat plate would assist that also. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 I guess that answers that. Link to comment Share on other sites More sharing options...
ArdWrknTrk Posted December 11, 2019 Share Posted December 11, 2019 I guess that answers that. Kinda. With TBI and long exposed aluminum runners like that there's bound to be some condensation in cold weather. Thermodynamics and the behavior of vapor don't go out the window no matter how finely atomized the fuel mixture is. It it were port injection I would agree with the above. Link to comment Share on other sites More sharing options...
Frank Wyatt Posted December 11, 2019 Share Posted December 11, 2019 Kinda. With TBI and long exposed aluminum runners like that there's bound to be some condensation in cold weather. Thermodynamics and the behavior of vapor don't go out the window no matter how finely atomized the fuel mixture is. It it were port injection I would agree with the above. TBI injection, no matter who makes it, is just an electronic version of the carburetor. However, with a O2 sensor, MAP sensor and an ACT sensor it does have more inputs giving it a more refined ability to self adjust to the conditions. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 Kinda. With TBI and long exposed aluminum runners like that there's bound to be some condensation in cold weather. Thermodynamics and the behavior of vapor don't go out the window no matter how finely atomized the fuel mixture is. It it were port injection I would agree with the above. Point taken. The proof is in the puddin as they say. I will run it without first. If its obvious that I will need something, I will do it. Link to comment Share on other sites More sharing options...
Ray Cecil Posted December 11, 2019 Author Share Posted December 11, 2019 Kinda. With TBI and long exposed aluminum runners like that there's bound to be some condensation in cold weather. Thermodynamics and the behavior of vapor don't go out the window no matter how finely atomized the fuel mixture is. It it were port injection I would agree with the above. Point taken. The proof is in the puddin as they say. I will run it without first. If its obvious that I will need something, I will do it. It would be cool to put a carb heat plate coolant circuit on a ball valve. Run a cable to control carb heat to the dash, like they do in aircraft. It would be cool to be able to adjust timing from the cab too. Link to comment Share on other sites More sharing options...
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