The original application was for large 4 cylinder and small V-6 application....they have been "bastardized" into tunnel ram service because of their cfm rating, same with guys using two of the 390cfm Vac Secondary because of it's size....the450's actually make terrible TR carbs to tell the truth, if you are using the TR to actually make power. Street poser/street rod cruiser TR carbs at best. They weren't actually designed to be tunnel ram carbs.IIRC, the IFR 's in my list 9776 450 cfm mech sec carbs are " buried" . Since these carbs are marketed as a tunnel ram / dual 4 bbl carb , I'd consider them "performance" ??
Yes , folks who make blanket suppositions & folks who are foolish enough to think their way is the only /best / worthwhile way ........among other thingsSomething in your craw?
Some blocks have the IFR's moved to the bottom of that same channel as a popular upgrade change. Usually on aftermarket blocks.
Eric admitted wrong, then corrected it to an opinion piece yet your still not okay with it?You are right, my thinking is why run a Tunnel Ram if you aren't really going to use it.
Maybe a typo and he meant to type 350 cfm?I was questioning johnsongrass1' last sentence
I'm not qualified enough to take any guesses worth anything but I'd say 2 390's at around 550cfm each are somewhere about 750-800 total. Math ?