I want to re place my 2 barrel intake and carb (autolite 2100) and replace it with a 4 bbl intake.
1) are all the intake venturi holes the same diameter and if so what carb would be the best for this application? I want to use the vehicle as a daily driver for the time being.
Typically Ford used square-bore 4v on the 289, 302, and 351W. The spreadbore showed up on the 351C in 71. If you stick with the rest of the engine as stock, use a 4100 Autolite 1.08 size.
if its stock a weiand 8124 intake and a road demon 525-625 vac sec carb or an edelbrock 500-600 carb, you will get the most hp with the demon but siplicity with the edelbrock.
2+2 GT Thanks, I feel like I am asking basic questions that I should know but until recently have been out of the Mustang loop. If I can't find a 1.08 can I settle for a 1.12?
2+2 GT Thanks, I feel like I am asking basic questions that I should know but until recently have been out of the Mustang loop. If I can't find a 1.08 can I settle for a 1.12?
It is yes if it is the mustang carb, the 1.12 intended for a small block.
It is a NO! if it is the emissions friendly carb intended for big blocks.
Some will claim it doesn't matter and other will claim the big block carb just won't run right.
I choose to stay away from the 1.12 and eventually lucked out on buying an engine that was taken apart but included the correct carb and a few other useful parts for me.
If you are using the stock cam you are better off with the 1.08. If you upgrade the cam, then a 1.12 is in order, but as mentioned, it must be recalibrated for the 289 engine.
I hope you're not the one who bought that iron 289 4 bbl intake on ebay last week for $200 that the guy listed as a 289 Hi-po unit. If you were then you paid about $150 too much for it. Just me, but a better carb for it would be a Holley 570 SA.