efi vs. carb block
 

sorry about asking this question because im positive it has been answered before. Just that i couldnt find it.

So is there a difference between the efi and carb 460 blocks?

I have a 460 out of a 97 f250 and was just curious; if need be could i rip the block out retrofit it and slam dunk it into a older ford.

Thank you for putting up with me, and answering my questions once again.

no difference in blocks. the efi block and carb block are the same. should be a D9TE block.

the difference is in the heads, intake and exhaust manifolds. must be swapped as a package. the efi heads won't work with a carb intake and vice versa.

just be aware that the 79 and newer blocks are externally balanced while the older engines are internally balanced. so you have to use the correct flexplate or flywheel for the balance.

rgds
Mike

alright thank you. I was thinking they were the same blocks but had to double check. thanks again

So if the blocks are the same would a efi block be safe with 600hp or would that be pushing it?

hi, i thought it was mentioned somewhere else here that the efi blocks had longer bores? does that mean they are extended down below into the bottom? not a higher deck height, correct? thanks, matt

yes the cylinder walls are longer on the D9TE blocks (the standard block used from 79 and newer and on all efi motors). that is why they are externally balanced as the crank weights had to be cut down to fit. as such the older cranks will not fit in the newer blocks without a lot of grinding of the walls for clearance.

they are very good blocks and are the major choice for stroker motors due to their longer cylinder walls. 600hp is not even breaking a sweat to one of these blocks. they can safely take up to around 800hp naturally aspirated , higher if you add 4 bolt caps, add block hardener to the water passages, etc. i have read some guys are pushing over 1000hp with the stock blocks and major block prep work. its when you start getting into supercharging and nitrous applications that the stock blocks start to fall short.

rgds
Mike

thanks again, thats good to know.

I was origanly planing on supercharging it when i turn it into a carbed engine. But nothing crazy with the boost, no more than at maximum 14lbs and realisticly probably only 8-10.

But if they make such good strokers i might just turn it into a 520, maybe even a little bigger. But it would be going into a weekend street rod so im thinking the 520 area is about as large as i want to go. Well once again thanks