Well, I am playing me some online poker, and seem to have stumbled across the key to actually winning, so I am up about 150$ at the moment, hopefully 250 soon. My next part for the truck is going to be a larger throttle body. Now I know that ones from a 351 will bolt up, but I was browsing my old favorites, and it turns out that 351 and 460 TBs are the same too? Well I found a stock TB on ebay with a listed bore that converted to approx 55-56MM. There is one that is a big bore, 61mm stacks. I bet that they are close to 10 MM over the stock size of the 300.
I was wondering if anyone can forsee any problems with this (IE overfeeding the motor and going lean under normal closed loop operation). If this problem does arise, I think it may be one of the few that an adjustable FPR will be able to cure without the computer knowing. It will see the same throttle postion or watever speed density uses) and use the same injector duty cycle, with just a slight amount more air fuel being added compensating for the increase in air.

I might be opting for some type of engine management here in the next few months. I really wanna do some radical stuff (nitrous ontop of this mod along with maybe some headers, and I would like to get the full effect out of my motor without letting the stock computer even try to make it all work). And besides, it will be the base for a turbo motor later right?

Trucks a 93 f-150 flareside 4.9L m5od dual high flow cone filters, flowmaster cat back, and a 3300cfm electric fan. If I had the means and the time, it would have a 272 duration cam too!!!

 

silverstreak did some stuff with a larger TB (i think it was him) and found no significant gains. seems the larger TB just allows the engine to intake more air at less given throttle so at 1/2 throttle with the stock TB is taking in as much as as a larger TB at 1/3 and then it just flatlines. i know this is how a larger TB is supposed to work but the engine needs more work done to the other breathing aspects...IE head and cam before it will need more air from a larger TB.

u may see a little more get up off the line but i read anymore than 2/3 throttle and it falls flat instead of picking up a little more with the stock one. u will also need to port match the intake and find out a way to bypass the coolant lines and mount up the IAC...

this link is for mounting a 460 TB on a 300 if ur sitll interested.
https://www.ford-trucks.com/forums/s...hreadid=132663

 

I don't see that a larger TB will help produce more power without other changes to the engine. You need to work on getting the engine to breath better first.

JMO