Hi, I'm thinking seriously about putting headers and 3" true dual exhaust in my 1967 F-100, 352 vin code Y, 2V carb. I would rather find out if theres anything wrong with that before i put any money into the truck. for example, i'm not gonna do any damage to my engine with the exhaust system? i've been told that i might burn my valves too.... need some good helpful advice.....

 

A 3" system is probably a bit large for a 352, IMO a 2 1/4" or 2 1/2" system would be more then adequate for the truck. A 3" system would not hurt the engine at all, with mufflers it will certainly create enough back pressure. With headers and a new exhaust system when you have completed the installation it would be a good plan to screw in a new set of Motorcraft plugs and get a good accurate plug reading after some miles to see if the engine is burning correctly.... Or, any good shop will have an eshaust air/fuel ratio analyzer that will tell you whether your engine is running rich or lean....

 

when you say that 3" would be a bit large, would i be losing performance by going bigger than 2 1/2"? or would it be a lot harder on my engine? I've also been told that I will have to beef up my intake if I'm going to put that exhaust system in?

 

A 2V Carb is 480-500 cfm at the max .

Engines req' some back PSI or reversion occurs.It canl kill low end response & general performance . Most likely it will also affect your engines efficiency in a negative way across the board.

2.25" Dia is too big on a Box Stock 352 or similar 5.7L engine. 2" seems more realistic with an "H" or "X" crossover included ahead of the Mufflers in the exhaust down pipes off the headers or CI Exh manifolds. What I'm saying is BIGGER isn't better necessarily, when it comes to exhaust, tuned is better.

This is just my opinion of course but my 460 is only running 2.25" dia per side. It works great.

FBp

 

I'm with FBP on this, my 428 is running on 2.25" ss exh. That is what my exhaust guy suggested.

 

well im also planning on installing a lot of performance parts in the engine, and i dont want to have to replace the exhaust later on. what would be the best size to go with?

 

2.5" max. And that is adequate for alot of power mods. I would go with 2 1/4 because more torque and just simply better.

 

Yeah, what Pete and Haaser said 2 1/4" or 2 1/2" should be fine. I've run a few 390's, one with aluminum heads and a roller cam, and never went bigger the 2 1/2". The X or H pipe is also an excellent addition to the system. FE's are torque monster engines, 3" pipes IMO would just scrub off some of the torque you spent all the money trying to produce!!!!

 

ok, so 2-1/4" sounds like the best option for me performance-wise. which pipe would be best, H or X? personally i would think X just cuz its straighter and has a clearer path for the exhaust to travel. and what about mufflers? any good suggestions?

 

Your going to do mods later then I would use a X cross, mufflers are a personal choice, what sounds good to me could be crappy to your ears.
I would use 2 1/2".

 

motoxtj
I'd say maybe 2.50" dia with baffled mufflers or 2.25" with low res mufflers & 2.00 with flow throughs like glass pack thrush or whatever. But it will be sluggish with the 2.25 & 2.50 Dia system until you do apply the speed parts, I believe.

You gotta realize adding speed parts, unless they are a stroker crank & bigger pistons will not affect CFM your 352 CID will move, it can't move more than 352 cubic inches per revolution. I don't believe 352 has enough flow to warrant a 2.50" exhaust system & definitely not 3.00" Dia system.

FBp

 

well, I do have plans to completely rebuild the engine from the ground up, and I will be boring it out and putting bigger, flat-top pistons in it, as well as replacing a lot of parts with performance parts.

 

The type of muffler I'd like to install is a Borla Boomer series muffler. does anyone see any downfalls to installing that type of muffler on, lets say, a 2-1/4" exhaust system with headers?

 

good luck getting those headers on there, mine were a bitch

 

When did Ford make a 352 in two stroke?