Add 50-100 HP to Explorer 5.0 Motor

[Guest]

[jayh]

it doesnt have to be dual, 3 1/2" single is the same as 2 1/2" dual; 4" single is the same as 3" dual

there is a chart somewhere, but I dont have it offhand

this makes no sense to me me. Maybe I'm missing something?

 one BIG pipe can flow the same as two small pipes. pretty simple 

[Goody_Seven]

it doesnt have to be dual, 3 1/2" single is the same as 2 1/2" dual; 4" single is the same as 3" dual

there is a chart somewhere, but I dont have it offhand

this makes no sense to me me. Maybe I'm missing something?

 one BIG pipe can flow the same as two small pipes. pretty simple 

3.5" single is less area than two 2.5"s?

[351 windsor snake]

" one BIG pipe can flow the same as two small pipes. pretty simple"

Um no,  area of a circle is Pi x(r x r)

3.142 x2x2= 12.568   (4" single)

3.142 x1.5x1.5= 7.069 x2 =14.139  (3 1/2 x 2)

3.142 x 1.75x1.75= 9.622  (3 1/2 single)

3.142 x 1.25x1.25=4.909 x2 =9.81   (2 1/2 x2)

While they are close with the smaller size,you can see they get further apart as they get bigger in diameter.
This is why they use 2 smaller exhaust valves and 2 smaller inlet vales in a four valve head to get more in with less room

[gtvert90]

it doesnt have to be dual, 3 1/2" single is the same as 2 1/2" dual; 4" single is the same as 3" dual

there is a chart somewhere, but I dont have it offhand

this makes no sense to me me. Maybe I'm missing something?

 one BIG pipe can flow the same as two small pipes. pretty simple 

3.5" single is less area than two 2.5"s?

That's what I'm thinking.

[gtvert90]

" one BIG pipe can flow the same as two small pipes. pretty simple"

Um no,  area of a circle is Pi x(r x r)

3.142 x2x2= 12.568   (4" single)

3.142 x1.5x1.5= 7.069 x2 =14.139  (3 1/2 x 2)

3.142 x 1.75x1.75= 9.622  (3 1/2 single)

3.142 x 1.25x1.25=4.909 x2 =9.81   (2 1/2 x2)

While they are close with the smaller size,you can see they get further apart as they get bigger in diameter.
This is why they use 2 smaller exhaust valves and 2 smaller inlet vales in a four valve head to get more in with less room

The smaller sizes are closer then I thought. But still they aren't the same..

And you have to think of the exhaust pulses firing down the same pipe vs two

[jayh]

break it down into centimeters and its a little more accurate

NO they are not identical; my point was if its easier to route a single exhaust due to transfer case, fuel tank etc., its ok as long as the diameter is there to support the volume

for example, he has 2 1/2" single now, anyone care to argue a 3 1/2" single wouldnt flow more?

its close...

[gtvert90]

NO they are not identical; my point was if its easier to route a single exhaust due to transfer case, fuel tank etc., its ok as long as the diameter is there to support the volume

it doesnt have to be dual, 3 1/2" single is the same as 2 1/2" dual; 4" single is the same as 3" dual

I'm sure its easier. But to say 1 3.5" is the same as 2 2.5" is flat wrong. Saying 1 4" is the same as 2 3" is once again wrong. Plus im still wondering what role the exhaust pulses play in it or if its null by then.

for example, he has 2 1/2" single now, anyone care to argue a 3 1/2" single wouldnt flow more?

its close...

That's not what anyone was arguing about. We all you know you love to argue thought

[jayh]

my apologies, I should have said- "close to" or "in the ballpark"

I should have said "debate" not "argue" 

[bronco74]

   sounds like what Iam fixin to do. I got a 74 bronco,c-4 duels intoglasspac's.95 5.0 HO,stock mustang headers, into 3:50 s I know the lift and larger tires stock 225 hp. she could use alot more another 100 hp,so my plan is 350 hp tf 170 w/2" valves comp recommeded x e258hr @533/544 Iam not sure about the 1.6 rollers ,but yea, or 331 bottom I do not want to cut up my stock hood. the 95/system puts the tb on the pass side away from the brake system. m/m said somthing  about a converter??? But still absorbing options, and the ecu is in the glove box covered with a diamond plate dash.  needs to match run with 5.0/ho ecu.    306  tf  170 heads stock ho intake  24lb injectors/newtb/mass ???  is 350hp/ 325flbs of torque  there/???