best esrimate for hp and tq?

[72maverick]

So I can give some general specs: bore 40 over with dished pistons. 74 block (rebuilt), 69 head (rebuilt, 3 angle valve job, hardened seats), weber 32/36 (adaptor plates), dual snorkel cleaner, pertronix ignition (plugs gap 35), stock cam, rebuilt c4 transmission, 1.5 non adjustable rockers. Pretty much stock for the rest. Not sure or CR. Just curious of what it could be making over stock. Thanks!

 

[First Fox]

This sounds like a pretty stock rebuild. The only upgrade you seem to have is the Weber, and using the adapter instead of the direct mount is good for something in the neighborhood of 5 horsepower.

If this is a 250, I would guess the horsepower to be around 80 ish at the wheels. A few less if it is a 200.

 

[72maverick]

It is the 200. I wasn't expecting much. Just curious. It does feel a whole lot better than it did before.

 

[powerband]

With fresh stock build , your specs should be close to OEM. The Weber is a real advantage for driveability , adding some the power the six has available. The small block six engines were squeezed for economy for the consumer - but first for Ford... . A little un-squeezing with a nice carb and simple mods add up.

for daily driving I run a C9 170 with simple mods : stock cam, un-squeezed D7 head (kudos Schehdal bros) [sp :roll: ] HW 2bbl, and overdrive tranny (T5). enable comfortable interstate cruise speeds - T5 gears and OEM 3.50:1 rear lets torquey 170 tractor engine wake up.

have fun
8)

 

[72maverick]

After break in... I will have fun
The only thing I plan for this engine is some high ratio rockers. For my spare block I have plenty more planned for a fun engine

 

[rbohm]

8) flywheel hp should be around 90-95, stock they made about 88hp net.

 

[First Fox]

8) flywheel hp should be around 90-95, stock they made about 88hp net.

This is true. However if you are interested in projecting an accurate 1/4 mile time, you will want to use horsepower at the wheel for the calculation. If you want to bench race, then yes, use the flywheel number.

 

[72maverick]

Stull better than before the rebuild

 

[chad]

"Dual snorkel air cleaner"

I see a few of these now, what's the advantage, theory, what-have-you? y not just 1 bigger-than-stock?
Thanx!

 

[72maverick]

I wouldn't say much. My uncle stands by his with more power and better gas mileage. For me, I like the look and love the sound

 

[chad]

"...what's the advantage, theory...?"

"My uncle stands by his with more power and better gas mileage."
OK, thanks - that's the 'advantage' question. Got anything on the theory...?
Seems 1 would be enuff, esp if set up like the "cold air intakes" we see on the modern engines.

Look and sound are advantages but more personal ie not everyone judges things to the same benifit (look at musical tastes [sound] and hair styles [looks])
8^0

BTW: I DO like that "fined carb hat" esp on 'our' sm sixes.

 

[72maverick]

I don't know much on theory or if dual is better than single. I would imagine a single true cold air set up would be more effective. Maybe the dual snorkels just allow more air and from different areas...? Maybe helps with turbulence of some sort? I am just guessing here. Maybe somebody will have an actual answer (I would love to know as well).

 

[chad]

"(I would love to know as well)"

Alright, good. I wuz beginin to feel a lill sheepishly.
Let's see...

Thanks again

"more effective."
not sure, but the larger-than-stock (those snorkles were smaller than my elementary school plastic fluteaphone) area sure aids A/F flow...

 

[72maverick]

Let me know if you figure anything out. I just went for looks ha.

 

[chad]

U got that & performance 2 , I'm pretty sure, brother.
I've heard that's the easiest way 2 get it. 2 - 5 Hp I think...

I wuz sheepish due to findin out I WAS NOT on PM & felt I wuz jackin another thread. But it's yourn & seems OK w/ you...
Again, lets C what the more knowledgable say if stoppin by
(on both Qs: hp & "double snorkles").

 

[72maverick]

No need to worry about it. I wouldn't mind knowing how much each up grade increased HP and TQ (if any). I know in the performance hand book it says about 1 HP for every 10 degrees colder. I know the exhaust manifold gets pretty hot and the snorkels get it to the other side of the engine. So I would assume there is some HP gain there. Don't know if it's noticeable (seat of the pants noticeable).