¯\_(ツ)_/¯ wrote:
volvoclearinghouse wrote:
The answer is, almost as much power as the stock 454 in my '93 K3500 with TBI. 
Oh boo-hoo, some of us have to move a whole RV with that garbage! 
How big of an RV? My K3500 is a dually, 6 wheel drive, crew cab. Tips the scales empty around 8000 pounds. And it's usually got a bed full of stuff or a car hauler behind it, or both.
I used to have a Dodge 12V Cummins in a club cab 4x4 truck, also bone stock. It made less HP (160 vs 230) but a bit more torque (400 vs 385). The two trucks would lose a drag race to each other.
In reply to volvoclearinghouse:
Big. 31ft, 12k lbs (claimed, I call bullE36 M3 on the manufacturer) empty and REALLY heavy with fluids and everything onboard- it would lose a drag race to your current truck towing your old truck!
In reply to ¯_(ツ)_/¯:
Bet it would beat SanFord. 
We need a slowest truck competition. 
Didn't Stampie already do that?
Does somebody here have a Unimog? I think those were available with a crawl ratio that puts the low gear into the single digits on feet/minute so that guy would probably win.
This is the kind of thread that spawns legendary Youtube videos. Get on that.
In reply to ¯_(ツ)_/¯:
Low range in the rear end of SanFord is 8.9:1
First on a T98 transmission is 6.4:1
If I'm figuring this correctly, that gives me a total ratio of 56.96:1
I think the idle speed on the 361 could get down under 500 rpms under load, but we'll figure this at 500.
That gives me 8.77 rpm on the rear axle and I have a tire circumference of 114.84".
8.77 * 114.84 = 1007.14 inches per minute or, 83.92' per minute and 5035.7' per hour.
For a total minimum speed of .953 mph.
Unfortunately, my top speed is correspondingly slow.
Sorry for the thread jack. Back to your regularly scheduled programming. 
GameboyRMH wrote:
Knurled wrote:
The linkage requirements would be so awful that I'd almost think it'd be EASIER to run them drive by wire. With some sort of momentary-on popper solenoid. Throtte control is how many carburetors are at WOT.
This is sillier than my idea for a "Big Bang" V8 engine, where all cylinders on the right bank fire, then 90 degrees later all cylinders in the left bank fire, then 630 degrees of dead time. I'm not sure what would be worse, the vertical shaking, the torque spike at the flywheel, or the cam drive "harmonics". Getting the firing order correct would be easy at least.
I bet the linkage could be done mechanically. Design would be tricky but certainly not impossible. Fabrication shouldn't be hard.
I wonder what a big bang crossplane V8 would sound like, considering that a big bang I4 sounds kind of like a crossplane V8.
Yep, just interlink them like on this vintage (late 60s, early 70s) kart.
In reply to Knurled:
Just wanted to say thanks for sharing. Our Facebook followers got a real kick out of it!
Ed Higginbotham wrote:
In reply to Knurled:
Just wanted to say thanks for sharing. Our Facebook followers got a real kick out of it!
Erk. Now I feel REALLY bad about linking the story without proper attribution.
It came up in this thread on Speedtalk in a thread about oil filtration.
In reply to Toyman01:
OK, I'll play...
My K3500 has a 4.11 rear, and a 6.34 1rst gear (early NV4500) and a 2.7 low range in the transfer case. Multiply all that together and I get a 70.355 (rounded) deep low gear.
Tires are 235/85R16. C = 99.68"
Assuming a 500 RPM idle on the 454, that's 7.11 RPM at the rear axle, 7.11 * 99.68 = 708.4 IPM, 59.03 FPM or 3542 FPH, or approximately 2/3 of an MPH.
I lose/win!
What was the power output on the single carb?
60 hp * 8 cylinders = 480 hp.
Cheap ITB setup!!!!!
FlightService wrote:
60 hp * 8 cylinders = 480 hp.
Cheap ITB setup!!!!!
8 on a manifold with a common plenum will be able to make that power. As ITBs, not anywhere close (because each carb is only flowing part of the time, so it won't be able to flow 60hp worth). It was explained in more detail somewhere further up in the thread.
In reply to rslifkin:
You Lie Stay Off of My Cloud!!!!
rslifkin wrote:
FlightService wrote:
60 hp * 8 cylinders = 480 hp.
Cheap ITB setup!!!!!
8 on a manifold with a common plenum will be able to make that power. As ITBs, not anywhere close (because each carb is only flowing part of the time, so it won't be able to flow 60hp worth). It was explained in more detail somewhere further up in the thread.
An old trick on 4-barrel RX-7s when they had to use a stock carb but manifold was free. The stock manifolding is more or less an ITB setup, each rotor has its own primary and secondary bore and that is it. If you cut the manifold down to have a plenum, you could get more airflow than a Weber 48 IDA, since each rotor could see all four barrels. You have to completely recalibrate the carb (much smaller air bleeds and some other changes) but that's just fueling.
More infos: A Holley 750 has 42mm throttle bores. To feed a V8 with ITBs to the same level as you can feed it with one 750 on a plenum, you need something like 52-55mm throttles.
The trick is, the throttles on a plenum have to be enough to feed the whole engine over an average period of time, while ITBs have to be able to flow enough for each individual port's peak flow, which is much higher than average flow while the valve is open, and the valve is only open 1/3rd of the time. (But they sound SOOOO GOOOD when you whack them open at a speed low enough where intake drone is louder than the exhaust)
