4.0 OHV vs 4.0I6HO
#51
03-03-2009
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#52
03-03-2009
#53
03-03-2009
ho ho ho.. I know when it started for me. When your first child looks up with those puppy dog eyes and tells you want they want santa to bring them.
#54
03-03-2009
Actually.. there are three different kinds of dynos commonly used for cars/trucks and engines. Most of them *don't* actually measure the torque. They calculate it. (like dynojet)
When tuning a engine this is a ball park way to get you close. But until you load the engine like it'll be loaded on the road/dragstrip you won't get it deadly accurate.
Rich
When tuning a engine this is a ball park way to get you close. But until you load the engine like it'll be loaded on the road/dragstrip you won't get it deadly accurate.
Rich
#55
03-03-2009
In its most basic form, a rear wheel dyno is a fixed inertia-only type device in that it does not actually measure an engine's torque output using an absorption unit. Instead, the motorcycle's rear wheel accelerates a heavy roll of known mass and inertia. The dyno measures the time and rate of acceleration to a given engine speed at wide-open throttle (WOT) conditions. Torque and horsepower are then calculated by software from the time and acceleration rate. The more rapidly the heavy steel drum is accelerated to a given rpm, the greater the engine's horsepower.
#56
03-03-2009
Like I said, there are many measurement techniques, look at this:
In its most basic form, a rear wheel dyno is a fixed inertia-only type device in that it does not actually measure an engine's torque output using an absorption unit. Instead, the motorcycle's rear wheel accelerates a heavy roll of known mass and inertia. The dyno measures the time and rate of acceleration to a given engine speed at wide-open throttle (WOT) conditions. Torque and horsepower are then calculated by software from the time and acceleration rate. The more rapidly the heavy steel drum is accelerated to a given rpm, the greater the engine's horsepower.
In its most basic form, a rear wheel dyno is a fixed inertia-only type device in that it does not actually measure an engine's torque output using an absorption unit. Instead, the motorcycle's rear wheel accelerates a heavy roll of known mass and inertia. The dyno measures the time and rate of acceleration to a given engine speed at wide-open throttle (WOT) conditions. Torque and horsepower are then calculated by software from the time and acceleration rate. The more rapidly the heavy steel drum is accelerated to a given rpm, the greater the engine's horsepower.
Now.. answer the original question. Maybe you could show us a horsepower wrench?
#57
03-03-2009
Stop posting pics of little import cars. one or 2 would have been sufficient, I don't think those fall into the discussion of the origional thread their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..
Horsepower = how fast you hit the wall
torque = how HARD you hit the wall
..discussion closed
Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..Horsepower = how fast you hit the wall
torque = how HARD you hit the wall
..discussion closed
Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
#58
03-03-2009
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Stop posting pics of little import cars. one or 2 would have been sufficient, I don't think those fall into the discussion of the origional thread their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..
Horsepower = how fast you hit the wall
torque = how HARD you hit the wall
..discussion closed
Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
their useless, they get tons of money put into them, get trailered to SEMA, if their LUCKY thrown on a dyno for bragging rights then go to shows until their stripped for parts for the next car..Horsepower = how fast you hit the wall
torque = how HARD you hit the wall
..discussion closed
Both the 4.0 OHV and 4.0 I6 in Jeeps are strong, bullet proof motors.
#59
03-03-2009
Getting back to the original point..
IMO a longer stroke crank, ported heads, a matching cam, and a good rotational balance would be a solid rebuild to get you a "HO" engine.
Our 4.0L castings are pretty weak so I'd not push one of these things too hard w/o a really really good balance job.
A good benchmark would be to check out what SUPER SIX MOTORSPORTS is offering.
Our 4.0L castings are pretty weak so I'd not push one of these things too hard w/o a really really good balance job.
A good benchmark would be to check out what SUPER SIX MOTORSPORTS is offering.
#60
03-03-2009
#61
03-04-2009
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#62
03-04-2009
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