When do we get a 4 valve DOHC 6.2?
#76
All you need to do is look at Chevy and Dodge to see old technology as in pushrod engines. They still haven't moved into the OHC world, no matter what their HP and TORQ specs are. That said I would love to see 4v heads for the 6.2. Mine has only 3600 miles on it and its way smoother and has a much broader power band than the 03 V-10 had. Now if we could just get a manual transmission as well. Also not a fan of DI, if they go that route need to go like Toyota and use D4S and variable valve timing on intake and exh cams, that would compensate for any measurable low end torque.
#77
After reading the first couple of very positive reviews on the new 5.0, I just got to thinkin. If the 5.0 was 1/4 larger it would be a 6.25L, which is pretty darn close to the 6.2L. If everything stayed the same a 6.25L version of the 5.0 truck engine (360hp / 380tq) would have 450 horsepower and 475 lb ft of torque! Come on Ford, slap some 4v DOHC heads on the 6.2!!!
#79
#80
As I understand the technology that went in to the design of the heads/valves in this engine, the valves are big enough to flow all the air that the engine is capable of pumping as is, and that is why Ford has stuck with the design.
Now I may be wrong about this, but???????
So, with ths being said, in order to utilize a 4 valve head, either the engine displacement, or engine RPM must also increase, or both! In other words, made capable of pumping more air! And a lot of people dont like the way it likes to rev now!
Now I may be wrong about this, but???????
So, with ths being said, in order to utilize a 4 valve head, either the engine displacement, or engine RPM must also increase, or both! In other words, made capable of pumping more air! And a lot of people dont like the way it likes to rev now!
#81
I agree. The current 6.2 is a pig of an engine and a outdated dinosaur once it hit the market. Ford could have designed a much better 6.2 with a DOHC right off the bat.
I made this exact same point on another thread here on this site.
I, for one, am not gonna fall for paying big money for a truck only to have it be rendered outdated before I am even done making the payments. I'm not gonna be suckered.
Sorry Ford, no sale here until you bring out the 4 valve 6.2. Don't make me wait too long either because if you don't give me what I want and do it soon, someone else will.
Also, every other F150 engine has 4 valve heads, aluminum blocks, and forged cranks. Even the base F150's base V6 has these things. The 6.2 however, has none of them. All of the Toyota and Nissan trucks have them too. Kinda makes me feel like I'm being slighted and cheated, like the buyers of the other trucks and engines are getting more for their money.
Competition and enough of us hollering about it will force Ford to do something about it.
Regards, Eric
I, for one, am not gonna fall for paying big money for a truck only to have it be rendered outdated before I am even done making the payments. I'm not gonna be suckered.
Sorry Ford, no sale here until you bring out the 4 valve 6.2. Don't make me wait too long either because if you don't give me what I want and do it soon, someone else will.
Also, every other F150 engine has 4 valve heads, aluminum blocks, and forged cranks. Even the base F150's base V6 has these things. The 6.2 however, has none of them. All of the Toyota and Nissan trucks have them too. Kinda makes me feel like I'm being slighted and cheated, like the buyers of the other trucks and engines are getting more for their money.
Competition and enough of us hollering about it will force Ford to do something about it.
Regards, Eric
#82
With a proper Variable valve timing system, you can have both low end, and better high end hp. take the 2v vs. 3v 5.4 for example.
#84
#85
#86
The 6.2 L is pretty old tech, but the objective for the 6.2 L was low cost and reliability.
The 32-valve engines from GM, Toyota and Nissan are pretty complex, and the GM Northstar is a PITA to work on. The complex heads and variable valve timing gear on 4 valves is not cheap.
The 6.2 already uses roller-rockers, dual-equal variable valve timing (both intake and exhaust, according to my reading), and also two spark plugs per cylinder. Having 4 valves per cylinder might add some power, but it will add complexity, more parts that need lubrication and which can fail, for not really that much extra power.
Ford 6.2L Liter Engine Specs, Ford Engine Specs, Ford 6.2L engine, We are a Large Ford Truck Dealership, Meadowland Ford, Secaucus NJ
How much reliability would be a fair trade-off for more power? I dunno, but if you're stuck out on the side of the road in the middle of nowhere with your family and your truck and trailer, would you rather want reliability or power?
I'd rather take reliability and get there 6 minutes slower towing an 8k camper.
The 32-valve engines from GM, Toyota and Nissan are pretty complex, and the GM Northstar is a PITA to work on. The complex heads and variable valve timing gear on 4 valves is not cheap.
The 6.2 already uses roller-rockers, dual-equal variable valve timing (both intake and exhaust, according to my reading), and also two spark plugs per cylinder. Having 4 valves per cylinder might add some power, but it will add complexity, more parts that need lubrication and which can fail, for not really that much extra power.
Ford 6.2L Liter Engine Specs, Ford Engine Specs, Ford 6.2L engine, We are a Large Ford Truck Dealership, Meadowland Ford, Secaucus NJ
How much reliability would be a fair trade-off for more power? I dunno, but if you're stuck out on the side of the road in the middle of nowhere with your family and your truck and trailer, would you rather want reliability or power?
I'd rather take reliability and get there 6 minutes slower towing an 8k camper.
Last edited by Powerdude; 01-09-2016 at 02:00 PM. Reason: more links added.
#87
#88
#89
The 2v had more plug problems then the 3v. The 3v broke plugs because of an initial poor design and because people didn't know how to remove them properly. The 2v would spit the plugs right out of the head for no reason.
#90
The 6.2 L is pretty old tech, but the objective for the 6.2 L was low cost and reliability.
The 32-valve engines from GM, Toyota and Nissan are pretty complex, and the GM Northstar is a PITA to work on. The complex heads and variable valve timing gear on 4 valves is not cheap.
The 6.2 already uses roller-rockers, dual-equal variable valve timing (both intake and exhaust, according to my reading), and also two spark plugs per cylinder. Having 4 valves per cylinder might add some power, but it will add complexity, more parts that need lubrication and which can fail, for not really that much extra power.
Ford 6.2L Liter Engine Specs, Ford Engine Specs, Ford 6.2L engine, We are a Large Ford Truck Dealership, Meadowland Ford, Secaucus NJ
How much reliability would be a fair trade-off for more power? I dunno, but if you're stuck out on the side of the road in the middle of nowhere with your family and your truck and trailer, would you rather want reliability or power?
I'd rather take reliability and get there 6 minutes slower towing an 8k camper.
The 32-valve engines from GM, Toyota and Nissan are pretty complex, and the GM Northstar is a PITA to work on. The complex heads and variable valve timing gear on 4 valves is not cheap.
The 6.2 already uses roller-rockers, dual-equal variable valve timing (both intake and exhaust, according to my reading), and also two spark plugs per cylinder. Having 4 valves per cylinder might add some power, but it will add complexity, more parts that need lubrication and which can fail, for not really that much extra power.
Ford 6.2L Liter Engine Specs, Ford Engine Specs, Ford 6.2L engine, We are a Large Ford Truck Dealership, Meadowland Ford, Secaucus NJ
How much reliability would be a fair trade-off for more power? I dunno, but if you're stuck out on the side of the road in the middle of nowhere with your family and your truck and trailer, would you rather want reliability or power?
I'd rather take reliability and get there 6 minutes slower towing an 8k camper.