Chevy SS
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Interesting Story, Ford tried to buy Ferrari a long time ago because they weren't a force in the supercar market and Ferrari told them to go take a hike so Ford said "WELL" we'll just build our own car to destroy them. Enter The GT40. And it did. Ford won the Le Mans. So it is entirely accurate to compare The new GT to the Ferrari, Porsche And Lambo. I hope the new GT will uphold its heritage cause the brand new design (front engine, rear wheel drive) Ferrari's look awesome as well as the uber Porsche GT2, Lambo....bleh... Im a Chevy guy but even I'll admit I'm drooling over the chance to drive let alone touch a new GT.
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If you're so interesten in the direction and outcome of the supercar market you should pay close attention to the Le Mans series next year. There will be a new GM Corvette entry that should be big block powered and N/A. Dodge sponsored Viper teams should have an entry. Then Ford will run the GT. As great as everyone may think the GT is it's still has to prove it's name in the racing world. The 'Vettes finished 1-2 at Le Mans this year. Next years Z06 will also be 500+ HP.
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If you're so interested in the direction and outcome of the supercar market you should pay close attention to the Le Mans series next year. There will be a new GM Corvette entry that should be big block powered and N/A. Dodge sponsored Viper teams should have an entry after last years absence. Then Ford will run the GT. As great as everyone may think the GT is it's still has to prove it's name in the racing world. The 'Vettes finished 1-2 at Le Mans this year beating out Ferarri. So you know both manufacturers are coming with it next season. Next years Z06 will also be 500+ HP. How do you like that! All in all it will be a good time.
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From: Orange
Originally Posted by 04F250CC60
Next years Z06 will also be 500+ HP.
And the last time Ford was really in LeMans, the GT40 finished 1-2-3 in LeMans, beating out Ferrari.
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From: IN
Overhead valve technology is ancient. I was so disappointed when GM dropped the ZR1 with the DOHC. They took a step back and tons of potential away from the 'vette.
Overhead valve technology might be a relatively old method of making motors, but it certainly isn't ancient. The main reason for seeing OHC's in the late 80's and early 90's was that engine management hadn't caught up with the rest of technology. Today's overhaed valves in combination with the superior engine management systems can produce as much (if not more)power and run just as efficiently as OHC motors. That coupled with the fact that they have less moving parts and are cheaper to produce is why the manufacturers are still using OHV technology.
Overhead valve technology might be a relatively old method of making motors, but it certainly isn't ancient. The main reason for seeing OHC's in the late 80's and early 90's was that engine management hadn't caught up with the rest of technology. Today's overhaed valves in combination with the superior engine management systems can produce as much (if not more)power and run just as efficiently as OHC motors. That coupled with the fact that they have less moving parts and are cheaper to produce is why the manufacturers are still using OHV technology.
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From: Pryor
"Today's overhaed valves in combination with the superior engine management systems can produce as much (if not more)power and run just as efficiently as OHC motors."
Not unless they have multiple valves. Two valve setups on pushrod engines simply can't flow enough to compete with a multivalve OHC engine. By the time you are talking about multiple valves with a pushrod engine, you have the cost and complexity to a similar ground. OHC is the way to go.
Not unless they have multiple valves. Two valve setups on pushrod engines simply can't flow enough to compete with a multivalve OHC engine. By the time you are talking about multiple valves with a pushrod engine, you have the cost and complexity to a similar ground. OHC is the way to go.
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From: SE PA
Originally Posted by benwantland
Anyone remember the 454 SS of the early 90's? Now THAT took ***** on GM's part. Putting a 454 in a half ton years before anyone else was selling "sport trucks". Granted, it probably hardly had 300 horses, but at that time, it was king of the road.
I believe this was primarily due to gearing in the rear but the fact remains the same.
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From: IN
Originally Posted by bigsnag
"Today's overhaed valves in combination with the superior engine management systems can produce as much (if not more)power and run just as efficiently as OHC motors."
Not unless they have multiple valves. Two valve setups on pushrod engines simply can't flow enough to compete with a multivalve OHC engine. By the time you are talking about multiple valves with a pushrod engine, you have the cost and complexity to a similar ground. OHC is the way to go.
Not unless they have multiple valves. Two valve setups on pushrod engines simply can't flow enough to compete with a multivalve OHC engine. By the time you are talking about multiple valves with a pushrod engine, you have the cost and complexity to a similar ground. OHC is the way to go.
The 2 valve heads from Dodges 5.7 Hemi also flow more CFM than Ford's 3 Valve 5.4 heads. Before you say they don't, I have flow numbers for both heads The 5.7 heads flow around 270 CFM out of the box with no port work. The 3V 5.4 heads are down around 235 CFM. Both sets of numbers came off the same bench, so they are comparable.
EDIT: I just found my paperwork, and the 3v heads were around 255 CFM, not 235. Still not quite as high as the 2V 5.7 heads.
Last edited by Ev2Demon; Jul 21, 2004 at 10:04 PM.
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From: Pryor
"the LS6 out powers any naturally aspirated similarly sized motor Ford has ever produced, including the 4 valve 5.4 from the Cobra R."
Do a little math and figure out the hp per CID and it's basically a draw between the two engines. The R's were severely underrated from the factory as well. I have seen several dyno's to back that up.
You are the only person I have heard of that has flow numbers on the 3V heads. Where did you get that stuff?? Also, you have to admit that no two head can flow as much as a 4 valve head. It isn't possible.
Do a little math and figure out the hp per CID and it's basically a draw between the two engines. The R's were severely underrated from the factory as well. I have seen several dyno's to back that up.
You are the only person I have heard of that has flow numbers on the 3V heads. Where did you get that stuff?? Also, you have to admit that no two head can flow as much as a 4 valve head. It isn't possible.
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From: Saskatoon
"Also, you have to admit that no two head can flow as much as a 4 valve head. It isn't possible."
Heard of the old hemi????? The new hemi is not quite the old one, it can't pass emissions with a full blown hemi design.
Heard of the old hemi????? The new hemi is not quite the old one, it can't pass emissions with a full blown hemi design.
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Joined: Feb 2004
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From: Orange
Valves are valves, no matter how they are opened, they're still valves. A 2 valve engine is the same valve design as the standard OHV engine. It all depends on how big the manufacturer wants to make the valves. The difference is how the valves are opened. OHV has the crankshaft turn the cam, which moves the lifters, which moves the pushrods, which move the rocker arms, which push the valves open. OHC engines don't have to bother with lifters, rocker arms, or push rods. Less valve train weight means less rotating mass, means more efficient design.