2014 C7 Chevrolet Corvette

[Rayme]

Originally Posted by Wes B.

Displacement is far from an arbitrary number. It measures the volume of all cylinders in one combustion cycle. If an engine has more volume, it should produce more power because more fuel and air can undergo combustion in that one cycle. More power is generally equal to better performance. So, yes, displacement does matter, and, no, it most certainly isn't an arbitrary number in terms of actual performance.

Bottom line: I won't be impressed until GM can yank at least 550 naturally aspirated horsepower from the LT1 straight from the factory.

I doubt that's realistic in a street vehicle. GM has been refining their pushrod engines for years and years, and it seems more displacement is the only way to extract more power if they want to keep the same engine architecture.

[Wes B.]

Originally Posted by ottopilot

I doubt that's realistic in a street vehicle. GM has been refining their pushrod engines for years and years, and it seems more displacement is the only way to extract more power if they want to keep the same engine architecture.

A ton of companies are creating a whole lot more with less. I guess it's time for GM to revert back to the engine architecture of the LT5 found in C4 ZR-1's.

[Supermassive]

Ive kinda been lurking in this thread, and all I have to say is that nothing Ford or Chevy has made in the last 5 years has been interesting to me. The new Corvette has taken styling cues from the Camaro (those hideous tail lights, angular body lines, exagerated proportions) and that's the exact opposite of what I was hoping for...I was hoping the designers would take inspiration from the svelte sensuous curves of their classic Vettes, instead of finding inspiration in their ugly Camaro.

Ford is no better in my eyes, the Mustang is ugly, they let the retro look get played out and stuck with it too long. I am however interested in the next gen Mustang...we'll see how that pans out when it hits showroom floors.

The only American muscle car I like is the new Viper, it stayed true to its roots while improving almost everything about the car. If I had that kind of money i would have one for sure, can't say the same about Ford and GM...Now if Ford somehow releases a Ford GT successor but made it competitive with the Vette, that would pretty much fulfill my fantasies.

[ZDan]

Originally Posted by Wes B.

Except that the Corvette engine is both bigger (displacement-wise) and heavier than the Coyote V8 in the Mustang.

Coyote is physically MUCH bigger. I've seen conflicting reports regarding weight, most put the 5.0 as heavier. Suffice it to say they're both in the 435 lb. range.

Why Ford ever got rid of the Windsor 302 is beyond me. It is such a capable and reliable engine that is far easier to work with than any of the Modular variants.

When I build my Daytona Coupe replica, it will have a 347 OHV windsor

Smaller displacement engines don't always make more power per liter...

No, but they should. Smaller displacement is an inherent advantage for power/weight, as they will be able to rev higher.

"Given the same power output, I'd go with the smaller, lighter-weight, lower-c.g. engine as a matter of course." -- So, you'd go with the Mustang?

Again, the Mustang engine is physically MUCH bigger than an LS v8. Weight is similar, I'm betting the LS is slightly lighter if anything. The 5.0 certainly will have a higher c.g.

Has anyone built a 5.0 Coyote FD yet? The LS fits, I have my doubts about the 5.0...

[ZDan]

Originally Posted by Wes B.

A ton of companies are creating a whole lot more with less. I guess it's time for GM to revert back to the engine architecture of the LT5 found in C4 ZR-1's.

Pig of a motor, way bigger and heavier than the LS, less power.

[Wes B.]

Originally Posted by ZDan

Pig of a motor, way bigger and heavier than the LS, less power.

Pig of a motor -- OK, that's your opinion.

Way bigger and heavier than the LS -- Any numbers to back that up?

Less power -- 1993-1995 LT5's put out 405hp/385tq while the comparable OHV LT1 found in all other Corvette's between 1993-1995 only put out 300hp/330tq.

[GTB/ZR-1]

It's true the LT5s are a good bit heavier than the LS motors by a pretty good margin. They do respond very well to mods & make power ALL the way to redline (and above if the limiter is bumped) . My 368ci makes ~525 HP @ the crank (461 SAE whp) with some port work, headers & cams with slightly more duration. It will match the new Z06 in the quarter in time/trap.

That being stated... It's 25+ year-old technology @ this point. If they had continued developing it to this day, I'm sure it would be lighter & more powerful than the old LT5--by a good margin, I'd bet...

[LSxJunkie]

Originally Posted by ZDan

Coyote is physically MUCH bigger. I've seen conflicting reports regarding weight, most put the 5.0 as heavier. Suffice it to say they're both in the 435 lb. range.

When I build my Daytona Coupe replica, it will have a 347 OHV windsor

No, but they should. Smaller displacement is an inherent advantage for power/weight, as they will be able to rev higher.

Again, the Mustang engine is physically MUCH bigger than an LS v8. Weight is similar, I'm betting the LS is slightly lighter if anything. The 5.0 certainly will have a higher c.g.

Has anyone built a 5.0 Coyote FD yet? The LS fits, I have my doubts about the 5.0...

The 2014 LT1 is 465lbs. I'm assuming the block and heads are the same or similar size as an LS3, even though they're new castings and supposedly nothing can be shared.

[ZDan]

Originally Posted by GTB/ZR-1

It's true the LT5s are a good bit heavier than the LS motors by a pretty good margin. They do respond very well to mods & make power ALL the way to redline (and above if the limiter is bumped) . My 368ci makes ~525 HP @ the crank (461 SAE whp) with some port work, headers & cams with slightly more duration. It will match the new Z06 in the quarter in time/trap.

The 364 c.i. LS2 in my RX-7 has stock (lightly shaved to maintain CR, not ported) L92 heads (similar to LS3 but with solid valves) and a 222/230 .597" cam. The engine added about 50 lb. to my FD, which will match a new ZR1 in the quarter and beat the totally-stock ones at the Texas Mile (184.8mph vs. 178 - 183mph) in Oct.



Also averages 27mpg on the highway at 70-75mph (best tank: 29mpg). Not too shab...

That being stated... It's 25+ year-old technology @ this point. If they had continued developing it to this day, I'm sure it would be lighter & more powerful than the old LT5--by a good margin, I'd bet...

No doubt.

[ZDan]

Originally Posted by LSxJunkie

The 2014 LT1 is 465lbs. I'm assuming the block and heads are the same or similar size as an LS3, even though they're new castings and supposedly nothing can be shared.

GMPerfomance lists LS3 weight as 415 lb.
http://www.chevroletperformance.com/...ineQRC2010.pdf

FordRacing lists 5.0 Coyote weight as 444 lb.
http://www.fordracingparts.com/parts...KeyField=12865

[GTB/ZR-1]

Originally Posted by ZDan

FordRacing lists 5.0 Coyote weight as 444 lb.
http://www.fordracingparts.com/parts...KeyField=12865

I'm not a Ford guy-but that's impressively light for a DOHC motor.

I got to flog the pi$$ out of a Laguna Seca Boss @ the $2011 Grassroots Motorsports Challenge (I'm one of the Pro drivers the magazine uses), and I was very impressed w/ the motor. Smooth, electric-like revs to redline & good pull all the way up.




If only GM would have continued development on that 'ol LT5... oh well... lol

[Dimman]

Think about this: for all their millions of hours of combustion modelling, direct injection and cam timing, if they hit 465 hp, it will have less specific output than a 1997 Acura Integra with no VTEC. So if the OHV setup is displacement friendly, just make it 8 liters or something and save all that development time.

These resources would be better spent making the rest of their line up not suck.

[RRnold]

Originally Posted by ottopilot

Spend most of the time driving? Make that ALL the time, unless you do some ghost ridin'

But seriously, the cheap interior has been something everyone has been saying for a long time now. GM has no excuse to deliver if they want to show that they listen to buyers, I agree it's a great performance machine and I don't think they need to prove that once again, time to refine.

Have you ever sat in the seat for hours, even sleep in your brand new car?

To me, it's the little things that can make an interior look better. The texture of the plastic panels that GM, Ford and Dodge, the size of the shift knobs, the flat and boring dash layout, the high center console, the vents, the 80's looking LED dash display and color all make it look that much more cheap looking.

IMO, the interior of the CTS is moving in the right direction and I hope GM can port some of that style into their future Chevy models w/out substantially increasing the price.

[ZDan]

Originally Posted by GTB/ZR-1

I'm not a Ford guy-but that's impressively light for a DOHC motor.

Yes it is. Slightly heavier than the 6.2 liter LS3 with similar output, about the same weight as the significantly more powerful 7.0 liter LS7.

I got to flog the pi$$ out of a Laguna Seca Boss @ the $2011 Grassroots Motorsports Challenge (I'm one of the Pro drivers the magazine uses), and I was very impressed w/ the motor. Smooth, electric-like revs to redline & good pull all the way up.

It's a great engine. But I don't see any inherent torque/power curve advantages vs. the LS engines. Mine pulls like a train up to the 7200rpm limiter.

If only GM would have continued development on that 'ol LT5... oh well... lol

I'm glad they stuck with OHV cam-in-block architecture. A Corvette built around a massive DOHC engine would be a bigger, heavier car, with a much higher more bluff and bulbous nose.