A "427" c7?
09-23-2012, 11:39 PM
#21
Le Mans Master
Thread Starter
It would not surprise me in the least if we find a better 427 with an LS3 type top end appearing in the C7
09-23-2012, 11:41 PM
#22
09-23-2012, 11:43 PM
#23
Drifting
09-24-2012, 05:57 AM
#24
Team Owner
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
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09-26-2012, 01:40 PM
#26
Le Mans Master
09-26-2012, 02:12 PM
#28
Team Owner
Emissions is a non issue these days. Since the advent of SULEV engines, the EPA doesn't seem to care about the actual emissions any more. The non C02 emissions of modern automobiles hit the point of diminishing returns. It is all about gas mileage now but a 427 option is a marketing gold mine and with DI, cylinder deactivation and auto stop/start at traffic lights MPG should not be a problem.
Last edited by chaase; 09-26-2012 at 02:49 PM.
09-26-2012, 02:22 PM
#29
C7 will use GenV engines, the LS7 is a GenIV. I very much doubt we will see an LS7. We might (sadly still unlikely) see an engine that shares displacement with the LS7, or maybe even bore x stroke, but it will not be the LS7.
09-26-2012, 02:32 PM
#30
Burning Brakes
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I think the 427 will be back eventually, maybe even in the 7th gen. You have to remember that a lot of advancements have been made to engines since the current LS7 was first created.
It may not be called LS7 necessarily, as CPhelps just mentioned, but the 427 has a lot of appeal to many people. I have no doubt that GM will make it work if there is profit to be made.
It may not be called LS7 necessarily, as CPhelps just mentioned, but the 427 has a lot of appeal to many people. I have no doubt that GM will make it work if there is profit to be made.
09-26-2012, 05:25 PM
#32
Drifting
I think the 427 will be back eventually, maybe even in the 7th gen. You have to remember that a lot of advancements have been made to engines since the current LS7 was first created.
It may not be called LS7 necessarily, as CPhelps just mentioned, but the 427 has a lot of appeal to many people. I have no doubt that GM will make it work if there is profit to be made.
It may not be called LS7 necessarily, as CPhelps just mentioned, but the 427 has a lot of appeal to many people. I have no doubt that GM will make it work if there is profit to be made. Bingo..The word Profit says it all. That's what its all about.
09-26-2012, 06:37 PM
#34
Drifting
Its not all that difficult to get a larger engine to pass emissions standards. One thing everyone forgets about the lsX motors, they used no real modern tech or tricks and I believe they'll still be emissions legal for couple more years, its just time for a change obviously.
Its not all that expensive either, the only thing being that the block needs to be of seriousquality. The 7000 redline of the ls7 is where a lot of money got dumped. They needed parts to allow it to reliably live that high, and a top end to feed it. I think some forget how big a deal that is for a production fully warranted engine, with pushrods and a huge stroke to hit 7000rpms. Much more impressive then a dohc 4 cylinder hitting 8000 or even the m3's 4.0 hitting 8300. If they target 6500rpm fuel cut off and peak power at 6200 again, they could fairly easily make another 427, maybe even the L88 as someone said. Just make the gearing such that it stays in the powerband. The cost is still there, but it would be stupidly cheaper then the ls7's tricky valvetrain/internals.
For reference, the new 392 or 6.4 Hemi is as naturally dirty yet powerful as their other modern "hemis." It still has an extra spark plug to burn off unspent gas downstream, but the power potential is still great. The 392 with variable cam timing makes 470hp and torque, redlining at 6400. That shows the potential of variable cam timing and what it will do in, quite frankly, a better designed motor family. And for anyone that disagrees, shame on you for defending 1 of probably 5 engines made today with an iron block. And I can't think of any in cars, not trucks, besides the Hemis.
Its not all that expensive either, the only thing being that the block needs to be of seriousquality. The 7000 redline of the ls7 is where a lot of money got dumped. They needed parts to allow it to reliably live that high, and a top end to feed it. I think some forget how big a deal that is for a production fully warranted engine, with pushrods and a huge stroke to hit 7000rpms. Much more impressive then a dohc 4 cylinder hitting 8000 or even the m3's 4.0 hitting 8300. If they target 6500rpm fuel cut off and peak power at 6200 again, they could fairly easily make another 427, maybe even the L88 as someone said. Just make the gearing such that it stays in the powerband. The cost is still there, but it would be stupidly cheaper then the ls7's tricky valvetrain/internals.
For reference, the new 392 or 6.4 Hemi is as naturally dirty yet powerful as their other modern "hemis." It still has an extra spark plug to burn off unspent gas downstream, but the power potential is still great. The 392 with variable cam timing makes 470hp and torque, redlining at 6400. That shows the potential of variable cam timing and what it will do in, quite frankly, a better designed motor family. And for anyone that disagrees, shame on you for defending 1 of probably 5 engines made today with an iron block. And I can't think of any in cars, not trucks, besides the Hemis.
09-27-2012, 09:05 PM
#36
Burning Brakes
They down-sized to a new 5.5L with skinny 285 rear tires for a reason. ...It's 1973 all over again.
2013 is your last chance to own a 427.
09-27-2012, 09:40 PM
#39
Drifting
That's an EXTREME exaggeration right there. Everyone seems to forget that in the 70's, the companies sat idly by and got killed by new emissions laws. No one was prepared for it. Emissions standards are known world wide these days, as much as 10 years in advance or more. They run with what they have until they can go no further, and then they do updates to keep it modern. That's why anyone that thinks the Chevy pushrod is on its way out is nuts. Every target hp they hit, through flexible displacements. And they did it with 0 modern tricks. Now odds are they'll throw variable cam timing, and direct injection on almost all their v8's. The hp bumps for Chevy at least have begun anew.
And the engine is not official. More and more an updated 6.2 seems to be suggested. And as far as tires? The 444hp boss 302 runs 255 I believe(maybe 275 rear?) and the 662hp gt500 runs 285 tires. If the suspension is set up for it, the shocks/spring absorbing a lot of recoil means you don't need giant tires. Besides, you can't tell what size tires it has in the pics.
If a 5.5 makes over 505hp, then who cares? Its all about advancements. And the ls7 is a 428 anyway isn't it? I've seen that multiple times, just never done the math.
And the engine is not official. More and more an updated 6.2 seems to be suggested. And as far as tires? The 444hp boss 302 runs 255 I believe(maybe 275 rear?) and the 662hp gt500 runs 285 tires. If the suspension is set up for it, the shocks/spring absorbing a lot of recoil means you don't need giant tires. Besides, you can't tell what size tires it has in the pics.
If a 5.5 makes over 505hp, then who cares? Its all about advancements. And the ls7 is a 428 anyway isn't it? I've seen that multiple times, just never done the math.
09-27-2012, 09:46 PM
#40
Drifting
Lets not forget Ferrari just released a freakin SEVEN HUNDRED AND THIRTY horsepower, naturally aspirated car! And before you say they are different and have less limitations then the corvette, remember that's what everyone for years, and then the c6 z06 came out. And then the bitch slap to the supercar world with the $100,000 zr1. Which had more hp then any Ferrari ever except the Enzo. The hp wars have probably close to ten more years before something, I dunno what, cool down.