Hard Data ....
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Some food for thought as we wait for real info..
1) Why was their no mention of E85 or ethanol in the Gen V SAE tech paper? A 2010 GM press release stated that the Gen V engines were going to be E85 capable. The recent SAE paper covered all the Gen V engines, not just the LT1, and at least some of them should be designed to accept E85. Seems as if any mention of ethanol was scrubbed from the paper. Why ?
2) In Table 1, the L86 ( truck ) and LT1 are shown to have the same basic cam spec’s. WTF !
3) L88 - GM seems to reactivating this designation. How about an LT1 with titanium ( or better ) bits with better performance cam, 13:1 compression ( 91 octane min ), and no 4 cyl operation, and optimized E85 operation; prob 540 on gas and 600 on E85.
Cheers
1) Why was their no mention of E85 or ethanol in the Gen V SAE tech paper? A 2010 GM press release stated that the Gen V engines were going to be E85 capable. The recent SAE paper covered all the Gen V engines, not just the LT1, and at least some of them should be designed to accept E85. Seems as if any mention of ethanol was scrubbed from the paper. Why ?
2) In Table 1, the L86 ( truck ) and LT1 are shown to have the same basic cam spec’s. WTF !
3) L88 - GM seems to reactivating this designation. How about an LT1 with titanium ( or better ) bits with better performance cam, 13:1 compression ( 91 octane min ), and no 4 cyl operation, and optimized E85 operation; prob 540 on gas and 600 on E85.
Cheers
1) LV3 4.3L V6 with 11:1 CR for regular gas. truck
2) L83 5.3L V8 with 11:1 CR for regular gas. truck
3) L86 6.2L V8 with 11.5:1 CR for premium gas. truck
4) LT1 6.2L V8 with 11.5:1 CR for premium gas. Corvette
I have not seen the word "FlexFuel" used in any GM press releases pertaining to these four engines.
Thread Starter
Instructor
Joined: Nov 2001
Posts: 145
Likes: 38
From: Upper Marlboro MD
A GM Press releases about Gen V...
http://media.gm.com/media/us/en/gm/n...27_plants.html
"The next generation small block engine family will have unprecedented fuel efficiency through direct injection and an all-new advanced combustion system design. The new engine family will rely exclusively on aluminum engine blocks, which are lighter and contribute to the improved fuel efficiency. In addition to being E85 ethanol capable, these engines are being designed with the capability to meet increasingly stringent criteria emissions standards expected throughout this decade."
But that was from 2010 ...
http://media.gm.com/media/us/en/gm/n...27_plants.html
"The next generation small block engine family will have unprecedented fuel efficiency through direct injection and an all-new advanced combustion system design. The new engine family will rely exclusively on aluminum engine blocks, which are lighter and contribute to the improved fuel efficiency. In addition to being E85 ethanol capable, these engines are being designed with the capability to meet increasingly stringent criteria emissions standards expected throughout this decade."
But that was from 2010 ...
Le Mans Master
Joined: Jul 2009
Posts: 9,526
Likes: 12
From: Los Angeles California
You can park the ZR1 in the sun and leave the engine running where it's 110F in the shade, at Pahrump Nevada. When you leave the classroom, you climb into the air conditioned ZR1, and head out onto the track for open lapping until your balaclava is drenched and your arms are about to fall off. When you come in, pull back into the line and leave it running, air cond on. Repeat throughout the day. That's Ron Fellow school at Spring Mountain. Just ask them if you can hot lap the LS9. They do it every day. Take one of the GS's and try to hang with with these ZR1's that have been heat soaking themselves to a standstill. You may be able to keep up with them, I did but it was a lot of work because they easily pull on the straights, and slow down better on the brakes. They also corner harder, have more grip. A good driver can keep up in a GS which feels lighter on the track, but an equal driver in the ZR1 can get away for good. Heat or no, it always fast.
Burning Brakes
Joined: Nov 2010
Posts: 994
Likes: 30
From: Aurora Colorado
It's going to make less but the heat is also sapping power from the GS and Z06. So to the point, is the ZR1 adversely affected disproportionately? If it is, I couldn't feel it. It was a beast throughout.
Le Mans Master
Joined: Jul 2009
Posts: 9,526
Likes: 12
From: Los Angeles California
I don't plan to own a ZR1, so I'll take your word.
I may put a maggie on my Z06 if I keep it. We'll see. I would love to keep the Z06 and still buy the C7, but the C7 is my priority so the Z06 goes if it has to.
The Z06 with a Maggie should be right there with the ZR1. So we'll see how hot lapping goes. I know it won't be the same thing, but it could be similar.
I may put a maggie on my Z06 if I keep it. We'll see. I would love to keep the Z06 and still buy the C7, but the C7 is my priority so the Z06 goes if it has to.
The Z06 with a Maggie should be right there with the ZR1. So we'll see how hot lapping goes. I know it won't be the same thing, but it could be similar.
Melting Slicks
Joined: Jun 2005
Posts: 2,216
Likes: 1
St. Jude Donor '12-'13-'14, '16
A GM Press releases about Gen V...
http://media.gm.com/media/us/en/gm/n...27_plants.html
"The next generation small block engine family will have unprecedented fuel efficiency through direct injection and an all-new advanced combustion system design. The new engine family will rely exclusively on aluminum engine blocks, which are lighter and contribute to the improved fuel efficiency. In addition to being E85 ethanol capable, these engines are being designed with the capability to meet increasingly stringent criteria emissions standards expected throughout this decade."
But that was from 2010 ...
http://media.gm.com/media/us/en/gm/n...27_plants.html
"The next generation small block engine family will have unprecedented fuel efficiency through direct injection and an all-new advanced combustion system design. The new engine family will rely exclusively on aluminum engine blocks, which are lighter and contribute to the improved fuel efficiency. In addition to being E85 ethanol capable, these engines are being designed with the capability to meet increasingly stringent criteria emissions standards expected throughout this decade."
But that was from 2010 ...
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Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
But, so far, GM has not officially mentioned the GenV engine and E85 in the same sentence. GM did proudly tell us about the GenV's DI, VVT and AFM along with the ten million hours of computer time to develop the combustion chamber and piston shapes. Odd they would tell us about that and not mention E85, if it is indeed compatible with the GenV engine.
Racer
Joined: Dec 2010
Posts: 326
Likes: 6
From: Tampa Fl
Well, when I was out there, at least one ZR1 overheated. I was in the car while one of the instructors was taking me around the track at full bore. We had to do a cool down lap before taking it in. And, on the last day, no ZR-1 passed me while I was driving a GS. No doubt they are faster though - I was just driving like a maniac.
Melting Slicks
Joined: Jun 2005
Posts: 2,216
Likes: 1
St. Jude Donor '12-'13-'14, '16
There was a guy on another forum who claimed to be a GM engineer that was talking about E85 and LT1 in the same sentence.
But, so far, GM has not officially mentioned the GenV engine and E85 in the same sentence. GM did proudly tell us about the GenV's DI, VVT and AFM along with the ten million hours of computer time to develop the combustion chamber and piston shapes. Odd they would tell us about that and not mention E85, if it is indeed compatible with the GenV engine.
But, so far, GM has not officially mentioned the GenV engine and E85 in the same sentence. GM did proudly tell us about the GenV's DI, VVT and AFM along with the ten million hours of computer time to develop the combustion chamber and piston shapes. Odd they would tell us about that and not mention E85, if it is indeed compatible with the GenV engine.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
Melting Slicks
Joined: Jun 2005
Posts: 2,216
Likes: 1
St. Jude Donor '12-'13-'14, '16
http://www.corvettemuseum.org/regist...ash/info.shtml