10-31-2020, 04:15 PM | #15 |
Drives: 2021 Camaro ZL1 A10 Join Date: Nov 2018
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How about DOHC vs pushrod on an emissions per hp basis? I'm thinking DOHC designs allow for cleaner exhaust, thus, lower emissions on a per hp basis, but I am not certain. My Gen 3 Coyote (2018 GT) is an ULEV (ultra low emissions vehicle) engine, I think the LT1 in the SS is only LEV...the design might have something to do with it.
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10-31-2020, 04:21 PM | #16 |
2020 Shadow Gray 2SS
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Is the LT1 overhead cam or pushrod? I was under the impression it was a overhead cam engine...
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10-31-2020, 04:40 PM | #17 | |||
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It's a pushrod engine, a modernized version of the LSx. You might inadvartently think of the LGX that is a DOHC V6.
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10-31-2020, 07:02 PM | #18 | |
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10-31-2020, 07:40 PM | #19 | ||
Drives: 19 Chevrolet Camaro 2SS 1LE Shock Join Date: Apr 2020
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From what I am seeing on EPA, the grams CO2 per mile is ever so slightly higher on the Mustang than the Camaro, though maybe Camaro has an edge due to the AFM(I used autos for comparison). Emission standard-wise, yeah Coyote is better, but I don't know how that's calculated. https://www.fueleconomy.gov/feg/Find...40463&id=40325 Quote:
But to some fanboys, these pushrods are garbage even though some DOHC I4 engines are getting very close to LS1 weight.
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11-01-2020, 03:41 PM | #20 | |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
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Specifically, the Camaro has a 16 city/27 highway mpg (5.0 gallon per 100 miles) vs the Mustang's 16/25 (5.3 gallons per 100 miles)... yet its projected 5-year fuel cost delta is $4500 vs $2500 for the Mustang, annual fuel cost $2100 vs $1700 for the Mustang etc. This makes no sense to me. (By the way, the greenhouse gas emissions rating in this same table is 4/10 for the Camaro and 3/10 for the Mustang.)
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735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
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11-01-2020, 04:47 PM | #21 | |
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Fuel prices as they have it on EPA site. Premium: $2.83 Regular: $2.17 Camaro: 15,000/20 * 2.83 = $2,1xx Mustang: 15,000/19 *2.17 = $1,7xx 400 dollar annual difference over the course of 5 years comes out to 2k extra in fuel costs over Mustang. Ford pretty much does this across the board from what I remember. Rate for power on 93, but fuel economy costs on the window sticker off of 87. |
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11-01-2020, 06:54 PM | #22 | |
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11-01-2020, 08:41 PM | #23 | |
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It says Regular on the sheet, but I have my doubts it ran that time on 87. |
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11-01-2020, 09:28 PM | #24 | |
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11-01-2020, 09:32 PM | #25 |
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It didn't. Because if it did then they for sure would have ran 93 thru it a few times, ran better than a 12.1, and posted that along with the 87 octane run. I mean, why nerf the car and then post the results if they could have gotten better results? Unless the switchover tune is only worth a handful of HP and has no effect on performance. Which would be funny because all the Mustang guys running high octane have basically been wasting money. LOL!!
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11-02-2020, 08:14 AM | #26 | |
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For some reason smaller displacement OHC engines, can pass cold start emissions easier than larger displacement OHV engines. Why I don't know, I just remember reading the tea leaves that for the C7 Z06 they wanted to go with a modern 7.0 engine. It made the power they wanted, but it wasn't going to pass cold start emissions. So they went with boost and 6.2L So despite the fact a OHC engine may be physically larger, something about the design allows it to be more emission friendly. why I don't know that is just what I have read. |
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11-02-2020, 10:50 AM | #27 |
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If you want to talk about emissions, I wonder if the idle fuel consumption is higher with a larger displacement OHV engine than it is with a smaller displacement DOHC engine making similar peak power. There is no idle fuel consumption display on our cars.
Sent from toaster or something
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11-02-2020, 12:42 PM | #28 | |
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