[Intimidator]

If SAE has a 10% fudge factor as indicated by most, that explains it all.

[Fraxum]

I have yet to beat any HellCat at Atco counting only cars where the driver has had some seat time. Except for once where a faster HC broke an axle at the line. I beat that car by 10 minutes! Stock the Hellcat is faster in the 1/4 for sure with the same transmission. Just sayin.

I would love a HC Charger as a daily but not to replace the ZL1, ever.

[NW-99SS]

Originally Posted by Alain

Seriously !!! How the hell can he explain every hellcat dyno showing numbers that match the LT5? I don't think there is convincing him.



I think this is what happened. Dodge sent a few engines to be certified for EPA purposes or whatever the heck else they need to be certified for. Afterwards they punched up a different tune on the ECU for the production cars. I really think it was to try and please the EPA standards that were in place back in 2015.

As well as to be sneaky and take a 4300 pound car and make it do things it's not supposed to do with "707 horsepower".

Yours is one of the opinions I trust more than any in these discussions - how can one argue with an owner of both cars?

That said, those LT5 numbers going around on this thread are under the "break-in" tune where GM actually limits the power (maginally) for the break in miles.

To show I'm not just spewing BS:

From Vengeance Racing - "Since its delivery the car has had over 500 miles put on it putting it past the GM recommended break-in period, so we decided to go back to our Dyno for a comparison. If you recall we baselined the ZR1 with only 17 miles on the odometer and results were 641RWHP/641RWHP. GM suggests a 500 mile break in before going WOT, but we were anxious to see the #s early on. With 588 miles on the odometer and the vehicle still completely stock the ZR1 made 691rwhp and 676rwtq. Logging the ECU with EFI Live showed an additional five degrees of timing (15* on original baseline and 20* with 588 miles) in the calibration with inlet temps all being similar between runs. "

https://www.corvetteforum.com/forums...r1-update.html

[big dave]

Originally Posted by Fraxum

I have yet to beat any HellCat at Atco counting only cars where the driver has had some seat time. Except for once where a faster HC broke an axle at the line. I beat that car by 10 minutes! Stock the Hellcat is faster in the 1/4 for sure with the same transmission. Just sayin.

I would love a HC Charger as a daily but not to replace the ZL1, ever.

The only Hellcat I've lost to was one on slicks. Even that margin was only .05. 11.05 to my 11.10. I think the ZL1 matches up very well with the hellcat until you put a set of drag radials on them. If it weren't for torque management, i think the 2 cars would be equal with both being on tires.

[Blackdevil77]

Originally Posted by big dave

The only Hellcat I've lost to was one on slicks. Even that margin was only .05. 11.05 to my 11.10. I think the ZL1 matches up very well with the hellcat until you put a set of drag radials on them. If it weren't for torque management, i think the 2 cars would be equal with both being on tires.

How did the trap speeds compare? Just curious

[Alain]

Originally Posted by NW-99SS

Yours is one of the opinions I trust more than any in these discussions - how can one argue with an owner of both cars?

That said, those LT5 numbers going around on this thread are under the "break-in" tune where GM actually limits the power (maginally) for the break in miles.

To show I'm not just spewing BS:

From Vengeance Racing - "Since its delivery the car has had over 500 miles put on it putting it past the GM recommended break-in period, so we decided to go back to our Dyno for a comparison. If you recall we baselined the ZR1 with only 17 miles on the odometer and results were 641RWHP/641RWHP. GM suggests a 500 mile break in before going WOT, but we were anxious to see the #s early on. With 588 miles on the odometer and the vehicle still completely stock the ZR1 made 691rwhp and 676rwtq. Logging the ECU with EFI Live showed an additional five degrees of timing (15* on original baseline and 20* with 588 miles) in the calibration with inlet temps all being similar between runs. "

https://www.corvetteforum.com/forums...r1-update.html

Interesting point you make about the LT5 punching up the power after the break in period.

[NW-99SS]

Originally Posted by Alain

Interesting point you make about the LT5 punching up the power after the break in period.

It makes sense as even the LT4 is limited for the first 500 miles (tons of videos showing redline change, etc).

Not downplaying that Dodge underrates their HP ratings at all - just wanted to point out the LT5 after break-in power figures.

Edit: Again, you own a HC and ZL1 - so your opinion holds more water than most. Would love a Blue HC for a daily/road trip car!

[SecondZ28]

Originally Posted by Firehead640

I'm not sure what the big deal is anyway. The Hellcat is nearly 4 grand more than our ZL1s. Take that 4 grand and add another 100~HP

You've got it backwards...

Hellcat: $58,650
ZL1: $61,500

[Scraps0f]

Originally Posted by SecondZ28

You've got it backwards...

Hellcat: $58,650
ZL1: $61,500

What? MSRP at dodge.com is starting at $65,495, for base hellcat, $71,495 for widebody. While you are correct for a ZL1 $61,500 MSRP. Now go in and build one, $67,390 net for manual Hellcat, $70,385 net for the Hellcat A8, $73,390 Net for the widebody manual, $76,385 Net for the A8 Widebody. $63,295 net for a manual ZL1, $65.690 Net for the ZL1 A10. $70,795 Net for the ZL1 1LE.

[Alain]

Originally Posted by NW-99SS

It makes sense as even the LT4 is limited for the first 500 miles (tons of videos showing redline change, etc).

Not downplaying that Dodge underrates their HP ratings at all - just wanted to point out the LT5 after break-in power figures.

Edit: Again, you own a HC and ZL1 - so your opinion holds more water than most. Would love a Blue HC for a daily/road trip car!

I’m gonna do a little digging around for more info on this increased horsepower after break in. My 1LE now has 900 miles and I could have sworn last week the car felt stronger. I thought it was just my mind getting the best of me.

The Hellcat is a ton of fun man, elspecially as daily driver. Taming that thing is a blast........ but to reiterate, both cars are totally diffeeent animals.

[NW-99SS]

Originally Posted by Alain

I’m gonna do a little digging around for more info on this increased horsepower after break in. My 1LE now has 900 miles and I could have sworn last week the car felt stronger. I thought it was just my mind getting the best of me.

The Hellcat is a ton of fun man, elspecially as daily driver. Taming that thing is a blast........ but to reiterate, both cars are totally diffeeent animals.

Agreed - both have different missions and I think both accomplish their goals very well

Definitely look into the LT4 and LT5 break-in differences. I have first hand experience with a C7 Z06 and noted the redline change and seat of the pants power increase.

[SecondZ28]

Originally Posted by Scraps0f

What? MSRP at dodge.com is starting at $65,495, for base hellcat,

http://media.fcanorthamerica.com/new...o?id=20009&mid

[Scraps0f]

Originally Posted by SecondZ28

http://media.fcanorthamerica.com/new...o?id=20009&mid

Well that sucks for anyone who bought one in 2018.

[lt4camaro]

Originally Posted by Intimidator

If SAE has a 10% fudge factor as indicated by most, that explains it all.

SAE certified there is no 10% fudge factor, there is most likely a plus/ minus 2 % variance between the strongest and weakest . A 700 horse motor could be engine stand dyno'd at 686 for a weak motor to 714 for a strong motor over many samplings of different engines of the same manufacturer