[arpad_m]

Originally Posted by Idaho2018GTPremium

For what it’s worth; In Gran Turismo with a Logitech steering wheel and pedals, I grabbed my ZL1 with sticky tires and 3.0 deg neg front camber, otherwise stock, and went 7:26.4 after a couple of warmup laps. I added 150 hp (didn’t change anything else) and on my very next lap went 7:20.5. Lap after that, after getting used to the earlier brake zones due to higher speeds went 7:16.7. I think I could squeak out a 7:24 at the stock hp levels and a 7:15 at 800 hp if I drove slightly better. It’s hard to put together a perfect lap over 12.95 miles with how difficult the track is. So, I’d say on the Ring, 150 hp is worth about 8-9 seconds gain.

This is an interesting thought experiment... but even at the same power level there was a 14-second difference between he ZL1 and the ZL1 1LE, plus you aren't experiencing any g-force or fatigue or unexpected track irregularities in a computer game, no matter how realistic its physics engine is (we don't know if it's realistic at all). These deltas you concluded aren't really applicable to the real world IMO.

[Idaho2018GTPremium]

Originally Posted by arpad_m

This is an interesting thought experiment... but even at the same power level there was a 14-second difference between he ZL1 and the ZL1 1LE, plus you aren't experiencing any g-force or fatigue or unexpected track irregularities in a computer game, no matter how realistic its physics engine is (we don't know if it's realistic at all). These deltas you concluded aren't really applicable to the real world IMO.

Yeah, it was a good excuse to play GT since I hadn’t played lately. I’m no pro, but there’s definitely real handling traits happening in the game. FWIW I can grab a Super Formula Dallara chassis race car and set very similar times to Indycar qualifying laps at Laguna Seca. It’s the closest race car the game has to an Indycar.

That said, you spend a LOT of time turning and setting up for turns on the Ring, so the additional downforce, stickier tires, and the ZLE dampers are going to make a huge difference even at the same power levels. The additional power shows up on some of the longer sections, which is why I think the additional 150 hp is probably worth around 8-10 seconds.

[FarmerFran]

[SOCAL.M6.ZLE]

Originally Posted by FarmerFran

Correct, that is the OEM test we all know and love... was hoping a modified ZLE had ran the track at some point also... wanted to know what a 800rwhp would have done...

[SFV1LE]

Originally Posted by FarmerFran

Thanks for sharing this one! The Univision version had no sound. I screen recorded it and now have it saved forever no matter what GM does to try to suppress it.

[Cardiak]

Originally Posted by Idaho2018GTPremium

Yeah, it was a good excuse to play GT since I hadn’t played lately. I’m no pro, but there’s definitely real handling traits happening in the game. FWIW I can grab a Super Formula Dallara chassis race car and set very similar times to Indycar qualifying laps at Laguna Seca. It’s the closest race car the game has to an Indycar.

That said, you spend a LOT of time turning and setting up for turns on the Ring, so the additional downforce, stickier tires, and the ZLE dampers are going to make a huge difference even at the same power levels. The additional power shows up on some of the longer sections, which is why I think the additional 150 hp is probably worth around 8-10 seconds.

If only iRacing had the ZLE.

[HemiDave]

I would take a ZL1 1LE with more downforce, slicks and more weight loss (Lighter rims, rear seat delete, carbon fiber... etc) before more power to get a better Ring time.

The Viper ACR, GT3 RS formula.

[arpad_m]

Originally Posted by HemiDave

I would take a ZL1 1LE with more downforce, slicks and more weight loss (Lighter rims, rear seat delete, carbon fiber... etc) before more power to get a better Ring time.

The Viper ACR, GT3 RS formula.

That's true, but if you watch the video or know the track layout, there is a ginormous 1.6-1.7-mile back straight (from ~6:25 to ~7:00 in the clip) where the ZL1 1LE barely makes it to 168-170 mph. A car with more power could easily gain 3-4 seconds just on this straight. The track has other half mile stretches, too, where more horsepower would clearly help. Armchair quarterbacking for sure, but the numbers seem to add up.

https://www.dropbox.com/scl/fi/m4vb0...lqlj1ia9k&dl=1

[HemiDave]

Originally Posted by arpad_m

That's true, but if you watch the video or know the track layout, there is a ginormous 1.6-1.7-mile back straight (from ~6:25 to ~7:00 in the clip) where the ZL1 1LE barely makes it to 168-170 mph. A car with more power could easily gain 3-4 seconds just on this straight. The track has other half mile stretches, too, where more horsepower would clearly help. Armchair quarterbacking for sure, but the numbers seem to add up.

https://www.dropbox.com/scl/fi/m4vb0...lqlj1ia9k&dl=1

Your point is well taken.

Thats why active aero would be ideal to lessen up the downforce in the straights as well as smash the suspension in the corners like the GT3 RS.

[Iconic]

I agree that downforce hinders top speed. For reference, I took my bone stock C7 Grand Sport Corvette to the 3 mile long runway Kenedy space center and from dead stop to the 2.7 mile trap did 180 MPH. Someone brought a Zl1 1LE and with nearly 200 HP more than me did 178 MPH.

The perfect compromise might be a spoiler that changes it angle while driving. I think Porshe had this at one time.

[SFV1LE]

Originally Posted by HemiDave

Your point is well taken.

Thats why active aero would be ideal to lessen up the downforce in the straights as well as smash the suspension in the corners like the GT3 RS.

Yes if you added a high quality bigger rear wing (active aero not required), bigger front splitter, and Ohlins or MCS 3-4 ways you would improve lap times even more. This stuff will cost you $15k+ installed.

I prefer the idea of just +100-150 WHP with a relatively inexpensive E85 tune that doesn't add heat, and then keeping the rest of the car close to 100% stock. So we can prove the capabilities of the chassis and aero as designed by Chevy with a modest power increase that doesn't compromise engine life (and saves money on race gas).

If you added 300 WHP you could cross a line and be slower due to issues putting it down and compromising the E-Diff and PTM capabilities.

[HemiDave]

Originally Posted by SFV1LE

Yes if you added a high quality bigger rear wing (active aero not required), bigger front splitter, and Ohlins or MCS 3-4 ways you would improve lap times even more. This stuff will cost you $15k+ installed.

I prefer the idea of just +100-150 WHP with a relatively inexpensive E85 tune that doesn't add heat, and then keeping the rest of the car close to 100% stock. So we can prove the capabilities of the chassis and aero as designed by Chevy with a modest power increase that doesn't compromise engine life (and saves money on race gas).

If you added 300 WHP you could cross a line and be slower due to issues putting it down and compromising the E-Diff and PTM capabilities.

I think you are on solid ground with your thinking on feeding in more power until the limit is found for the chassis.
It would be definitely more cost effective to do it this way as you said.

I also feel the ZLE could easily put down more power as its set up from factory.
There's more in it as Al O said.

[ohsmily]

Originally Posted by SOCAL.M6.ZLE

Hey guys, I was just curious if anyone has seen any documented modified Camaro ZLE’s breaking the factory ZLE time set back in 2018… I know the car did well in factory form, can only imagine how much faster it would be with another 100 or 200 rear wheel horsepower….

Nurnberg Ring? Is this a Lord of the Rings place? There is no such track in this world.

To your question, I would find it largely irrelevant what some modified car, be it Camaro or Porsche, etc., can do around any particular track. There is no benchmark to which to compare it, it is not repeatable for testing in any vehicle except that one esoteric vehicle, and it isnt representative of anything except that one particular car. Factory cars, even if special editions, yield far more valuable comparison data, particularly when using the tires the car comes with.

[Camfab]

I’ve said this many times, all the times are irrelevant. A computer simulation would likely produce more relevant data.
Personally I’d be more interested in Pikes Peak times. Nothing tests man and machine better than that run. Unless you’ve driven it, you have no clue.
Don’t get me wrong, I’d love to run the ring, especially because it’s legal. I think everyone has fantasized about what a built version of their car could accomplish at the ring.