FVS - the missing ducts?

[Manta Ray]

FVS, does this picture possibly show the rear quarter panel ducts (covered by camo) that you've expected to see on the C8? It almost looks like there's a very narrow and long outline on both sides on the quarter panels near the fenders if that makes sense.

[John]

I can not answer to FVs, sure do not have his expertise, but if there are NACA ducts on the top of the rear renders, at least re the C7’s, they are used to force air into the heat exchangers for the trans and diff coolers.

It just does not seem logical to me that they would be running at a really good clip at the Nurburgring with those blocked off. Unless, one of two things: It was cool in Germany the past week, and/or the camo is a partially breathable material, so air, with a reverse fan behind those ducts, still can be sucked through the material to do some amount of cooling.

I too am interested in FVS’ thoughts on this.

[RoketRdr]

IMO I don't think there will be any. Most ME's don't have them and either use the side or quarter intake ducts for engine intake and engine bay air flow. The Corvette uses those rear fender NACA ducts for the trans and diff coolers at the rear. With side or quarter intakes on the ME's its already achieved. Look at the pics from when they first showed up at The Ring. Even with the camo you can see there aren't any intake ducts on the rear quarters. Its certainly possible that they can add them but I don't think they will be necessary.

[fvs]

I think those features that you are seeing in the top images are just shadows. In the close up images above, there is no evidence of any openings for the BACCA vents.

it is odd and still remains a question why the CAD drawings show a definite ductwork almost identical to the C7 with the vent beginning at the front of the rear wherl well. From what I can tell, this position would mean that the duct would need to be cut into the rear hatch rather than the rear fender as on the C7. In the close-up rear image of the sea eight, you can see the rear hatch line coming down from the rear quarter window and following along the top outer edge of the fender

Maybe the CAD drawings are from a different model with different body panels or slightly different design.? Apparently our two eyewitnesses have seen a model with hood vents yet the Ring cars show no sign as yet.

as far as a necessity for these vents. I have heard that there were cooling problems with the C7 z06/ZR1 so I would think more cooling potential is better than less.

perhaps we will see the vents show up at some point. Would not be too difficult to hide them or cover them up but as said above, why would they?

[RoketRdr]

I think those features that you are seeing in the top images are just shadows. In the close up images above, there is no evidence of any openings for the BACCA vents.

it is odd and still remains a question why the CAD drawings show a definite ductwork almost identical to the C7 with the vent beginning at the front of the rear wherl well. From what I can tell, this position would mean that the duct would need to be cut into the rear hatch rather than the rear fender as on the C7. In the close-up rear image of the sea eight, you can see the rear hatch line coming down from the rear quarter window and following along the top outer edge of the fender

Maybe the CAD drawings are from a different model with different body panels or slightly different design.? Apparently our two eyewitnesses have seen a model with hood vents yet the Ring cars show no sign as yet.

as far as a necessity for these vents. I have heard that there were cooling problems with the C7 z06/ZR1 so I would think more cooling potential is better than less.

perhaps we will see the vents show up at some point. Would not be too difficult to hide them or cover them up but as said above, why would they?

The ZR1 doesn't have cooling problems. Those were remedied by opening up the air intake sections on the nose and the 13 heat exchangers. The rear ducts on the Z06/ZR1 are for the automatic trans and diff coolers not the engine. ME's airflow/cooling is completely different. Part of the engine cooling comes from the side intakes forcing air through the engine bay and out the back of the car. That's why you don't see rear quarter ducts on ME's because there is adequate airflow through the rear from the side intakes and they're not trying to cool an automatic trans. Some of them, like the Ferrari 488, have the air intake partially in that location already.

On a side note...I'm starting to suspect that most of those CAD leaks were on purpose. They clearly show a ZF trans but sources say Tremec is the vendor that's the chosen provider. And like you said, they also showed rear ducts similar to the C7 but they aren't there now and now really needed.

[JB]

Surprisingly no top of the rear fenders or rear hatch on the c8.

the cooling issue must clearly have addressed in other ways.

maybe the wide body will have them?

[Quinten]

I think that FVS made a good point about the hood vents and NACA ducts being features of high-performance models. The Z06 was a subject of many leaked CAD images, considering the appearance of turbochargers and the fact that the ZR1 isn't even in development yet. Ducts and large vents may not be necessary on a base model car with a naturally aspirated engine and 4-piston brakes with smaller rotors. If the C8 follows the C7 production schedule, with the Z06 being introduced in the second year, we should actually be seeing the Z06 models testing sometime soon.

[JustOneMore]

[QUOTE=RoketRdr;n9222]


On a side note...I'm starting to suspect that most of those CAD leaks were on purpose. They clearly show a ZF trans but sources say Tremec is the vendor that's the chosen provider.

If your suspicions are correct, the fact that they show no provisions for a manual could also be misleading.

[JB]

Of.course there will be a manual transmission ..what corporate executive is going out on a limb with a new Corvette and say...let's turn off 23 percent of our current customer base..

Mislead misdirect, sell more c7 s are all reasons for the various misdirection...via the tool known as the internet .

Jmo and.always good discussion

[John]

My thought sexactly RoketRdr & JBsC6, that we could well see them, why they are in the CAD drawings, for the 2021+ high performance versions.

[fvs]

Anything is possible. All the possible scenarios everyone described could come to pass.

Most other CAD details have been proven out by the test cars so far. Could have been revised. Could be a HP model. We shall see and be surprised!

[Ronstar]

could the ducting be fed through the side scoop instead of a vent on top of the fender?

[ABorC]

Of.course there will be a manual transmission ..what corporate executive is going out on a limb with a new Corvette and say...let's turn off 23 percent of our current customer base..

Mislead misdirect, sell more c7 s are all reasons for the various misdirection...via the tool known as the internet .

Jmo and.always good discussion

I wonder how that conversation went at Lambo, Ferrari, P-car etc.

[fvs]

could the ducting be fed through the side scoop instead of a vent on top of the fender?

It likely is. The 488 Pista splits the air on each side to do thaw same thing.

The curious thing is the CAD image that shows the top fender vents and ducts.

I guess we will need to wait a bit more.

[John]

could the ducting be fed through the side scoop instead of a vent on top of the fender?

Often the primary side intake on an ME, is split into two chambers. Ronstar, you well could be totally correct. Think that is a good possibility on the 2020 Corvette ME — if that additional entry air is needed at all for the roughly 500 HP motor/powertrain.