More aggressive Rear Diffuser options for a ZL1?

Gary H · 09-27-2019, 03:11 PM

Hi all

Is an SS rear diffuser interchangeable with a ZL1?

The reason I ask is that I've seen the V. Veloce and and the Anderson Composites (who aren't the same as ACS Composites as I just found out!), however I've just seen this one from Extreme Dimensions, however they are saying it won't fit the ZL1 on account of the ZL 1 being wider.
Now I know the front wings are, but I didn't think the rear was?
Can anyone confirm if this is the case, or any other more aggressive than stock rear valance/diffuser I could consider?

Cheers

kropscamaro16 · 09-27-2019, 03:59 PM

i dont think they are and stay away from carbon creatons there fitment and quality suck

drfeelgood · 09-27-2019, 04:38 PM

NO, they are not. The notches in the bumper are different for the rear diffuser for SS and ZL1

UFDUB · 09-27-2019, 06:34 PM

The rear diffuser is of minimal effect. To be truly helpful, you need a flat, continuous rear underbody area to get the benefit of creating a low pressure area, thereby generating downforce. The exhaust suitcase can’t be closed off to make the area flat, there isn’t enough angle to generate a lot of low pressure, and as soon as you change the exhaust and leave a large vacant area, you lose aero in that area. Needing a flat area is part of the reason Porsche just went mid engine on their race cars and why exhaust is plumbed differently on all race cars typically

fosterelli · 09-28-2019, 01:11 AM

Quote:

Originally Posted by UFDUB

The rear diffuser is of minimal effect.

I think the general market for this style of diffuser is more about aesthetics and less about aero.

UFDUB · 09-28-2019, 10:21 AM

True. I had just read a thread by someone who was more interested in track performance and somehow got crossed up and thought this topic was by the same person. Wrong audience

Gary H · 09-28-2019, 10:36 AM

Not really. A more functional rear diffuser will not make a jot of difference to us mere mortals who occasionally track for the reasons you have already stated. if I do change out my tailbox and have the opportunity to improve the underbody aero, I will. Driver training would be of far more value than enhanced aero to be to be fair.
Where racing - and every fraction of a second and tenth of a mph is crucial, then absolutely.
However from my point of view as long as it doesn't increase drag, I'm looking for something that cosmetically matches the aggression of the front. I can see the that the ZL1 diffuser extends further around the sides, so as teh market seems to be predominantly for SS models, I was wondering if they were interchangeable. If the rear bumper profile is the same, then the issue will be the slots on the side of the ZL1 bumper ( I think)
I hope that helps.

Gary H · 09-28-2019, 10:43 AM

Quote:

Originally Posted by drfeelgood

NO, they are not. The notches in the bumper are different for the rear diffuser for SS and ZL1

Thank you. By that do you mean ( as I suspect) that fitting an SS diffuser will leave slots exposed on the sides of the bumper, or are the slots along the back side completely different, so it wouldn't fit anyway, regardless of exposed slot holes?

Gary H · 09-28-2019, 04:52 PM

Thank you!

Pupilbone · 09-28-2019, 05:03 PM

Quote:

Originally Posted by ZLBlue

Saw this on an Insta camaro page a long while back. The diffuser you mentioned was fitted on a ZL1. Here's a bad screenshot i had since I lost the link to the original post

My opinion, go with Anderson Composites or ZL1addon's diffuser that bolts under our original one.

IMO the pic of that diffuser on the ZL1 looks all wrong. It simply doesn’t accentuate the beautiful 6 Gen lines... too choppy/clumsy.

Lugojf · 10-25-2019, 03:34 PM

APR Performance rear diffuser...

Tay · 10-25-2019, 08:21 PM

https://www.ventusveloce.com/collect...-rear-diffuser

EDFHOBBIES · 10-26-2019, 07:21 AM

I'll be giving my car to Trufiber next week for measurements. I bought them a Zl1 1le diffuser to make a mould with but since carbon doesn't flex they need my whole care to make a bracket or brace for the mould. The OEM plastic part is very flimsy and flexable where as the carbon is not.

Anyhow 2 options, Make it look like the OEM or give me some idea's for looks and AERO that works.

If you recall their ZL1 1LE splitter is almost identical to the GM just a 3 piece out of Carbon fiber, I also have their side skirts. So this will be the last part of the puzzle.

https://trufiber.com/product-categor...6-2019-camaro/

I'd Also like to work with them on lower splitter that goes under neath the oem one and uses the rods for support.

EDFHOBBIES · 10-26-2019, 07:27 AM

Quote:

Originally Posted by Lugojf

APR Performance rear diffuser...

Isn't this more of just a cover?

09-27-2019, 03:11 PM	#1
Gary H Drives: Camaro ZL1 Join Date: Apr 2019 Location: London, UK Posts: 304	More aggressive Rear Diffuser options for a ZL1? Hi all Is an SS rear diffuser interchangeable with a ZL1? The reason I ask is that I've seen the V. Veloce and and the Anderson Composites (who aren't the same as ACS Composites as I just found out!), however I've just seen this one from Extreme Dimensions, however they are saying it won't fit the ZL1 on account of the ZL 1 being wider. Now I know the front wings are, but I didn't think the rear was? Can anyone confirm if this is the case, or any other more aggressive than stock rear valance/diffuser I could consider? Cheers Attached Images __________________ Made in the USA. Refined in Great Britain - insta: zl1uk Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving...

09-27-2019, 03:59 PM	#2
kropscamaro16 Drives: 2016 1ss camaro Join Date: Feb 2016 Location: 909 Posts: 9,818	i dont think they are and stay away from carbon creatons there fitment and quality suck __________________ 16 1SS NIGHTFALL GRAY METALLIC WITH NPP #BECAUSERACECAR #SAVETHEMANUALS

09-27-2019, 04:38 PM	#3
drfeelgood Drives: 2017 ZL1 Convertible A10 Join Date: Aug 2017 Location: San Gabriel, CA Posts: 992	NO, they are not. The notches in the bumper are different for the rear diffuser for SS and ZL1 __________________ '17 White ZL1 A10 Convertible - TM ported TB - RotoFab CAI - 2.3" griptech upper pulley - Kooks 1 7/8" Headers with High Flow Cats - Borla S-type Catback - Audio Overhaul - NavTV M650-GM - 20" BlackDiForza- Michelin Pilot Sport4S - Tuned at BRC Raceworks (606rwhp/675trq) '14 CTS-V Coupe - ZL1 lid - Ported TB - Ported Snout - AirRad CAI - 8.66" lower - 2.55" upper- Greenbelt - SW Headers - SW Catback - Varimax Intercooler Pump - Track Attack Intercooler-Tuned at BRC Raceworks (551rwhp/516trq) '17 Maserati Levante- STOCK

09-28-2019, 10:36 AM	#7
Gary H Drives: Camaro ZL1 Join Date: Apr 2019 Location: London, UK Posts: 304	Not really. A more functional rear diffuser will not make a jot of difference to us mere mortals who occasionally track for the reasons you have already stated. if I do change out my tailbox and have the opportunity to improve the underbody aero, I will. Driver training would be of far more value than enhanced aero to be to be fair. Where racing - and every fraction of a second and tenth of a mph is crucial, then absolutely. However from my point of view as long as it doesn't increase drag, I'm looking for something that cosmetically matches the aggression of the front. I can see the that the ZL1 diffuser extends further around the sides, so as teh market seems to be predominantly for SS models, I was wondering if they were interchangeable. If the rear bumper profile is the same, then the issue will be the slots on the side of the ZL1 bumper ( I think) I hope that helps. __________________ Made in the USA. Refined in Great Britain - insta: zl1uk Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving...

09-28-2019, 04:52 PM	#9
Gary H Drives: Camaro ZL1 Join Date: Apr 2019 Location: London, UK Posts: 304	Thank you! __________________ Made in the USA. Refined in Great Britain - insta: zl1uk Velossa intake, Rotofab, Mamo TB, Custom ported NX Lid & Jokerz Full tilt ported LT4 charger, 3 port CoolingMist Meth injection - ATI 15% lower pulley, E2X CC, TSP ceramic coated longtubes, de-cat and Borla 60608 to NPP box, JRE tune, BMR rear control & trailing arms, lock-out kit, lowering springs and front strut brace, Custom carbon trim interior, Xpel ultimate front PPF and Prestige window tint with Chameleon Windscreen tint...ever evolving...

09-27-2019, 06:34 PM	#4
UFDUB Drives: Chevrolet Camaro ZL1 1LE Join Date: Jun 2019 Location: Florida Posts: 127	The rear diffuser is of minimal effect. To be truly helpful, you need a flat, continuous rear underbody area to get the benefit of creating a low pressure area, thereby generating downforce. The exhaust suitcase can’t be closed off to make the area flat, there isn’t enough angle to generate a lot of low pressure, and as soon as you change the exhaust and leave a large vacant area, you lose aero in that area. Needing a flat area is part of the reason Porsche just went mid engine on their race cars and why exhaust is plumbed differently on all race cars typically

09-28-2019, 10:21 AM	#6
UFDUB Drives: Chevrolet Camaro ZL1 1LE Join Date: Jun 2019 Location: Florida Posts: 127	True. I had just read a thread by someone who was more interested in track performance and somehow got crossed up and thought this topic was by the same person. Wrong audience

10-25-2019, 03:34 PM	#11
Lugojf Drives: 2017 Camaro ZL1 Join Date: Jan 2017 Location: Central Texas Posts: 70 View My Garage	APR Performance rear diffuser...

10-25-2019, 08:21 PM	#12
Tay Drives: 1985 Oldsmobuick Join Date: Oct 2012 Location: San Diego Posts: 157	https://www.ventusveloce.com/collect...-rear-diffuser

10-26-2019, 07:21 AM	#13
EDFHOBBIES Dyno Show Queen LOL Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014 Location: Houston Posts: 4,345 View My Garage	I'll be giving my car to Trufiber next week for measurements. I bought them a Zl1 1le diffuser to make a mould with but since carbon doesn't flex they need my whole care to make a bracket or brace for the mould. The OEM plastic part is very flimsy and flexable where as the carbon is not. Anyhow 2 options, Make it look like the OEM or give me some idea's for looks and AERO that works. If you recall their ZL1 1LE splitter is almost identical to the GM just a 3 piece out of Carbon fiber, I also have their side skirts. So this will be the last part of the puzzle. https://trufiber.com/product-categor...6-2019-camaro/ I'd Also like to work with them on lower splitter that goes under neath the oem one and uses the rods for support. __________________ Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber

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