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05-16-2023, 07:40 PM
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#1 | |
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aka BeastZL1
Drives: 2019 Camaro ZL1 1LE, 2004 Cobra Join Date: Dec 2017
Location: NC
Posts: 1,135
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Video: Rotofab ZL1 Intake IAT Testing on a Road Course
I did some testing of the Roto-Fab vs. stock airbox with a Green Filter. Stephen Fitzgerald Selden has been a proponent of the stock airbox for road course duty for a while. I swapped the Roto-Fab that was on the car and put the stocker back on. The PDR captures Ambient Air Temp and IAT, but doesn't get MAT. You can get all this data in Pi Toolbox with a little work.
Results:
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05-16-2023, 09:15 PM
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#2 |
 Drives: 23 Camaro 2SS Join Date: Dec 2022
Location: Charlotte NC
Posts: 67
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Can you help me understand what is the rain guard is in the Grille?
Also, where in NC are you located? |
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05-16-2023, 09:21 PM
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#3 |
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Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,882
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Don't take those numbers seriously. Take it to the drag strip and change them, you'll have a different outcome where the Rotofab will shine especially on the big end in MPH
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05-17-2023, 07:06 AM
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#4 | |
 
Drives: 2SS 1LE M6, Palisade Calligraphy Join Date: Nov 2021
Location: Minnesota
Posts: 209
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Quote:
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05-17-2023, 08:42 AM
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#5 |
          
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,869
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Very interesting video!
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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05-17-2023, 08:58 AM
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#6 |
Drives: 2023 ZL1 Vert M6 "Sharky" Join Date: Mar 2020
Location: Earth
Posts: 4,561
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Nice. So someone like myself that just enjoys the car on the mountain roads, stay with the stock box.
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<Insert Cars You Own Here>
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05-17-2023, 11:41 AM
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#7 | |
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aka BeastZL1
Drives: 2019 Camaro ZL1 1LE, 2004 Cobra Join Date: Dec 2017
Location: NC
Posts: 1,135
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Quote:
The rain guard is a little baffle plate with three plastic clips holding it in place. One is directly behind the driver's head light and the other two clip to the radiator support.
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05-20-2023, 08:28 PM
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#8 |
Drives: 2018 Camaro ZL1 Join Date: Nov 2009
Location: Central Arkansas
Posts: 1,214
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dang. $500 and 1.5 hours install wasted. The whine is a little louder though lol
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2018 ZL1 M6 NGM
PPF and Ceramic coating IG: NGMZL1 2010 2SS RS --- SOLD MODS- Performance: BMR trailing arms & bushings | BMR Toe links | X-pipe | Muffler delete | Vmax ported throttle body | Apex "strong" MAS | Vararam CAI | Apex catch can | Kooks Headers | Kooks HF Cats | Dyno tuned by GPI 417 RWHP 409 FT-Lb Cosmetic: painted Zl1 rockers | Zl1 grill | AAC side markers | AAC LED backup lights | windows tint | taillight tint | JDP tow hook | all emblems blacked out | LED fogs |
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05-20-2023, 11:57 PM
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#9 |
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Drives: 2023 ZLE Join Date: Jun 2009
Location: Detroit
Posts: 1,717
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That’s a very interesting test. The data makes sense. I would guess the lower restriction of the Roto-Fab would be more beneficial for drag racing due the shorter run time. I do much more road course events than drag racing and may stick with the stock air box.
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03-01-2025, 10:17 PM
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#10 |
Drives: 2020 ZL1 1LE Join Date: Sep 2012
Location: Austin, Texas
Posts: 1,383
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Just came across this in a search. Was researching IATs. Glad to know the stock airbox works well.
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2020 ZL1 1LE [Moroso SC Expansion Tank, otherwise stock]
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03-03-2025, 08:46 PM
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#11 |
Drives: 2021 ZLE, C5 Z06 6.0L Procharged Join Date: Mar 2023
Location: South Carolina
Posts: 466
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I know Scott Weatherford well and his contribution to the ZL1-1LE community is unmatched.
I decided in our Project Shocker testing to use the OEM airbox for our Stage-1 test at Road Atlanta and it proved to be a great performer! I have the base RotoFab and it performs well once I am moving, but with my hood mods and higher boost, could be too restrictive to be using the OEM. However, I do see much higher initial MATs versus Project Shocker until the vehicle starts moving at higher speeds on the track. Still to date, there is not ONE company making an air intake system with a dyno comparison to the OEM filter where they didn't have the hood closed... so any data shared by dyno use is subject to failed environmental bias. |
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03-03-2025, 10:31 PM
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#12 |
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Monterey County Camaros
Drives: Stock 2016 Camaro V6 Join Date: Nov 2019
Location: Monterey, California
Posts: 536
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While just a basic RS, I remember seeing essentially the stock airbox on a Hennessy model with a cutout. I also read somewhere on Overkill’s website that if you could capture air coming up from the lower grill up the liner it helps as well.
With that, I never saw the need for an aftermarket intake (except for the tube) so I cut the bottom up, added some plastic to act as air scoops, and dropped in a green filter with a Velossatech big mouth in the front. And it’s the bottom so who cares what it looks like. Haven’t had any issues and the performance is definitely there. I took it even a step further and essentially dei gold wrapped everything from the box to the manifold. IAT matches ambient air even after hours of driving.
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