JLT Intake
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Considering that the Hellcats keep the charge air cool via liquid cooling it, one has to understand that a CAI isn't going to do much if anything as the engine doesn't really on IAT the same way as an NA engine does. This is why any such "evidence" is questionable at best.
A CAI's function is to aid in the cooling of the air mass, which makes it more dense so more air can fit into a combustion chamber. When you have a liquid cooled blower providing 98% of the compression, the CAI is going to affect a very tiny bit of that compression equation. I use a JLT, for example, and I can tell you right now I didn't gain anything noticeable from it other than the louder supercharger noise and generally better under-hood visual appeal.
A CAI's function is to aid in the cooling of the air mass, which makes it more dense so more air can fit into a combustion chamber. When you have a liquid cooled blower providing 98% of the compression, the CAI is going to affect a very tiny bit of that compression equation. I use a JLT, for example, and I can tell you right now I didn't gain anything noticeable from it other than the louder supercharger noise and generally better under-hood visual appeal.
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3,735 Posts
I tested the JLT against stock air box, stock air box with K&N filter, and JLT with white paper filter. Pulls where within 15 minutes of each other, no other changes, same strap down, JLT made 15 more Hp and 10 ft lbs of Tq. I have the dyno sheet somewhere. This was on a stock Hellcat when I first got mine, it was one of my first mods.
But you wanted 1/4 mike time differences, 15 hp is going to be muddied by too many other factors to prove a gain or loss from it track wise. My .02 at least
But you wanted 1/4 mike time differences, 15 hp is going to be muddied by too many other factors to prove a gain or loss from it track wise. My .02 at least
That was exactly what I expected to hear. Thank you. I'll save the 500 and spend it on something else.
I have a 2015 hellcat. I have decided not to purchase at the moment because the "bang for buck" isn't there. Thank you for your feedback
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Once you heard the whine you’d change your whine lol
I doubt it. I have this for noise makin noise!
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3,735 Posts
NICE!!! 👍👍
~3mph improvement in the 1/2mi for the Legmaker we tested for a 2015 HC.
Stock vs. Stock w/ Legmaker
144.56 mph vs. 147.54 mph in the 1/2 mile.
www.hellcat.org
It really depends on the model year the JLT is going on. Could expect similar gains with the JLT on 2015-2018 models, but don’t see a benefit using a JLT on a 2019+ when its filter surface area and tube design are less than the OEM design.
OEM 2018 Demon and 2019+ (1048 CFM Hellcat, 1130 CFM Redeye, 1134 CFM 2020+ Super Stock, 1150 CSM 2018 Demon)
Filter: multi-layer ~141-151 sq-in filter area (depending on filter height of 7 or 7.5; air inlet sources ~151 sq-in; air box top to hood, headlight tunnel, and triangular bottom)
Tube to TBody: Rubber, 26.79 to 10.29 sq-in
Filter Surface Area:
JLT
Filter: 8-layer S&B ~137 sq-in filter area
Tube to TBody: Composite Plastic, 15.89 to 10.29 sq-in
OEM 2015-2018 (1048 CFM Hellcat)
Filter: Paper Gauze ~115 sq-in: airbox restricted to ~36 sq-in headlight tunnel and triangular bottom
Tube to TBody: Rubber/Plastic Composite 12.56 to 10.29 sq-in
Performance improvements could be expected on intake designs that are less restrictive at the filter and reduce turbulent flow vs. the OEM filter/tube for 2015-2018 and 2019+. Temperatures while stationary matter (such as 1/4mi racing) but not so much once moving; OEM and aftermarket designs see the same-close-to ambient temperatures. Some intake designs get quicker to ambient than others. These tend to be designed with less restriction and better flow than stock.
Really depends on the goal; below have been the most mentioned of the years:
References:
aFe Stage 2 (2015+)
Filter: 5-layer Pro5R - 7.13 flange (circle), 7 top (circle), 8.75 base (rounded-square), 6.75 height, 4b x 2.5t x 2h inverse velocity stack
Tube to TBody: Composite Plastic, 39.9 to 10.29 sq-in
Filter Surface Area: ~200 sq-in
Corsa (2017+)
Filter: 5-layer - 6 flange (circle), 4.75 top (circle), 7.5 base (circle), 8 height, 2.5b x 1.5t x 2.5h inverse velocity stack
Tube to TBody: Carbon Fiber, 28.27 to 10.29 sq-in
Filter Surface Area: ~172 sq-in
aFe Track Series Carbon Fiber (2018 Demon, 2019+)
Filter: 5-layer Pro5R - 7.5x5.5 flange (oval), 5.75x3.75 top (rounded-square), 9x7 base (rounded-square), 10 height
Tube to TBody: Composite Plastic, 32.39 to 10.29 sq-in
Filter Surface Area: ~227 sq-in (airbox flow restricted to ~151 sq-in; air box top to hood, headlight tunnel, and triangular bottom)
Legmaker (2015+)
Filter: 8-layer S&B ~ 159 sq-in filter area
Tube to TBody: Carbon Fiber, 28.27 to 10.29 sq-in
www.hellcat.org
Stock vs. Stock w/ Legmaker
144.56 mph vs. 147.54 mph in the 1/2 mile.
Stock Challenger Hellcat: Legmaker vs. Stock Intake
Stock 2016 (White) vs. Stock 2015 w/ Legmaker (Red) Hellcats. 144.56 mph vs. 147.54 mph in the 1/2 mile. Summary: Stock 2015 Challenger SRT Hellcat, automatic. Independent test of the Legmaker vs. Stock Intake. 93 octane, 10% ethanol. 5th gear dyno from 2590 to 6100 rpm Average total power...
www.hellcat.org
It really depends on the model year the JLT is going on. Could expect similar gains with the JLT on 2015-2018 models, but don’t see a benefit using a JLT on a 2019+ when its filter surface area and tube design are less than the OEM design.
OEM 2018 Demon and 2019+ (1048 CFM Hellcat, 1130 CFM Redeye, 1134 CFM 2020+ Super Stock, 1150 CSM 2018 Demon)
Filter: multi-layer ~141-151 sq-in filter area (depending on filter height of 7 or 7.5; air inlet sources ~151 sq-in; air box top to hood, headlight tunnel, and triangular bottom)
Tube to TBody: Rubber, 26.79 to 10.29 sq-in
Filter Surface Area:
JLT
Filter: 8-layer S&B ~137 sq-in filter area
Tube to TBody: Composite Plastic, 15.89 to 10.29 sq-in
OEM 2015-2018 (1048 CFM Hellcat)
Filter: Paper Gauze ~115 sq-in: airbox restricted to ~36 sq-in headlight tunnel and triangular bottom
Tube to TBody: Rubber/Plastic Composite 12.56 to 10.29 sq-in
Performance improvements could be expected on intake designs that are less restrictive at the filter and reduce turbulent flow vs. the OEM filter/tube for 2015-2018 and 2019+. Temperatures while stationary matter (such as 1/4mi racing) but not so much once moving; OEM and aftermarket designs see the same-close-to ambient temperatures. Some intake designs get quicker to ambient than others. These tend to be designed with less restriction and better flow than stock.
Really depends on the goal; below have been the most mentioned of the years:
- hp and dyno #’s
- sound
- appearance/build quality
- 1/4mi track time
- 1/2mi+ top speed
- faster road course corner and straight top speeds
References:
aFe Stage 2 (2015+)
Filter: 5-layer Pro5R - 7.13 flange (circle), 7 top (circle), 8.75 base (rounded-square), 6.75 height, 4b x 2.5t x 2h inverse velocity stack
Tube to TBody: Composite Plastic, 39.9 to 10.29 sq-in
Filter Surface Area: ~200 sq-in
Corsa (2017+)
Filter: 5-layer - 6 flange (circle), 4.75 top (circle), 7.5 base (circle), 8 height, 2.5b x 1.5t x 2.5h inverse velocity stack
Tube to TBody: Carbon Fiber, 28.27 to 10.29 sq-in
Filter Surface Area: ~172 sq-in
aFe Track Series Carbon Fiber (2018 Demon, 2019+)
Filter: 5-layer Pro5R - 7.5x5.5 flange (oval), 5.75x3.75 top (rounded-square), 9x7 base (rounded-square), 10 height
Tube to TBody: Composite Plastic, 32.39 to 10.29 sq-in
Filter Surface Area: ~227 sq-in (airbox flow restricted to ~151 sq-in; air box top to hood, headlight tunnel, and triangular bottom)
Legmaker (2015+)
Filter: 8-layer S&B ~ 159 sq-in filter area
Tube to TBody: Carbon Fiber, 28.27 to 10.29 sq-in
AFE CAI First Impressions
If anyone is still looking and debating on a CAI, the AFE is impressive. Build quality have exceeded my expectations and the oh so beautiful supercharger note is excellent. Cannot speak for HP increase but don’t really care because the sound is amazing. I have the stage 2 with the blue filter...
www.hellcat.org
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