chin spoiler ?
Thread Starter
Burning Brakes
Joined: Jul 2007
Posts: 864
Likes: 2
From: Jax FL
chin spoiler ?
I am thinking about installing a chin spoiler on my 04 coupe. 
Will the removal of the air dam effect the engine temps or does the chin spoiler still direct enough air onto the radiator?
thanks
Will the removal of the air dam effect the engine temps or does the chin spoiler still direct enough air onto the radiator?
thanks
Le Mans Master
Joined: Sep 2006
Posts: 9,595
Likes: 959
From: Palm Harbor not far from Sebring Florida
St. Jude Donor '11
Oldtimer
I am planning the splitter for mine, and I have been looking at the ACI. I understand that it does cause the temp to increase a few degrees. Although when I read that post, it did not say where they were located. I too am in Florida,and that is something I need to look into prior to making the purchase. On a side note, I just order a low profile rear deck spoiler (not a wing) from RPI Designs, and they are in the process of designing a true front splitter modeled after the ZR1 splitter but for the C5.
Race Director
Joined: Jan 2002
Posts: 19,557
Likes: 1,470
From: I love you & miss you Linda
2017 C7 of the Year Finalist
St. Jude Contributor
Race Director
Joined: Jan 2002
Posts: 19,557
Likes: 1,470
From: I love you & miss you Linda
2017 C7 of the Year Finalist
St. Jude Contributor
With the ACI front splitter you leave the center section of the airdam in place which is the piece that directs air into the radiator. You will lose some of the air as the ACI splitter does block some of the air heading in that direction BUT you will still be ok...
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
Former Vendor
Joined: Mar 2009
Posts: 905
Likes: 5
From: Sylvania OH
With the ACI front splitter you leave the center section of the airdam in place which is the piece that directs air into the radiator. You will lose some of the air as the ACI splitter does block some of the air heading in that direction BUT you will still be ok...
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
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Le Mans Master
Joined: May 2007
Posts: 5,383
Likes: 6
From: hagerstown md
St. Jude Donor '08-'09
With the ACI being open in the front, and having the design it does underneath the spoiler, it actually acts as a tunnel to force more air into the intake. A could litterally FEEL a difference.
You will see an increase in temps while sitting idling, or moving at a creep, but at normal speeds(and highway driving) the temp will run normal. The way the splitter goes back and butts up against the center air dam, is what causes the low speed/sitting air blockage. But, once you're moving, it directs more air to the radiator and intake.
I would recommend you change the T stat to a 160, but it isn't a necessity.
Team Owner
Joined: Sep 2003
Posts: 43,084
Likes: 33
From: Raleigh / Rolesville NC
Vortex Rammer. Same as I have on mine. Once I put the ACI front splitter on, it was like a bigger ram jet of air going into the intake.
With the ACI being open in the front, and having the design it does underneath the spoiler, it actually acts as a tunnel to force more air into the intake. A could litterally FEEL a difference.
You will see an increase in temps while sitting idling, or moving at a creep, but at normal speeds(and highway driving) the temp will run normal. The way the splitter goes back and butts up against the center air dam, is what causes the low speed/sitting air blockage. But, once you're moving, it directs more air to the radiator and intake.
I would recommend you change the T stat to a 160, but it isn't a necessity.
With the ACI being open in the front, and having the design it does underneath the spoiler, it actually acts as a tunnel to force more air into the intake. A could litterally FEEL a difference.
You will see an increase in temps while sitting idling, or moving at a creep, but at normal speeds(and highway driving) the temp will run normal. The way the splitter goes back and butts up against the center air dam, is what causes the low speed/sitting air blockage. But, once you're moving, it directs more air to the radiator and intake.
I would recommend you change the T stat to a 160, but it isn't a necessity.
these type of intake can out perform just about all other intakes, providing it is sealled very tight, and enough air gets into the radiator area that also cools the the radiator and air for the engine.
bottom view
trans cooler left- K&N filter( dry no oil) oil cooler right
Radiator in back - old pic have new Ron Davis 4 core in now
No need for 165t body as you need engine temps in the 180 to 220 range.
Originally Posted by mfastert
Won't the Vararam get more air into the engine though, vs other intakes when you have an ACI? This is what I mean't as opposed to keeping the car cooler.
Picture above does not have duct tape over the screens. There was a noticeable difference in aerodynamics above 100-150 mph when the screens where duct tape shut. ( road course only not on public roads)
My temps:
Oil temps 145-160 even on the hottest days M1 15-W50
coolant temps 210-225 even on the hottest days - water and 2 bottles of water wetter. No coolant.
Last edited by AU N EGL; Jan 26, 2010 at 03:55 PM.
Drifting
Joined: Oct 2003
Posts: 1,932
Likes: 4
From: Warrenville Il
Also with the vararam setup the air flows through the vent screens around the foglights, not under the car. The ACI spoiler will have zero impact on the flow of air to the vararam filter. People with a vortex setup will however see a difference because the car is a bottom breather which means the air intake sucks air in from under the radiator shroud, ie; the square cutout in the radiator shroud that is necessary when you install that type of filter. With the ACI spoiler it acts like a scooped lip that directs air up into the radiator area, which is where the filter is located.
Last edited by MG RED 99; Jan 26, 2010 at 04:43 PM.
the are some wise and bias opinions on this forum but by golly there is ton of awesome knowledge and expieriance.........for free 
Safety Car
Joined: Nov 2002
Posts: 4,394
Likes: 6
From: Melbourne FL
With the ACI front splitter you leave the center section of the airdam in place which is the piece that directs air into the radiator. You will lose some of the air as the ACI splitter does block some of the air heading in that direction BUT you will still be ok...
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
I ran and ACI fron splitter for 4 years on my old C5 and used the car at the track with no problems. There was a slight increase in coolant temps but nothing to cause problems..
I've been running the ACI in FL for many years now on a DD and only notice a slight increase in temps. Keep your radiator clean of debris and you'll be fine.
