Yeah, pretty much what the subject line states. Can the addition of a front spoiler to reduce air under the car, or some other aerodynamic improvements I haven't thought of, improve ET?

Thanks - Brad

Not sure about bettering ET, but will help with top end stability.

I remember an old thread from Strokerpost, he made an air pan under the radiator that netted him a couple MPH. Some guys block off the grill also with lexan.

"Aerodynamically" lighter by about 53 pounds.

It probably depends on the car body style and how fast the car is now One of the local Pro bracket racers with a BB powered 541 C.I. Indy headed motor pick up right at .15 ET and 2 MPH ( his car runs low tens to high nines in the 1/4 mile)by putting a spoiler under the radiator cross support to block air going under the K member, he made it the same width as the front sub frames, not full width and around 5 inches deep, NHRA legal

I made these several years ago for my Dart, not sure they help any though.

E body running 100+ in the 1/8th and 125+ in the 1/4.

Which E-body?
https://board.moparts.org/ubbthreads/ubbthreads.php/trans-am-cuda-front-spoiler.html

Haha!

i did this to my car. removing the large 6 pak scoop & fitting the cowl, swapping the grille for a flat panel with decal & modifying this spoiler improved et by .15 average with nothing been done to the engine. i thought that was a good improvement

I have the factory spoiler on the front.. but I was
loosing traction at 135 and the car was REAL loose
I added a rear wing on my car and it picked up in
MPH and was way more stable.. now I'm running 152
mph and it drives great.. this is a short wheel base
car so most would think its can be unstable but its
far from it with the rear wing... I talked to the
wind tunnel guys at work to help figure this out and
I came up with a couple of different designs to ad in
the stability.. I first had a 45* angle on the back of
the deck lid then changed it over to a longer flat style
which I still run.. this was day and night different on
my short deck lid style car
EDIT
With JUST the rear wing/spoiler I picked up 3 mph and
.15 and thats all I changed.. plus it drives great now

cnc,d victors?

We ran one of the old mopar performance spoilers on our duster for years, one day at the track I was trying anything and everything to get the car to go 9s it would just hang out at 10.001 or 2. I came back and decide to take it off and try it, the car went 9.93 without it. And handled the same with or without. It's never went back on after that .. Just my experience..

Challenger, the OTHER E-body.

That's the MPH it ran with my old Stage VI heads.

IIRC the grill open area only needs to be 1/3 of the radiator core area.

if the grill opening offers "0" restriction.

Had a similar result from blocking my grill area w/lexan...........on went 10.20 something off 10.10 and picked up +1 mph iirc........

The cool ones that goes on the trunk?

Brad, i asked this question around 2005 and you replied "the comp eliminator cars have them. It must be for a reason"

No it was the one for the front .. I still have it, put it on the 68 cuda street car .. We have the one for the back but I hate messing with the car when it's working lol