Front Air Dam

Grabinov911 · Dec 6, 2015

Hey Gents,

I am looking for a front spoiler / air dam for my 1970 Roadrunner road-race car. I'm looking for the AAR / NASCAR-type look, and the best stuff I have found is manufactured by a company called Spoilers by Randy. The only problem is that he makes them only for the 68 and 69 cars. He told me it's only because no one has ever sent him a 70 bumper with a request for a spoiler (not because there is some special difficulty in manufacturing one for the 70). No one seems to sell one for the 70. He said if I sent him my bumper (to Arkansas), he'd be happy to make me one, but I'm hoping not to have to do that (though I might get there).

Does anyone know how different the bumper profile of the 68/69 cars is from the 70? The real question is what is the shape of the bottom bumper lip as compared to the 70. In other words, can I use the 68/69 spoiler? It doesn't look that way to me, but I've never really studied the bottom of early Roadrunner bumpers...

Thanks

Burns69RT · Dec 6, 2015

Please feel free to send him your bumper so when I get to that point with my 70 I can just order it from him lol.

This is a guy who's on here. It's his dad's car and they made this chin spoiler from a first gen Camaro I believe.

Ghostrider 67 · Dec 6, 2015

Do what I do and use the internet to look up images of both cars, ones that are staged from similar angles and distance from the camera so the bumper lengths will be close. Then save them to your picture folder and open them one at a time. Once open in your picture viewer click on the upper right to make what your looking at into a smaller window, then go back to the viewer and select the other pic and do the same thing. Then minimize the viewer and anything else besides the two pics. Click and hold on the pic you see on your screen and drag it sideways and it will reveal the second pic directly under that one. So you should end up with two smaller size pics that you can drag around to compare side by side or one above the other, and, you should still be able to use the viewer controls to make the picture subject larger/closer or smaller/ farther away to get a sense of how they compare.
Here's what I mean, this is a screen shot of my laptop screen showing two pics in separate windows of reduced size so i could compare the two pics.

Grabinov911 · Dec 6, 2015

Burns69RT said:
Please feel free to send him your bumper so when I get to that point with my 70 I can just order it from him lol.

This is a guy who's on here. It's his dad's car and they made this chin spoiler from a first gen Camaro I believe.

Eventually i may just do that!

Grabinov911 · Dec 6, 2015

Here's the bottom of a 69 bumper

Has a lot more bends in it than the 70, which is basically straight, with a slight constant curve to the rear.

And Here's the one from Andy's (for a 69).

Gonna be hard to straighten that out enough for a 70 I think.

Burns69RT · Dec 7, 2015

Yeah that'll be a tough one.

Richard Cranium · Dec 9, 2015

Burns69RT said:
.

To me, that looks as odd as this....

747mopar · Dec 9, 2015

Agreed, looks very odd. I'd check out CDR's thread, he also used one from a Camaro but must have did something differently because it looks really good on his Charger.

Kern Dog · Dec 11, 2015

Sorry to sound like a prick, but that spoiler on the Blue Plymouth looks terrible.

Dennis H · Dec 11, 2015

Is the intent for it to be functional? At what speed. I've got the chin pretty ground up on the new Challenger.

Aesthetikz · Dec 16, 2015

Here ya go:

- JDB

Grabinov911 · Dec 17, 2015

Thanks Aesthetikz. I'd say that pretty much rules out adapting a 69 air dam to a 70! Did you set those up there just for me? That was awfully nice of you...

Dennis H said:
Is the intent for it to be functional? At what speed. I've got the chin pretty ground up on the new Challenger.

In fairness, I'd say I'm largely interested in it because it will help me work toward that "road racing" look that I'm tying to achieve - the NASCAR thing. That said, if I am going to do it, I'd prefer it be functional. The Roadrunner has a very broad flat front end (obviously) and it can't hurt to keep a little air out from underneath. At what speed? I have very little experience with the car at sustained speeds above 100mph because I have only now gotten the gearing to where I could maintain those speeds. At 100mph (which isn't that fast any more given that my wife's Volvo cruises comfortably at 85 all day on I-5), the air under the car does not effect the handling in any obvious way, but I'm not trying to run a slalom at that speed either.

I'd leave it to the drag guys with trap speeds in the 130's to say for sure, but I'm willing to bet that at that speed the steering is starting to get light due to the relatively high pressure under the car. It doesn't matter (as much) on a straight track, but it might on a rally course like the Silver State.

That's my justification and I'm sticking to it as long as it looks good on the car!

Dennis H · Dec 17, 2015

Distant memory, but I had the Coronet up to about 130 once. Not the best road, but it did get squirrelly with corrections required. I think it was aerodynamics, not sure. It likes and feels good at about 105, I don't push it beyond that. See you at Track Day Willow Springs Thursday April 21?

Hemirunner · Dec 18, 2015

I've trapped 140 in mine with no front spoiler and no front sway bar. Seemed just fine.

Grabinov911 · Dec 18, 2015

Dennis H said:
Distant memory, but I had the Coronet up to about 130 once. Not the best road, but it did get squirrelly with corrections required. I think it was aerodynamics, not sure. It likes and feels good at about 105, I don't push it beyond that. See you at Track Day Willow Springs Thursday April 21?

Hey Dennis is that the Mopar day? I've been a couple times with friends in other clubs but never been to a real Mopar day...

Burns69RT · Dec 18, 2015

I'll be moving back to sunny SoCal in February, next time they have one we should all meet up there.

Dennis H · Dec 18, 2015

Grabinov911 said:
Hey Dennis is that the Mopar day? I've been a couple times with friends in other clubs but never been to a real Mopar day...

It is open. Nissan GTR's et al. Keeps the cost down. In past years, I've seen an uncapped Daytona go by wide open on the stretch near the pits. Worth the trip right there. Nothing like the sound of the mighty Mopar. Amazing just to see how much beer the pent-up Canadiens can drink.

Hemirunner · Dec 20, 2015

I think a 66 chevelle spoiler would work

Grabinov911 · Dec 23, 2015

Hemirunner said:
I think a 66 chevelle spoiler would work

Interesting... I'll get some measurements...

Richard Cranium · Dec 26, 2015

Front Air Dam

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