I did the plastic headlight with turn signal swap so I could use the turn signal openings for the brake ducts about 10 years ago. Currently setting the ducts up on each side of the radiator as shown in the pics below. The turn signal openings are way out at the side of the car and air is moving fast horizontally due to bow wave with a splitter. Also using air from right above the splitter may reduce air pressure on the splitter a bit (less downforce). With the duct openings in the core support the tubing is shorter (less weight) and less convoluted also so flow should be smoother. Ideally the openings in the core support would have a more rounded curved entrance but I was using what I already had.

In the lower pic you'll also see a hood to core support seal, bumper bracket seal, and core support to fender seals. So the only air that gets past the core support is through the radiator or the brake ducts.

http://i240.photobucket.com/albums/f...psaxq1s3fe.jpg

http://i240.photobucket.com/albums/f...ps1zv3uuom.jpg

Good work, Bob.

Great information, John. How's the car coming along? What are your thoughts on using the grills or the bumper overhand on the later TA's like mine as air inlet for brake ducts or the engine? I'm planning at some point to close off the core support entirely like a 3rd or 4th gen to control air flow.

Dreamin Ta's
 

Thanks for the input John.... I think I am going to
stick with the turn signal ducts for now..
My splitter has an added on piece below so it is much larger
than just the normal Ta one
I was looking at closing the ends off also... maybe use rubber like you

Need to get the bumper brackets done.. big heavy ones are
not going back on... then work on the fitting the nose and glass hood

Bob

Dreamin Ta's
 

Finally got the radiator mounted up

Dreamin Ta's
 

Rear view

Nice work, Bob!

Dreamin Tas
 

Thanks Trey.. not bad for just a carpenter

Now I need to mod the hood as the back of it hits
the top of the firewall.. guess those lowered frame spacers
I put in years back lowered things just enough to cause more work

Bob

Dreamin Ta's
 

Doing a little more to reduce weight as the alum
hinges seem too costly for me

I've done things like that in the past.
Did you weight the difference ?

Since my car was fully caged I started hole sawing all the internal roof unibody parts. AFter my 3rd or 4th hole cut, I took out the calculator and figured out how much weight I was saving, after all I was cutting out 20+ 2.5" holes.
I'd spent 20 minutes cutting the first 4 holes. I figured if I cut all 20 it would save - 1.1 lbs.

I put the hole saw away.

Bob that's looking really trick. Your doing a great job.