Getting ready for our 1st AS outing

[jkopp]

I'll dig at the store tomorrow to be sure but from memory the louvered part was an insert on early (like 1982-1983) Z28's. The bumper cover was still the same P/N regardless. I'm not 100% on this but it something along those lines.

[kbsmith1]

Regarding the picture of the yellow camaro and the inquiry
about whether it is legal.

It was my car, and yes I believe this is completely legal
by Kyle's (the most strict, and I believe, correct) interpretation
of the AS rule book.

The bumper cover is from a 82-84 berlinetta model, specificly chosen
for the big holes in it directly in front of the radiator. It used a stock
aluminum bumper support, and the plastic honeycomb to support the bumper
cover. The front
air dam was built on top of the stock radiator air dam and extended
down as far as legal (no lower than the bottom of the rims at
resting ride height).

For me, with a good radiator (Ron Davis 31" x19", fits in unmodified
opening), this would keep my car at or below 190 on 100 degree days.

I am still working on finding something for my Gen 4 firebird that works,
and have tried a big splitter with an air box with all the stock body work.
I got a ton of air in, massively pressurized the box in front of the radiator,
but cooling still wasn't that great. Biggest radiator that fits in this (right now)
is about 27.5 x 16. Looking at old JH camaro that came up here to the NW,
he has a HUGE visteon radiator/oil cooler in that. I suspect for Gen 4 a really
massive rad is necessary to cool in 100 degree temps, and that it is very hard
to get good airflow to the radiator. It all must come up from the bottom,
and the whole opening isn't terribly large.

[jimwheeler]

Kevin,
You are talking about the 03 car, correct? If so, I see no problems with that front end. The center section has not been cut out. That piece is what this thread has been all about.
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[kbsmith1]

Yes, talking about the 03 yellow camaro.

We are in agreement that there is nothing that seem illegal.

Also note, there is another 03 in the rotating pics that is my newer
Gen 4 fbird, and it's yellow also. That is the one I am still working
on figuring out how to keep cool in hot weather.

[jackmartin]

Ken,
I also have a 4th gen Firebird. I ran at Hallett last Sat. at 98 deg and high humidity. The temp stayed below 210 the whole day. Oil was 250 though.
I have an Aeroquip water-to-oil heat exchanger, no oil cooler. All the air is ducted up from below the bumper cover. There is aluminum extending down from the nose from the wheel opening to inline with the side of the radiator. Then it extends back to the base of the radiator and goes across the base of the radiator. I will try to get a picture posted. The side of the radiator is well sealed with insulation and tape.
Jack

[kbsmith1]

Jack, I'd love to see a picture of the aluminum you are describing. Also,
what kind, size, number of rows, etc of radiator are you running? Is it a dual
pass radaitor?

I am currently using a Griffin 27.5x15 two 1.25" aluminum tube radiator. With
my oil cooler disconnected, and removed I was running 260 oil and
195 water temp on a 70 degree day over July 4th national races. I am
racing some regionals in a couple of weeks. I have put the oil cooler back on. I took it off to see if it was blocking air flow to the radiator. It didn't seem to make any difference in water temp, but definitely raised oil temp about 20-30 degress. So depending on the outside temp I will see how the
current setup performs. I expect oil temp of about 240, but want to get
water to stay at about 200 even on hot day. Previously, water went more
into the 220-230 range on a very hot day.

[jackmartin]

Ken
I'll check it out tonight and take some pictures
Jack

[PAINLESS]

So based on what I have read here this is an example of how not to do it? Temp never goes above 180 though.

[kbsmith1]

Yes, I believe that is illegal due to having cut out that huge section
of front bumper (and bumper support also, which might help front-end
weight as well).

[jimwheeler]

Kevin is correct. Personally, I think it makes sense on this car, but if we open this up, you can cut up the front of all the cars. Don't know if you all want the class to go that way.
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