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-   -   Art Morrison IRS, 73 Camaro (https://www.lateral-g.net/forums/showthread.php?t=45908)

zo6s10 10-10-2014 03:46 PM

Not fair putting Mary in the video's. She could drive a horse and buggy faster then most of us in AWD super car :)
Matt kicked ass on this. Now I want IRS :headscratch:

David Pozzi 10-13-2014 05:22 PM

Mary's car is developing well. We found changing rear camber alignment requires a re-set of rear caster. If the clocking of the rear hub carriers (aluminum castings) changes at all, the toe link height changes, and the toe steer can go wrong, we spent the first few events with it toeing in instead of toeing out as intended.

The car feels great now, like a Corvette, which is what we wanted. The rear doesn't get upset so easily like it did before. We really notice corner turn-in is very good.

I'm now installing one in my 67 Camaro: http://www.pro-touring.com/threads/1...tall-67-Camaro
David

Track Junky 10-13-2014 05:24 PM

Awesome Dave. Be great to see some pics. Been awhile since I've seen it.

David Pozzi 10-13-2014 05:29 PM

1 Attachment(s)
One option that was discussed with Art Morrison early on, was to replace the stock frame rails with first gen Camaro frame rails. I opted to retain the stock rails thinking it would be less work and less cutting of the car. Since it was a nicely finished car, I didn't want to do any more cutting than necessary.

Looking back on it, I would have come out with a better finished car if I had replaced the frame rails. The car would have been stronger and it took a lot of time to make up the plates and weld them in. One area that is tough to work on is where the stock frame rails turn upwards just ahead of the rear axle. There are factory overlapping flat plates welded to the floor there and they are sealed with a tar. Cutting or welding there is going to be tough because it will melt the tar and it'll burn. The frame rails would have to stick up into the car almost completely in that area. The area just ahead of what is marked "trunk profile" would need a little filler plating to support the trunk floor.
David

First gen frame rails in a second gen Camaro.

grendel 10-15-2014 10:44 AM

Quote:

Originally Posted by David Pozzi (Post 574018)
One option that was discussed with Art Morrison early on, was to replace the stock frame rails with first gen Camaro frame rails. I opted to retain the stock rails thinking it would be less work and less cutting of the car. Since it was a nicely finished car, I didn't want to do any more cutting than necessary.

Looking back on it, I would have come out with a better finished car if I had replaced the frame rails. The car would have been stronger and it took a lot of time to make up the plates and weld them in. One area that is tough to work on is where the stock frame rails turn upwards just ahead of the rear axle. There are overlapping flat plates welded to the floor there and they are sealed with a tar. Cutting or welding there is going to be tough because it will melt the tar and it'll burn. The frame rails would have to stick up into the car almost completely in that area. The area just ahead of what is marked "trunk profile" would need a little filler plating to support the trunk floor.
David

First gen frame rails in a second gen Camaro.

Very interesting, thanks for the information.

We're doing a 5th Gen IRS in my 73 Camaro... well, I guess that's the Royal "we" as I am just driving it out to Scott Mock for him to do.

I like their lower adjustable control arms. I bought all DSE upper stuff, but can't find a 5th gen lower. I wonder if an an AME would fit it.

David Pozzi 10-31-2014 02:57 PM

Here's a video on the Super Chevy Magazine test of Mary's Camaro:
I think it will be in the January issue.


camcojb 10-31-2014 04:03 PM

Fixed it for you Dave. Watched it earlier on Facebook, great video and you've got to be very happy with how the car came out. :thumbsup:

David Pozzi 10-31-2014 06:22 PM

That Super Chevy test was the first time I drove her car on track with the new IRS. It was very stable & handled all the horsepower I could throw at it.

camcojb 10-31-2014 07:20 PM

Quote:

Originally Posted by David Pozzi (Post 578328)
That Super Chevy test was the first time I drove her car on track with the new IRS. It was very stable & handled all the horsepower I could throw at it.

A properly setup IRS rides and handles great, and usually isn't as upset wth bumps and transitions in cornering. Looks like Morrison designed a very nice setup.

Rick D 11-01-2014 01:15 PM

Very nice! Dave are you guys going to Sema and the shot out with Mary's car? If so good luck!


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