Art Morrison IRS, 73 Camaro

[Ron in SoCal]

Thanks David. Great to see a straight up review.

How's the First Gen coming? I think we need a project thread on it

[David Pozzi]

Originally Posted by Ron in SoCal

Thanks David. Great to see a straight up review.

How's the First Gen coming? I think we need a project thread on it

Ron,
I have my rear IRS in the shop for my 67 Camaro & will begin the install within the next week. I've been told there is very little cutting needed compared to a second gen. My engine should be done in a month so I can start building my headers then. It's a tall deck RHS block. I think I'll get it running before doing the body work, then finish the fenders to suit my wheels and tires, then tear it down over winter and paint it. Autocross is ending at Marina by the end of the year and I'd like to run the car a few times locally & work on the setup before I have to start towing longer distances to events. If I don't get it running by late year, I'll just paint it, then run it next year. I'd love to have it in good shape for the USCA events next year.

I'll start a project thread when I make some progress on the IRS install. Not much to see right now except the junk I'm throwing out/moving in my shop, I'm making room so I can move my Camaro around.
The nice thing is, our cars will be the same under the skin, Although I'm running the LG drop spindles and Mary isn't.

Morrison recommended I get new frame rails with my IRS. They make their own first gen frame rails. The assembly comes as shown below and I was advised to fit it in the car as a unit. They recommend cutting out the factory frame rails but leaving the spot welded flanges in place. This gives a thicker area to weld the new rails to. I'll sand blast the stock rails before cutting. The paint on Mary's frame rails was tough to remove, it's whatever JCG used.

The suspension comes aligned so you can measure from the hubs to the fender openings to get it centered up.
My IRS:

[Damn True]

Originally Posted by David Pozzi

Autocross is ending at Marina by the end of the year and I'd like to run the car a few times locally & work on the setup before I have to start towing longer distances to events.

HOLD THE PHONE!

WHAT?!?!?!?!?!?

[Track Junky]

I'm speechless. What an intense set up.

[David Pozzi]

Originally Posted by Damn True

HOLD THE PHONE!

WHAT?!?!?!?!?!?

FAA is tightening security. I guess Autocrossers are a risk. There is SO little going on at that Airport it's pathetic!

[Damn True]

Originally Posted by David Pozzi

FAA is tightening security. I guess Autocrossers are a risk. There is SO little going on at that Airport it's pathetic!

What a load of crap!

What's left? Oakland, GG Fields, SJCF and Mather?

[Damn True]

I haven't been down there in over a year but $1 to a bag of donuts there are houses going in near that parking ramp sometime soon if construction hasn't already begun.

I can't figure out how to get ahold of Jesus Villareal, thinking maybe you and Mary know him. At any rate, Tesla now runs the old NUMI plant in Fremont. They aren't using the big North lot. Might be a chance they'd be amenable: https://www.google.com/maps/place/45...6e26a14c243e97

Pacific rail depot in Milpitas (pretty sure this is still in use though): https://www.google.com/maps/place/65...8e66bfd64ef337

Also in Fremont, this lot isn't far from NUMI and IIRC used to belong to NUMI as well. Access appears to be via the wrecking yard property to the North: https://www.google.com/maps/place/67...6db48f4e2af05f

The holy grail is of course Moffett Field. Now that Google runs it perhaps there might be a chance?

[David Pozzi]

Marina city wants us, FAA which is federal does not. The city makes some money off autocross, FAA doesn't make a dime & could care less what we want.
Houses will be built closer some day, but it's a long way off.

[eliterides]

Hi David ,

looking for some expert advise.

I want to build a first gen camaro next year.
What would you recommend for front suspension to best match with the Morrison IRS.

Project will mainly be used for street / highway very occasional track day, we don't have as many autocross events as you guys.

How is the Morrison IRS price wise compared to the RS Fast track IRS.




John

Originally Posted by David Pozzi

Ron,
I have my rear IRS in the shop for my 67 Camaro & will begin the install within the next week. I've been told there is very little cutting needed compared to a second gen. My engine should be done in a month so I can start building my headers then. It's a tall deck RHS block. I think I'll get it running before doing the body work, then finish the fenders to suit my wheels and tires, then tear it down over winter and paint it. Autocross is ending at Marina by the end of the year and I'd like to run the car a few times locally & work on the setup before I have to start towing longer distances to events. If I don't get it running by late year, I'll just paint it, then run it next year. I'd love to have it in good shape for the USCA events next year.

I'll start a project thread when I make some progress on the IRS install. Not much to see right now except the junk I'm throwing out/moving in my shop, I'm making room so I can move my Camaro around.
The nice thing is, our cars will be the same under the skin, Although I'm running the LG drop spindles and Mary isn't.

Morrison recommended I get new frame rails with my IRS. They make their own first gen frame rails. The assembly comes as shown below and I was advised to fit it in the car as a unit. They recommend cutting out the factory frame rails but leaving the spot welded flanges in place. This gives a thicker area to weld the new rails to. I'll sand blast the stock rails before cutting. The paint on Mary's frame rails was tough to remove, it's whatever JCG used.

The suspension comes aligned so you can measure from the hubs to the fender openings to get it centered up.
My IRS:

[David Pozzi]

We are using the Morrison front sub for both Mary's 73 Camaro, my 67 Camaro, and James Shipka's One Lap Camaro (67) OLC has the Lateral Dynamics 3 link and he just ran at the USCA event at Laguna Seca. I'm sure he will agree the car is the best it has ever been. The IRS will work with any front suspension you choose, even stock, but on a First Gen Camaro, the extra tire room an aftermarket sub provides is a big improvement in getting adequate rubber up front.

Here is a quote on pricing from Craig Morrison that was posted on Pro-Touring.com

Ok, so going back through this thread, the one thing I wanted to address is the pricing. When Super Chevy did the story on Matt's car, it was in the advanced prototype stage and we had no clue as to what the price was going to be, so with a best guess I put a number together. Please keep in mind that that also included the entire rear weld-in subframe for a 1st Gen car as well.

So, for what we have available now here is the pricing and component breakdown:
IRS Cradle
Strange S60 differential
Upper control arms
Front lower control arms (with Johnny Joints)
Rear lower control arms (with Johnny Joints)
Toe link kit
5th Gen Camaro knuckles machined to accept C6 hubs
C6 30-spline hubs
5th Gen Camaro parking brake kit
Two-piece adjustable sway bar
Cradle bushing kit
Driveshaft Shop 30 spline axle package w/ 930 CV joints
JRI non-adjustable monotube coil-overs
5th gen Camaro disc brake kit 12.4" rotor

This package (which is rated at 1400+ RWHP) is priced at $11,500
This IRS package can be added to any rear subframe or chassis in our line-up. We also have sold a number of these packages with loose brackets so customers can graft it into existing chassis and subframes. There are also numerous options available on the shocks and brakes.


The two biggest pricing factors in this IRS is the Strange S60 center and high HP Driveshaft Shop axles with the 930 CV's. We are going to be offering a package very shortly with a few different options for OE Camaro diffs as well as a more affordable axle package from Driveshaft Shop - power rating should still be in the 700-800 RWHP range.

Hope this answered a few questions regarding the pricing... Any more please let me know.

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http://www.artmorrison.com
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