Does anyone have a copy of the Mariah Mode Four Front Bumper/Airdam installation instructions?

I emailed Rotary Engineering directly, however I didn't get a reply.

 

Can you post a picture of it to get a better idea. I had an airdam on my previous 1st gen and rememeber it was as simple as sliding it in and then having two screws holding it on the fender. I don't remember if it was a Mariah or other brand.

 

Mounting a Mode4 requires cutting the stock "ears" off of the mounting shocks, and then drilling 4× holes for bolts to attach a flat angle aluminum plate between the bumper shocks on which the fiberglass Mode4 airdam sits. It's pretty straight forward, as the only other bolted mounting points are at the fronts of the fender wells, which holds the Mode4 in position.

There are a few other facets to getting the undertray to line up, but it's not necessary to run it. The Radiator and Condenser get plenty of fresh air underway. As a sidenote, the Mode4 design doesn't come with the brake cooling ducts cut out, as they were originally designed as driving light buckets. Once you cut these out, the fender liner prevents linear flow of incoming cold air to the brake assemblies, but is quickly remedied with a carpet knife (*if you don't care about cutting up your fender liner). I've had several airdams over the years, and the Mode4 is my favorite.

P.S. - I spent some time out in the garage looking for my set of installation instructions and couldn't find them in the usual places. If you have the installation kit, post some pictures of what you've got, and I'll help you make heads and tails of it. The install isn't hard at all. In fact, when towing on a flatbed with a high angle entry, it's almost easier to remove the Mode4 bumper than it is to crib ramps to avoid dragging.

 

I run my business out of the old Mariah Motorsports building. I may actually have actually seen one of those angle pieces the other day - I'll look tomorrow - I doubt there are any instructions still in the building though.

 

I have a brand new unused Mariah Mode 4 in the barn. I dug up the front bar and supports and instrution manual.

 

 

Way to come through on it, man! Reading hose instructions brought back memories. One consideration for OP is that the Marian Mode4 covers the front side marker lamps under the fiberglass. This may not matter to you, but they become inaccessible once the Mode4 is in place. If you remove the bulbs from the housings, you won't have to think about them again. (*These aren't turn signals, just side markers...).

Let us know how the install goes,

 

LongDuck .. that's the right one!
I purchased mine directly from Mariah Motorsports about 3 years ago. No hardware, brackets or instructions included. It may have been one of the last ones made.

dguy .. that would be amazing if you find any of the angle pieces or hardware left. Please keep in touch and let me know what you find.

KansasCityREPU .. you've got all the best stuff for 1st gen RX-7's. Let me know if you would be willing to send me the measurements of the brackets so I can try to reproduce them.

I'm going to try to reproduce the original instructions as best as I can, and archive them on this site for future 1st gen RX-7 enthusiasts.

 

The aluminum angle-bar for the mounting on the bumper shocks is the important one; I don't think I used any of the other smaller bent steel brackets, and once you get under there, you'll be able to see that the Mode4 has plenty of support in the fiberglass without them. It's not like you're going to be using it as a push bar or a cattle plow. The important take-away in KansasCityREPU instructions are the angle cuts for the shock mount faces, the dimensions for the flat plates, and those corners of the body that have to be folded back. Those things alone probably saved you hours of time and effort.

As mentioned above, without an airdam these cars generate lift under the front body that results in light steering feel above about 80mph, and gets worse the faster you go. Any airdam immediately nails the front down at high speed, but this bumper is durable, effective for brake cooling and intake air to the radiator, and looks good doing it, too.

Are you balancing downforce with a wing or spoiler of any kind at the rear?

 

I can get some printer scans of the document and post. I'll also get some cad drawings made up of the brackets in Fusion360.

 

If you bought it 3 years ago (and unless you came in and I pulled down an old one from the shelf) it was purchased from Brandon with the somewhat rebooted Rotary Engineering. Mariah has not been in business since Jim Hagerty died and I was asked to move in by the current owner of the building. Small distinction but I think its important to point out.


Yahtzee... DM me and we can figure out logistics.

 

This message board has been such an amazing resource for building/rebuilding and troubleshooting our 40+ year old 1st gen RX-7's.

dguy .. the name Brandon is still listed on the Rotary Engineering website, so that is most probably who I reached out to when I bought the Front Bumper/Airdam around three years ago. Looks like I rolled the dice, got five of the same number, and got a Yahtzee!

 

That barn of KansasCityREPU's must be a sight to behold with the number of things he manages pull out of it on a regular basis.
;-)

 

dguy .. thanks so much for finding those brackets. I wonder if those are the ones that Rotary Engineering was suppose to have shipped with my order.

Let me know how much you need for the brackets plus shipping to Canada.

PM sent with address.

 

I found this old 2019 thread that has a good set of install instructions and advice. https://www.rx7club.com/1st-generati...umper-1138691/