Mounting a Tranny (cont'd)

Further progress was made Sunday. Now all that's missing is the 1x1 crossbeam that will be welded to the chassis, and the drilling of the bolt holes. Oh, and the mounting bracket will get a gusset in the "elbow" of the L to reduce stress on the weld. Unfortunately this part of the bracket has to clear the speedometer cable so I can't make the gusset as beefy as I would like. The transmission will be isolated from the chassis by 1/2" rubber bushings made from a hardware store rubber stopper (not pictured).

Bracketeering

After a short while off, the Seven is getting attention again. On Father's Day I finished the engine mounts, and this morning I lowered the engine/transmission into place. It fit nicely, exactly where I intended. That feels pretty good :) Next, I began work on the transmission torque mount. I cut out a cardboard template that I will use to make the upper and lower mounting "ears" of the bracket. Again, the metal is 1/8" steel plate. Holes are 1/2".

Next will come a piece of angle iron welded to the rear edges of the upper and lower ears, and the angle iron will be bolted to the chassis. If this is not totally clear, just wait -- you'll see soon enough!

From the depths of the C...

So, you're guessing that the project is gone, sold, forgotten, or abandoned. WRONG! I've been busy with some other stuff, including work on my new $1600 daily driver:

We needed to cut expenses, and the WRX (*not* the Se7en) was the logical place to cut (see, I think you'll agree that my priorities are in the right place).

We've been busy with visitors, and I've been doing some maintenance work on the 318i. It still needs struts and control arms to be installed, which I will do next weekend since I have 3 days off. But I did do some work on the Se7en this weekend. The engine mounts are finished, and I can move onto the transmission mounts! I did some cutting and welding (and re-welding) on the mounts, so that they will now allow the engine to be lifted free of the car when the bolts are undone! Good idea, I think. I'm also pleased that I finally figured out the proper setting on the MIG so that I get good penetration on my welds. The welds on the mounts are BEEFY.

It's In, I Swear!

Here are some random pics of the engine and transmission in its final position. I still need to make the transmission support bracket.
























The normal 1.5 - 2 inches of sump hangdown that you get with a Miata engine:











Plenty of room for a nice steering column setup. The gentleman who built this chassis offset the transmission tunnel to the right a tad, to enlarge the driver's area. Good idea for a number of reasons (though it did make positioning the engine/trans take a little more brainpower than it otherwise would have).

...and We're Back.

Sorry for the delay in posts, dear readers (assuming that any of you readers out there actually anticipate the next entry). No, I haven't stopped work on the Se7en! I've just been a bit busy with work and haven't posted any blog updates.

So... developments since the last post:

1. My friendly neighbor and fellow GRMer (http://www.grassrootsmotorsports.com/) Jason is stripping down a Miata to make a track car, and in the process he's removing all of the "soft bits" as well as putting some proper wheels and tires on it. Ergo, he's graciously offered to give me, free of charge, his "daisy" Miata wheels w/ roll-around tires, the gauge cluster, and the speedo cable. [Jason is also selling his racecar Se7en (bike-engined no less), so there will not be the unlikely coincidence of two Se7ens in the same neighborhood.] His generosity will afford me more money in the budget for other things, though I am not quite sure where it will be used.

2. I got a new throttle body to replace the one mashed up in the donor car's wreck:













Unfortunately, the back side looked like this:












After some scrubbing with carb cleaner, it was much better:












3. Engine mounts are progressing nicely! Holes were drilled, the engine/transmission were positioned, and the mounts were tacked into place:












Unfortunately, the one slot I put on the passenger's side mount was not large enough, so I'll need to elongate it.

Footwork

Got a lead on some Miata wheels and tires for cheap:

Going this route to start off with will give me an extra couple hundred bucks to use elsewhere in the build. I should pick these up tomorrow, which will allow me to approximate my chassis ground clearance and therefore set how far my oilpan hangs off of the ground, which will in turn dictate where to position the engine mounts to achieve the aforementioned clearance (mounting them closer together will raise the engine, while spreading them apart will lower it... since I haven't drilled any holes yet). Whew, this car buildin' stuff is complicated!

Mounting Workload

Yesterday I got a few hours in the garage, so I began work on the engine mounts, the next critical step on the Se7en. So much relies on the placement of the engine.

Engine and transmission unit were dropped in place so that I could take the necessary measurements to place the engine the proper distance from the firewall.

3" width by 1/8" thickness bar stock was cut into mounts. I measured the mount angle at 58 degrees from horizontal (32 degrees from vertical).

I then rigged up a wooden jig that allowed me to clamp the steel such that it could be welded.

Almost finished. I welded the front and back sides... if you can call these welds. The backside welds are very beefy, but I'm going to grind down portions of the fronts and re-weld them. They will also get a little gusset along the top to prevent flexing.