|LIFE OF A GT|
|November 1, 2008 - I measured the maximum fender width of the MG at 58" front and 57.5" rear.|
That's a bit approximate, and it assumes the fenders are fully rolled. Measuring a complete Miata subframe with 205-series tires came up with 61" front and 62" rear. So I don't need to narrow things as much as I'd feared, as long as I don't do anything too foolish with wheel and tire choices.
The picture is of a tubular subframe that's made for installing an LS1 in a Miata. I'm not sure if I'm going to cut down a stock Miata part or build a tubular one like this. The latter will be more work - of course - but will offer more room. Remember, I have to narrow the track by about 3".
entry 66 - tags: planning, subframe, suspension
|November 28, 2008 - The nekkid engine bay.|
That front subframe has mounting points that are just under 19" apart. The Miata subframe? Right about 32", as the tape measure indicates. One thing's for sure, the new subframe will free up an enormous amount of room. At the expense of a small bit of work.
entry 84 - tags: engine bay, subframe
|November 28, 2008 - Here's a shot of the only MGB - that I know of - to be fitted with Miata suspension.|
The car was never completed, but it's very useful info. I've shown the rear subframe installation in the past, here's a shot of what was done up front. New frame arms. I'm going to do a little more reinforcing, especially of the upper shock mounts.
This picture also shows how much more potential space there is with the new setup. Combine that with a tubular front subframe like this one and all sort of room opens up.
entry 85 - tags: engine bay, subframe
|December 6, 2008 - The engine height was set to put the oil pan at or slightly lower than the frame rails.|
This is a bit of a guess, but I think it'll work nicely. I might be able to sink it down another 3/4" or so.
With this positioning, the engine ends up in almost exactly the same position relative to the wheels as the Miatas we do at Flyin' Miata. Only the front pair of cylinders are ahead of the wheels and the height looks to be the same. This means I could use an off-the-shelf subframe. Wow, could it be that easy?
The threaded holes in the plastic engine mean I could simply bolt up the extra oil pan. I like this thing more and more...
entry 97 - tags: subframe, engine, replica, test-fit
|December 10, 2008 - And here's what is going inside.|
I walked into the shop at work and found this behemoth sitting on the floor. I have to say, it's very handy doing this swap at home while there are two LS3 Miatas being built at work as well as a completed LS1 Miata that's undergoing constant development. That's the drivetrain from the LS1 car, removed to get new heads and a cam.
It's a pretty close match to what I'm going to use. The subframe is the tubular version of a Miata subframe, with the same control arms and steering rack. It looks as if my engine positioning will be a bit further back than this one, which helps a bit for rack clearance, oil pan clearance and weight distribution.
It sure makes the transmission look huge!
entry 104 - tags: engine, subframe, transmission, fitment
|January 9, 2009 - The upper arm is bolted onto this tube.|
It's a metric size, and there's nothing quite right available off the rack. I don't want any slop in the long bolt that runs through the tube for obvious reasons.
So I went back to the sacrificial subframe and chopped one out. Here you see the before and after. There's an amazing amount of weld on this tube, there was lots of grinding involved.
entry 132 - tags: subframe, suspension