Targa Miata
MIATA BUILD
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June 8, 2008 - I spent some time patching up holes.
I think the exhaust fumes were affecting us pretty badly in the car on the way home. Cracking the windows open actually caused a problem, as it would pull air into the car from all the holes in the transmission tunnel. Very hot air. I usually drive the car fully closed up or with the windows fully open, so I'd never noticed this before. It's easy enough to fix. Small holes got rivets, big holes got rubber plugs.
While doing the diff swap, I also crawled underneath and took a good look for holes. I found quite a few, actually. The car had an Autopower roll bar in its previous life so there were 8 or more holes left over from that. There were also a number of unused bolt holes that I covered with waterproof foil tape. It should make a big difference.