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I'm thinking on trying another item to hopefully help the low speed drivability of my car. My present gearing setup (M21, 3.08 rear gear, and a light flywheel) is not ideal for smooth takeoffs from a stop, and while I expect a slight improvement from the plenum change, I'm thinking if I can slow...

I agree. But remember, thin titanium is more than a shim, it is a significant thermal impedance between two objects. The shims are an additional effort to keep the wheel bearings alive during track days. My front spoiler lower section is shaped to direct air to the lower control arm area, and...

I appreciate the input, guys. (y) Insulating/spacing the five areas at the lug studs would thermally be the best solution, and I can't post a definitive law of physics argument against it, but as only an electrical engineer and not a mechanical/structural engineer, I've been defaulting towards a...

Well, the temps got above 60* today so I started the engine, and to my relief no odd noises or smoke out of the tailpipes, so it looks like there wasn't any major trash inside the intake that escaped all the vacuuming I did during the grinding and filing stage. Once things warmed up a touch I...

While waiting around for the weather to warm up so I can get back to working on improving the idle quality of my antique, my mind wandered to a short project to do in the meantime. I'm thinking on making a couple .040" titanium or stainless (whichever machines easier) rings to insert between the...

Well, got the divider welded in, using the spool gun (no plenum explosion or fires during the process, thankfully). Some of the welds look okay, but others weren't terribly pretty as I had to weld blind with the nozzle blocking my view of the arc. I'll get my shop vac and air grinder hooked up...

Well, spent some time brushing off the dust and rust from not TIG'ing for a few years. After all this time and work to get to use the TIG welder, I think I convinced myself to use the MIG spool to weld the divider in. I don't think I am coordinated enough to work the TIG torch with one hand...

Well, struck out at a couple of the local home improvement stores trying to find the right pieces to make my adapter cord. Tried McMaster-Carr's website last night, and for some reason the parts/pieces were outrageously expensive, Got one more big store to try, and also an electrical supply...

Well, as usual, things aren't going as smoothly as I think they should. I cut and filed a new divider for the plenum, and the next steps are cleaning and masking the plenum area to keep trash out of there while I'm welding. I removed a few years worth of dust off my TIG machine, and prepared to...

I've got two lithium batteries presently, AntiGravity brand. A 5.7# 880 CA in the Corvette, and a 1.4# 150 CA in my perpetually disassembled Triumph 900 cc bike. These batteries seem to have minimal self discharge rates. And the nice thing is, when (not if) I forget to turn off an electrical...

We're finally in a warm spell this week, in the 60's today. I started up the car this afternoon, and two observations. The four year old 5# lithium battery, despite sitting for the past five months without any trickle charge, cranked the engine over just fine. I continue to be rather impressed...

An item I fabricated a couple years ago was an aluminum cross shaft (bellcrank) for the clutch linkage. It's not NCRS compliant, as a couple of the physical dimensions differ from the stock steel piece, but it bolts in the same as the stock piece, and has (thankfully) worked at track days the...

I wrapped the length of the steel tubing (from the header collectors to the start of the aluminum tubes near the transmission mount), I don't presently have the courage to (thermally) insulate the aluminum tubing portion. I bought the ribbon type wrap and a pair of the insulators that Richard...

In the event that I happen to get a sudden burst of motivation and energy this spring, I thought it might be prudent to have a set of intake gaskets handy. I went on our favorite online auction site and I can't believe the price of the gaskets these days. Most are at least twice as expensive as...

Thanks for the input, guys. I appreciate it. As much as I enjoy making performance/weight improvements to my car, I have an equal amount of dislike for spending time to repeat tasks or rectify my mistakes (given my track record of mistakes one would think I should be used to this by now;)). I...

I removed the plenum divider a few years ago to see if there was any resulting upper RPM power gain. According to my buttometer it may have helped. But, no pun intended, the idle quality really took a hit, probably from cylinders 5&7 interacting in the plenum. So, I want to weld a divider back...

Guys, thanks for the suggestions. The various insulating materials look reasonable in price. I'll pick up a variety of those to experiment with. Thanks again. (y)

Unexciting update, but I have a question. I now have the back half of the exhaust system rubber mounted/isolated, but am presently scratching my head on the front, specifically the hard mounts outboard of the transmission mount. I realize there's some bracket isolation at the transmission mount...

Timing belt, that's a rather novel idea. (y) There's tons of them just laying around at my favorite junkyard. Next trip there I think I'll pick up a couple for material to try some things. Thanks!