I’m replacing the stock ZR-1 front brakes with an updated design from a C5 ‘vette. The C5 calipers are stiffer and better at heat management, they also have a bigger pad area and so provide an increase in braking of around %30. Pretty good for a cheap upgrade. The calipers came from my good friend, Ron, for free. I just need some rebuild kits – seals and so on to make them as good as new.
I’ve looked at various options for updating the brakes. There are a number of systems available but the prices are high – anything from $2k and up! If this were a track car I’d certainly be looking at these alternatives but it’s basically a cruiser, so the C5 is a good cost-effective upgrade.
I’m going to finish them with caliper paint from G2. This is a high ceramic, high temperature paint especially designed for this application. Many people get their calipers powder coated but I don’t have anyone who can do this for me locally so the paint looks like a good option. The G2 system has great reviews from lot’s of people so I’m confident it will work.( Just as a note, this isn’t the caliper paint you can buy in places like Canadian Tire – their’s is a much less durable, lower ceramic content paint that get’s pretty awful reviews.) I had to order the G2 specially, using good old E-Bay.
The C5 calipers had already been painted but not with G2, so the first job is to get this off. I tried various wire brushes and so on but they weren’t very effective. So my next approach is going to be chemical; acrylic thinners to break down the paint and strip it from the metal.
This is the new C5 front caliper:
Pretty dirty right now, Hopefully stripping will take care of that.
This is the C4 rear, also looking pretty rough:
My plan right now is to swap the rear caliper, these are some used ones I picked up. The aluminium is fairly deteriorated though so I may just use the existing ones on the car instead. I’ll decide once I’ve cleaned them up some more.
Here’s the C5 Abutment bracket also in the rough, these are going to be painted in black:
And finally, the conversion brackets that make it all possible. I’m going to hit these with the black also:
It’s definitely winter here in the Great White North, as attested to by the -20+ temperatures and the fact that my dog doesn’t want to spend much time out on the deck! One of the benefits of the long winter though is that at least it gives you time to do some update projects without having to sacrifice seat time.
At the moment projects are somewhat problematic. My garage isn’t built yet; I had hoped to get it done last year, but that was taken up almost entirely by wedding plans and preparation, leaving virtually no time for anything else (including driving the vette!). So, at the moment, the car is tucked away in a friend’s heated garage (thanks Ted!).
This is a great improvement on the first winter of having the car (I still have nightmares about putting the car in storage the way I had to then), but it also provides limited access and space for working on any projects. Reviewing the work I would like to do on The Dragon, it’s clear that most of it requires long hours of access not available without my own garage. Continue reading
We’ve had the ZR-1 on the road a couple of weeks now and a ‘change oil’ light has appeared. With the ZR-1 this is largely a moot reminder. Most owners change oil every 5000 miles or so anyway, so the factory reminder is meaningless. That said, I’m a little paranoid when it comes to the car, so I decide I will make the change anyway and start my cycle immediately.
All I need is some oil (Mobil 1 High Mileage for the zinc, though the car isn’t high mileage), an oil filter, and the necessary trays etc for draining. The oil turned out to be no problem at all, in fact Canadian Tire had an offer on, so I took advantage and stocked up (it’s rather expensive stuff!). Then came the procurement of a suitable oil filter. Continue reading
Although the C4 Corvette was a world beater at the time it was released, sadly the inevitable march of time changes things. Twenty plus years is a long time in the auto industry.
That’s not to say that C4s should be dismissed – as some newer ‘vette owners and associations (and indeed many manufacturers) would like to. A good C4 can probably still kick the ass of 95% of the cars out on the streets.
Nevertheless, time brings improvements, so what, if anything can be done if you’re an ardent fan of the C4 but still want to play with the newer ‘vettes? Continue reading
There’s been a lot of talk on the ZR-1 forum and others about the removal of Zinc from motor oil, specifically Mobil 1 and the potential detrimental effects on the LT-5 and other Corvette/high performance engines. Opinions have varied and I’m certainly no expert so I decided to do the obvious – I asked Mobil through their support line. The response was -
“The new ILSAC GF-4 motor oils (10W30 and lower viscosities) do have reduced (0.08%) ZDDP in the formulation for longer longevity of the catalyst converter and system. This is not a problem on newer vehicle designs that utilize the roller cam, valve train technology however, if you have flat tappet cam, valve train technology you generally want higher ZDDP levels. Mobil1 15W50′s, Mobil1 diesel motor oils, Mobil1 motorcycle motor oils and Mobil1 High Mileage 10W30 and 10W40 have high ZDDP levels and would be the best choices for these engines.”
I also found some good online resources discussing this issue and additives in general -
http://www.hotrod.com/techarticles/e…ech/index.html
http://www.performancemotoroil.com/truth_about_oil_additives.html
Hopefully this will help people make an informed decision.









