| MIATA BUILD |
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 | |  | January 13, 2011 - Plans for the car are coming together.
There's been a change in the engine specification. There's a proposed Spec V8 series in the making, called V8R Spec. V8Roadsters and V8R Spec has offered to not only provide the hardware for the V8 conversion, but also a built-up L33 engine. In exchange, we'll send off the old LS1 from Elvis that has a few of the parts needed, such as the improved LS6 heads and intake. The support from V8 Roadsters and V8R Spec is fantastic. That's Elvis' old engine in the picture, looking rather forlorn after being booted out for a 480 hp LS3. In case you don't know Elvis, that's Flyin' Miata's first V8 car, the blue car I've been playing with at various autocrosses and at Laguna Seca over the past couple of years. It'll be the sister car on the 2011 Targa team, running in Touring.
So what is this L33? It's a runt in the LS engine family. The big boys run as big as 7.0 litres, but the L33 is only 5.3. It's also known as the Vortec 5300 and is found in trucks. Specifically, the 2005–2007 Chevrolet Silverado 1500 4WD and GMC Sierra 1500 4WD extended cab trucks. What makes it interesting? Well, it's the only one of the truck engines with an aluminum block, making it lighter than most. It's actually a fairly popular one to use for various swaps, as they're generally less sought-after than the bigger variants but still able to make good power.
It will be modified, however. The LS6 intake and heads make a big difference, as does the V8R Spec camshaft. Basically, the engine will be set up for a nice power increase but without sacrificing behavior. Expected power levels are 410 hp and 350 ft-lbs. Steve at V8Roadsters thinks it's the best of the various LS engines. So we'll have approximately double the power and torque of our 2008 car with a weight penalty of around 200 lbs. Seems like a good trade.
entry 772 - tags: engine, ls1, l33 | | |  | January 13, 2011 - There is a sad side to the big plans.
That sweet little 2.0 is going to have to come out. It's been a rock-solid engine, giving very little trouble despite what we've asked of it. Ever since Janel discovered how much fun the Targa Miata is to drive, the car's had to do double duty at trackdays. It just goes and goes and goes. I'm going to be truly sorry to see the engine go, but it's for sale to support the transformation. The header is also going to be available along with the rest of the exhaust.
It's a bit like selling a child, but I'm hoping it'll go to a good home where it can roam free and play on fun roads or tracks. Contact me if you're interested in any of the driveline, engine computer or exhaust.
entry 773 - tags: for sale, engine, header | | | January 13, 2011 - We've made some big promises.
The goal this year is to compete for the top prize. We'll have the car for it, and if we can stay out of trouble I think we'll do well. However, our goals are still basically the same as 2008, in the same order:
- stay out of the Atlantic
- finish the race
- get a Targa plate
- go as quick as we can
We're not just out for the experience this year, but to show off the performance and reliability of FM's little super Miatas. We can't do that if we break or crash, so that's off the menu then. I'm not going to discount the competition - we're up against some very, very quick drivers with much more experience at the event. Could we prevail against Steve Millen and his GTR if he came back, or unseat Matt Oldford who won last year? Not without quite a bit of difficulty and no small helping of luck.
The weak point is going to be the crew - again. We've got some Targa experience now, but we're also going to be piloting a much faster car. Am I bit nervous about this? Of course, I'd be foolish if I wasn't. We'll prepare ourselves as best we can and I'll build the best car I can, but it's going to be a challenge.
entry 774 - tags: goals | | |  | January 20, 2011 - The first of the V8 conversion parts is here.
This is the mounting system for the rear differential. Two tabs need to be welded to the rear subframe to locate the nose of the diff and that grey cross-bar bolts into the factory mounting spots. The big aluminum disc is an adapter that goes on the pinion flange of the differential.
entry 775 - tags: parts, differential | | |  | January 24, 2011 - Here's our differential.
It looks used because it is - it's the one originally used in Elvis. That car has a new rear end in it and this one landed in a box awaiting the Targa Miata. It's a Getrag rear originally used in the Cadillac CTS-V and has a 3.42 ratio and a Positraction clutch-type limited slip. It's a very effective package.
entry 776 - tags: differential | | |  | January 25, 2011 - The work begins.
It'll be a while before we have the drivetrain, but first the existing high-compression setup has to come out. It's a bit of a sad moment, that's a really nice setup and the car is very well balanced. But it will be reborn stronger and faster! The current engine and the header have been sold and will live on.
While the car was originally built on jackstands in my home garage, it will be rebuilt on a lift in the Flyin' Miata shop by the pros. This will be a nice change of pace.
entry 777 - tags: disassembly | | |  | January 25, 2011 - While the car is being pulled apart, the extra pieces will be safely stashed away.
Starting with the coolest looking hood and trunklid ever seen in the FM shop.
entry 778 | | |  | January 25, 2011 - Goodbye, faithful 2.0.
This engine has been rock solid, the perfect companion to a rally/track Miata.
entry 779 - tags: engine | | |  | January 25, 2011 - That didn't take long.
A couple of hours after Adam started working on the car, the drivetrain was out. Since then, the engine's been split off and the suspension pieces have been stacked to one side. It took a lot longer to build it than it did to take it apart!
entry 780 - tags: disassembly | | |  | January 27, 2011 - Time to mount the Getrag differential in the rear subframe.
There's a cross bar that mounts the back of the diff, but we need to weld two tabs on for the front. The stock rubber bushing has been removed and replaced with a polyurethane part for better control of the diff. It's held in place with a set screw.
entry 781 - tags: differential | | |  | January 27, 2011 - The car's looking pretty empty by now.
It's almost time to start modifying the shell.
entry 782 - tags: body | | |  | January 27, 2011 - The Targa car started off as a 1994 R package, which had a long career with an FM II turbo installed.
At 200,000 miles, it was taken off the road, stripped and seam-welded. You can still see some of the clearancing for the turbocharger on the frame rail by the driver's shock tower. It's time for some much more intense engine bay modifications though.
entry 783 - tags: body | | |  | January 28, 2011 - The car continues to come apart.
We need to open up the transmission tunnel a bit to clear the large bellhousing required by the V8 engine. Because this car is so stripped out, I figured it would be possible to do the work without pulling much of the interior. But, because the car is so stripped out, it didn't take long until it's stripped even further. And now it'll be easier to work on.
The dashboard support was welded in with a couple of supports to the firewall and the tunnel. Those had to be cut. But they can be mended easily.
entry 784 - tags: disassembly | | |  | January 28, 2011 - Because the V8 is a thirsty beast, the complete fuel system is going to be replaced.
All the fuel lines will be -6 AN (3/8") stainless braided lines, running a returnless system at approximately 60 psi. For the higher fuel volumes and pressures, the pump is being replaced with a higher-flow unit as well.
We're installing the fuel pump/fuel level assembly from an NB Miata because it's got nice push-on connectors. This isn't totally necessary, but it does eliminate a few adapters and makes for a cleaner install.
entry 785 - tags: fuel | | |  | January 28, 2011 - The first step in modifying the engine bay is to strip off all the paint and seam sealer.
This is not a fun job at all.
entry 786 - tags: engine bay | | |  | January 31, 2011 - With the interior of the car completely stripped, Adam continues the prep work for the tunnel modifications.
First, the factory braces on the sides of the tunnel are cut off. Then the seam sealer is removed. The braces will be welded back into place once the modifications are done.
entry 787 - tags: body | | |  | February 1, 2011 - The surgery has begun.
The corners of the firewall are cut out, and these reinforcing plates will get welded in.
entry 788 - tags: body | | |  | February 4, 2011 - The tunnel has been widened.
It's not an obvious change, but the seam along the outside edge was been opened up. We need to check clearances using the plastic engine, a bellhousing and a subframe - but we don't have the subframe yet. So this will remain half-finished for a bit.
entry 789 - tags: tunnel | | |  | February 4, 2011 - The chassis was seam-welded before the transformation into the Targa Miata began.
But nothing had been done in the engine bay. While waiting for a subframe to show up, he finished the job using the diagrams out of How To Build a High Performance Miata. He also did some work in the wheel wells.
This makes a big difference in the car. I've been driving around in a Miata that's seam-welded and fitted with a set of FM frame rails, and it's a remarkably rigid chassis. It'll really help the front end deal with the torque from the big engine.
entry 790 - tags: seam welding | | | February 8, 2011 - We're seeing a very good response from the Miata community.
The support can only be called amazing - we've collected nearly $8500 worth of pledges for us to return to Newfoundland. In order to send the planned two-car team, we need to raise at least $10,000 by March 10th. What's special about that date? That's the six-month point, after which the financial penalties for withdrawal go way up.
But at this point, we know for sure that the Targa Miata is returning along with Janel and I. And that's excellent news. A big thanks to everyone who's helping us go back. I think some of the other folks at Flyin' Miata are a little shocked at how much is involved from a planning viewpoint to make this happen.
entry 791 - tags: fundraising | | |
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