| MIATA BUILD |
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 | February 8, 2011 - We have a new sponsor!
Wiseco is going to provide pistons and rods for the Targa Miata engine. The engine is an all-aluminum 5.3 known as an "L33" or a 5.3 Vortec HO that's being rebuilt by the wizards at V8R Spec to a healthier specification.
The Wiseco bits will make it stronger, better able to handle the punishment of a motor that will live on the racetrack and rally stage.
The Targa Miata actually ran Wiseco pistons in the four-cylinder engine as well.
We don't have pictures of the parts yet, we'll put one up once we have them.
entry 792 - tags: sponsor |
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 | February 14, 2011 - The V8 Roadsters front subframe is here - and it's a beautiful thing.
We also received the differential mount. More V8 Roadsters parts are coming, but the subframe will allow us to double-check our transmission tunnel modifications and move forward with the work.
entry 793 - tags: subframe, V8 conversion |
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 | February 18, 2011 - A gift from Eric: a real Martini Racing MOMO steering wheel.
It's from a Lancia Integrale and was shipped to him from Italy. He's going to send it my way.
Totally unnecessary, but very cool.
entry 794 - tags: Martini |
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 | February 25, 2011 - The frame rails have arrived.
That cross bar will support the T5 transmission. As an added bonus, these rails will help protect the bottom of the car and provide an excellent jacking location.
entry 795 - tags: stiffness, conversion |
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 | March 2, 2011 - The transmission has arrived.
It's a T5 with the following ratios:
2.95
1.94
1.34
1.0
.63
There's always some concern about the strength of a T5 in this sort of application. However, it's the same one used in the V8R Spec series. The big advantage we have is weight - there's a world of difference between launching a 3000+ lb Mustang and our 2300 lb Miata. We will be adding a cluster support to help it out.
entry 796 - tags: transmission, V8 |
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 | March 28, 2011 - Cue the happy dance!
The freshly built engine has arrived from V8R Spec. I really want to unwrap it and get fingerprints all over, but I know it'll just look like every other V8 and it's well protected at the moment. I can't wait to fire this puppy up.
entry 797 - tags: engine, v8 |
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 | March 28, 2011 - Time to get back to work on the car.
Tyler has been busy working on another V8 conversion, but now it's the Targa's turn. He used the plastic engine on the subframe to confirm we have the clearance we need for the bellhousing, and now everything can be welded up.
entry 798 - tags: v8 |
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 | March 28, 2011 - The transmission tunnel modifications are complete.
The tunnel is actually big enough to swallow the large T56 transmission, even though we're going to install a T5.
entry 799 - tags: v8 |
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 | March 28, 2011 - The original harnesses for the Targa car had expired and had to be replaced.
Corbeau will either re-web them with new straps or, for another $9, send you a new set with new hardware. The new ones are marked with an April 2011 date, that's as fresh as harnesses get! Corbeau is based right near us, it must have been the fast shipping.
entry 800 - tags: safety |
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 | March 31, 2011 - Before painting, the car got a coat of sealer in the transmission tunnel as well as primer along the seam welds.
I was conflicted about using the sealer on the tunnel - it'll make it harder to fit heat insulation such as the Reflectix I used earlier, but it'll protect the metal. I'll just put insulation inside the car this time.
entry 801 - tags: v8, tunnel |
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 | March 31, 2011 - That's a much nicer engine bay!
Not a concours job, but it'll do the job. I'm now out of the original bucket of white paint, so I'll get a quart mixed up to keep on hand for future touch-ups.
entry 802 - tags: paint, conversion |
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 | March 31, 2011 - The radiator was specifically designed for V8 conversions.
It's got the correct size inlet and outlet for the big motor and is a very efficient dual-pass crossflow design. The radiator mounts have to be altered to move the rad forward as much as possible. This involves cutting and welding the stock bits and lots of test-fitting. To avoid damage to the radiator, I wrapped a layer of cardboard around the core.
entry 803 - tags: cooling, v8 |
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 | April 19, 2011 - Everything's here.
It's time to start the build. And just in time - the car's supposed to be in Atlanta for the Mitty vintage races. It has to be on the trailer in a week. Can it be done?
Maybe. Between the long period of disassembly, the fact that it's a built engine from a different source than FM's usual crate motor and the different transmission, I've found a lot of little items that have been overlooked. Some are simple to fix, such as the missing motor mount bolts. Some are a bit more complex, such as the remote oil filter mount that was forgotten. Still, if all goes according to plan the engine will be in the car tomorrow.
entry 804 - tags: conversion, V8 |
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 | April 19, 2011 - Even though the engine block has been hot-dipped, I ran a tap down the mounting holes in the block.
It made a big difference to how easily the bolts went in. A tap and die kit should be part of every mechanic's tool set.
entry 805 - tags: conversion |
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 | April 19, 2011 - In order to fit the engine in the Miata's small engine bay, you have to use just the right accessory drive.
GM is thoughtful enough to make several options available as kits, including clear instructions on how to mount it along with well sorted and labeled fasteners. It's a pleasure to work with parts like this.
Of course, there was one little problem. The engine has a non-standard damper with a smaller diameter crank pulley. So the included serpentine belt is too long. This is the sort of thing I ran in to all day, and that's what will keep the car from running at the Mitty.
entry 806 - tags: conversion, accessories |
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 | April 19, 2011 - The bellhousing to attach the T5 transmission to the LS engine is a beautiful piece.
That's a special release bearing being test-fit in there at the moment.
entry 807 - tags: conversion, transmission, bellhousing |
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 | April 21, 2011 - That's one cool looking clutch.
It's not an ideal street setup, but it should hold really really well.
entry 808 - tags: conversion |
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 | April 21, 2011 - The release bearing needs to be set up with the correct clearance.
To do this, I installed the bellhousing without the bearing and measured the distance from the mounting surface to the fingers on the pressure plate. Then I pulled the bellhousing off again, installed the release bearing in the housing and made the same measurement. Using some teflon spacers, I set up the bearing with 0.100" clearance to the fingers. Voila! Time to move on.
entry 809 - tags: conversion, clutch, release bearing |
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 | April 21, 2011 - Ta-daaah!
The drivetrain is ready to install! This is the first T5 V8 car built at Flyin' Miata, and the new transmission caused a number of small problems that had to be resolved. Nothing major, just things like mismatched bolt lengths and different hydraulic plumbing, but it meant I spent most of the day dealing with them.
entry 810 - tags: conversion |
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 | April 21, 2011 - As with the original engine, I'm going to run both an oil pressure gauge and a warning light.
A 1990-94 Miata provided the sender for the former and a 1995-05 Miata provided the switch for the latter. Packing them both into the tight space at the back of the intake manifold was a bit of a challenge, but with the right collection of pieces they tuck in nicely!
entry 811 - tags: conversion, gauges |
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THE DIARY