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Old 01-24-2012, 09:09 AM   #1
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Default Engine build advice for combined daily & occasional track warrior

Hey guys,

I recently sold my dedicated track pig as I wasn't really getting much use from it. I am now focusing on building a fun boosted daily that can handle the occasional track day (probably around 6-10 days per year in reality).

The car is a 1998 NB. The main goals here are good economy and reliability. To keep things fairly reliable I am making use of a lot of factory Mazda bits.

Here is what I already have for the new build:
  • 1994 NA 1800 block with the oil feed port
  • 2002 NB sump + MBSP
  • 1998 NB crank + complete head
  • 2004 MSM/SE turbo manifold, exhaust, lines, water pump inlet, AEM intake + turbo fitted with a 15T compressor wheel
  • TODA chromoly flywheel
  • 2002 6 speed gearbox
  • 40mm alloy radiator with good ducting

Other stuff I intend to go with:
  • Wiseco 9:1 pistons
  • Eagle rods
  • VVT oil pump
  • Coolant reroute
  • Welded -10 drain fitting on sump
  • Everything balanced

I intend to run the turbo at approx 1 bar of boost, maybe up to 250hp at the wheels.

Do you think this is a good recipe for a rock solid daily including driving it quite firmly at the track? Anyone got any long term stories regarding forged pistons in a daily?

Apart from properly sorted engine management, injectors and clutch, can you think of anything I may want to consider?

Cheers
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Old 01-24-2012, 08:28 PM   #2
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sorry, can't help

How are you mate?

I'm in the same process at the moment.

Good thread here...well I thought so

https://www.miataturbo.net/engine-performance-56/motor-budget-looking-longevity-power-suggestions-60417/

So you sold the pig huh?

Did you land up sorting out what you were gonna do for management? We never did skype ya know.
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Old 01-26-2012, 10:00 PM   #3
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Hey Derek,

In the process of selling the pig, got no tow rig now anyway so it is a no brainer.

As for management I am probably going with a HKS F-Con iS as Danny is getting good results on his cars and they both drive/start/idle like factory management. I love full standalones on track cars but on a daily it's too much hassle.

I am going with CP pistons as I couldn't get the Wiseco pistons in 9:1 CR.

Make sure you share your experiences and I'll do the same.

Cheers
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Old 01-26-2012, 11:06 PM   #4
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ARP head and main studs?? not required but wouldnt hurt while you have it open. radiator, engine mounts, turbo, tubular mani, 3" dp and exhaust
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Old 01-28-2012, 10:20 AM   #5
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I have a fairly conservative goal and the costs were starting to blow out so I've decided instead to use a low mileage bottom end from an NA then just give it a new oil and water pump and call it a day.

I'll put my NB head on it with some ARP head studs, and fit the MBSP and sump.

Cheers
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