'94 Block into a '99? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 01-15-2008, 10:27 AM   #1
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Default '94 Block into a '99?

I asked this over a m.net while this site was having some issues yesterday...

I am looking for a bottom end to build for my '99. I found a block out of an automatic '94 locally. All I'd be keeping is the crank and the block itself. Will this work?

The only think I can think of being different other than the oil feed on the exhaust side is the knock sensor mount. Is this present on the '94?

Thanks
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Old 01-15-2008, 10:55 AM   #2
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the 94's didnt have knock sensors, i would have to check to see if it has the mounts though
you should not have any problems fitting it though, i know a few people that have used 94-95 blocks and 99+ heads
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Old 01-15-2008, 11:29 AM   #3
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Quote:
Originally Posted by pschmidt View Post
I asked this over a m.net while this site was having some issues yesterday...

I am looking for a bottom end to build for my '99. I found a block out of an automatic '94 locally. All I'd be keeping is the crank and the block itself. Will this work?

The only think I can think of being different other than the oil feed on the exhaust side is the knock sensor mount. Is this present on the '94?

Thanks
Yes, it will work and yes, there should be a place to mount the knock sensor (there are multiple good locations for this anyway.)

Mark
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Old 01-15-2008, 11:36 AM   #4
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the only difference should be the lower compression and stronger rods.
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Old 01-15-2008, 11:59 AM   #5
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he is not reusing the pistons or rods though
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Old 01-15-2008, 12:05 PM   #6
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Thanks guys. I'm going to go snag this and start to build up a bottom end.
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Old 01-15-2008, 12:09 PM   #7
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good luck, i have plans for a build later this year
are you going to keep track of all the parts you had to get, like bearings, gaskets, seals, bolts, etc.
im trying to get everything ahead of time and im sure i will forget something
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Old 01-15-2008, 12:12 PM   #8
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Yeah, I'll inventory everything. Rods I know where to get; how about pistons? I'm looking for something in the first overbore, 9:1 compression ratio flavor.
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Old 01-15-2008, 12:19 PM   #9
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weisco. try http://www.importperformanceparts.net/ iirc $439 for 8.8:1 or

http://www.raceeng.com/p-6760-wis-mi...urborings.aspx

they'll most liekly have them in stock.
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Old 01-15-2008, 01:20 PM   #10
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tip: do not jb-weld your knock sensor on.
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Old 01-15-2008, 01:23 PM   #11
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The 94 block has a spot exactly where the 99 does for the knock sensor. I have done it myself a couple times.

Its an easy transition to that block..

Have fun with it.
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Old 01-15-2008, 01:51 PM   #12
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Thanks for the info on the block and the tip on the knock sensor. I'm trying to avoid all things ghetto on this car, but you never know when they'll make an appearance. I'd at least use the stick welder.

So Wisecos, rods from 949 (this is all if the Chinese stroker crank deal doesn't work out). How about valve train? Raceengineering has some stuff, is there anything better?

Thanks
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Old 01-15-2008, 03:14 PM   #13
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supertech makes both pistons and the whole valvetrain.
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Old 01-15-2008, 03:19 PM   #14
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i wouldn't worry about the valvetrain unless you are thinking of reving higher or throwing in cams.
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