Will a '99 head fit on a '94 block? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-18-2007, 11:18 AM   #1
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Default Will a '99 head fit on a '94 block?

will a 99 head fint on a 94 bottem? and if so what kind of gains would i get. and who has done it befor if so?
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Old 10-18-2007, 11:24 AM   #2
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yes some some did
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Old 10-18-2007, 11:33 AM   #3
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no i dont think you can fint a head two a bottem
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Old 10-18-2007, 11:43 AM   #4
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it fints
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Old 10-18-2007, 11:44 AM   #5
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roflmao...hahaha
99 head has better flow than earlier models, but there is some work involved, but its been done many times, as someone said, "go forth and search" im sure its been covered more than enough times
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Old 10-18-2007, 11:47 AM   #6
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mmmm flow.
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Old 10-18-2007, 11:58 AM   #7
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smooooooooooooooooooth
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Old 10-18-2007, 12:23 PM   #8
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You're a power-bottom.
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Old 10-18-2007, 12:26 PM   #9
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you will also need the 99 intake manifold as the runners do not line up and/or they come in at very different angles. that also gives you the VICs variable runner length option which is said to give you a few hp/ft-lbs
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Old 10-18-2007, 12:57 PM   #10
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Quote:
Originally Posted by paul View Post
you will also need the 99 intake manifold as the runners do not line up and/or they come in at very different angles. that also gives you the VICs variable runner length option which is said to give you a few hp/ft-lbs
this post is. too many words
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Old 10-18-2007, 01:00 PM   #11
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Quote:
Originally Posted by TurboTim View Post
this post is. too many words
He never was a man of few words:gay:
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Old 10-18-2007, 01:19 PM   #12
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Originally Posted by olderguy View Post
He never was a man of few words:gay:
but he is right, he will need the Mantake Interfold instead of the regular intake manifold used on previous years
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Old 10-18-2007, 04:39 PM   #13
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mmmm flow.
nice
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Old 10-18-2007, 04:44 PM   #14
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So besides the head and the intake manifold do you need to change the ecu or any wiring?
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Old 10-18-2007, 06:52 PM   #15
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Quote:
Originally Posted by turbowannab View Post
So besides the head and the intake manifold do you need to change the ecu or any wiring?

you'll need to use your current 94 wiring.
you'll have to use the coolant temp sensor at the back of the head off the 94 as the plugs are different for the 99.
you'll need your 94 CAS
you'll need your 94 throttlebody
you'll need to modify your 94 EGR tube if you use one to fit the 99 intake, i think the EGR valve kinda interferes with it
your 94 throttle cable will be a lil long, i inserted mine in the second slot that the cruise cable would typically would go in
you'll need either a 90-93 or 94-97 FPR, i forget which one fits better. 99+ don't have one.


timing gears, timing belt, valve cover, valve cover gasket are all the same. 94 exhaust manifold bolts right up
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Old 10-18-2007, 07:17 PM   #16
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Quote:
Originally Posted by paul View Post
you'll need to use your current 94 wiring.
you'll have to use the coolant temp sensor at the back of the head off the 94 as the plugs are different for the 99.
you'll need your 94 CAS
you'll need your 94 throttlebody
you'll need to modify your 94 EGR tube if you use one to fit the 99 intake, i think the EGR valve kinda interferes with it
your 94 throttle cable will be a lil long, i inserted mine in the second slot that the cruise cable would typically would go in
you'll need either a 90-93 or 94-97 FPR, i forget which one fits better. 99+ don't have one.


timing gears, timing belt, valve cover, valve cover gasket are all the same. 94 exhaust manifold bolts right up
thanks that helps alot my current head is ticking so i thaght i might as well replace it with a 99 head
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Old 10-18-2007, 07:23 PM   #17
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Quote:
Originally Posted by turbowannab View Post
thanks that helps alot my current head is ticking so i thaght i might as well replace it with a 99 head
The ticking is just your hydraulic lifters, pretty common for them to tick. An oil change can sometimes fix it if it has been a while since your last one.
The '99 is better though so why not.
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Old 10-18-2007, 07:28 PM   #18
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yeah it dos go away actualy it hasnt ticked for a while but i would just like to not think about it at all =) pluse i want to build my miata any sugestions on were to get a turbo kit?
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Old 10-18-2007, 07:33 PM   #19
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build your own...
if you can't then determine how much you want to spend and ask that question again...your budget will determine what kit is best for you...also, decide on what power level you want to reach
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Old 10-18-2007, 07:39 PM   #20
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200-230hp for about $2500-$3000
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