Mazda 3/6 Top

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Mazda 3/6 Top

Postby Tladi-ST » Thu Apr 07, 2016 3:21 pm

Wsup Guys,

Would a Cylinderhead from a Mazda 2.3L fit on the ST150 block?

If so, what would be the benefits?
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Re: Mazda 3/6 Top

Postby MrMazda » Thu Apr 07, 2016 5:20 pm

Check the dipstick path I think Ford changed it on the Duratec engines. AFAIK the NA Mazda LF & L3 (2.0L & 2.3L) heads are the same so you will probably not gain anything.
The only other difference is that the Mazda's valves ets were sourced in Japan & Ford in Europe.
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Re: Mazda 3/6 Top

Postby Tladi-ST » Fri Apr 08, 2016 9:05 am

Ok, what would the best route to take for a 2.3L conversion without changing the entire engine or would that not be worth it?

My plan was/is ST190 kit with cosworth cams on a 2.3L head, pulley and exhaust... but I'm not sure if this will work and what power gains the would be.
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Re: Mazda 3/6 Top

Postby Skywalker » Fri Apr 08, 2016 9:54 am

The conversions I've read about involve a 2.3L block and sub-assembly with a 2.0L head, not the other way around.

The best thing to do is remove your ST 150 head and have it compare to a 2.3L head by a professional.

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Re: Mazda 3/6 Top

Postby Jippo » Fri Apr 08, 2016 10:43 am

Tladi-ST wrote:Ok, what would the best route to take for a 2.3L conversion without changing the entire engine or would that not be worth it?

My plan was/is ST190 kit with cosworth cams on a 2.3L head, pulley and exhaust... but I'm not sure if this will work and what power gains the would be.

Your cylinder capacity will be determined by your bottom end, not the head.
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Re: Mazda 3/6 Top

Postby MrMazda » Fri Apr 08, 2016 10:55 am

Capacity of a piston engine is determined by the cylinder bore x piston stroke x no of cylinders.
Current: 2010 Mazda 6 Active, 2002 Bantam B3 1300, 2010 Sirion 1.3.
Ex:Mazda 323s X 5 1026 000km & 626s X 3 515 000km & B2200 D/c 4X4 345 000km & Meteor GLi 1.6i 120 000km, BMW 528i X2 44 000 km
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Re: Mazda 3/6 Top

Postby flouwford » Mon Apr 18, 2016 11:06 pm

Heads are the same. Interchangeable.
The 2.3 has a slightly bigger port, but in the wrong areas.
The 2.3 also uses a thicker cam chain, so the sprockets arents the same.

Other than that. All the same.

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Re: Mazda 3/6 Top

Postby Stu » Tue Apr 19, 2016 8:09 am

in my opinion its a waste of money - the 2.3L is lazy and doesn't rev as high or as smoothly as the 2L - it does make slightly more torque but in a straight up race robot to robot I would back the 2L
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