As far as i know, no one makes high compression pistons for the fs-ze, eg a 11.0-1 compression piston.
Weisco make pistons to spec. Orion has a set of 11:1 compression pistons
But my questions that come with this are, How are valve clearances when it comes decreasing the head gasket thickness
Fine. I haven't done the numbers on all head gaskets but I was thinking of using a .030 myself.
if you decrease the size of the head gasket, your going to throw the timings out, so sure you increase the compression but your retarding the engine, so the gain you get from one is put down by the other.
My understanding was that for every thousandth it was about 1 degree. So essentially two thousandth decrease means that you'd be looking at about 2 degrees per cam. Using an off the shelf head gasket made by cometic is about 110 USD.
So is it then possible to get adjustable cam gears or something along the lines of that to fix this?
Unfortunately all off the shelf items move the cam sensor pickup meaning you will need to have some made. If your going NA just get someone to regrind your current cams to suit your new build problem solved as well as delivering a performance boost. win win.
Cause to me it seems that going the N/A is going to be so much for expensive, because you carnt just buy a thinner head gasket you have to get one made, and that will surely be a fair bit.
Be careful of assuming things. This forum has a wealth of information if you go digging back to 03-08. People like Lord Worm, Xerlderx, Twilight, Gen1GT and of course Installsheild2. Theres a few work logs that will prolly interest you such as jimmsuites, CullRidR.
ALSO, to try and get the answer, what is the standard thickness of the head gasket on the FS-ZE??
0.04. I think the mazdaspeed head gaskets thinner though
(emphasis on think)
Also my gear box is G25MX-R.
Yah appears i forgot the X
The G25M-R was used for the BP-ZEs
According to protege FAQ, how reliable is this source?
The guy who produces that page TheMAN has access to a hell of alot more information then most and has some pretty rare manuals so pretty reliable
There was someone else besides install shield in the 190s that used titanium rods I'll see if I can find the thread but it was forever ago in the protege section. I'm pretty sure he was using a stroker crank too but can't remember
His Honda has stock rods, aftermarket pistons, stock spec head gasket. He has d16a6. Of course d-series are way stronger than the fs but I don't see why he couldn't do it with a good tune maybe rods. I'm pretty sure no one has done a high compression turbo build.
I've looked through many build threads and I do know what I'm talking about. If 170 whp is good enough for you go na if you want more than that turbo is the only way
I don't know of anyone else but if you find a worklog let me know
The stock crank is a beast tbh. Its true the OP could use aftermarket rods and create a high compression turbo. Only problem is its expensive as the MPS ecu wont work with high compression, the fs-ze ecu certainly wont which means he needs a full ecu or a piggy back (Take your pick but a SSAFC wont do IMO).
I apologise for my earlier comments, its just on these forums for pretty much everyone its turbo or the highway there is no other option but turbo. I agree that turbo for US people makes more sense you guys have low compression engines relative to the rest of the world. For the rest of us its faaaaaar more expensive as we need to source all our parts (or pretty much everything) from the states or have it custom made, sourcing from states means shipping and paying in US dollars which isnt great due to exchange rate, custom made parts are expensive quality costs and labour is really expensive
. (We also need to pretty much rebuild the engine going turbo, just isn't practical on 9.7:1 compression stock) For the OP a set of rods delivered to his house will be about ~650 dollars NZD. Sourcing a manifold from Aus is the only thing the OP would need to source from outside NZ really for a nice little build. The rest, cams, intake, midpipe, exhaust can all be sourced from local shops making it far more practical and easier.
@OP:
In the end man, which road you take is up to you. What you want out of it and how much money you want to spend. Id start with the basics IHE. Some suspensions mods cause going turbo will cost you a pretty penny. Most of the guys in the states who have gone NA have had to buy pistons and quite a few have used the 10.4:1 pistons in there build you have the advantage of already having them
You wont make as much power NA as you will Turbo thats a given, you are restrained to atmospheric pressure essentially. If you want to get fancy then you can develop a IM that will develop 4-7psi but thats a matter of money and time.