Hi there from another Dutch guy!
I live near Utrecht, so not so far away. I used to go to school in Gouda (but that is more than 10 years ago!)
If you want help (I also speak Dutch) feel free to send me a PM.
Originally Posted by BlueBoyMiata
I'm planning to build a 300+ hp engine for street use.
If it is for street I would say try not to focus too much on the 300 bhp number, driveability and torque/response are also important factors on the street (or at least for me they are)
i have a mk2.5 '03 engine with 85k m i want to use for the build.
Is it is a 1.6 or a 1.8? If it is a 1.6 I would start with swapping to a 1.8, that makes it much easier to get your power numbers and it also helps driveability.
-mk 2.5 engine with/without vvt
-Stand alone ecu
-Forged Pistons low compression
-Full 3" exhaust
-Bosch EV injectors 610 cc or more
-Gaspump fuel, standard octane is 95 or 98
Looks like a solid plan, do you already have an idea of specific parts?
If not I would give you some pointers:
Turbo: GT2560R seems like a good choice, but if you go for one with the internal gate you will have to port the internal gate and on ordinary RON98 fuel you will probably not see 300 bhp
The EFR6258 is a better choice for your numbers, also the technology of the EFR will improve response and driveability over the GT2560R. There are EFRs around here in Europe and I am pretty sure there will be some European distribitor in case you do not want to deal with customs.
Stand alone ECU: I would go for the Motorsport Electronics ME221 or a MS-3 based ECU (reverant/MSlabs being the easiest solution). This way you can maintain VVT
Injectors: go for EV14's and with your power number get something bigger than 600cc/min. If you want E85 in the future stick with something that is close to 1000cc/min.
Fuel: It is not impossible to get E85 in The Netherlands. My car will also be powered by E85.
Turbo manifold and down-pipe: You can source these in Europe / UK. To name a few manufacturers: Black cat fabrication, Revent shop (former Sturovo), G19 Engineering
Originally Posted by Joe Perez
Has it ever been positively confirmed that in the European market, all '94 and later cars came with what we, in North America, would consider to be the "1.8 style" diff, regardless of which engine the car was equipped with?
I am pretty sure that all >1994 cars in Europe have the "1.8 style" diffs.
There are quite a few differences between USDM and EUDM cars which are often mistaken by 'internet experts' who think USDM and EUDM cars are identical.
To name a few:
-NB 1.6 have solid lifters and no CAS
-All EUDM 6 speed cars I came across have a 3.6:1 rear end
-EUDM NB's (Mk2) still have a return line for fuel, NB-FL (often called Mk2.5 in Europe/UK) have returnless fuel
-EUDM NBFL always have a flat-top intake manifold (although this is quite common knowledge here!)
Originally Posted by 18psi
is this mk2.5 head a bp4w aka 99-00 head?
also you'd need e85 to hit 300 on a 2560
its simply not happening on pump gas
Some people around here have a habit of calling the 99-00 NB the Mk2 and the 01-05 NB-FL the Mk2.5
The cylinder heads are the same as in the US: BP-4W for the 99-00 NB Mk2 and BP-ZE w/VVT for the 01-05 NBFL Mk2.5
Originally Posted by BlueBoyMiata
it's the bp-ze head. I'm going to see a mechanic that build miata trackcars it's called the max5 cup in Europe. But probley go for the bp4w head because of the vvt.
Go with the VVT head, it will work fine with a MS-3 or ME-221 ECU and it will give better torque and better spool compared to the BP-4W head.