Mazda MX-5 Miata banner
Cancel

1999 Head

419 Views 13 Replies 5 Participants Last post by  Gixer, 
AdamL
Few questions on this.
Is 99 the only year that they produced the head that flows best out of all of them? I don't suppose it falls into anyother years?
What would you have to pay to get one?
If this was fitted to a std 1.8 bottom end with a MS DIYPNP that enables removal of the maf what bhp could be expected?

Thanks in advance.
Reply
Save
Like
1 - 14 of 14 Posts
AdamL
anyone?
Reply
Save
Like
azura
AdamL said:
anyone?
Click to expand...
iwas also the intake thing which made a differnce.
Reply
Save
Like
Gixer
As the man says the intake path is straighter on the later heads.


The VICS system in the intake manifold also helps gain some low/mid range.

These heads were fitted to 99-00 1.8's.
You'll need the head, intake manifold and fuel rail.

Price no idea.
I've seen em go for ?100 and i've seen em go for ?300.

Power gain i'd expect 10-15bhp from both mods with a decent tune.
See less See more
Reply
Save
Like
AdamL
Thanks Gixer, just what I wanted to know.
Reply
Save
Like
Vindi (Russell)
And me!! I have a 1999 1.8 engine in my Mk1, currently running a 1991 1.6 intake manifold, throttle body and ECU... I take it swapping these items for the correct 1999 items would see a bit of a power gain? I will be adding a charger and EMB later, but want to get the basics right first!!

Russell.
Reply
Save
Like
azura
vindi49 said:
And me!! I have a 1999 1.8 engine in my Mk1, currently running a 1991 1.6 intake manifold, throttle body and ECU... I take it swapping these items for the correct 1999 items would see a bit of a power gain? I will be adding a charger and EMB later, but want to get the basics right first!!

Russell.
Click to expand...
im surprised the 1.6 intake fits on it? but yes i would be better. you will need a controller to run the intake as it has something that changes in it(VICS).
Reply
Save
Like
Mr Slow
vindi49 said:
And me!! I have a 1999 1.8 engine in my Mk1, currently running a 1991 1.6 intake manifold, throttle body and ECU... I take it swapping these items for the correct 1999 items would see a bit of a power gain? I will be adding a charger and EMB later, but want to get the basics right first!!

Russell.
Click to expand...
The intake manfiold will be the 1999 one. 1.6 engines are shorter, and MK1 intake manifolds don't fit.

You might gain a smidgen from the correct TB, you'd definately gain from using the 1999 ECU and dumping the AFM!
Reply
Save
Like
Vindi (Russell)
OK cheers, so I guess my VICS is not doing anything at the moment?

Any ideas how much of a job it is to get / fit a Mk2 ECU onto the Mk1 wiring loom I have? If its a lot of work, I may just put it on hold and go for an aftermarket ECU (when I can afford it) before I go for the charger conversion.

Russell.
Reply
Save
Like
Mr Slow
You'll likely have to swop 99% of the loom too, the NA ECU uses a CAS to ascertain cam and crank position, the NB has seperate crank and cam sensors, (are those even still fitted to your engine!?!)

It'll definately be easier to fit an aftermarket ECU.

You can get VICS going with an rpm switch, but don't expect to notice a difference
See less See more
Reply
Save
Like
Gixer
You'll get a better result with just swapping for a 99-00 motor.

Th later motors had a higher compression ratio, this together with the better designed head and slightly hotter cams does give a noticable hike in power.

Don't flog your 1.8 <94 motor though as you'll need the sensors, CAS and cam cover.

VICS does make a noticeable difference when your N/A Richy, it's subtle but you can feel that extra omphhhh in the mid range.

Cheers
Mark
Reply
Save
Like
Mr Slow
Vindi already has a 99 motor, ya skim reader
See less See more
Reply
Save
Like
AdamL
Think he was talking to me.
Reply
Save
Like
Gixer
2
Mr Slow said:
Think he was talking to me.
Click to expand...


See less See more
Reply
Save
Like
1 - 14 of 14 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Mazda MX-5 Miata
A forum community dedicated to Mazda MX-5 Miata owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
MX-5 / Roadster Forum General Chat & Banter Members Rides Forced Induction & N/A Power Mods General Car Chat
Top