PDA

View Full Version : Anyone experiences with the Greddy TD04H Miata turbo kit ?


razor_nl
06-11-2004, 04:37 AM
Hi all,
i was wondering if anyone has done this..
today, my tuning specialist told me that it IS possible, he had allready seen it.
This turbo kit is a bolt-on kit for the MX5 Miata 1.6
and with some little modifications (the manifold is too small, and replacing some other things) it has to fit perfectly on a BA 1.8 and would kick in at about 3200rpm.
and than adding a large intercooler (space enough at the front), blow-off valve etc... should be very nice i guess :D

but has anyone here allready done this?
or does anybody know something more (f.e. bad things) about this combination ?

Thnx all :D

Dogo
06-11-2004, 09:36 AM
I dont know much about the kit but if it doesnt include some internal engine mods , I can see your engine blowing up on anything but small boost ie <5psi. since the kit is for 1.6 I'm guessing it wouldnt have the stronger engine internals for a 1.8 engine.

BigMal
06-11-2004, 09:55 AM
If you are having a new manifold made then it can be done the
negative is the $$$ spent for the grunt. Buying a Greddy turbo
will cost say $2500 alone and with that same money you could buy
a GTX motor and microtec ecu which is good for 120kw atw as
done my Sik Mik. Same setup and add a VF10 for $300 and you
can get 150kw atw as proven by Robbie. Obviously there is more
to it than that my point is that for the price of 1 item you mentioned
you could almost have your conversion and a better result for your
money.

razor_nl
21-11-2004, 06:58 AM
Hmm yeah well, there are some big problems about the swap.
First of all, i've allready got new camshafts in my engine, so if i do an engine swap, that would be a waste of the money i spent in the cams.
But besides that, GTX engines aren't available here in the netherlands. No engines+gearbox seperately, no half cuts, only cars that still run, but they cost a lot of money. And importing an engine+gearbox really costs a lot of money.
And.. i can't do it myself, so a tuning company has to do it for me. Including the conversion of the gearbox to FWD. I calculated everything, and a greddy kit, with seperate intercooler (real large one, finally i'm happy about NOT having airco ;) ), dumpvalve, etc. etc. is MUCH cheaper for me than an entire engine swap. Adding a turbo on my car is much less work than an swap and conversion. And the prices of the garages are much higher than in your country.
So thats why.. an engine swap is just no option for me.

There were only some things that came up on me..
How much power can the standard gearbox handle? And is there a way to upgrade it? (except for exedy clutch and pressure plate)
And second, how about the ECU? Can it handle the turbo by itsself ?(maybe after a reset)
If it does, are there interesting upgrades for the ecu? Piggyback or a free programable ecu or something..
And if it can't handle a turbo correct, what do i need to do to make it run?

hope you guys can help me with this because, as i said before, an engine swap just isn't an option for me.

razor_nl
11-12-2004, 10:57 AM
Oke...
lets see

if i order this kit:
www.overboost.com/obs/product.asp?pid=31001

togheter with this manifold:
www.overboost.com/obs/product.asp?pid=29311

and i get myself an intercooler+piping and stuff, a blow-off valve...

is it gonna work ?

Cosmo Dude
11-12-2004, 12:29 PM
That manifold is designed to put the turbo out to the side of the motor. In an Mx-5 there is plenty of room for it, I believe that in an Astina that the radiator would be in the way. You would be best to find a GTX manifold and have the flange changed to suit your turbo.

razor_nl
14-12-2004, 08:49 PM
Oke, thanx for the information
Any idea where in the world the best place is to look for a GTX manifold ?

sabretooth
27-03-2005, 01:41 PM
How would you get around the GReddy manifold pointing upwards instead of downwards? Mounting in its native direction will have the turbo up fairly high in your motor wouldn't it? Also not working in favour of the GReddy kit is the 1.6 - it's designed for a 1.6. The port spacing between the BP and B6 is different (wider on the BP). So the manifold won't even line up anyway.

The TD04 on the GReddy has a T2 flange, so you'll need a manifold that has one of those.

You may as well just get a T2-flanged turbo, T2-flanged manifold, and get an exhaust shop to custom make you a dump pipe.


btw, I have a GReddy on my MX-5, but a much smaller version of that kit. Soon, all that's left of the GReddy kit is going to be the TD04 when I replace the manifold with another.

chicaboo
27-03-2005, 05:38 PM
Before you worry about turboing, what have you done with these NEW cams? I've read several times that cams that have been optimised for NA power are farked for turbo because of the extra valve overlap which causes bad detonation, this means you need to retard the timing and sacrifice power anyway... If you know your cam specs, post them up and one of the cam efficieonados can tell you if you've wasted your money already or not. From what I understand on a turbo you want lift in very little overlap, but I don't think superchargers are as fussy, so your NA cams may still work with a S/C...?

Gav.

BigMal
28-03-2005, 05:34 PM
Your wrong about the blower if anything it would be worse as they come
on lower in the rev range when the effect is greater. The stock NA cams
dont have overlap if you have got yourself cams that do then you will have
the problem which ever way you go. Overlap under boost means air forced
in the intake goes out the exhaust which is open at the same time as piston
is around TDC. In NA its not a major issue as the piston moving down creates
the suction which is affected by exhaust scavenging but nowhere near as
much as under boost where the air has 2 choices in the piston chamber or
out the exhaust as it rushes in.

Overall boosting a NA can be done we all know that the cost depends on
what parts you can get hold of. As I said before for us IHI turbo's are a
lot cheaper an option than greddy stuff but you can only use what you can
get hold of cant you.