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View Full Version : upgrade turbo for Mazdaspeed MX5?

Flores
11-15-2007, 01:29 PM
Have you guys heard/seen of a bolt on upgrade for this car? it has a funky IHI on it... it's only a 1.8 so it probably wont take much of an upgrade before you end up redoing everything anyway (which may be why I havn't heard of anything that is easy to bolt up) but I figured I would ask.
Turbochargers
11-15-2007, 01:37 PM
I do not know of a bolt on upgrade. Nice thing about IHI turbos is that they are easy to upgrade. If you can have the car down for a week or so, take the turbo off and bring it in I am sure we can do a stage 1 upgrade on the compressor side.
numbnuts22715
11-16-2007, 10:19 PM
I thought that the gt28rs would fit?

Or would you need a different manifold?
Turbochargers
11-19-2007, 12:23 PM
I thought that the gt28rs would fit?

Or would you need a different manifold?


I am not sure, what flange is on the inlet stock?
VashThaStampede
11-19-2007, 12:31 PM
I've seen some for the MS mx3 and mx6

but not the 5..prolly same stuff, different manifold and piping.. in theory I'd assume you could use one of those and make it work.

I'm pretty sure gt28rs would need a diff manifold, i just don't see it fitting in there with the stock one
Turbochargers
11-19-2007, 03:31 PM
Take a pic of the turbo where it bolts to the manifold. If you do not mind.
Flores
11-20-2007, 11:50 AM
This is the only thing I could find...

http://paulsdesk.vidnet.net/~pflores/se1ie3.jpg
Turbochargers
11-20-2007, 12:29 PM
that looks like a mitsu turbo. If that is the case I have a ton of upgrades you could just do a evo III bug 16G.
nester
11-20-2007, 01:28 PM
It's not a mitsu turbo. It's a IHI RHF5 ball bearing turbo.

We can do quite a bit to this car. Replacing the stock BPV with something like a FORGE unit, doing a better downpipe, or upgrading the stock FMIC.

I've been wanting to do some products for this car, but time has been a factor. Lots of power to pickup with just a better designed intake, a BPV, and exhaust. After that, it's injector time, and you'd need a piggy back or standalone to compensate.
nester
11-20-2007, 01:51 PM
My bad, after a slight more research, that turbo may not be ball bearing. The original press release was ball bearing, the pre-production cars were ball bearing, but the sales press makes no mention of it, and they appear to be journal.

Basically, bring us the turbo, we can do the measurements on it, and see what wheel it'll take.