Mazsport GReddy cold-side upgrade.
 

Well, as promised, I got my rebuilt turbo back from Scott in just a few weeks; most of that spent in shipping. (I was promised an in-house 7-10 day turn around and the turbo was only gone for three weeks and a couple days. Doesn't get better than that. Shipping each way took a week. It would have been faster but FedEx couldnt find the delivery address and missed a few days. FedEx called me three times complaining that they could not find the address. Bizarre. ) During all this, I got email and phone updates from Sara. This is par-for-the-course with my dealings with Mazsport. Never have I had an issue. Normally, i would not mention such things as dealings at this level are, IMhumbleO, best kept between those that are having the issue, not spread thin on facts across a public forum. Furthermore, if I did post such issues, I would expect readers to become informed from my post; I would not expect them to be recruited inappropriately to some "cause." That is called, quite frankly, a witchhunt.

I am astonished at what I got back. First, the turbo looks brand new. Not sure how they got it looking like that. What went out was somewhat rusty and what came back looks like it has never seen the underside of the car. But I digress.

I should have taken pics of the wheels before I sent it out, but what came back seems disproportionally larger. That may be my mind playing with me. Interestingly, the cold-side has double vanes. One good thing is that the bearings were shot (i think) when I ripped out the turbo and the wheels spin solid now. Hopefully these journal bearings will hold up for a year or so, at least for some time to pass for the next upgrade.

I am curious, why I need to run non-synth oil for the first oil change. This is not an issue, but it is curious. I was informed of this via a sticker on my wrapped turbo. I would be genuinely interested in the reason for this.

Job now is to get the snail back up and mounted, get my fuel issues dealt with, check the base tune for safety and then get the car out for paint. Then I mount up my new Bride Gias when they (well "it" for now; i will buy the pass side later) arrive hopefully in December-January.

If the weather turns warmer, I will get tuning and maybe post up some dyno numbers this year. While I dont keep track of costs, I believe I might be in the running to for the cheapest route to 300hp on the RX8. The GReddy kit was used and I think I got it for under $2k. IIRC like $1500 (maybe it was more. I could be way off, sorry.) That kit put me at 250whp. This upgrade was only a grand and should get me to 300hp. How's that! (I suppose you should count the int-x, injectors, fuel pump in that calculation but would rather not.)

What? Is Scott soliciting customers to post in his behalf to restore his good name? All I have to do is look at that awful lower intake manifold and 'nuff said. (My God, what a hack job).

Ahh. A pitchfork carrying member of the mob. How nice of you to stop by.


Look, I dont know you and you sure the fuck dont know me. So dont come posting implying that MY motives are less than honorable. How the fuck do you come off impuning MY name? HOW FUCKING DARE YOU?

Unless you have some shit on me I suggest you STFU and back off.

u need to relax

Well it is true that b'Eight' made the exact kind of remark carbonRX8 wasn't wanting - some witchunting anti-mazsport mob-type post.

If you got a good product from Mazsport - it's great you let people know so it's not just a one sided flame war against a company, especially if they are actually doing "something" right "some" of the time. I will say more people post negatives because they have problems, than the majority who don't post who don't have problems. I know I wouldn't make a post for every item I buy that worked as claimed, but for the ones that don't work as claimed I would probably be pissed and want to share my experience with others to help save them from possibly going through what I went through.

That said, I don't think carbonRX8 should get attacked for saying his Mazsport transation went through great; it's childish, grow up. If you want to post anti-Mazsport, go to the Good Guys/Bad Guys thread and post your experience.

um, thats like saying "i got ripped up by using nothing more than the Pilates DVD's off TV that i got for the cheap.......(oh yeah, but im not counting the roids i was shooting also)" :uhh: :squint:

we, in fairness you did kinda bring it up and open pandora's box with your comments here.....
...........................

agreed agreed and agreed... anyone who has positive dealings with MazSport should be equally as free to post about it here.
its always possible that the preponderance of evidence we have here on the forum is misleading in some way:uhh:

really.... awe fuck it whats the point:lol:

jesus, relax.

interested to see what power you can make - I have the same upgraded turbo ...

everybody, why don't we just take it as a peaceful thread.
he did the greddy upgrade, and he likes the way mazsport did it, so it's good for him. at least mazsport does good job on the turbo. if other ppl have bad experiences with mazsport, just post with a new thread. i am aware what is going on with the vendor and other ppl, but we can't always burn people when ever they talk about the product that they are happy with, and it comes from the vendor. so, since he talks ab out the turbo greddy upgrade, why don't we focus on the thread topic instead of trying to make it as an arguments.
i am not looking any argument....
i hope you can dyno it and show us the HP
steven

Forgot to mention, good luck getting to 300whp & don't forget to post the dyno! :)

the flow maps comparing the upgraded wheel to the original greddy one showed a minor change in the amount of air flow.

Given that the greddy kit stock technically CAN make 300 whp if you really push it (I've only seen two people do it out of all the people with greddy), I'm going to assume the same psi on old and new will net you maybe 10 whp gain. So while 300 is still within reach, it isn't likely. You aren't going to make 300 whp on 9 psi with this.

The upgraded cold side makes the GReddy turbo, effectively, a 20g.
Its good for about 8 pounds more air.

Doesn't do anything for turbine flow.

^ So what does that mean in terms of comparing it to the original greddy? It has issues generating heat instead of boost at 12 PSI onwards.

Well, the TD06-18g hybrid that GReddy ships will move about 32 pounds of air.
Whatever manifold pressure that translates to is dependent on a bunch of other stuff, as we all know.
The TD06-20g that it becomes after being upgraded moves the flow map up a notch to 40 pounds of air or so maximum.
The main problem with the Mitsu turbo is its oil cooled and gets both over-spun and over heated in our application. That doesn't really change by making the compressor wheel bigger, though it does slow it down a bit.

http://www.mazdamaniac.com/images/mi...g_18g_3071.jpg

if you need a wrench hander, let me know. im really excellent at putting sockets on socket wrenches and handing them to people under a car.

:lol:

im serious though. if you want some help (even if its just handing wrenches) i'll be there. would love to see this go in.

This is the mass flow i'm getting from the upgraded turbo .
300g/s = 39.6 lbs/min which is spot on to what MM predicted .

http://i154.photobucket.com/albums/s...8/MAFchart.jpg

What Type Of Pressure Is That Translating Too...trying To See Where It Falls On The Compressor Map

it's 5.1 psi at 8250rpm - just did a run to verify

dumb question time - how do you get a psi figure from the chart ?

i got my turbo kit for $1500. ;)

You take the psi you run your car at, add 14.7, then divide by 14.7. So for your car Brettus, you're running a pressure ratio of 1.35 at that rpm.

So PR=(Boost pressure + 14.7)/14.7

hmmmmmm - that would put me off the chart - wonder what is going on there ?

Just did some reading around some old Greddy Dyno threads .
This has convinced me that the upgrade turbo wont do anything unless the stock wastegate is modified (spring strengthened ,welded shut, external wastegate fitted ) to allow more boost in the higher rpm range .......

So with the upgrade you will see the same hp numbers as the stock Greddy unless you do something with the wastegate .

that's a lot of effort for a turbo that dies every year.

mine was rebuilt twice, the first rebuild done by mazsport.

I agree - but i'll do what i can with the spring and be content with that till it needs a rebuild ....

im curious how you would accomplish this, i want to upgrade my internal wastegate while my turbo is out but im afraid of doing major mods to make it work