just curious if anyone could give me some insight on the mazsport-greddy turbo upgrade. as far as i know no one has done it. if you resized the turbo would it give you the best of both worlds. or would it just behave like the mazsport kit. not that behaving like the mazsport kit is a bad thing.....just wondering.

another option i read about was the turbo relocation kit for the greddy and installing a GT2871r.

the whole reason im asking this is because i like the greddys price and down low numbers. however i will pay more for the mazsport if it makes sense.

the truth is i want a power increase in lower rpms for everyday driving "greddy". but i also need power for when the light turns green and i want to walk on someone "mazsport". thats why i was asking about the two options above, so maybe i could find a happy medium.

i realize some of you will say "you wont know till you buy it" or "you cant build the perfect turbo kit from just opinions"....this is just food for thought to help me in my descision.

thanks

rick

 

Boost is boost is boost. Your engine doesn't know what the brand name of the kit is. What really matters is how much whp/boost you are gunning for. That'll dictate which turbo kit is designed around your flow rate. Then you can pick a kit and match it with what you deem is the sufficient amount of accessories to get the most of it. The Greddy kit is less than half the price of the Mazsport, but it needs more work to really be a quality set up. At 250-300 whp, it's probably the best bang for your buck kit. For 330+ whp, you're probably starting to require more upgrades that eat into your pocket. I would go and read threads about people's successful Greddy setups, where they ended up, and what the out of pocket was.

 

im not concerned about the brand name at all im just relating performance type to a certain kit. its not really the price im concerned with either.... what im saying is the greddy makes better power at lower rpms than the mazsport. if you upgrade the turbo; in theory it will improve the performance in the higher rpm range as well as keep the good low end numbers that the greddy all ready has

but what could you do to the mazsport to improve the low end rpms?? put in a smaller turbo??

i guess what im really trying to say is ....

i like the low end that the greddy has, what can i do to the kit to keep the low end and increase the HP at higher rpms? i would buy the mazsport if it had better low end performance....i would get the greddy if i was certain i could improve the top end.

what should i do

 

ask mysql, he has greddy and hes so happy with it.

 

a bigger turbo is going to take longer to spool up. How much longer is the question...

MM says the GT2871R can be bolted up with minor changes in the greddy turbo spot, that turbo should be able to give you 40-50 whp additional (so now we're talking 330 - 350 at the wheels), but until we see some dyno sheets...

also keep in mind that the mazsport kit can make those numbers using less pressure,

 

http://www.turbobygarrett.com/turbob...R_771847_1.htm

 

It is the smaller size of the turbo that gives you that low end. The Greddy is operating at it's sweet spot in that 4-5k rpm range where a larger turbo is just getting started. I don't know anything about the quality of the turbo they use, if it is ball bearing or bushing. Using a larger turbo will trade low end for high end.

Get a variable geometry turbo!!

 

Almost positive the GReddy is bushing, not ball bearing. That written, the GT28 bb may reach operating range just as fast, if not faster than the GReddy unit.

 

it's a bushing, not ball bearing turbo. Size is size as well. If their modification consists of boring out the Greddy turbo and putting in a bigger impeller you will sacrifice some of the responsiveness on the low end for more power up top. Unless you alreay have the Greddy kit, and are looking to upgrade, I would highly recommend you just go to the Mazsport kit. By the time you upgrade the Greddy kit to the capability of the Mazsport kit you will pretty much be right there already.

 

another thing i just realized is that the greddy is putting out better numbers at lower rpms...but is doing it at 10 psi. if the mazsport was pushing 10 psi i wonder what numbers it would turn?


rick

 

The Mazsport at 10 psi will output a denser charge and maintain it to higher RPMs. It will produce more hp. The Greddy will achieve 10 psi earlier. As the RPMs rise, it will produce a hotter and hotter (less dense) PSI till it is no longer able to supply the needed CFMs. If the Greddy is a bushing turbo, you might be able to find a larger turbo that will spool at the same RPM using ball bearings thus gaining most or all of the Greddy's low end while adding additional top end. The GT2871R might be one such turbo with ballbearings.

 

Judging by this statement...rickyo saw the recent flame fests and thus did a search and structured his question appropriately...

good job ricky...

if you already have the greddy kit...be sure to apply all the fixes before moving to a different snail. The last thing you want to do is bump it up and have something fail on you taking everything with it. As far as size of snail or type...listen to the others and seek ye mazda maniac's stuff. I had also posted waaay back a thread which asked the question about the ideal sized snail for the renny. MM and others posted some pretty good stuff in there...I would recommend you go and check it out.

There is alot to learn and its not going to be easy...but if you try to understand and read up you'll be much better for it down the road.

 

i definitley have tried to do all the searching i could. i dont have a turbo yet.....still trying to make a decision on the FI product that will fit my driving style. I think im going to go mazsport. i like the overall package of the kit, the more dummy proof the better. also the top end has less of a limit than the greddy even with the GT2871r. i like the greddy because of the price and the low end power. i wish the mazsport had more dynos at a higher psi so i could see if the low end improves.

but when its all said and done i am purchasing a turbo because of the ******** sitting next to me at redlights. and i think the mazsport will give me the most usable power in that situation.

what do you guys think?

rick

 

if you have the money, you aren't going to go wrong with any of the mazsport kits.