Well my original turbo started to smoke more often than I would like for the past few days so I ordered a Precision 6265 (.81AR) Billet turbo from maszdaparts.com.

The new turbo directly replace the old unit and the swap was pretty easy. The quality of the new turbo is very very nice. The one I got is a journal bearing one. The billet compressor wheel spins much much better than the old unit. I already have 300 easy miles on the turbo to break it in. Last nite I decided to do some easy pull using 5th gear. Holy crap this turbo spools at least 300-400 rpm quicker than the old one. In 6th gear I get boost just before 4000 rpm! And that rolling on the gas pedal! How hard does it pulls? Rolling on the gas pedal, from my butt dyno, this turbo at 5 psi pulls harder than the old one at 9 psi (my wastegate fully open at 9- 10 psi). It seems like once it spools it gets the boost up much quicker than the old unit. It also sounds a bit different than the old one. It sounds more refined. It seems like the old MAP for the old turbo is OK for this new turbo as I see AFR around 11.2-11.5 when in boost (running methanal). Note that I only get into boost at around 6000 rpm max. However, I plan on having Chris double check the MAP before I drive it at full boost. I can't really say much about how different the car drive right now since I only get into partial boost 2-3 times last nite. I plan on driving it easy until I get to about 400 miles. Over all I am very please with the new turbo. Now only time will tell if it will last as long as the old no name unit (9000 or so miles).

 

How does this turbo compare to having the original unit upraded by BNR to the 60-1?? I also assume that this is the turbo that esmeril is now shipping with the kit new?

 

Those are completely different kits... the BNR upgrade is for the Greddy kit while this new turbo is what is offered as standard in the Esmeril turbo kit.

 

BNR also offers an upgrade for the esmeril turbo. It uses a to4e or s housing with a 60-1 wheel.

 

My mistake, carry on

 

BNR one is the rebuild of the stock turbo that come with the Esmereil kit. The old journal bearings are replaced with ball bearings which is also water cool. There are some other stuffs that get upgrade too but I don't remember. It is about $960 or so for the cost. The tubo that I got is the optional turbo when you order the Esmeril kit. This unit is much better than the one that come with the kit. It is much more efficient and spool much quicker.

 

What did the precision turbo run you?

 

sounds like a decent upgrade , keep us posted ...

 

$940

 

You've got meth so give it at least a good 14 or 15psi, which should get you close to 400whp as long as you've got the fuel for it. That turbo is barely breathing right now and you aren't making the kind of torque you could have. Make sure you've got conservative timing (I'd initially run with 6 or 8 degrees leading and 15 split at 15psi). Be easy on the drivetrain.

Also, you don't need to break in a new, properly built turbo. Just prime it with oil before you start up the car. Make sure your tune is good. You should be embarassing C6's and new 5.0 Mustangs with this turbo. There's really no comparison between this and a 60-1.

 

Arghx7, I am running off my wastegate spring at about 9-10 psi. I do not have boost controller. I plan not to push the car like others do. I just want to have some fun that about it. More fine tuning still needed to get the most of out it so I will wait for Chris to do that. I can tell this turbo has lots of top end and it has a wider power band than the old one. It spools quite a bit quicker also.

 

I'd recommend getting a boost controller. It's the best FI upgrade you can make. Especially if you are talking about faster spooling.

 

My issue is i am looking to upgrade over the winter to E85 and a differnt turbo. I was looking at BNR's upgrade but this has me thinking maybe i should go this route. I am will ing to try 15lbs on this turbo running E85.

I was debating Meth injection instead of E85 but i am worried that the meth system would one day fail going into boost and then it woudl be the end of the motor. So, hopefully, i will be E85 and differnt turbo in the coming few months.

 

definately. breaking into boost around 4,000rpms is not anything to be excited about. for turbos that can flow enough for the 350whp range you should be expecting to make boost 2500-3000

 

Wait for Chris then. at 10psi you aren't making any torque as I said before. I'd be more worried about the drivetrain than anything else. Get you a Profec S boost controller. They're really easy to use.

with enough boost this is a 450+ rwhp turbo on a rotary and 600+ on a 4 cylinder piston motor. whole different ballgame. 15psi by 5000rpm is fine. it's not as bad as it sounds when you drive it. Renesis is gutless under 4000-5000rpm from the factory anyway

 

If E85 is semi convenient just go with that as long as you have the fuel system for it. a 6265 is going to easily outflow most of the turbos people are using on Rx-8's right now, including the 3071 and 60-1

 

Depends on what your goals are I think . If you want a firebreathing drag racer then it's fine .


Exactly why a turbo that spools at 2500-3000 is such a great thing . Totally makes up for all the shortcomings of an NA engine .

If you fit a large turbo and don't use its capacity to make huge horsepower then you just made a big mistake IMO .

 

E85 is so convenient its not even funny around here (iowa). Damn near every station has it and there are several plants located near by that actually make the stuff.

Would a 6265 at 15lbs on E85 be a timebomb waiting to blow, or would it be somewhat reliable and last quite awhile. I knwo its always a guessing game, but to me it seams thats the most i would want to push the renesis and feel "safe".

 

Well...boost controller is on my plan but not right now. The turbo is quite responsive the way it is. What brand/model of boost controller do you recommend? There are so many out there. I need to do more researh.

 

If there are lots of E-85 station around where you live then that is fine. There aren't that many E-85 else where I think. At least not where I live in MN. Gas mileage is going to drop quite a bit running E-85. With Meth if you tuned the car conservatively. Newer systems are pretty reliable these days as long as you keep the bottle full. I was thinking about this route and realize that when I go on trips I would be stuck if the area I go do not have E-85 stations.

 

Agreed about it not being availible in most areas. I would feel pretty safe headin anywhere in IA. However, there would also be two tunes on the car. one for hte E85 and one i can switch to if i need to run 91 (with practically no boost). I really dont take the 8 on any trips anyway. Its more of a fun toy to play with and a nice car to take out when going out with people. I agree with the meth kits being a better option if there is no E85 around. I considered it quite hard and was going to go the meth route based on how much cheaper it was to go then E85.

Get your car tuned again by chris and once its tuned, hit a dyno. Its pretty cheap if you jsut get on and do three pulls for power levels. around here its about $75 for three pulls. Very curious of your numbers.

As far as boost controllers i am runnin the Greddy Profec B spec 2 boost controller. have not it totally setup, waiting on a tune. And i am thinking the tune will come after the turbo upgrade and E85 conversion since its gettin so close to winter already.

 

Phish, I think many of the meth inj system these days have some sort of fail safe system when the motor not working or warning when bottle is empty. And you only need it when in boost anyway. I think in the long run it make more economical sense.

I will have Chris tune my car again when he has time. Right now I need to get to 400 break in miles for the turbo. 50 miles to go!

 

Still not sold on the Meth debate. When i can buy 100 octane pump gas (E85) for $1.99 a gal. and 91 octane for $2.89 a gal. I am seeing E85 being a more reliable source then buying cases of "boost juice" to add on top of hte $2.89 a gal. fuel.

However, i can see both aspects of E85 and Meth. i think its ones own opinion such as the supercharger/turbo debate.

 

E85 all the way if it's really as available as you have been saying. Switch to some high flowing Injector Dynamics injectors. they make 1000cc and 2200cc injectors.

To the OP, have you considered a Sound Performance Quick Spool Valve for this Precision turbo? I think I'll make another thread about it.

 

Already planning on going the injector dynamics route wiht four 1000cc injectors. Also jsut going to move my p2 injectors to the p1 position. Or i suppose i could move the 1000cc injectors that came wiht the esmeril kit to the P1 position but i think they woudl be way to large for that position.

I am also tyring to decide between the KGParts fuel rails and the OBX fuel rails that are on ebay. Yes, i know its ebay and i never buy anything car related off that site, but they are $100 cheaper and seem to be a pretty sold set. Its hard to find anyone using them to see what there opinion is.