with the same PSI, its gonna be about the same between the 2 turbos. different sizes in turbo is going to affect how quickly it spools and the MAX hp you can achieve from the turbo itself.

 

So why RRM non ic kit has 200 whp??? It runs on 5 PSI right?

 

This is so not true!!

tuning and rpm make a difference but volume of air and fuel are the building blocks.

Bigger turbo's flow more air at the same pressure.... thus you can put in more fuel and thus you can get more power.

T-28 has proven 10-15% increase in power per psi of boost than the T-25. It is also more effecient and capable of a higher power range due to this.

 

RRM non-ic'd cars pulling 200whp are running 7psi.(5speeds)
at 5 psi they are pulling about 185whp on average.

If you ran this setup with a t-25 you would see about 170whp at 5psi and about 190whp at 7psi. You would get about a 200rpm's quicker spool as well with the t-25. You give to get in this case... give up spool... more power... quicker spool... less power. You just need to decide which you'd be happier with.

Personally if you settled for the t-25 you wouldn't be disappointed that much unless you either raced an RRM customer or tried to build the car past 250whp. Even with the AEM EMS you'd find the T-25 just isn't for the power guys.

Also the BIG T-28 RRM uses is not the T-28 advertised by turbokits.com. The BIG T-28 actually has a bigger compressor and exhaust wheels. It can support around 350-400hp. This is why their kit is being pushed farther than any other.

If i were you i'd see if you could get the kit without the turbo and source your own BIG T-28 if you were going for bigger power... hell a nice 20G would be great also. If you just want some speed without the worry of building it to be a monster... stick with the T-25 and you'll be fine.

 

that would be the best turbo kit for your car.

 

Ahh Boe, theh T-28 outdoes itself once again! just kidding, you may want to edit that becuase some people are easily confused any who, i just turned my car up to 7 and this mug is cooking.


Boe I'm going to PM you in the next few days about my setup and what I should / can be running.

 

superior kit comes set at 6 psi, i have it

 

How do you like it? Any pros/cons?

 

i havent had time to install it yet...its just laying around in my garage

 

hotshot... i did the edit... thanks for the headsup on that.

TSI kit seems like a great starting point kit that basically comes with what you need... i feel this kit is for the more knowledgeable though as it is not a bolt on and go setup. You do need to modify somethings as others have found. It is basically up to the mechanical skill of the buyer i believe. That coupled with the desire for future developement/hp. This kit offers a base just like the RRM kit does... the only thing is that one is well proven and has been improved/upgraded quite far. The other is relatively new and doesn't have the support for the same upgrade paths.

If your knowledgeable in forced induction or just want something different then here you go... just remember there is a higher risk with this than the other kit out there. Be careful and if all else fails just have a professional tune it. That is better than blowing the motor.

 

Hey boe.. How easy do you think it would be to convert the RRM turbo set up to a setup where a turbo manifold would be used? instead of the header/uppipe/turbo/downpipe combination? i know fixing the downpipe to fit to the car's exhaust would be a *i*c* but.. i think it would look cleaner.. Let me know yer input.. thanks.. by the way i was thinking of using this manifold and just modifying it a little.

- Jose

 

That is something you'd just have to dive into... i've always like the turbo being right there for the world to see. When i opened my hood people were impressed with it right away. RRM was trully thinking outside the box when they did this and they were also considerate to the fact that some states don't have laws against turbo'ing your car but all states say you can't modify emmisions equipment. Thus a manifold would make it illegal. That is why RRM made their setup like this. Also if they can get back on their feet and finish the smog stuff it would only be a legal kit by keeping it the way it was designed.

Going to a cast manifold may be good on the looks, that is opinionated, but i don't see it giving any real gains performance wise... now a tubular manifold would. Maybe you should just see about having a custom manifold made as well as the turbo outlet to downpipe. For what i've heard Turbokits.com is expensive on the manifold... like 400 bucks. For that much most shops would make you the tubular manifold with wastegate flange as well as the exhuast side with dump tube accepter. That would be what i would do rather than this manifold.

I do agree that the tubular manifolds are clean and manly... also they have performance gains. The cast manifold from turbokits.com would force you to do some kind of internal wastegate system also. This would make that Tial from the RRM kit worthless and that's not good. It's expensive and better than any internal wastegate.

Just my .02 and this is super OT so sorry i'll shut up and get back on topic.

 

I got 60k miles on my 2002 OZ, would putting turbo on it be safe (9psi MAXXX).
And if I would get forged pistons make it safe?
And for how long I would be able to drive on a stock engine?

 

/\
This question is the only thing that still concerns me about getting a turbo or not.

 

even at 60k if the kit is tuned properly i can't see why you would get another 50k mile on the car. It is actually quite strong and can take alot when tuned properly. Just make sure you get a properly tuned setup or if you go custom you get it tuned at a good shop.