im not a big fan of the 50 trim... i think you would have much better results with a Gt based turbocharger, and that is definately coming from experience!!

 

Really? Not to sound like an *** but why? I figure a BB 50 trim would make the same power but spool sooner?

 

I was set for the 3076R but someone told me the BB 50 trim will be better for me. I will run only on pump gas and want to keep the 264's in my car for better spool. Maybe later I will add Methanol, but not sure yet.

What is exactly the BB 50 trim? it's not a GT turbocharger?

 

i would also consider the BREvoIx-20g, seems like the best bang for the buck. i agree with the people that say stick with a stock based turbo or get a 35r, although before the 20g i disagreed. the 20g can produce 1/4 times like the gt30r turbos, if not better, but costs alot less. on the 330whp tune that buschur had, it ran a best time of 11.3, which is amazing considering this tune can be done on pump gas. when they tuned it on race gas and got 376whp, i think they can dip into the 10s, which the gt30r cars usually cant unless they use nitrous.

i was very close to purchasing a 3076r kit, but the numbers most people get from it seems like its not worth the money. i am still open to see if there is a reason to get the 3076r over the ix-20g, but so far i cannot come up with one. good luck with whatever turbo you choose.

 

Yo!

I see you didn't decide either on your turbo . To be honest If I was living in the USA, I will get the BR 9-20G. I think those turbo are great but only if you get proper tuning ( and maybe pretty aggressive one ).

I live in Tahiti and looking for "easy" Hp with safe tune on pump gas. So the BR 9-20 ain't a good choice for me. But to be honest I want to experience a bigger turbo than 9-20G... but wich one? that's the question

 

the biggest reason to use a GT turbo over the 50 trim, is that you get a tremendously advanced compressor wheel and turbine wheel technology as well as a MUCH stronger/durable center section for only slightly more money. The BB 50 trim is more than likely a thrust washer based bearing turbo, and is not a true stainless steel dual ball bearing center section.

whoever is telling you to use a BB 50 trim has obviously not compared it to a GT turbo of similar size!!!!

 

Geoff, if I wanted a turbo that had similar spoolup to the 3071R (60mm wheel, .63AR), with the ability to hold more power on the top-end (93 Octane application), what would you recommend?

I'm leery of stepping up to a 3076, because the spoolup of my 3071, while acceptable, is already a little bit laggier than I thought it would be. So now that Garrett has downsized the 3071, it seems that there is a gap, so-to-speak in their turbo lineup.

l8r)

 

i would recommend trying out a .82 a/r housing... you may find that the lag does not increase at all, yet top end increases significantly, particularly if using a properly designed long runner merge collector manifold and a properly designed downpipe

 

AMS made 490whp on a plain bearing 50trim. this was on a PTE .48 exhaust housing. This was on a dsm setup that ran an adapter plate bolted to a stock exhaust manifold. Full spool was at 3500rpm, 490tq.

The 3076 may make 600whp maxed out. but for a 500whp setup I prefer to use the 50 trim. I have used both and the 3076 is laggier. full boost at 4000. The single bb turbo that turbonetics makes is also more robust design than the dainty garrett daul bb. It has all the same spool advantages. The bb is only needed on the compressor side. This is where the thrust surface is. the thrust surface is like a disc brake, that is where the friction is. The bb eliminates the thrust plate.

I stand by my recommendation from someone who has experience with both turbos.

 

I also dont feel 'tremendously advanced" is a good term for the garrett turbos. We are talking about fan blades. Not that difficult to desgn. they were perfect designs 30 years ago. And garrett balistic concept turbos were designed twenty years ago. They are not new. Just recently marketed.

I would stick with your 3071 the way it is. I have done back to back swaps from .63 to .82 housings and have seen nothing gained in horsepower only a 400 rpm spool loss. This was done at the 450hp level where an .82 is of no benifit. The .82 will be needed to squeeze 600whp.

 

How do you get to 600 WHP when Garrett states the 30R's will only make up to 500 crank hp? Am I missing something?

 

Nos.. lol j/k

 

A little help here... what do you mean by Garrett downsizing the 3071?

 

They are using a 56mm wheel instead of 60mm turbine wheel. Which just happens to be similar to a HKS 2835R .

 

Get a gt42r with a 1.05 back housing.... full boost should be around 6379rpm. (LOL)