+1, everyone says the 3076r lag is almost as bad as a 35r, but in most cases the 35r spools 700+rpm later than the 3076r, which to me seems like a big difference. the 35r is a great turbo, but if you live in a high elevation area as myself, it becomes a tough choice compared to the 3076r.

Currently, im having a tough time trying to decide on a turbo upgrade. the elevation where is live is 6500ft above sea level. on the 35r, spool would be 5k+rpm, not sure if its still worth it even though my car is not a daily driver and more of a street/drag race car. my choices therefore are either the evo ix 20g or the 3076r. i dont know which would be the better choice to run on pump and alky? the 50trim looks nice and makes good numbers, but it seems like the 3076r is recommended more, not exactly sure why.

 

Pretty much any decent cam is fine (please no flames) ... it's just a matter of what you want. HKS 272's, for example, will give you slightly later spoolup than HKS 264s, but tend to hold torque better in the upper rpms. As far as your goal is concerned, there are simply too many variables to say for sure, but with a 3076 you "should" be close to where you want to be at as far as the powerband goes.

l8r)

 

I have had a lot of experience with the 3076R, as we sell them on our stage2 GT kits. I think it really is an exceptional turbo, and its incredible how much can be done with them.

One thing to note, however, it really likes a big A/R. We generally use a .82 and in high power cases a 1.06. It always spools at least 600+ rpm faster than a gt35R and can still make close to 600whp.

Most people on here running the turbo seem to use the .63, which i think is why you havent seen great #s or performance out of them.

I really think more people should consider this turbo. We have a very interesting compressor housing coming out for these turbos soon, which we have proven to improve the compressor efficiency

 

I am assuming you run a .63 a/r?



I think you are definatley on the right track. the spool difference between 4k rpm and 5k rpm is very noticeable!

 

yep.

l8r)

 

So you should use a .82 housing on a 3076R? How much power does that increase over a .63 and how much LAG does it offer over a .63?

 

OK fellas what is the best all around streetalbe turbo for me as I am not a drag racer, I love to auto cross and track day events and would like a slight upgrade from stock. I drive an 03. Is the XI turbo the logical choice or the 3076? Or anything else?

 

3076R would make over 500WHP, the IX turbo is a little more capable then the 05 turbos in that it is more effiecent with a larger compressor side and no surge.

 

this is a very good question, and one that I think a lot of evo owners have. Ill try to answer this in the most neutral manner, based on my experience.

First and foremost, the choice between a 3076 and the IX turbo are totally different. The 3076 is a complete revamp of the entire system, while the IX turbo is really just a turbo upgrade.

I strongly recommend revamping the entire system to a Garrett based turbo. The main reason being that it can grow with you. If you ever want to change the behavior/powerband/application of the car, you can simply swap turbos. Whether you want lightning fast response to 400 whp or if you want a 750+ whp monster.

If you are using a stock based turbo, your upgrade path is severely limited, and the majority of the parts you invest in must be replaced to go to a garrett turbo.

If you are on a tight budget, however, the stock turbo is definately the way to go. It has been proven to work very well, and with a new turbo, new downpipe/o2housing/exhaust/charge pipes, you can have a very fun vehicle for not too much money.

If you can afford it, nothing comes close to the performance of a properly designed and setup GT based turbo system.

 

+1 to Geoff's answer ... one of the reasons I went with the GT3071 is because I can always up the ante, so-to-speak.

For Auto-X, the 3071 is probably the biggest turbo you'll want. IMO the 3076 is just too laggy for short blasts around an auto-x course. However, the performance of the IX turbo is looking very promising and will probably be very close (especially on pump gas) to a 3071 setup, with the IX turbo spooling a little earlier. Unfortunately this is pure speculation right now, since I don't think we've seen an IX turbo mated up to an '03 yet.

l8r)

 

I was thinking strongly about the 3076. It's nice to hear from a respected turbo dude that it's a good choice.

 

BUMP!!!!!!!!!!

 

i personally am not a huge fan of the 3071R as i feel it has more turbine wheel than is necessary for that 71 compressor wheel.

If you are running the 71, i would rather use a 2871R with a T3 turbine housing. This would give you the same overall power as the 3071R with the spool of a 28RS

 

power increase is dependant on a number of factors, ranging from boost level, camshafts, intake manifold etc etc... lag difference is about 150-200 rpm, sometimes less

 

I agree. Which is why Garrett is now using the smaller 56mm wheel instead of the 60mm.