Did you guys ever get dyno plots for your 3071 and 2871 kits? I'm trying to get an idea of what kind of torque curve each kit produces on pump gas...

l8r)

 

The 2871 is a great turbo. However, I just dont see what it's being used on our EVOS as its = to stock turbo. It does spool better because it d BB but the stock turbo can be made to spool so early with DP, manifold etc... My brother has the 2871 on his GTI 1.8T and he loves it but I just cant see why its being used on the EVO. I might be not seeing the reason??? but I would like to know more about that turbo as well and how it works with our EVOS.

Thanks

 

well so far, for what I'm looking for, some of the most impressive results for a pump setup have been the big 16G setups (aka MR turbo). I've seen a dyno plot of your 3071 kit, Az3ar, and while it makes nice max torque, it seems to really run out of steam at higher rpms. Of course this might be because you don't have all of the supporting mods in place yet ... but I haven't found a dyno run for a fully built 3071 on an Evo yet. I'm also hoping that the 2871 will spool the same or better than stock and produce more power up top than the stock turbo. The stock turbo is really great ... it just runs out of steam past 5500 rpms or so.

l8r)

 

The 2871 will spool better than our stock turbo, thats for sure. I think it will give you full boost by 2900 RPM or so. I dont know about top end on that turbo?? I agree our stock turbo is a great turbo and it does make alot of power in midrange. I am sure that the 3071 will hold it breth with all the supporting till 8000 RPM ( you can see the maps on ATP site now) However I would love to see an EVO with 2871 I am sure it will make a small track monster.

 

We are working on it right now guys. the biggest problem we have is that car testing them has our stroker kit in it so the numbers are going to be off. As soon as we have them so will you. I will say the GT2871 is a GREAT autocross turbo. Spools quicker then the stock makes more power and keeps making it into the higher RPM's the 3071 is even more fierce with slightly later then stock spool but good for 450+ hp.

Eric

 

the 450+ is assuming racegas, though, right? The reason I'm really interested in the comparison is that on 93 Octane, the 2871 might be the better choice, since it should give a wider powerband, no?

l8r)

 

The GT2871 will make slightly more power on pump gas than the stock turbo. On race gas it has potential to make about 440whp.

 

I truly believe that the 2871 is great track little turbo. I thank AMS for having great choices..

 

I would be interested in seeing some dyno charts of the 3071 and/or 2871 installed on a stroker motor.

 

Why does your website say the 2871 is capable of 525hp?

I am interested in gaining some hp from a turbo kit that doesnt sacrifice spool up. However, you mentioned above that the 2871 "will make slightly more on pump gas". Is that just a peak number? Is there more meat to the torque curve with the 2871 prior to peak hp or does the 2871 just generate slightly more power across the board, more of an offset in power?

oh yeah, these questions are in reference to running 91 octane pump gas.

Thanks

 

the GT2871 made 420whp on an all wheel drive dyno. That was not maxed out (23psi) and the car had some room as far as more mods go. I'm guessing the turbo would make about 440-450whp once maxed out. So far it looks like the GT3071 might be a better choice. Only slightly lower spool but reduced exh. backpressure (more power on pump gas) and more horsepower potential. Potential should be 440-460whp. 525crank hp equates to about 420-440whp on an AWD dyno. The 3071 should be good for about 550crank hp. Again most of these numbers are real dyno data or very close estimates. For road race guys, you would be very happy with the GT3071R kit.

-Martin

 

Do you happen to have a 4wd dyno plot of your 35R kit with and without pump gas?

 

Martin, do you think the 3071 could hit 400whp (Porsche Exchange dyno) on 93 Octane?

l8r)

 

I am fairly certain that turbo could come very very close if not hit that mark on 93

Eric

 

There are still a lot of people interested in your "smaller" turbo's pump gas graphs. Many, many owners will never use race gas. I, personally, in the future will be looking to produce the fattest, widest power band possible on good old 93 octane...