New Garrett GTX2867r

[codyace]

Originally Posted by LuckyX2

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These guys are expecting to get close to 400whp at 23psi and already got 359whp out of 19.9psi. Boost came on almost as quick as stock and all this without a boost controller too. However they do have a compression advantage.

I'm not liking how their torque falls off though.

Well, as much as I hate to be debby downer, but we made 360 at 17/18 psi on a 28RS, on a Sentra...And made similar power with 18 psi on a RWD DET. Both cars were running Rom Tunes (Sentra JWT, 240 Enthalpy)...

I know I know, dyno racing is dyno racing...but it is what it is.

Now for the rest of the answer read below:

Originally Posted by cotbu

you first need to know where you land on the map, then which way your going. You don't just move straight up!

100%. For LuckyX2, (and this is VERY generic so none of you coolguys get too worked up over this) you need to remember that the X axis determines airflow (and total HP ability) while the Y axis determines boost ability. Sure you may be able to run 20+ PSI and still be on the chart, you will not be making any more total HP.

So while the 28RS is really maxing out at the 350-360 hp range (sure you could make more, at the expense of heat), the 2863 does seem to allow 400whp at moderate boost....but again, the 2871r does the same thing (albiet at less cost). When you overlay the 63 vs 67 you'll see that the 67 obviously supports more airflow without running out of steam, as well as still having that airflow ability with more boost.

Are the differences much over the 2871r? So far I think so...the car really comes into boost nicer...so while the graph of power over RPM may not be drastic, I can assure you that the graph over time will be a lot nicer. It just stinks that it's hard to compare graphs over time on a consistant basis.