AMS has even qouted 20PSI by 3800, that is fast, I would immage 30PSI somewhere in the 4000's. Can the 50trim hold 30PSI on a 2.0 to 8000 RPM's?

 

I would like to see a psi graph from the dyno or a log...just because torque peak is at 4600rpm doesn't mean thats exactly where full boost is!

 

Haha seriously Warr.

Sheeeet, I hit 20 psi at 1500 rpms in fifth gear towing a boat up Mt. Washington.....

Scorke

 

Yes, but the point where the torque stops climbing is basically where it hits full boost. We rarely, if ever, get boost vs rpm logs, so we can only go off the torque ramp-up. Plus, it's all relative anyway. However earlier (or later) it spools than that peak tq point will be similar for a stock turbo. What really matters is the difference in rpm between those peak tq points from one to the next. In this case, it's almost a clear 1000rpm.

 

Ding ding ding. My peak TQ hits around 3600-3800 rpm.....full boost hits @ 3000 rpm ~21 psi

 

Nice....

 

No chance.

 

What matters is this turbo is not laggy at all. I think it's the perfect street/strip turbo with potential to make over 500 hp at the wheels with supporting mods. It pulls hard till redine and is a blast to drive!

 

This is the route I am going...When I find a good deal and have the cash!!

 

You guys can make jokes on me but all I am doing is passing on info relayed to me by AMS. I am sorry for making such a "rediculous claim."

Scorke,

Most of your posts are really good, I actually think most of your stuff is good.

Warr.

You make some very good points but I am telling you what, you make some people feel really stupid when they are new to the import scene.

Anyway's, one would tend to think that AMS knows there information, if they are guessing that it will be in that 3400-3600 rpms I might lean that route. But hell we all could be wrong and spool up like a 42R....

 

Quote:
Originally Posted by GgreyEVOIX
Ding ding ding. My peak TQ hits around 3600-3800 rpm.....full boost hits @ 3000 rpm ~21 psi





Ever Hear the Term "Break Boost" Quite amazing actually, just hit the gas and the hit the break slightly, feed in the throttle yet do not accelerate, amazingly the boost builds at low RPM's. I have Seen stock Turbo IX graphs where it spools VERY, FYI an Evo IX FQ360 has PEAK torque at 3200RPM, that's with a cat, immagine without one.

 

The torque seems lows doesnt it?

 

It is and it isn't. The Evo is able to SPIKE to a certain FP of torque, then fall off. The 50trim is lagier and more progressive so it won't spike as easilly, but it holds boost and torque for longer. The Initial "THWACK" we all know and love is gone, but the mid and topend is just far far faster.

 

High_PSI, we obviously weren't talking about brake-boosting, so not sure why you mentioned it. We're talking about where the turbo spools fully as shown by the torque ramp on the dynograph. If you have a dynograph of an FQ360 where the torque spikes at 3200rpm, I'd love to see it. However, that is not a USDM IX. Almost all of the IX dynographs I've seen here on EvoM had peak torque around 3800rpm while most people try to claim spoolup at 3000rpm. It's simply not true, because they're basing it off watching their tach while driving and some try to make claims based off 5th gear (obviously more load).

2003lancer guy, AMS knows far more than I ever know, but in the context of THIS dynograph, which shows empirical proof of spoolup rpm, it is unlikely that a stroker would cause the 50 trim to have the same torque ramp-up at 3400rpm. If it does, then I'd be elated, because that is my road racing plan: 2.3L stroker + BB 50trim. I just haven't seen _any_ dynographs to support this notion.

 

You can't use a Dyno to show spoolup, especially a Dynojet, it just doesn't load the car properly, not to mention the extra 160 pound driver to add load while driving and so on. i tmay give you an idea, but certainly isn't 100% accuate and will for certain spool faster on the street.

I believe that a properly tuned BB 50 Trim (Especially of the BB Variety) would in fact hit 20PSI under 4000RPM's.