Maxing Small 21u Rb25det R33 Turbine Housing With High Flow. What Power Would You Expect?

[R31Nismoid]

impressive, but, to me it looks laggy for a std 33 housing! never thought id say that about a factory housing lol.

a bar at ~3700 and full boost at ~4000.

I also agree.

In response trent, even bringing the ramp rate up and earlier/more power it'd just drop off sooner anyway so you still get a reasonable idea of what to expect.

(^^ in reference to what im gonna go into below)

It's interesting regardless of housing size all these turbos have the sameissue. (im assuming also different turbine wheels as well as housing?).

Power drops sharp come @ 6500rpm again, leaves only around 2500-3000rpm power range (3500/4000-6500)

Given boost holds but power drops its looking like the rear housing is just choking it up too hard.

Really need to see these things hold 7000rpm if not a tad more IMO to give you a better spread.

They make power like a 500-550 turbo (with the lag), but nose over like a 400-450hp turbo. Kinda odd...

[Rolls]

@ 270 we could do run after run without issue @ 290+ it was starting to heat up and required constant timing chances to keep it happy. do 2 or 3 runs and the timing would fall back to where it was @ 270... then it would do run after run @ that timing all day long with around 3 degrees headroom

could you use an intake temp sensor and trim the ignition based on that?

[hypergear]

This is the high ramp run. We did this for a checkup. Means there is more drag on the wheels, the idea of doing this is to make sure the engine doesn't pin when under greater load or going up hill. Its a longer run, the afr leans out more which result in more power (from what I've understand).

Some tuners would give you this reading as your final run to make you happy and loyal.

I'm honest in my work, to clients and customers. My tuners are Status and Dr.drift. All results I've posted are based on normal ramp speed. Which still are the most out standing in SAU's dynosheet stack in terms of the what they are and their build purpose (no jungle juice either, 98 fuel all the way).

[STATUS]

could you use an intake temp sensor and trim the ignition based on that?

not on the ecu it has, if it had the trim tables then yes but even then it was a little ragged.