N52 intake shootout

[hoveringuy]

The other thing to is check how they are getting the rpm signal and that it is correct as that can skew torque

Yeah, It noticed that as well, Dynojet always has a pickup to get actual motor RPM, this one uses a scaling factor to convert roller speed to tach rpm, so the best they do is hold it at 2000 and make sure the tach matches the display.

This dyno is valid for the moment as an "apples to apples" comparison of the same motor on the same dyno with different configurations, but when I get it done Ill need to throw it on the Dynojet to get numbers that can be compared to other Dynojet numbers.

[digger]

Not Dynojet, it's a magneto-resistance one that's supposedly calibrated to match Dynojet (there's a Dynojet up the road and they say cars are the same on the two)
Nice thing about this one is it's perfect for holding part-throttle load for data logging and fuel corrections.

We werent holding it that long because it was pointless.

when you get things sorted just put it on an actual dynojet for some numbers that mean something in an absolute sense when said and done, operators are always talking BS. when they say calibrated to a dyno jet they just mean they fudging numbers which makes them kind of useless as the differences between dynos change depending on which vehicle is used as the "calibration" and you cant calibrate the curve just to a peak so very easy to create a random number generator. The other thing to is check how they are getting the rpm signal and that it is correct as that can skew torque

[DEV0 E30]

Thanks again for sharing and improving this swap for everyone else.

[LukeJ]

Dang it! haha. This is some good info here.

I guess I have some more work to do....

Thanks!

[hoveringuy]

What type of dyno? Are you Reving out to 7800?

Not Dynojet, it's a magneto-resistance one that's supposedly calibrated to match Dynojet (there's a Dynojet up the road and they say cars are the same on the two)
Nice thing about this one is it's perfect for holding part-throttle load for data logging and fuel corrections.

We werent holding it that long because it was pointless.

[moatilliatta]

What type of dyno? Are you Reving out to 7800?

[hoveringuy]

Baseline dyno!

Good news and bad news...

The good news is that I've picked up 17 torques at 3100. Interestingly, both graphs have peak torque at exactly 3168. What are the odds? There's a 10-15hp boost all the way to almost 5000.

The not as good news is that the motor kinda dies by 6000, but nando quickly noticed that the torque curve doesn't have the characteristic torque peaks that other N52's have. INPA shows that the DISA valves are opening and closing, and I can hear them "click" but removing them showed that it was bound-up at best and then it was stuck closed, so two new DISA valves are in the mail (they're at risk of disintegrating at this age, anyway)

That's opportunity #1, number 2 is that the A/F until around 4500 was in the 15.5 range, so there's room for a better fuel map which should bump power. The thought of getting 270ft-lbs is just delicious, show me an S54 that makes 270 ft-lbs....

The dyno is something of a dick measuring contest, what's more important is how the car feels to drive and from 6th gear on the freeway to getting groceries it's awesome now, it sure feels like 262 ft-lbs.

[hoveringuy]

I finally got the DISA-enabled ECU and had a chance for a quick test drive. What a hoot!

Next step is to put a few miles on it and take it to the dyno...

[hoveringuy]

I know you went booster delete, so for those with booster'd setups, time will tell what sort of combo will work with that.

Spoiler alert, before I bolted everything I test-fit a Tesla booster. Clears fine.
Note: All the cool kids are running the CR-V remote reservoir (there's a picture of an S54 car with that setup somewhere....) that gives even more room.

[DEV0 E30]

There is some data on this already, N54 intake mod was widely discussed starting around 2016 and there are some before/after dyno plots that show an increase in top-end power, but most of the threads devolve into name-calling and nothing really shows real-world performance. My theory is that I spend more time accelerating between corners in the the 4k rpm range than drag-racing down the straight at 7500, so lap times would really be the ultimate barometer, plus not everyone cares about power at 7000 but just wants useable power for commuting.

I think that's a valid theory and thought process.

More power down low to keep up with a Chrysler Pacifica and overtake a Toyota Sienna with more ease would be nice. I know you went booster delete, so for those with booster'd setups, time will tell what sort of combo will work with that.

EDIT: OH MY LAWD WE HAVE A SECTION BOYS, ITS A CHRISTMAS MIRACLE.

[hoveringuy]

Following this thread for science!

There is some data on this already, N54 intake mod was widely discussed starting around 2016 and there are some before/after dyno plots that show an increase in top-end power, but most of the threads devolve into name-calling and nothing really shows real-world performance. My theory is that I spend more time accelerating between corners in the the 4k rpm range than drag-racing down the straight at 7500, so lap times would really be the ultimate barometer, plus not everyone cares about power at 7000 but just wants useable power for commuting.

[DEV0 E30]

This aligns with my interests, looking forward to all your findings.

[Panici]

Following this thread for science!

[2mAn]

Yay! I love hoveringuy experiments

[LukeJ]

Excited to find out the pros and cons of each manifold.