I think we are saying the same thing. I have logged it maxing at 22psi with the actual car running 24-25psi. However that is not with a AP.

I was just sharing a data point that yes there is a factory cap on the max boost the Ecu is reporting while logged, much like airflow hz, etc.

 

Remember the displayed value is in MAP Absolute - so it's only showing about 3.5 PSI of *boost* pressure. So it's NOT showing the same thing. The AP display is in absolute pressure while your reference to boost pressures of 24-25 are gauge pressure. Not same.

Additionally there appears to also be a conversion issue with load - the display tops out at 4801.1.

 

Yes they are the same when I have already done the conversion with factoring atmospheric in.

The logger I am using maxes at 255 kPa = 36.9psi - 14.7 = 22.2 psi

I would imagine the AP's 18psi is with all the conversion factored in already as well.

Everyone is trying to be top Mr. Smarty Pants, it's just confusing everyone else at this point.

 

LOL owned by Bryan. Rob@cobb, check your pants at the door, razorlab *might* know a thing or two and instead of re-iterating it, maybe just stick to a 'yea you're right'

razorlab ftw!

 

well Rob is correct as well, with the AP he is maxing at 18, with the logger I am talking about I am maxing at 22.

 

what mods will stage 2 require and what is the power difference between 1 and 2? i know when i had the STi, 1 and 2 was night and day... especially with the help of equal length headers

 

Ditto and when is your exhaust going to be out Rob?

 

+1 Very interested

 

a couple questions.
1. i saw the % increase on whp cobb has on their site using the ap, but have they posted any real numbers we can expect to gain with the ap?
2. i have read a lot about the x's being very diverse straight from the factory, so diverse that when it comes to tuning some tuners (rre) would much rather tune each car on a dyno than do a mail in flash. How do x's react to the ap given these circumstances?

 

1) The numbers are from a off the shelf map. I think that a couple of the AP vendors have comfirmed in most cases its making at least 30 more whp and up to 45-50whp. This is just with a Stage 1 Off the Shelf map, which would be fairly conservative from what I understand. I hear that Cobbs Stage 2 stuff is more impressive.

2)You are correct the Xs dyno from 220 to 250whp stock. There is some variance in how each car runs, but Im sure the off the shelf map was made conservative so it will be very safe.

3)I think if you talk to anyone on here about a tune on any car not just an X a custom tune is superior than any mailin or shelf map. Im also sure any tuner would want to put a car on the dyno to tune cause; 1 they will get you better results therefore making them look better to you and the public, 2 they make a little more money, and 3 it will probably be safer.

 

Sandman picked up most of the answers. A tune on a proper dyno with a good tuner is hard to beat when pushing the car to it's limits or with a heavily modified car. If a good tuner happens to be no where near your area or you have a favorite out of state tuner in mind, they'll be able to get you a mail map with 95-99% of the power and still be very safe.

#2 may stem back to the Evo VIII/IX and before. They do seem to be off car to car when it came to power and motor response. Especially as they age. So far it seems the Evo X is a bit better about consistency, but that may be due to a number of factors. One being the ECU is more adaptive to hitting it's programmed targets. Quite honestly, the Evo X is more difficult to correctly tune than the previous generation Evos.

Either way, if the Evo X is healthy, no mechanical problems, there should be no issues making save and reliable power. If there are mechanical issues, the ECU has great safeguards in place keep the motor safe. A good tuner should be able to pick up any issues through data logs.

Rob

 

I'm working on finding out right now.

Thanks,
Rob

 

I have Stage 1 with a HKS Drop In, and i was showing my friend the launch control feature, held the launch control at 5.5k for <4 seconds and the CEL came on, P1235. I reset it with the AP. Was wondering what that was.

 

Sounds like the limit maps need to be tweaked for that RPM and load.

 

Bryan would be correct. When running launch control on the MR it will build boost/load. It may be building more load that the ECU is programmed to accept.

How long were you running the launch control before the code was thrown?

I'll look to see if there are separate load limits on the launch control.

Thanks,
Rob