Hi,

I recently got my autox car up and running with a newly installed jrsc.

Previously I had a Toda itb + cams setup, but decided for more down low Tq that a blower might be the way to go.

Setup:

91 si
B18c5
Gsr intake cam / itr exhaust cam
Kamikaze header
Mvm stepper pulley
ATS tranny
Speedfactory 4 bar map sensor

Now I was running crome pro without issue on my itb setup.
I'm using a base map and street tuning, but whenever I get up to about 4psi or simply go wot, the car falls on it's face.

It runs good partial throttle, but when I go wide open it simply bogs out.

What can I check to make sure it isn't the tuning software?

*edit*

I posted on pgmfi re: the map sensor:


This is what I'm using:



The specs on the sensor are 0-5v.


Crome asks for the following when I choose the only 4 bar option (xenocron 4 bar) for boost tools:



defaults
min - 34.7 - mbar
max - 4000 - mbar
koeov - 1.23 - volts

Is this right?

Or what should I be using as values for each of these?



Also, I'm thinking it's a setting in crome.

I found some settings that pull timing by 5deg based on iat being 150deg or more.



I'm changing that setting and going to try again.

 

Check the specs of your map sensor and see if it matches the input numbers. Could be different. Also, I've seen the vac lines go bad on the map sensors and you get huge leaks in boost which cause issues. Check that.

 

I got speedfactory to email me the spec sheet for the 4 bar map sensor:

SpeedFactory MAP Sensor Data

2.5 Bar Map Sensor
Hondata or Neptune Settings:
Scalar(mBar/volt):504
Offset(mbar):70
Crome Settings:
Min: 100 mbar
Max: 2590 mbar
Koeov: 1.83 volts

3 Bar Map Sensor
Hondata or Neptune Settings:
Scalar: 617
Offset: 11
Crome Settings:
Min: 11.1 mbar
Max: 3040 mbar
Koeov: 1.65 volts
4 Bar Map Sensor
Hondata or Neptune Settings:
Scalar: 838
Offset: 31

Crome Settings:
Min: 34.7 mbar
Max: 4000 mbar
Koeov: 1.23 volts

AEM Settings:
MIN=0
MAX=4.8
LOAD OFF SET=0
LOAD SCALAR=4.0
7 Bar Map Sensor
Scalar: 1582
Offset: -351

Voltage to pressure (KPA) conversion
P= pressure in KPA 4 bar = 400 KPA
Voltage out/signal = 5 X (.002421 X P - .00842)
Atmosphere equals 1 bar or 100 KPA = 5 X (.002421 X 100 - .00842) = 1.168 volts @ 1 bar or 100 KPA
1bar = 100KPA = 14.5PSI = 1000millibar

 

What is your target PSI? The 4 bar sensor is going to drastically reduce the resolution.

 

Fuuuu I'm so frustrated!

Here's a vid of the car falling on it's face when I go wot - it only makes 2-4psi at that point.



And it runs and accelerates fine at partial throttle.

I'm stumped.

I've changed map sensors - from 4bar to stock (which actually made it worse), and checked the bypass valve, vacuum lines, settings in the software, everything I can think of.

 

Target psi?

The current pulley setup should net me 7.6psi.

But the inability to go wot without it falling on it's face is preventing that.

 

have you logged your afr while it's doing this just to see what it's doing

 

It has got to be your "tune" let me see if I can open it and find any error.

 

Unfortunately you have not uploaded your file to PGMFI, so I am unable to take a look.

What injectors are you using?

Are you sure its not cutting out from being too lean or too rich?

Do you have any type of lean protection enabled?

What do you have boost cut set to?

 

Yes.

Initially I thought that was the problem, so I tuned up to 2psi but it's like it hits a wall.
It is at 12:1 af ratio at 2-4psi.

 

I don't doubt that, as I haven't been able to tune much except low rpm partial throttle due to the issue in question.



I will upload the bin to pgmfi or email it to you directly.

I am using RC 550cc saturated injectors.

That thought had occurred to me, but even getting it to 12:1 af ratio resulted in the same power loss at wot.

I don't have any lean protection enabled that I know of - it was pig rich previously.

I believe boost cut is set at 12psi because it will never get there with the current configuration.

 

Just upload to pgmfi, if anyone else has any time they can see it there as well

 

I attached the .bin and .dlf to my 2nd post in this thread:

http://forum.pgmfi.org/viewtopic.php?f=35&t=23885

 

hope this gets sorted soon

 

Thanks Grim.

I keep thinking it must be some simple setting in crome, but I've been over every setting 3x and can't find it.

If I didn't know better, I'd say it was a boost cut that retards ignition.

But I can't find any setting like that.

I started to use my aem ems instead but it gets some kind of connection error.

I went to use s200b and it needs some update + since I have long since changed laptops it probably wants a reg code or something.

 

s200 shouldnt need any code Hondata is free ware
and if you did you could convert a jrsc s300 base map for it
or get one from theHondata forum

 

OK.... I got your MAP.

I have found a few inconsistencies, I suggest starting over.

 

I've seen this before on another JRSC setup. Its acting like the MAP sensor isnt seeing boost.

I don't have Crome pro so I can't see your data log.
1.) How much boost does crome datalog when this occurs?
2.) DO you have a boost gauge and does it match the datalog when this happens?
3.) Whats the AFR when this happens?
4.) Where is your MAP sensor getting its pressure reference from?

 

Hi Muckman,

1) between 2 to 4psi and even less. It seems to be more wot + boost related. (Columns 10+

2) no boost gauge. I'm installing one now just to find out.

3) 11.5:1 to about 12:1

4) from the jrsc manifold - post blower:

 

You are complicating things with the 4 bar, there are a number of tables in the advanced settings tables that have been improperly modified.

 

1. Clean/sand transmission ground points thoroughly. Test

2. Replace throttle body with original TPS/rivits + MAP. Upload previous .bin for stock map sensor or create or new bin and upload. Test. Using current uploaded bin with this test is ideal however.

 

Natural Aspirations sent me a good .bin and it works!

The issue was the .bin file I was using.

I am currently using the stock map sensor with his .bin file and tweaking from there.

NA, thank you so much!

Send me your PayPal info!

Btw, what plugins did you have loaded?
Just advanced boost tools and quick data logging + remove checksum?

 

No need to pay, glad to help.

Boost tools, fuel tools, quick logging. And remove checksum

 

Fantastic .. now get that thing tuned

 

One more question:

Do I need to uninstall all my other plugins like itbtools+ etc?

Will they interfere as I'm trying to tune?