Who's running more than 15psi of boost?

**Jected** · 01-18-2011, 08:05 PM

Originally Posted by HemiSam

Great thread, Speedy.

Did anyone try tuning as an option to keep the 2-bar sensor for the higher boost and give up or did you guys simply jump over to the 3-bar?

Jected - how does the aftermarket ECU work (and what are you using)? Specifically, is it only engine specific or does also see to other functions? Trying to get my head around this.

HemiSam

Running a MOTEC system (M800). Controls everything from excelerator pedal to fans. Still run the drive by wire TB (originally had Arrington 90MM TB, now a 160mm monoblade) which meant that anything that sent a signal or had a module/sensor needed to be interpreted and coded for it to work. Example of how tied in everything is the the ECU, to code the throttle body, the excelerator pedal needed to be sent off with the TB to be coded to enable it to work with the M800.

All the sensors required the signals to be interpreted and coded to the M800 which was good because this then enabled them to tie into and work with the OEM CAN-BUS system. This meant info I could see on the dash was still available such as details on the trans (T400) that shows the gear I am in on the dash (like factory - http://www.youtube.com/watch?v=3FxfW-_S2b0) as well as dipping the mirror when in reverse. All of the dash works functions and readings work, as does the radio, aircon, airbags, speedo, rpm, EVIC etc etc etc)

Saying it was a HUGE JOB is an understatement but so glad I went that path. I have full control over everything which made tuning for the guys a breeze. Hope that helps

**HemiSam** · 01-18-2011, 08:13 PM

Thanks, Jected. I had a feeling you were gonna say that... Big job indeed! Sounds awesome though.

The 2009+ 5.7 ECM and the VVT is keeping it interesting, but I have to say my car runs great. Just seem to be one of the first to hit 2-bar with this setup so we're learning.

HemiSam

**MagnumRT05** · 01-18-2011, 10:28 PM

Originally Posted by flpaul

i have been 20 psi on at 6.1 for 2 years on a 2 bar with no problems, why would u need a 3 bar

You need a 3-bar to take advantage of the VE tables available for higher boost. Its not really needed, but you arent taking full advantage of boost/fuel/tuning stuff out of the 2-bar range as you are just maxing out and running across the top of the VE tables.

**flpaul** · 01-18-2011, 10:32 PM

who makes a 3 bar that i can just plug in like my 2 bar in a srt8

**MagnumRT05** · 01-18-2011, 10:40 PM

Any Dodge dealership should have the Caliber stuff. Or you can buy it at the link posted on the 1st page.

**HEMI~C~** · 01-20-2011, 06:04 PM

The caliber 3 bar sensor requires an adapter to fit our manifold, hence the link.

**Johnparts** · 01-20-2011, 10:28 PM

What map are you all using because the factory srt4 neon map is a 2.5 bar sensor. The stage 3 srt4 map from mopar is a 3 bar. So what 2 bar are you guys using?

**MagnumRT05** · 01-20-2011, 10:39 PM

Originally Posted by Johnparts

What map are you all using because the factory srt4 neon map is a 2.5 bar sensor. The stage 3 srt4 map from mopar is a 3 bar. So what 2 bar are you guys using?

I think its actually a 2.2500000 bar MAP. But whos counting. Its still not enough for the 16/17+psi guys.

**hemidup** · 01-21-2011, 12:04 AM

Originally Posted by MagnumRT05

I think its actually a 2.2500000 bar MAP. But whos counting. Its still not enough for the 16/17+psi guys.

I use the SRT4 map sensor. It freaked out around 17 psi and I went into limp everytime, so I just install a map clamp and it solved my limp issues.

**HemiSam** · 01-21-2011, 09:46 AM

Here's some info on the map clamp for those that didn't know, like myself :-)

HemiSam

http://www.srtforums.com/forums/f75/...-clamp-349656/

**Speedy!** · 01-21-2011, 10:40 AM

Originally Posted by HemiSam

Here's some info on the map clamp for those that didn't know, like myself :-)

HemiSam

http://www.srtforums.com/forums/f75/...-clamp-349656/

Anyone explain how that helps? Seems like it just keeps the MAP from seeing over a certain amount of boost, but I don't see how that helps someone with a 2BAR map that wants 17lbs of boost?

**HemiSam** · 01-21-2011, 10:54 AM

I'm thinking it keeps the voltage at a certain level and then they tune for that. Kind of an electro approach to a fix vs a tuning fix or an increase in MAP fix. Don't know that this helps get the granularity back you'd have in the tables by having a lower MAP sensor though. Dunno.

HemiSam