Wide band 14.7????

[my98gsx]

I just bought a wideband kit for my 98 GSX. In the paper work it said that 14.7 is "ideal" conditions... Is this true? - when tuning should i try to get as close as this as possible?Whats the point of too lean, or too rich? - I had my car dyno tuned at Victor Research and looking at my dyno sheet they tuned it so 11.7? if so my car was running very rich and would explain why a fully built 2.3 stroker engine & 57 trim turbo only made 372whp... Slowboy said that thats very low numbers! - look for your self http://youtube.com/watch?v=gGhwmgdlrhg

 

[silver bullit]

How many psi and how many miles on the turbo and motor?

 

[my98gsx]

haha funny you ask... engine... had 1,000 miles on it. - blew up at 1,200 miles ( right after it was tuned ) now its a 2.4L bored .040 over. The turbo was also 1,000miles on it and i was running 20psi. - they said it was the most i could run blah blah again talking to slowboy they said at least run 24 on an engine like mine.

 

[silver bullit]

Do you have ARP Headbolts, metal headgaskit, stock or higher compression pistons what kind of turbo and what is the max hp it is rated to, why did the motor fail last time, how is the condition of the turbo, any shaft play?

Also 14.7 is probably the 14.7 pounds air to 1 pound of fuel required to burn both completely.

 

[silvermitsu10]

14.7 is stoich. Meaning the correct misture to burn al the air and fuel.Leaner maks more power to a point, but it also increases EGT as well as in cylinder temps. If I'm not mistaken a leaner condition is also a little more suceptible to knock. But I am not sure on that one. 14.7 is what the manufacturers try to get the stock ecu to hold. it's kinda a fair medium between power, economy, and wear on the engine. I'm not sure what most dsmers tune for but I would think it would be around 11.5 to 12.5.

 

[kairles]

14.7 is what the manufacturers try to get the stock ecu to hold. it's kinda a fair medium between power, economy, and wear on the engine.

yup, don't know about engine wear. also has to do with emissions. Its ideal for cruise and part throttle stuff like that. your tuner most likly turned you car at 11.7 for WOT.

 

[linksys42]

Like silvermitsu10 said 14.7:1 is stoich. Its what the ecu is shooting for while at idle or cruising at a constant speed for a good burn/fuel economy. The 11.7:1 is what they were shooting for on a WOT pull in 3rd gear. What size injectors are you running with that 57 trim? Im guessing that the reason they only upped the boost to 20 psi is because they ran out of injector? Just out of curiosity why are you still using a maft and safc to tune with? When you have put so much cash into that long block? Just wondering why you haven’t gone with dsmlink?

 

[my98gsx]

Ok, alot of people have asked me questions about the engine and turbo so heres a list

Block: Eagle 100mm crank, Eagle Rods, Weisco 9:1 comp .040 pistons., Arp Main, rod and Head Studs, Commetic Head Gasket, Balance shafts removed, balanced rotating assembely.

Head: Webb 272 cams, Crowler valves, Crowler springs/retainers, ported and polished runners.

Turbo: Percision/Garret 57trim ( NO shaft play BRAND NEW! ) - only a few miles on it - garrett rebuilt it only a few months ago. - rated MAX hp @ 545hp

As for my injectors im running 850cc injectors thats why i know i can go up more than 20psi ( i did that on my stock block ) - My problem about going to DsmLink is that i live in NY. I would love to switch over to it, but in NYS any car with OBDII you cannot switch the ecu out. When your car is being inspected you have to plug the ecu into albany for them to pass it. ( and it does NOT matter who you know, i have alot of friends who own shops... there is no way around not pluging your car in....) Thats why im still messing around with the AFC and Maft.

 

[DGajre777]

As for my injectors im running 850cc injectors thats why i know i can go up more than 20psi ( i did that on my stock block ) - My problem about going to DsmLink is that i live in NY. I would love to switch over to it, but in NYS any car with OBDII you cannot switch the ecu out. When your car is being inspected you have to plug the ecu into albany for them to pass it. ( and it does NOT matter who you know, i have alot of friends who own shops... there is no way around not pluging your car in....) Thats why im still messing around with the AFC and Maft.

So... get ECUPlus, you maintain your OBDII and you can do almost everything that DSMLink does, other than getting a stutterbox and a few things.

As for A/F ratio, I say tune for 11.5, keeping an eye on your timing.

 

[my98gsx]

ECUplus?? ive never heard of it? what is it, and if its what i need, where could i get one?

 

[1slo1g]

http://www.ecuplus.com/ there you go, googled it and that what i came up with

 

[chicagoavenger]

DSMlink uses the stock ecu so you are not swapping out your ecu so you should be fine top use it. The AEM uit swaps out the stock ecu maybe that's what your getting confused on.

 

[Artago]

also has to do with emissions.

What is the proper air/fuel ratio to keep emissions low. The reason I'm asking is because I have to pass "AirCare" here in Vancouver before they let my car on the road. Thanks.

 

[laserspeeddemon]

11.7 is a little on the rich side, but it's what I would consider a good conservative tune. You should up the boost and advance timing as far as it will go before you start to knock. That shop did a horrible tune.

 

[DGajre777]

ECUplus?? ive never heard of it? what is it, and if its what i need, where could i get one?

www.ecuplus.com or www.machv.com are the 2 places that I know of that sells it.

And no, you do NOT need a 95 EPROM to run ECUPlus on a 2G, which means you maintain your OBDII.

The ECU+ is an advanced piggyback engine management system for the 1990-1999 turbo Eclipse, Talon, Laser, or Galant VR-4, or 2003-2006 Lancer EVO VIII/IX that gives you complete control over engine fuel flow and timing.

The ECU+ includes a crazy (and growing!) number of features, including:

* Dual fuel and timing maps with on-the-fly map switching. (Unlimited sets of maps can be saved/restored to a laptop.) +/-50% adjustment on the fuel maps and +/-15 degrees on the timing maps.
* Fuel and timing are adjusted via 129-point fuel and timing maps (250 RPM resolution from 1000 to 8000 RPM at four different loads, plus idle). RPMs in-between the discrete points are interpolated internally.
* Integrated injector scaling to support oversized injectors.
* Supports vehicles with wrong-year cam sensors - most useful for 1995-1996 DSMs with a 1997+ cam sensor swap, or a 2nd generation DSM with a 1st generation (6 bolt) motor - eliminates the check-engine light on those setups.
* Simulated front and rear O2 sensor generation.
* Configurable fuel-cut defencer.
* Integrated MAS tweaking capability, similar to the HKS EIDS, to improve idle with large injectors and cams.
* Configurable low/medium/high load thresholds.
* Works directly with the GM 3" and 3.5" MAFs to replace the stock DSM/EVO MAS air meter.
* Fast native datalogging that logs at 25 samples per second.
* Integrated stock ECU datalogging to log things like fuel trims and knock sum.
* Multiple uncommitted I/Os for future expansion and datalogging of analog signals.
* Wideband, boost, EGT and knock logging.
* Knock back-off function to protect your engine from excessive knock.
* Optional plug-n-play capability for the 1995+ DSMs and the EVO VIII/IX - installs in minutes!
* Street dyno capability in the Windows software - treats a WOT run as a dyno pull and plot HP and torque.
* Can "overlay" multiple runs and compare between them on the street dyno or the time plots - immediately see if your tuning resulted in increased HP or if your engine was knocking in a given range.
* Drag capability - treats a 1/4 mile of driving as though it were done on a drag strip - shows 60', 1/8 mile and 1/4 mile speeds and ET
* Integrated full-featured OBD-II code scanner/reader (1995+ DSMs and the EVO VIII/IX). Includes real-time display of engine parameters for OBD-II cars and for the 1G DSMs.
* Launch control and no-lift shifting.
* EVO ROM editing and map tracing that uses EcuFlash-compatible XML ROM definitions.
* Advanced architecture - the ECU+ includes a dedicated high-speed digital signal processor (2x faster than the original ECU+) along with two co-processors for knock and other functions.
* Free software upgrades for the Windows software as well as the firmware inside the ECU+ head unit - software and firmware releases are usually every 6-9 months to add new features, and most updates are available as betas for those who like to be on the bleeding edge.
* Inexpensive and full-featured - you don't have to buy hundreds of dollars worth of extras to tune your car (though a aftermarket wideband O2 kit is highly recommended).
* World-class analysis and tuning software for Windows 98 and up. You won't find better software in any other system. Guaranteed.


1995-1999 Eclipse and Talon
Wire-it-yourself - $449
Plug and play harness - $549

In comparison to DSMlink...

PROS of ECUPlus:
- You don't need an E-PROM
- You can run a GM MAF without a need of buying a MAFT
- Simulated front and rear o2 sensor generation

PROS of DSMLink:
- You need an E-PROM
- You need a MAFT if you want to run a GM MAF
- You get a stutterbox, NTLS and other advance functions.
- Ability to disable CELs and remove all emissions related equipment

 

[DGajre777]

DSMlink uses the stock ecu so you are not swapping out your ecu so you should be fine top use it.

For 1Gs, yes, NOT for 2Gs. On a 2G, you need to have a E-PROM ECU which was only available on 95s. This means that if a 2G owner has a 96-99 DSM, he/she has a NON-EPROM ECU and cannot run DSMLink or a chip until they buy an E-PROM ECU.

2G some 95 E-PROM ECUs are OBDI
2G some 95 NON-EPROM ECUs AND 96-99 ECUs are OBDII

OBDI (pre '96 cars)

OBDI is not a standard. While most people refer to cars that aren't OBDII as OBDI, there were no specifications set forth as "OBDI". Cars not manufactured to OBDII spec were not required to adhere to any rules as far as the design of ECU communications. Each manufacturer was free to create there own way to 'talk' to the ECU.

OBDII

The US government mandated that all cars manufactured for and after the 96 model year be OBDII compliant. Some manufactures picked up OBDII compliance as early as 94, but typically 95 or 96. If your car is 96 or later, it's OBDII compliant.

Source - www.pocketlogger.com

 

[silvermitsu10]

Im using ecu+ on a nearly stick motor... well in comparison to yours anyway. and on stock boost levels with stock injectors I'm making about 235 at the front wheels. It's a good system that is easy to use and the tech support is pretty good on their web site as well.I think that it gets a little harder to controll the injectors on anything bigger than 780 cc's but if I'm not mistaken you can still tune with bigger... you just have to be a little more conservative. You also get full timing controll, a knock voltage reading, and with that wideband you will get a/f readings, as well as many other things. All that you need is a laptop to tune with and a friend that is willing to help run the laptop so you can do a few datalogging pulls. Check out their website at www.ecuplus.com and join the board to ask more detailed questions if you'r interested. The guy who makes them will personally answer any question you have usually within one day from my expierence. I would suggest it to anyone who isn't already running DSMLink.

 

[my98gsx]

I looked into the ECU+ and it looks great. It would solve my problem with having to take out my stock ECU. Someone said that running a DSMlink does not require an ECU swap but in a 1996-1999 DSM it does. You need to put in an EPROM and thats my problem. The Ecuplus.com talks about this and said that it would not have a problem with NYS inspection stations. - Is anyone else running this system on thier car? - If so do you like it?

 

[xxraptor660xx]

Not to be a total noob, but I've never been to a dyno..Is that thing in your exhaust tip how they measure A/F ratio?

 

[Artago]

Not to be a total noob, but I've never been to a dyno..Is that thing in your exhaust tip how they measure A/F ratio?

I don't know about the dyno but that's how they measure A/F ratio when doing emissions control.

 

[Locke]

Not to be a total noob, but I've never been to a dyno..Is that thing in your exhaust tip how they measure A/F ratio?

I don't know about the dyno but that's how they measure A/F ratio when doing emissions control.

Yes, they tend to call it a wideband on a stick.

 

[JessGST]

For 1Gs, yes, NOT for 2Gs. On a 2G, you need to have a E-PROM ECU which was only available on 95s. This means that if a 2G owner has a 96-99 DSM, he/she has a NON-EPROM ECU and cannot run DSMLink or a chip until they buy an E-PROM ECU.

2G some 95 E-PROM ECUs are OBDI
2G some 95 NON-EPROM ECUs AND 96-99 ECUs are OBDII

This is incorrect. All 2G's (95-99) are OBDII. OBDII was not mandated until 96, but Mitsubishi switched over a year earlier. Meaning, you can put any 95 Eprom ECU into any year 2G and still maintain your OBDII port. The only thing that you would need to change is your firing order.


As far as tuning, I shoot for low 11's at WOT on pump and into the 12's on C16.

 

[DGajre777]

This is incorrect. All 2G's (95-99) are OBDII. OBDII was not mandated until 96, but Mitsubishi switched over a year earlier. Meaning, you can put any 95 Eprom ECU into any year 2G and still maintain your OBDII port. The only thing that you would need to change is your firing order.

"What is OBD?
What is OBD-I?
What is OBDII?

OBD is an acronym for "On Board Diagnostics". OBD-I was version 1, OBD-II is version 2.

It is an industry-standard method of communicating with the onboard engine computer. It was created so that ECUs from different manufacturers would have a standardized communication protocol instead of several different proprietary versions.

Sometimes pre-OBD cars (such as 1G DSMs) are referred to as OBD-I cars. This is not accurate, since they use the ALDL interface. 1995 cars might be OBD-I rather than OBD-II, but since most OBD tools support both I and II the difference is usually not important.

There are actually three different possible interfaces within the OBD-II standard: PMW, ISO, and PMZ. [So much for standardization....] All 2G DSM's use the ISO version of the interface, so any diagnostic equipment used must also support the ISO version of OBD-II."

www.vfaq.com

If you know something that I don't, please share...

 

[mnetwork]

I always thought 95's were OBDII

 

[TunaTalon]

I always thought 95's were OBDII

1995's were pretty much OBDII complient but there was a bug.
The MIL bug in the 95 ECU shows that the CEL is on even with no error code.

The current code from Keydiver has a fix on the MIL bug.
See item 17 on http://www.dsmchips.com/2g.html.

Jeff burned a new chip for me with the bug fix for $20.00.
In the car repair world that's pretty much like free.