bluefish

There seems to be a lot of talk about all the obd11 gauges and a lot of questions.
Maybe I can explain and hopefully help people that may be new or are un decided.
obd11 gauges are fantastic for someone who has a stock car and just wants to see what is going on with engine management etc.They are also good for someone that has control of the stock ecu ie power axel dealers.
For someone that decides to tune their car ie rrm or cmd ,it becomes obsolete because they are fooler tunes and the ecu will not see the actual numbers because of map clamps etc.
So to summerize ,stock car not looking to tune obd11 great choice.
Looking to tune and see the actual numbers pick direct line gauges

 

CrookedH

So to summarize, you're incorrect on just about all of it. Nice try though.

It's OBD2 or OBDII not OBD11.

Scan gauges can be useful for anyone, tuned, not tune, etc... Most scan gauges can show instant MPG, exhaust/cat temps, 0-60 times, 02 volts, clear stored codes, show coolant, intake and ambient temp, a whole bunch more that can be useful to anyone.

The only value clamped is MAP/TIP on CMD, all other values show up correctly. MAP/TIP will show correctly up to whatever clamp value you have set. IE you'll show real boost until Xpsi that CMD says not to let the ECU see. Clamp it at 17, run the 16psi tune and call it a day. I was able to hit 17.5 on mine without the ECU throwing a fit...

How do you even know what if anything is clamped on RRMs? They haven't said if they clamp the values of anything.

It's not like if you throw CMD or RRM on the car all of a sudden your coolant gauge isn't going to work, 02 volts will be off, throttle % will be off, need I go on?

dennis_david

If you're using a CMD, most or all intercepted sensors and actuators will read false values because you will modify a signal going out or coming into the factory ECU to control it. Actual injection, TPS, MAP, engine ignition timing, will surely be wrong once modified.

bluefish

Wow im sorry you had a bad day, I was just trying to point out that for a stock car obd11 readings are great, but for guys that take it to the next levels,you might want to think about direct line gauges(for tuning purposes)
I should never have used the word clamp I should have stuck with fooling the ecu, would that be a better term.
One post and you ripped me a new one,Tks for the warm welcome

CrookedH

Correct, you would lose duty cycle readings. But which of the previously listed values would be affected?? I didn't say no values would be affected, don't read extra stuff in that's not there. Also, as mentioned, any value that was clamped, you wouldn't see above that. So far CMD doesn't alter timing or throttle postion in any way though, so those two would still be correct with CMD. I don't think they've mentioned anything about adding any throttle control in the future either.

With RRM the same as above would be true, except perhaps MAP, since we don't know if it clamps. Timing would also be read incorrectly using a scangauge with RRM, i think. I also would hope, and assume, that RRM isn't messing with throttle settings, no need.

It doesn't make a scan gauge useless with CMD or RRM.

My day was great actually. Your first post on the forum, instead of being "Hey guys new to the site....", was a post making minimal sense with incorrect information. I corrected that information. If you take offense to having misinformation corrected and not getting a big hug, then my apologies. WELCOME TO THE SITE!

bluefish

Okay I will bite,what info was incorrect.

CrookedH

Did you not read my posts? Or do you just not understand them?

You say its obd11, well it's not. It's obd2 or obdII. Shows you most likely don't know what it even stands for or what it's purpose is if you're calling the second/third generation of onboard diagnostics the eleventh generation.

You then go on to say a scan gauge is useless to people using RRM and CMD because they clamp values. RRM may or may not, we don't know, so that again, was misinformation. CMD does, but just losing PSI above X and a couple duty cycle readings doesn't make a device worthless due to it's dozens of other correct informational readings.

Perhaps something like:

FYI, if you have a scan gauge and use a tuning device that clamps or skews values, some of the info might not be displayed correctly.

That gets your point across without FUD and misinformation.

briansol

OMG I want obd3.14576445645345347567576453

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CrookedH

No way man, obd1337 is best!

bluefish

You are right I dont know much, my upgraded td04 19t with a clamped wheel would prove I know nothing .I only came on here to maybe give a little insight or direction on where to go.
tks, Last post I dont need the drama

briansol

win!

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N2OInferno

obd OVER NINE THOUSAAAAAAAAAAND!

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Pure Adrenaline

Dude, if you are going to post something on a specific topic, make sure you have good knowledge of it. There is always somebody who knows more and better than you.

Next thing you know, somebody will chime in and ask you for details on your TD04 19T setup, then proceed to school you on that, too.

It's the internet. Everybody is an expert. You thought you would teach somebody something and got schooled by somebody else. Deal with it.

CoupeDeVille

Does anyone have any insight what gauges would work best with my flux capacitor?

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Jennifer

Something in the Giggawattz range. Maybe obdgiggawattz?

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mmrp81

Mmmmm. Pie!

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AKGC

Lol. Wow. flamer fest lol

Well. anyway... clamped wheel?!?! You can't clamp a compressor wheel... Well you can but then the turbo wouldn't work lol o_O.

Clamping refers to making the ECU see a false reading, intentionally. Be it using a diode to "clamp" a pressure value from the MAP sensors, or from a module (CMD). A reflash would just reprogram the ECU.

BTW a 19T wheel on the turbo, without any type of tuning won't really do anything, besides just hitting peak boost lower in the RPMs. Might cause some boost spikes, if you light it up, but then, you would throw an engine code.


Your understanding of the OBD2 system is confused.
OBD stands for "On Board Diagnostics," and is primarily used to diagnose issues. Tuners just utilize the "reprogramming" feature that the factory/service department uses, to reflash the ECU. The reason why there is a "2" at the end, is because the auto makers standardized the whole OBD system, and its the second major revision.

If you are getting the values directly from the ECU, from the diag port using a OBD scanner or a gauge that connects through that port (something like an infometer, from my understanding), and have any of the sensors "clamped" (defined clamping earlier ), those readings will be false, thus useless above a certain value.

AKGC

hahahaha. I think I'm that person lol

hardmack

quish quish

Red Raspberry

Scan gauges showing the ECU output readings through OBDII are only the commanded values and not necessarily what is happening in reality, no matter whether stock, PA flashed or the pass through hardware.

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