i was wondering what was the max amount of boost one could run on the stock map sensor without throwing a CEL (code 3, i believe). this is for a friend running hondata (no missing link or check valves) and wants to turn up the boost. i searched the archives and most people said anything between 9.5psi and 16psi. can someone please confirm the limits of the stock map sensor for us. thanks.

"You can run all the boost in the world you want to on it, but your fuel doesn't get any richer after the MAP's limit."

also, while searching, i read this. does this mean that when the ecu throw a code 3 CEL, that it does not go into limp mode? if this is true, then could he tune the last column richer and therefore run more boost?

for all those that can help, please do. thanks in advance.

 

11psi max

edit: with hondata

the 16psi you were reading was on the SMC

 

OBD0 .65 KG/cm2= 9.24 PSI
OBD1-2 .75 kg/cm2 = 10.66 PSI

 

did some more searching (non smc related) and found that it is somewhere between 11-12 psi depending on the car.

so what about the code 3 CEL? will it go into limp mode or not? thanks in advance!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ID_ten_T &raquo;</TD></TR><TR><TD CLASS="quote">did some more searching (non smc related) and found that it is somewhere between 11-12 psi depending on the car.</TD></TR></TABLE>

Quit paying attention to posts generated by ignorant ********* who just pass around incorrect information that they were told by their friend's roomie's brother's mechanic who really really knows something about Hondas. Pay attention to the exact, razor sharp figures just posted to this thread by someone who actually cared to MEASURE Honda MAP sensor range instead of BULLSHIT or PARROT INCORRECT INFORMATION.

I don't mean to fly off on you, bro. I just want you to know why you should take everything you read, even if it has a general consensus behind it, with a grain of salt. A lot of what you're told here isn't entirely true or isn't the entire story or is just flat out wrong.

 

thanks for the advice j.davis, i will keep that in mind in the future. i guess i missed that post when i was searching/replying. anyways, do you (or anyone else) have any comments on the CEL causing the ecu to run in limp mode (closed loop)? thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">

Quit paying attention to posts generated by ignorant ********* who just pass around incorrect information that they were told by their friend's roomie's brother's mechanic who really really knows something about Hondas. Pay attention to the exact, razor sharp figures just posted to this thread by someone who actually cared to MEASURE Honda MAP sensor range instead of BULLSHIT or PARROT INCORRECT INFORMATION.

I don't mean to fly off on you, bro. I just want you to know why you should take everything you read, even if it has a general consensus behind it, with a grain of salt. A lot of what you're told here isn't entirely true or isn't the entire story or is just flat out wrong.</TD></TR></TABLE>

well sorry for being a "********" by posting about my experience on my stock map sensor..

 

i've taken the stock map to a little over 11 psi with UberTeg's program with no codes. but then eventually it starts to crap out on me cutting off fuel and ****. also had it boost spike up to 16 psi without any CELs. but then again, my ecu didn't throw a cell when i had no oil either...POS ecu!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accordfreak &raquo;</TD></TR><TR><TD CLASS="quote">
well sorry for being a "********" by posting about my experience on my stock map sensor.. </TD></TR></TABLE>

You posted an ASSumption. At no time have you verified the limit of a stock Honda MAP sensor, so you didn't share anything valid. It isn't 11 psi.

I wasn't even thinking of you when I wrote that... people read 11.3 psi on Hondata's site and assume it is correct (sorry, it is not) but it is an excusable mistake. I was replying to people thinking they could get 11+ off a stock MAP sensor (SMC nonwithstanding) in all the archived posts. If you want to take what I wrote personally, though, don't let me stop you. Hate away...

 

I think boosteded9 ran 16 psi on a stock map without throwing a CEL.

 

Most problems occur not with the voltage MAP sends out but with the physical limitations of the diaphragm in the sensor itself. General believe on the maximum PSI MAP can work with is 11PSI, whether that is true or not is to the personal experience.
Stan

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">

You posted an ASSumption. At no time have you verified the limit of a stock Honda MAP sensor, so you didn't share anything valid. It isn't 11 psi.

I wasn't even thinking of you when I wrote that... people read 11.3 psi on Hondata's site and assume it is correct (sorry, it is not) but it is an excusable mistake. I was replying to people thinking they could get 11+ off a stock MAP sensor (SMC nonwithstanding) in all the archived posts. If you want to take what I wrote personally, though, don't let me stop you. Hate away...

</TD></TR></TABLE>

no i'm not hatin... just wanted to share what i experienced with my accord map sensor with the hondata.. i think i should have stated my specific setup instead of in general then... i was off so lets just leave it at that... have a

 

No, let's have two!

 

My friend's car has seen 16 psi, but we're both up here at ~6000ft elevation. Where did you hear that statement about being able to boost higher, but the fuel simply will not be increased? He blew his motor at 18 psi, but it was on the dyno and his a/f was reading around 14-16:1. We had concluded that it was probably due to the fact that he was using a stock crx fuel pump, but I'm starting to wonder if this may be part of the cause, if that statement is true. We are able to boost more on the stock map sensor (due to our elevation), but we don't know how much more.

 

J. Davis im comming for you and A-ville isn't that big...........

I probably know you maybe through Circuit City a long time ago but there aren't that many turbohonda's around the area.

 

Ahahhah.... sweet.

My car's hard to miss... POS white CRX, ghetto hood pins, I don't wash it, sounds like a semi truck. Definitely find me, I'd like to compare cars somewhere away from any volume of traffic.

The only guy I can remember from Circuit City was in the stereo dept... he was telling me his friend just bought a turbo B16 CRX from somewhere in TN. Never seen it though. The only turbo Hondas I know are me, Wes (HF/LS), Atlee (turbo ZC, don't laugh he pulls stock LS1), and Sam with the Piglude Maximus Bigus ******* Turbous.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">Ahahhah.... sweet.

My car's hard to miss... POS white CRX, ghetto hood pins, I don't wash it, sounds like a semi truck. Definitely find me, I'd like to compare cars somewhere away from any volume of traffic.

The only guy I can remember from Circuit City was in the stereo dept... he was telling me his friend just bought a turbo B16 CRX from somewhere in TN. Never seen it though. The only turbo Hondas I know are me, Wes (HF/LS), Atlee (turbo ZC, don't laugh he pulls stock LS1), and Sam with the Piglude Maximus Bigus ******* Turbous.</TD></TR></TABLE>

I worked in Car sterop and that was probably Lee you were refering too. Well i go to western. U need to hit me up on aim. Sampson619

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by servion &raquo;</TD></TR><TR><TD CLASS="quote">My friend's car has seen 16 psi, but we're both up here at ~6000ft elevation. Where did you hear that statement about being able to boost higher, but the fuel simply will not be increased? He blew his motor at 18 psi, but it was on the dyno and his a/f was reading around 14-16:1. We had concluded that it was probably due to the fact that he was using a stock crx fuel pump, but I'm starting to wonder if this may be part of the cause, if that statement is true. We are able to boost more on the stock map sensor (due to our elevation), but we don't know how much more.</TD></TR></TABLE>

Any thoughts?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by servion &raquo;</TD></TR><TR><TD CLASS="quote">

Any thoughts?</TD></TR></TABLE>

Well, the MAP sensor doesn't register any more pressure after 9.25 or 10.65 psi. It's pretty obvious why the guy's engine let go - if your fuel system is intended to use the MAP sensor then you have to use it in it's operational range or else you start going lean.

If you got desperate or impatient, I can see making your final fuel/timing values in the ECU program what they should be at whatever boost it is you want to run when that boost exceeds the stock MAP sensor's ability to register. But nobody's approaching it from that perspective. If you don't understand the risks, you are more likely to blow an engine.

 

I am at .8 bar now and have no codes, but the afc presure reading is lower than that like .5 bar. will the map make the car go to safe mode?

 

and we all wonder where uberteg got his fiery temper from...

stock map honestly has nothing to do with psi, it reads voltage which is generated from pressure, you can manipulate this voltage very easily, you could run 18 or 20 psi if you'd like, but generally without taking voltage out of the signal, it will be 11 psi

-ryan

 

What had us going is that we had the hondata boost cut enabled at 11 psi... and we never hit it (even at 18psi). Anyone else have this problem?