[RESOLVED] MAS honeycomb install

[mikeymuscles82]

i took the honeycomb out of my MAS and my idle was touchy. If i put the honey combs back in will my car idle normal???thanks!!! oh and i am missing one small corner part of the honeycomb will this affect my car???

 

[tkelly27]

Put it back in and see what happens. It would make sense that it would make your car idle better if it's what made your car idle poorly in the first place. If it doesn't fix it, there are two options, get a new MAS, or get a tuning package that can compensate for a hacked MAS.

 

[twicks69]

Pulling out the honey combs will cause the Mass Air Flow Sensor to recognize more air passing it, in your case, too much air; this will cause the ECU to add more fuel than neccessary in your case, causing it to have idle and low/high throttle issues.

Is your BOV recirculating or venting to the atmosphere?

Also, if you are going to be touching the MAF, you better have an AFC to retune for the increased airflow that the ECU is seeing from the MAF's signal.

Read your other thread you started about AFC's. Otherwise, here is the search link again.

Search Results - DSMtuners

http://www.dsmtuners.com/forums/newbie-forum/277754-what-afc.html

 

[mikeymuscles82]

my bov is venting...I KNOW... if i recirculate the bov will my car run and idle better??? thanks for you help.

 

[twicks69]

Yes, if you recirculate your bov, it WILL run better.

 

[Nvisabl]

Says who??

when you vent to atmosphere on a maf car that is draw thru. the fuel is calculated for that give amount of air. When you shift and vent your air/ fuels go pig rich like 8.0 /1 range because the air has been counted and you let it leave, this is why boost leaks are such an issue. If you go to blow thru you can have leaks all over the place car will run fine even if it doesn't make as much power. Venting on a blow thru system just lets the Turbo spin free on shifts. You lose on the order of .2 of a sec. in the first 1/8 alone venting with a draw thru system.

DJ

 

[mikeymuscles82]

i installed my honeycomb back into my MAS, but i am missing the small left corner of the honeycomb is this why my car is idoling low or could it be that i am venting my bov and not recirculating it??? Also my boost gauge when idoling is not at zero it stays up???

 

[bane3d]

Honeycomb:

What is a MAS honeycomb?
This refers to a thin, gold-colored grille material located at the front of the mass airflow sensor (MAS). Its raison d'etre is to 'straighten' out the incoming airflow into the MAS. This is a requirement of the Karmaan vortex airflow sensor used in the MAS. The upper portion of the honeycomb affects the measured air, while the lower portion affects bypass air - air that is not measured by the MAS.

Removing the lower portion of this honeycomb-like material can sometimes help delay fuel cut on 1G DSMs, by adding a few percent more unmetered air into the air/fuel mixture. Some owners, however, complain the mod makes their engine run rougher - the current theory is that the turbulet lower airflow somehow affects the non-turbulent upper airflow where the two flows meet.

Please note that under no circumstances can all of the honeycomb material be removed from the MAS. Doing this will screw up your idle huge, as the MAS airflow measurement gets all screwed up. Only the lower portion may be removed, and generally only on 1G cars.

2G owners often find out they can't remove any of the honeycomb material. Fortunately, since the 2G MAS flows a lot more air than the 1G MAS, the honeycombs should be considered far less of a concern.

See the FAQ Locator (look in the "Intake" section) and Jim McKenna's MAS modification page for more information. For those interested in the entire MAS sensor assembly, please read Mike Jackson's DSM MAF Theories Page.

Courtesy: 1000 Already Answered Questions - Index page

As for the bov venting, almost always they recommend recirculating unless you are running a GM Maft system. It can cause odd problems and is best to recirculate and see how well your car works then.

d

 

[95CarbonEclipse]

when you vent to atmosphere on a maf car that is draw thru. the fuel is calculated for that give amount of air. When you shift and vent your air/ fuels go pig rich like 8.0 /1 range because the air has been counted and you let it leave, this is why boost leaks are such an issue. If you go to blow thru you can have leaks all over the place car will run fine even if it doesn't make as much power. Venting on a blow thru system just lets the Turbo spin free on shifts. You lose on the order of .2 of a sec. in the first 1/8 alone venting with a draw thru system.

DJ

Agreed it'll make you run rich... but make your car run "considerably" slower (opposite of "considerably faster")???... I'd have to argue.

I guess my definition of the word 'considerably' is not nearly as loose as yours.

 

[Defiant]

Do not mess with the honeycombs, and do not vent. Consult any of the dozens of identical threads regarding this for details.