35th camaro

i am looking for info on the stock maf ls1 2002 camaro, what is the max hertz could i see on my hp tuner, how do i kno if it is maxing out, and also what rwhp limite have you seen from the stock unit, i have a strocker 402 with aprox 500 rwhp

ddnspider

iTrader: (26)

98 cars go to 11,250Hz, later years go to a full 12,000Hz I think. Max airflow is somethink like 67-67Lb/min of airflow. Go log your car and see if you reach that number, if not you havent maxxed the MAF. Stock MAF will go higher than 500hp.

35th camaro

i have seen 10600 hertz at around 6600 rpm, but engine will spin easy to 7000, havent tried yet because a/f wasn't right.

ddnspider

iTrader: (26)

Yea, you're not maxxing it yet. Log lb/min from the MAF too and that'll give you an idea. Somepeople use that to ballpark engine HP. I max my MAF at ~4500rpms

35th camaro

i have a 104 lide, 102 fast intake and 102 trottle body, the stock maf won't hurt my hp until i max it out???, tell you why i have the stock maf now before you ask. i have been trying to get ride of some bucking with the 100 mm maf i had and i could not. my e-mail tuner told me to try my stock maf to see, and almost no bucking to speak of. just that my but-dyno tells me i have lost a bit.

ddnspider

iTrader: (26)

stock MAF definitely sounds like the restriction in your intake track, but I don't know the rest of your setup. I havent seen much of a before/after comparison from swapping MAF's only. I would say if you already have the bigger maf, and the rest of the setup is big like the 102 stuff you posted, then I would focus on working out the bucking.

ddnspider

iTrader: (26)

PS, I've seen people try this if they want to see if they have an intake restriction. Log your MAP and make a pull in the car. If you do not stay at ~105kPa, then you have an intake restriction because youre not using all of the available air in the atmosphere.

35th camaro

that is why i want to kno the max that the stock can take, not saying that it is a restriction but i do want to find out, have been trying to tune the large maf with 2 tuners, it was the ideal of the 3rd to try a diferent maf to see if the bucking would go, this is all by e-mail tuning

35th camaro

will try the map logging tomorrow

35th camaro

check one of my logs and at 6170rpm i was at 96kpa, check before i started the car and was 101kpa. at one point on a acceleration log it was at 101 then started to drop down to 96 as rpm went up.

ddnspider

iTrader: (26)

You should be seeing 100+ for most of the run with your intake setup. I know you said you had bucking with the 100MM MAF, but is it okay under WOT? I'd be curious if you swapped that on and made another pull, if you'd suddenly see it stay at 100+. Of course this assumes the tune is acceptable for the new MAF at WOT.

Edit...I should clarify. Are you just a bolt-on car or do you have heads/cam too?

35th camaro

i do have a log with the 100maf, and i seen were it is at 98-99kpa at wide open trottle at 6400rpm.

ddnspider

iTrader: (26)

Are you a heads cam car? It sounds like the MAF was a slight restriction but youre still not using all the available air in the atmosphere.

35th camaro

have patriot stage 3 heads, pacesettre long tube and off road y into a 4'' exauste, cam is 236-242 at .050 and 650 lift

ddnspider

iTrader: (26)

Are you using HPT or EFI Live?

35th camaro

Hp tuner

ddnspider

iTrader: (26)

Ah, I use EFI Live. Otherwise, I would have looked at your logs. You just need to try and gauge from the logs if it appears like a significant restriction. I would think you're probably okay, but it sounded like with the stock MAF you were at 96kPa and then it went down, whereas the 100mm stayed around 98-99.

35th camaro

it is exacly that, is that much of a restriction3-4kpa

ddnspider

iTrader: (26)

Im not experienced enough to say yes or no, someone else would have to chime in. I would log airflow from the MAF in lb/min and compare the 2. If you're flowing serveral lb/min of airflow more, than youre making a good amount of power from changing to the 100mm.