Stock class voltage allowed up to 15.5v

hey guys, i see i'm allowed up to 15.5v in stock 0-600. I looked at mechman's site at their GM voltage regulator harness, looks to me like just a short extension harness with a POT on one of the legs, if this is the case then there is no point in dropping a bill on a part i can find in my lab for free.
Also, are any of you guys in the 15.5v limited classes running over your stock voltage (14.5)? If so, are you running a dedicated alt to your amp only, or are you feeding 15-15.5v on the whole system? Most 12v batts are 6 cell and 2.1 V per cell, and most alternators charge between 13.8-14.4 volts, so it takes 2.3-2.4v per cell to charge, but would 2.6 volts be too much for a cell? I have not experimented with this yet nor tried it on any battery testing, just curious if any of you have yet. I would think that all factory components could handle 15.5v but it is stepping away from the vehicles stock voltage "safety zone" and is becoming risky. If a typical device runs off of 12v and now see's 15.5, thats almost 30% more voltage then whats its rated for, but will this really be noticeable seeing as how its already seeing 20% more from the alternator on a factory setup.

i run mine at 15.2 just to start out since i have a external regulator in my rex but keep it down daily i only turn it up for my run then keep it down to not mess stuff up but ive been told itis ok for most vehicles some wont like it and fucks Dung Pile upbut not sure what they are or why. a thing my teammates do to charge higher and not get a regulator is put a resistor in line on your alt to make it think it is charging low to increase your charging voltage.

well i'm taking into consideration that even though a lot of modern ECU's use old school technology, i do not know if mine has a voltage protection device or sensor that may shut my ecu off because it thinks my regulator has failed and voltage is spiking. Things like lighting should not be effected, but ecu and other digital electronics are another story.

my crx/s10/astro handled 15.5 no problem

most will take 16 before it starts having issues

sanman wrote:

my crx/s10/astro handled 15.5 no problem

most will take 16 before it starts having issues

was 15.5v daily or only during your spl run? I would run 14.5(stock voltage) daily, and 15.5 during my run, and there are some more contributing factors like voltage drop, etc. Also, how does a judge (if they even do) verify you are running the correct voltage for you class anyways? Just take your word for it?

sometimes dailey

multimeter at the amp terminals

sanman wrote:

sometimes dailey

multimeter at the amp terminals

^^ I'm a very observant person, and I've never seen a judge actually do this.

i have a 02 tahoe with a mechman alt and run 15.5 with no problems daily.

glad to hear this, you basically have the same vehicle as I do, as far as components and factory electronics are concerned. Have you had anything toast or fry at all? Ecu act funny?

^^ I'm a very observant person, and I've never seen a judge actually do this


thats because its to time consuming for them to do there damm jobs right

i garauntee you it will happen at finals


people please read what this man just wrote this maybe why you get ass raped in the lanes the jusdges should be checking your runs for proper battery voltage if not then atleast you should be watching your competitor to ensure this happens it might mean 1 or last place for you.

judges get your heads out your asses and do your dammm jobs that you are being paid to do

ok, obviously you see it at finals, how exactly is this done? At first i would assume a meter at the battery under the hood or alternator. The voltage has to be metered during the run instead of at idle before the run, I rev my motor to about 1k rpm's during my run to get my little bit of extra voltage- good for about .5 db on my setup due to voltage dropping out.
So what do they check? idle voltage?

they hook a multimeter up to your + and - on your amp and take voltage from there since thats where it reallly matters!

if they cant they do it somewherebut we arent sealed up like db drag not hard to hook up a multimeter and watch the #'s!

ok that was what i was getting at, i was thinking in terms of a sealed setup how they would achieve this. I guess they just need some really long leads, and run them in through the open door or just close the door on the leads along with the mic's rj45 cable.

i said that already i said the amp inputs not rca's i mean why would babbtery vltage be at the rca's lol

they do it the same way and sit the meter on the roof or hold it then monitor it through out the run like every other way of metering


psssstt they have like 25 foot multimeter leads

sanman wrote:

i said that already i said the amp inputs not rca's i mean why would babbtery vltage be at the rca's lol

i'm lost where you got RCA's from?

i said they hook up to the amplifier inputs to check voltage at the terminals


im confused what you didnt understand about that lol

the whole part about rca's..

never mind you are obviousely not getting my sarcastic humour at all

so here is the bottom line


thye wouldnt take dcv from the battery at any other point than the terminals on the amplifier due to being easily munipulated

at the terminals is the optimal location because that is the input voltage to the ampifier from the amp

no matter what kinda run you do leagl outlaw sb beat my meat etc etc etc if its in the lqanes this is the way it will happend period.

i understood that about the point of contact for the a/c voltage reading, just didn't pick up on your "funny".

I see everyone get voltage checked at regional events.

thats because even when being funny im a dick haha

sanman wrote:

thats because even when being funny im a dick haha

Hahahahaaa lololol.yep! ROTFLMFAO!

sanman wrote:

thats because even when being funny im a dick haha

sig worthy right there...

sanman wrote:

my crx/s10/astro handled 15.5 no problem

most will take 16 before it starts having issues

I run the XS Power 14 volt batteries with the alternator adjusted to 16.1 in the CRX. Other than eating alternator belts, everything runs fine.

Matt at Mechman has run his Mustang and Chevy truck at 16 volt for a few years.

yeah i knew the crx would handle 16+ just never tried the other 2 lol

sanman wrote:

thats because even when being funny im a dick haha

its all good, i just missed the execution of the joke because i was too busy watching you slaughter your English.. ha. I will say though i get a kick out of watching you JUMP ON PEOPLE's ASS though.. keeps it interesting..

english thats even a funny statement right thurrrrrrrrr boiiiiiiiiiii

you mean gutter trash english we all speak, and not the adopted queen's english right lol

sanman wrote:

babbtery vltage

ha, was talking more like this ^^