Basically before i start on the next build im wondering where the best place is to ground, im going to be using 4/0 wire from welding supply, and im just curious if the best place is under the car or if its in the car somwhere or what? what i want to do is run 1 wire of 4/0 to the front and 1 wire to the back of the car to a copper buss bar in the back where all my ground would be attached and also in the front where all ground would be attached. just need a good location.
also if i ran the wire under the vehical i would assume i would need some sort of a way to sheild it from the elements, being as i live in mn winters are quite rough somtimes with salt and all.
Thanks,
Anton Miller
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How many watts do you plan on running young Anton?
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
for right now its going to be 3500 watts, but after i get more monies it will be up in the 5000-6000 wrms but for this next build its going to be 3500 wrms. i figure you cant go wrong with doing your grounds properly.
no wire is too big right?
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Correct. But there does get to be a point in time where you're wasting money. I'd go from battery to battery, and make sure you have a good Big 3.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
4/0 seems a bit excessive
4/0 is the same as two 1/0 runs. I'll give you a hint Anton, I ran almost 5000 watt rms on a run of 1/0 no problem.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
only time more runs of wire would help would be if you were to burp with the vehicle off.
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sikcavy wrote:only time more runs of wire would help would be if you were to burp with the vehicle off.
well thats the plan, the only comps near me are db drag, it kind of sucks. due to the car having to be off, and ill be limited to 2 650 cubic inches batteries.
and i havent checked the prices but i think 4/0 would be cheaper than 2 runs of 1/0 wouldnt it? and there isnt a best spot to ground off? i would love it to be inside of the cabin area due to the problem of corrosion and all that fun stuff. basically i want the wire to be all done for what ever i try to do in the future, that way i dont have to redo anyof the wiring and just have to swap out equiptment and enclosures.
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Have you seen how big a run of 4/0 is, and how hard it is to flex? I had a hard enough time running a run of 3/0 and 1/0 thru the grommet. Don't ground off the body, go battery to battery.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
If you ground to body take a multimeter. Put one end to the pos power and set the DMM to ohms and measure the resistance at different spots. The lower the resistance the better.
Lanman31337 - Cavfire wrote:4/0 is the same as two 1/0 runs. I'll give you a hint Anton, I ran almost 5000 watt rms on a run of 1/0 no problem.
Actually two parallel 1/0 conductors (105600 Cmils * 2 = 211,200 Cmils) is a little smaller than one 4/0 conductor (211,600 Cmils).
I really dont think the slight difference would have much affect though.
Anton get into JBO chat.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
I agree. Or else I do the teabaggery
Lanman31337 - Cavfire wrote:Anton get into JBO chat.
im never on my computer long enough to chat, well not on one site long enough. so going from battery negative to battery negative, and ground the amp to the battery negative as well (battery in the back).
couldnt i drill a hole in the firewall for the 4/0 wire? but maybe doing 2 runs of 1/0 would be easier....
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Ground the amps to the rear battery, runs from rear batt(s) to front batt, big 3.
You could drill a 1 inch hole, sure. Make sure you use a grommet.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
Lanman31337 - Cavfire wrote:Ground the amps to the rear battery, runs from rear batt(s) to front batt, big 3.
You could drill a 1 inch hole, sure. Make sure you use a grommet.
yea i work for a rubber molding company, so a grommet wont be a problem. i may just do 1 more run of 2/0 since i allready have 1 run done, and i think i could fit another through our giant grommet. lol i remember the first time i saw my grommet on this car. i was like my god thats huge!! compared to other vehicals like my bravada and some volkswaggon before.
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Ladies see my grommet and say it's huge!
If you have a run of 1/0, you'll be good for some power.
Your car may do 13 sec @ 103 mph, but my car does 146db @ 35 hz.
well should i go bigger than 2/0 if im going to be running 7KW RMS? and if i step up to class street B ill be able to have 2 850 cu inch batteries. so thats more power right there. also whats a good alternator company that i wont have any problems with. the alt i have now just sucks and im going to ask for a refund or to fix it AGAIN. do not use motor city remanufacturing for an alt. they say it does 90 at idle and 200 at max, and i know thats bull because i get horrible voltage drops going down the road with only 1800 watts and one of the most efficient mono blocks ive seen. (80% at 1 ohm). my stock one did the voltage drop, but i dont think this bad.....
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Anton Miller (PPC) wrote:well should i go bigger than 2/0 if im going to be running 7KW RMS? and if i step up to class street B ill be able to have 2 850 cu inch batteries. so thats more power right there. also whats a good alternator company that i wont have any problems with. the alt i have now just sucks and im going to ask for a refund or to fix it AGAIN. do not use motor city remanufacturing for an alt. they say it does 90 at idle and 200 at max, and i know thats bull because i get horrible voltage drops going down the road with only 1800 watts and one of the most efficient mono blocks ive seen. (80% at 1 ohm). my stock one did the voltage drop, but i dont think this bad.....
unless the rules have changed for 2010, street B only allows 1 battery (850ci sounds about right, bigger than in A).
street C allows 2 batteries.
GAM (The Kilted One) wrote: if you think you're that much better than them because you're "correct" I hope your progeny don't turn out as screwed up as yourself.
Unholysavage wrote:Anton Miller (PPC) wrote:well should i go bigger than 2/0 if im going to be running 7KW RMS? and if i step up to class street B ill be able to have 2 850 cu inch batteries. so thats more power right there. also whats a good alternator company that i wont have any problems with. the alt i have now just sucks and im going to ask for a refund or to fix it AGAIN. do not use motor city remanufacturing for an alt. they say it does 90 at idle and 200 at max, and i know thats bull because i get horrible voltage drops going down the road with only 1800 watts and one of the most efficient mono blocks ive seen. (80% at 1 ohm). my stock one did the voltage drop, but i dont think this bad.....
unless the rules have changed for 2010, street B only allows 1 battery (850ci sounds about right, bigger than in A).
street C allows 2 batteries.
Yea one in the trunk, and one under the hood. 2 in total. i was told that anything in the rules only counts from the b pillars back.
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Nothing in front of the B pillars does count as long as its in the stock location I believe. SOmething of that sort
Edit: I know Im not as experienced as you Anton. But looky here:
Straight from SMD. I think youll be cool with one run of 2/0
2/0 gauge: ~440 amperes
Class D (~70% efficiency) - <4400 watts
Edited 1 time(s). Last edited Thursday, October 01, 2009 8:44 PM
TheSundownFire (JBOSB) wrote:Nothing in front of the B pillars does count as long as its in the stock location I believe. SOmething of that sort
^^^this^^^ go to section 6-8i im confused... maybe you only can have one battery???
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Now that I read that Im not sure. The rules are kinda vague. They do refer to the rear battery as the "second" battery. So Id say two including front.
the way i read that since they are discussing the rules for street a b and c is that when you get to rule 6-8i and it talks about batteries, it is talking about the secondary battery if you are competing in class c. so if you were planning on competing in class b i would assume you'd use the stock location or near it, of the oem battery and are limited to 800 cubic inch in size.
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