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Thread: Project λ (Lambda) AKA Tech Van: 1994 Chevrolet G20 Conversion Van/56K WARNING!

  1. #101
    FLAC freeflashstuff's Avatar
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    Note: VR3 Amp DOES NOT have an internal limiter. It WILL output more than 200W and it WILL get EXTREMELY HOT!

    I smelled something funny in the van, and I went to where I have everything installed, and the amp was EXTREMELY HOT! I need to find a new amp that can handle two SVC 4-ohm subwoofers @ 500W RMS and 600W max each that won't go into protect the first time I hook it up. I really don't want to pay someone to install something I am perfectly capable of doing...
    I have bad luck with vehicles...

  2. #102
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    Speakers do not pull amps, they only have a maximum you can give to them.

    An amplifer that is rated at 200Wrms at 4ohms, will output 200Wrms (ignoring marketing crap) if you hook it to a 4ohm speaker, no matter what speaker it is. No speaker will pull more, unless it is say, a 2ohm speaker.

    An amplifier getting super hot can be one of several things. What is your gain set at? If you have it turned up (It's NOT a volume folks) then your amplifer may overheat. Also, if your speakers are a lower resistance than your amplifier is rated for, then it can also overheat.

    VR3's a crap amps, I've had two (bought both at walmart which should tell you something), so you likely have your gain turned up to compensate for the fact that they are much quieter than they should be for their power rating.


    So, what is your gain set at, and do you have the 4ohm speakers each hooked to its own channel, and are the channels rated for 4 ohms?
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  3. #103
    FLAC freeflashstuff's Avatar
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    Quote Originally Posted by malcom2073 View Post
    VR3's a crap amps, I've had two (bought both at walmart which should tell you something), so you likely have your gain turned up to compensate for the fact that they are much quieter than they should be for their power rating.
    I know they are crap, but this one took two 8 inch SVC 500W Max subs wired @ 2 ohms at full blast. But, of course, I tuned it with a multimeter and a test tone... Plus, the only reason I'm using it is that my Kenwood amp(s) all instantly went into protect.

    Quote Originally Posted by malcom2073 View Post
    So, what is your gain set at, and do you have the 4ohm speakers each hooked to its own channel, and are the channels rated for 4 ohms?
    The gain is set to about half of the max, and I have the bass booster thing turned off. I have one SVC 4-ohm sub hooked up to it.
    I have bad luck with vehicles...

  4. #104
    FLAC freeflashstuff's Avatar
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    So... I was presented with an interesting problem earlier. The thought struck me during church (of all times). I just shelled out $150 about two months ago for a 165 amp alternator for the Turtle. It's getting stripped and prepped for sale, so I figured I'd pull the new alternator. It has less than 100 miles on it, and I haven't even had a chance to use it to its full potential. So, I got to thinking during church, "Can I put the Turtle's new/old alternator on the Van? In short, yes, but with a lot of rigging involved. I would also probably need a custom bracket for it. I have attached a PDF with what I have found.
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    I have bad luck with vehicles...

  5. #105
    Who am I? HiJackZX1's Avatar
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    Quote Originally Posted by freeflashstuff View Post
    The problem is time. Time is something I don't have much of what with school ending and my summer college classes coming up...
    Dont worry about time. Just take your time and do the project slow. I dont see what the hurry is. As long as you can dedicate about an hour to the car a day, you should be good. I work so much and have to take care of my dogs, that I dont even have that. I do have the whole day Monday though, so thats cool. Be lucky, Im sure you will finish it well within the 3 years its taking me to get everything in and working.
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  6. #106
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    Quote Originally Posted by freeflashstuff View Post
    So... I was presented with an interesting problem earlier. The thought struck me during church (of all times). I just shelled out $150 about two months ago for a 165 amp alternator for the Turtle. It's getting stripped and prepped for sale, so I figured I'd pull the new alternator. It has less than 100 miles on it, and I haven't even had a chance to use it to its full potential. So, I got to thinking during church, "Can I put the Turtle's new/old alternator on the Van? In short, yes, but with a lot of rigging involved. I would also probably need a custom bracket for it. I have attached a PDF with what I have found.
    WAITTTTTTTTTTTTTTTTTTTTTT. Alot of times SUV and Vans already have high output alternators. Mine currently puts out 135 amps, but because I have so much stuff that has to be powered, I have to go up to a even higher alt that can produce alot of amps while idle. I'm not a fan of having to rev my engine to get it to pump out what i need. I would first check to see what your alt in the van is putting out. Remember its a conversion van, made to have alot of speakers, TVs, and electronics. They may have already put a bigger alt to make sure there is enough to add the stuff they knew people in conversion vans would do.
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  7. #107
    FLAC freeflashstuff's Avatar
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    Quote Originally Posted by ZX1Cruizer View Post
    WAITTTTTTTTTTTTTTTTTTTTTT. Alot of times SUV and Vans already have high output alternators. Mine currently puts out 135 amps, but because I have so much stuff that has to be powered, I have to go up to a even higher alt that can produce alot of amps while idle. I'm not a fan of having to rev my engine to get it to pump out what i need. I would first check to see what your alt in the van is putting out. Remember its a conversion van, made to have alot of speakers, TVs, and electronics. They may have already put a bigger alt to make sure there is enough to add the stuff they knew people in conversion vans would do.
    What is on it is a 105A Alternator. The regulator is going out on it though, and I don't want fried electronics...
    I have bad luck with vehicles...

  8. #108
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    Quote Originally Posted by freeflashstuff View Post
    What is on it is a 105A Alternator. The regulator is going out on it though, and I don't want fried electronics...
    well if its dying, then go ahead. I will say that it is very hard to put an alternator from one car to another. You remember when i tried something similar and it was such a b!+ch I gave up. It looks easy, but it really isnt because you have to get the pulley to match up flawlessly, otherwise you have constant belt pop offs, or even worse, breakage.
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  9. #109
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    Agreed.
    I was delayed a few hours last weekend converting from a (Nissan) 2-wire Hitachi to a (Subaru) 3-wire Hitachi - both LR170 (only 70A).
    Yet I had already converted from a serpentine pulley to v-belt and the 1mm offset wasn't an issue. (For v-pulleys, I find +/-2mm not to be a major problem.)
    Both had 81mm inter-mount spacings.

    The hardware problem - a smaller outer-diameter eyelet for the heavy B connection.

    The biggest problem - worrying why they were using THICK cable for their Sense wire. Thick as in equal to the thinner of the 2 wires off the B connection - ie, capable of carrying 30A. But for a circuit that should take mA if not uA??!!

    Good old webland informed me that this sense wire was "powered" off the rotor, or had high current because.....
    As usual - it was all crap. I measured a few uA at one stage - but nothing ever approaching even LED currents, let alone 1000 times more than a LED as suggested by the wire gauge. (I even found contradictory connector wirings, but my (fail)safe connection regime proved successful.)

    As to alternators with different brackets & offsets - go to a wreckers instead.

    And if different wiring is used - forget it - especially those that find it difficult to connect the charge lamp circuit for use as an isolation switch.

    And unless you have a good reasons for an external regulator (like... ??), then use internal regulators. 3-wires types with Sense terminal are the most universal with least standby drain.

  10. #110
    FLAC freeflashstuff's Avatar
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    The work I have pix for:





    I have made (slightly) more progress since then, but I have no pix. School finals are coming up and I haven't had much time to devote to this project. After this Thursday, I'll have more time to work on this.
    I have bad luck with vehicles...

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