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Put LTO on stock electric.
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<blockquote data-quote="Nikolai Cvetkov" data-source="post: 8875528" data-attributes="member: 690797"><p>Yes the main battery is at engine side (the car is Mercedes w124) ... Originally it comes with 90A alt and 70/80Ah batt .. ive upgraded with 180A alt and 100Ah lead acid battery ... Upgraded the wire from alt to the battery and the ground of the battery is 40cm (near the shock absorber ) ... Currently the amp is grounded under back seats with m10 bolt ... I wasnt sure if the RCA are bad ... So I changed them with stage 3 rca which are expensive .. the parasite noise from engine disapeared but now I hear only few accessories... Otherwise if the car is just on idle with volume UP all the way I dont hear any noise juat when use emergency lights or left/right signals ... Ive pushed 2 x 6mm2 wires for the headunit one for positive and one for ground ... i tried to touch the rca plugs with wire and ground to chasy or HU body but nothing happens ... Could it be possible that my power to the amp is way too long while the ground is lot shorter ... I though on wire both negative terminals on both batteries (when I add second one) and leave the current one from the amp to the chassis as additional ground like you said ... So Ill try to put ground loop I hope it help with such noise ... My HU is not very modified for bass cuz it has 2v output on rca .. while I left my HU to 47 out of 62 cuz of clipped signal and there I get 1.59v ... Could it be possible because of such low voltage on rca to cause noise cuz to match the gain my amp is like on 60/65% up ... Ive read some amps dont work well with high gain ... But thats the point where it match with HUs voltage to put out 3kw ... I use Pioneer MVH s520BT and Deaf Bonce 2900.1D amp</p><p>Forgot to say : Power wire is going through passenger while RCA are going to the trunk nearby the drivers side ... Ive red about the induction so the power wires and rca wires are separated .</p><p></p><p>That LifePo4 looks good ... Its smaller compared to normal lead Acid battery ... I think of re-work the wires and put the amp and the second batt under the back seats which will decrease the lenght of the power wire but the signal wires to the woofer should be longer not sure how that affects the damping since most class D amps nowadays dont have damping control (its probably automatic ) ...my wires to the sub is 4mm2 again OFC</p><p></p><p>Last question .. does that LifePo4 batt need boost on voltage cuz I have 14.4/5 ~ only on first engine atart where the main battery is cold .. in 2/3 minutes it drop to 14.2/1 v ... Will this be enough to charge both ?</p></blockquote><p></p>
[QUOTE="Nikolai Cvetkov, post: 8875528, member: 690797"] Yes the main battery is at engine side (the car is Mercedes w124) ... Originally it comes with 90A alt and 70/80Ah batt .. ive upgraded with 180A alt and 100Ah lead acid battery ... Upgraded the wire from alt to the battery and the ground of the battery is 40cm (near the shock absorber ) ... Currently the amp is grounded under back seats with m10 bolt ... I wasnt sure if the RCA are bad ... So I changed them with stage 3 rca which are expensive .. the parasite noise from engine disapeared but now I hear only few accessories... Otherwise if the car is just on idle with volume UP all the way I dont hear any noise juat when use emergency lights or left/right signals ... Ive pushed 2 x 6mm2 wires for the headunit one for positive and one for ground ... i tried to touch the rca plugs with wire and ground to chasy or HU body but nothing happens ... Could it be possible that my power to the amp is way too long while the ground is lot shorter ... I though on wire both negative terminals on both batteries (when I add second one) and leave the current one from the amp to the chassis as additional ground like you said ... So Ill try to put ground loop I hope it help with such noise ... My HU is not very modified for bass cuz it has 2v output on rca .. while I left my HU to 47 out of 62 cuz of clipped signal and there I get 1.59v ... Could it be possible because of such low voltage on rca to cause noise cuz to match the gain my amp is like on 60/65% up ... Ive read some amps dont work well with high gain ... But thats the point where it match with HUs voltage to put out 3kw ... I use Pioneer MVH s520BT and Deaf Bonce 2900.1D amp Forgot to say : Power wire is going through passenger while RCA are going to the trunk nearby the drivers side ... Ive red about the induction so the power wires and rca wires are separated . That LifePo4 looks good ... Its smaller compared to normal lead Acid battery ... I think of re-work the wires and put the amp and the second batt under the back seats which will decrease the lenght of the power wire but the signal wires to the woofer should be longer not sure how that affects the damping since most class D amps nowadays dont have damping control (its probably automatic ) ...my wires to the sub is 4mm2 again OFC Last question .. does that LifePo4 batt need boost on voltage cuz I have 14.4/5 ~ only on first engine atart where the main battery is cold .. in 2/3 minutes it drop to 14.2/1 v ... Will this be enough to charge both ? [/QUOTE]
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