New Battery=More Boost???
11-04-2003, 11:41 AM
#1
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New Battery=More Boost???
My battery died on Sunday.. Monday rolls around and I jump start the TT go to the dealer and get a new battery installed. I had my car Revo'd in August and had the boost gauge installed early September. Max boost 21 psi and I would hold at 19 psi. One new battery later I am spiking at 25 and holding 21!!!! WTF is going on?? Is this possible. My car definitely feels quicker but I almost pulled over when I saw the boost gauge fly by 20psi.. It kind of freaked me out, but I like it
11-04-2003, 11:43 AM
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Actually you may not be....>>>>
one thing that you have to realize is that these cars adapt to a driving style. By disconnecting the battery, the ECU "relearns" your driving style...i have seen people pull their ECU's prior to a day at the track.....
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11-04-2003, 04:16 PM
#8
Bogus. Voltage is controlled by the alternator, not the battery.
Voltage output when the car is running averages some 13.5 to 14.5 volts, higher if the over-all demand is higher.
Current output from the alternator is way more than necessary to maintain proper voltage/current for the ECU and coil packs.
Also, the coil-packs are voltage-stabilized, and will work to proper output specs even if the input voltage changes.
Current output from the alternator is way more than necessary to maintain proper voltage/current for the ECU and coil packs.
Also, the coil-packs are voltage-stabilized, and will work to proper output specs even if the input voltage changes.
11-04-2003, 04:23 PM
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so your saying
that if input to the alternator is low, output remains consistent regardless of how low the battery is??? I dunno bout that...There have been alot of posting of those who have used more powerful batteries or who have had replacements and have noticed higher boost. THe current most be stronger at the coils after this change. What could be the other reason? Or do you speculate that it offsets parasitic drain allowing more to be routed towards ignition?
11-04-2003, 04:30 PM
#10
There is no "input" to the alternator, just output...
If the input to the *coil packs* varies, it will not effect the *output* to the plugs.
The battery is in your car to help *maintain* a constant *current* supply, not voltage.
A more powerful battery, I.E. more "cold cranking amps" will do nothing to help coil packs.
Coil-packs are voltage and current regulated, as are all the other electrical components in your car.
A change in "performance" is a placebo effect, coming from the fact that all electronics were reset to "0", agian, no memory effect from the ECU.
You can't change the Laws of Physics just by changing a battery.
The battery is in your car to help *maintain* a constant *current* supply, not voltage.
A more powerful battery, I.E. more "cold cranking amps" will do nothing to help coil packs.
Coil-packs are voltage and current regulated, as are all the other electrical components in your car.
A change in "performance" is a placebo effect, coming from the fact that all electronics were reset to "0", agian, no memory effect from the ECU.
You can't change the Laws of Physics just by changing a battery.