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I've measured my parasitic draw at 33ma. I keep a battery tender on it when not in use. Dave

Mine measures 37 ma. I keep a battery tender on it at all times when not being driven. A parasitic draw in the 30-60 ma range will bring a battery to the 80% state of charge within days. The battery plates sulfate at that point. The battery will lose capacity and ability to store a charge. You...

You want to measure the parasitic draw on the battery when it is resting. Mine is 37ma. If you don't have a meter I am sure there is a local member that could help out. These cars are power hogs compared to most other cars. The other problem that has now been introduced was jumping the car and...

Non-ethanol fuel is available with a little looking. Check out Pure-gas.org So far it looks like 7-9% improvement in fuel mileage. Dave

NSXtasy: That particular trip was from Seattle To Mountain Home, ID, on the way to SLC. The mileage was 32.x mpg. I had ~.75 gallon left. My all time high mileage was 33.59 over a several hundred mile trip. The numbers are impressive considering the car is an automatic. One of the big keys to...

^ absolutely correct. Thank you. Dave

The NSX seats are the most comfortable seats I have ever sat in. I have driven Seattle To Salt Lake City with only one stop four times. Longest leg was 545 miles in one sitting with no back complaints. I have a two-level fusion at L4-L5, L5-S1. Dave

For another reference I have a 37ma parasitic draw on mine. Dave

If there is a load on the alternator disconnecting the battery will spike the alternator. It can go up to about 60 volts for an instant. The diodes in the rectifier are probably 20 volt diodes. You will blow out a diode. There is a feedback loop in the alternator/regulator that identifies the...

I drove the NSX to Salt Lake this summer. On the way down a good place to stay is the La Quinta at exit 29 in Idaho. You miss the Boise mess. Dave

By dressing the sliprings I mean to take some emery cloth and holding it on the sliprings as you rotate the rotor. Finish off with 2000 grit. The brush assembly comes complete like yours. If you look carefully at both sides of the brush holder one side is flat and the other had a small step in...

I rebuild these alternators for the Acura Legend forum members. I have the pieces you need if you can't find them locally. I would suggest you use Denso bearings. Make sure you dress the slip-rings. You will need a three-jaw puller to get the rear bearing off. Dave

I am very happy with the Battery Tender Plus I recently bought. In the constant voltage stage it holds 14.6 volts in a cool Seattle climate. It will drop down to a safe float mode after the battery is completely charged. Dave

I have a 150 with an inop autopilot and an ADF. Dave

It's normal to see a small spark when you hook up the battery cable. You are charging a cap and energizing some systems temporarily. After a few seconds the system draw should go down to the normal ~35ma parasitic draw. You could easily measure the draw with a multimeter. The trick is to have...

My NSX and my Legend both have a 37ma parasitic draw. Compared to other vehicles this is very high. The battery will be below the 80% state of charge within 7-10 days. This allows the battery to sulfate its plates. If this process goes on long enough the battery will not accept a deep enough...

The next thing I would do is load test the battery. Find someone with a Sun VAT-40. Your 14 volts resting is good but that is only surface charge. You could also measure battery voltage while cranking. Make sure it stays above 10.2 during cranking. Does the car start after the first start...

Hrant: Do you have a current clamp adapter for your meter that you can measure starter draw? It would be fun to know the starter draw. The number should be ~120 amps. If you have had low cranking voltage in the past there may be a short in the armature in the starter. That would be a...

Hrant: my 91 has a 37ma parasitic draw. I keep the battery out during the winter and a smart charger on it during the driving season. You can hook up an amp meter and simply start pulling fuses to see where the draw is. Dave

Sure would like the VIN on that car. Dave

911 with a cracked block due to 100% water. Around here 911 engines are air cooled. Did I miss something? Dave

First five "mod's" I did to the car. 1. Remove window tint; 2. new style water pump; 3. install original 91 style wheels; 4. clean injectors; 5. remove front license plate. Dave

Kyle: Your mileage numbers are now, especially impressive since you had the AC running. The manual gearbox may provide you with a small margin over the automatic as far as fuel economy is concerned. The cruise range is impressive though. I agree with your observations except for the last one. I...

KyleMo: Do you have a manual gearbox? Mine is the auto. I'm real happy with the mileage during relaxed cruising, which is all I really do. Having a cruise range of just over 500 miles gives plenty of options for routes. Dave

I would try two things. First I would confirm your voltage readings with a good meter like a Fluke. If you actually are charging at 16.3 volts that speaks to the regulator being bad. A bad diode in the rectifier bridge will cause low voltage. The regulator is the only component capable of having...