Danielbuilt Racing
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Home of DBR starters
FAQ - Starters & Alt.


Why are cables and  battery so important?

The starter circuit pulls a lot of amperage, up to 500 amps depending on the starter, the engine load, and battery condition. This kind of amperage stresses all of the components in the starter circuit, including the battery, battery terminals, the battery disconnect switch, the cables including the ground path, and any remote solenoids. Problems with these components are hard to find because they appear fine at rest or under a light load, but generate high resistance under heavy amperage draws. The result will be low voltage to starter during cranking, resulting in heavier amperage draw and increased internal heat in the starter. Over time, this will cause starter failure. Voltage measured at the starter during cranking should always be above 9.5VDC.

Why does the starter cut the tips off the starter pinion after a while?

If the starter pinion is being damaged in this way, the gear meash is too sloppy. The pinion needs to be closer to the gear. If there are no shims installed, then material needs to be machined off of the mounting surface of the starter. Optionally, shim the outside starter mounting bolt only. This will roll the starter toward the gear, tightening its engagement.

Why choose a DBR starter?

We have raced many years, and have had a lot of problems with starters. Over the years we have found a way to correct those problems and now can offer a quality starter at a low price and stand behind it.

Will water damage my starter?

Yes, the most common problem see is water damage from  pressure washing. Our starters are sealed,but high pressure  water will blow by the seals and corrode internal parts. Instead of pressure washing, wash the starter with a garden hose.


How do I hook up a one wire alternator?

Simply run a charge wire from the battery terminal on the alternator to the positive terminal on the battery. The one wire regulator is a self-exciting regulator, meaning that it has sensing circuitry for alternator rotation. As the alternator starts to spin, this circuitry connects the internal voltage regulator to the battery and turns the alternator on.When the alternator comes to a complete stop, this same circuitry turns the alternator off.


I noticed that my DBR one wire alternator has to be revved up to get the alternator to come on . Why?

A one wire alternator has a turn on point. This is the speed where the internal sense circuitry connects the battery to the voltage regulator, thereby turning the alternator on. The speed typically is 1200 engine RPM's.

How do I determine what pulley to use?

Generally, the alternator should be 1:1 with the motor for circle track racing. For drag racing, the alternator should be overdriven by a ratio of 1.75:1 or more. This will allow charging on the return slip and in staging. For street use, we recommend 3:1.

Can I use a switch to turn off my alternator?

One wire alternators should NOT be switched off, or isolated from the battery. This causes severe internal spikes in the alternator, which could cause damage. We do not recommend switching alternators on/ off while the engine is running.
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