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Brand: Powermaster
175A Powermaster 851574-1 Alt Denso Black 6 Grv HPR 1-Wire
Powermaster 851574-1 is a 175A 6 Grv HPR 1-Wire alternator.
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175A Powermaster 851574-1 Alt Denso Black 6 Grv HPR 1-Wire
Most people are familiar with the alternator rating as the amperage rating.
Alternators are referred to as a 65 amp or 100 amp alternator.
When replacing the alternator on the family car, this information is likely all that is necessary.
However, when building a custom car from the ground up, a deeper understanding of the power curve of an alternator is required.
A custom pulley or so-called 'power pulley' set is usually used with a performance alternator.
A mismatched pulley ratio and alternator can cause issues, especially at idle speeds where alternator performance is critical.
Understanding the alternator's capability at slow speeds is important to avoid this.
An alternator's output depends on speed, but this can be misleading because the output is not linear.
Instead, it follows a curve.
Each alternator has a unique curve, and at idle, small changes in the alternator's speed can significantly affect its output capacity.
Because of this, pulley ratios are very important, especially when using high amperage alternators.
The pulleys supplied with the alternator are matched to the winding and power curve.
It is crucial that any dress-up pulley sets do not deviate from this ratio.
Typically, a street-driven car should have a pulley ratio of at least 3:1.
If the vehicle has an automatic transmission with a low idle and spends a lot of time cruising, then a higher pulley ratio - perhaps 3.5:1 - should be used.
Alternators can handle high speeds up to 20,000 RPMs for short periods, so overdriving the unit is not an issue.
The output of high amp alternators can drop off significantly under 2400 rotor RPMs.
Therefore, Powermaster does not recommend power pulleys with high amp alternators.
Powermaster employs a state-of-the-art computer alternator dyno to measure the performance of each alternator manufactured.
Output curves, engine idle speeds, and alternator pulley ratios are carefully considered to ensure good drivability at idle and slow cruising speeds.
Key Features
Specifications
- Length
- 9.0 lb
- Width
- 7.5 lb
- Height
- 7.5 lb
- Weight
- 13.7 lb
- ASIN
- B09D8S4T17
- UPC
- 692209026266
- Ships From
- United States
- Brand
- Powermaster
Frequently Asked Questions
About 175A Powermaster 851574-1 Alt Denso Black 6 Grv HPR 1-Wire
01 What is the amperage rating of the Powermaster alternator?
The Powermaster alternator has a 175A amperage rating.
02 What type of pulley does the Powermaster alternator use?
The Powermaster alternator uses a 6 Grv HPR 1-Wire pulley.
03 What is the model number of the Powermaster alternator?
The model number of the Powermaster alternator is 851574-1.
04 What is the ASIN for this product?
The ASIN for this product is B09D8S4T17.
05 What is the UPC / barcode for this product?
The UPC/barcode for this product is 692209026266.
06 Where does this ship from?
Orders ship from our fulfillment center in Dover, Delaware, USA.
07 How many days will it take to arrive?
Orders ship within 1-2 business days and typically arrive within 4-5 business days via free standard shipping -- usually by Aug 30.
08 Does this product accept returns?
Yes -- this item can be returned within 15 days of delivery for a free return by mail. See our return policy for full details.
Special Offer
175A Powermaster 851574-1 Alt Denso Black 6 Grv HPR 1-Wire
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$380.69
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