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 Home > Technical Support

Q&A
Q1. What is piston pin?
A piston pin is a machined high strength steel "tube" that goes thru the piston and connecting rod and holds them together.
Q2. Are your pistons and pins forged?
Yes all TORCH pistons and pins are forged for maximum strength and durability.

Q3. What is TORCH Professional?
TORCH Professional is the latest addition to the TORCH product line. These high performance piston kits include many advanced features while maintaining a price similar to the existing TORCH Piston line when purchased with rings. New features include lightweight TORCH forgings, accumulator grooves and high quality long wrist pins. In addition, the TORCH Professional line features an industry first 1.2mm, 1.5mm, 3.0mm ring package. The 1.2mm carbon steel nitrided top ring is extremely durable and offers reduced friction over 1.5mm and 1/16" top rings. A 1.5mm Napier (hooked face) 2nd ring is used to improve oil control over conventional taper-faced rings. The combination of these new features can reduce the piston assembly weight up to 77 grams when compared to traditional pistons. Weight savings can be even greater when compared to other forged piston brands.

Q4. How much ring end gap should I run?
The required ring end gap varies for each application. A spec sheet is included with piston and ring orders to help you determine the proper ring end gap. If you have misplaced your spec sheet and have questions, please contact our customer center..

Q5. How do I know my piston to wall clearance, and where do I get the measurement?
All Piston kits include a piston spec sheet with a piston to wall clearance recommendation. Always measure Pistons at the recommended gauge point, usually .500" up from the bottom of the skirt or where otherwise indicated on the spec sheet. Subtract this dimension from your finished bore size to determine your piston-to-wall clearance. If you have questions, please contact our customer center.
Q6. What material does TORCH use to make the piston Pins?
TORCH uses high quality steel in all of its piston pins.

Q7. I have a set of a competitor's piston sets. Can TORCH rework them?
No. We will not do any reworking to any piston other than supplying to OE customers.


Q8. I have a set of a competitor's pistons, and I just need 2 more. Can TROCH make them?
No. We will not manufacture replacement pistons to match other brands on lots of less than a full set.

Q9. What kind of ring end gap should I run?
If you would like specific gap recommendations for your application, please contact our customer center for more information.
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