Harley Shovelhead, 80 cu in, 3.503 bore, 4.250 stroke, 9.5:1
Make
Harley Davidson
Engine Size
80 CI
Model
Shovel Head
Bore (in)
3.503
Stroke (in)
4.25
Comp Ratio
9.5:1
Dome CC
45
Comp Height
1.3
Piston Part Number
M5048
Conrod Part Nmber
N/A
Pint Part Number
791-2500-14CP1C
Locks Part Number
787x050 SWL
Rings
RS1227-3505-0
Shelf (RPO) or Made to Order (MTO)
MTO
Proudly made in the USA by CP Carrillo Pistons!
Fully CNC machined
Balanced to +/- 1 gram
Double forced pin oilers
Forged from high strength 2618 alloy
Designed for maximum performance, horsepower and reliability
Complete kit includes two pistons, ring sets, wrist pins and clips
Follow ring end gap and piston to cylinder clearances as per the supplied instructions
More Information
Product Name
Harley Shovelhead, 80 cu in, 3.503 bore, 4.250 stroke, 9.5:1
Brands
CP Carrillo
Delivery & Freight
We are an Australian-based company that ships items nationally and internationally, usually within 48 hours of receiving your order. High-value items shipped internationally are sent via DHL Express, while lower-value items are sent via Australia Post Express unless otherwise instructed.
You can calculate shipping rates inside the shopping cart. After adding all the products you would like, navigate to the cart and click the ESTIMATE SHIPPING & TAX link. .
If you only see the Click and Collect shipping option, it means that your address was not validated correctly.
If you have issues calculating freight, please get in touch. We are happy to help.
Disclaimer:
Product images are for description purposes only. Actual product may vary.
What information do I need to match these pistons to my engine?
You need the engine code, bore size, stroke, rod length, pin diameter and target compression ratio. These determine the correct piston compression height and crown design.
How should ring gaps be set for these pistons?
Ring gaps must be set by your engine builder based on fuel type, boost level and the intended rpm range. Forced-induction engines usually require larger gaps.
Are forged pistons suitable for street engines?
Yes. Forged pistons handle detonation and high cylinder pressure better than cast units. Your builder should set the piston-to-bore clearance to suit your application.
What is the recommended bore clearance for the M5048 pistons?
The M5048 pistons are designed for a 3.503 inch bore. It is crucial to set the bore clearance according to the specific application and the engine builder's preferences. A typical clearance range for performance applications is around 0.0020 to 0.0040 inches, but always confirm with your engine specifications.
What type of ring end gap should I use with the M5048 pistons?
For the M5048 pistons, follow the manufacturer's instructions for setting the ring end gaps. Generally, performance applications may require wider gaps than stock specifications to accommodate thermal expansion, especially if running higher RPMs or boost.
What is the compression height of the M5048 pistons and how does it affect my setup?
The M5048 pistons have a compression height of 1.3 inches. This measurement is critical for achieving the desired compression ratio in your engine. Ensure that the combination of piston, cylinder head, and gasket thickness aligns with your target compression ratio of 9.5:1.
Do I need to modify the cylinder heads when using M5048 pistons?
Depending on the specific setup and desired performance, you may need to modify the cylinder heads to achieve optimal combustion chamber shape and volume. It's essential to check for clearance and compatibility with the piston dome design.
What materials are the M5048 pistons made from and what are the benefits?
The M5048 pistons are forged from high strength 2618 alloy, which offers excellent durability and resistance to thermal expansion. This material is ideal for performance applications where high temperatures and pressures are common, providing reliability and strength under demanding conditions.
