Small Block Ford Most 19° / 20° 4.155 bore, 4.000 stroke 6.200 rod 1.290 CH, +5.77cc Dome 1.2mm , 1.2mm, 3mm rings (CP Bullets BFR6166-030)
Small Block Ford N351 4.030 bore, 3.500 stroke, 5.700 or 6.200 rod or 3.850 stroke, 6.000 rod , 1.250 CH Flat top Lat. Gas ports, no VR's 1.2mm, 1.2mm, 3mm rings (CP Bullets BFR6059-030)
Small Block Ford Most 19° / 20° 4.155 bore, 4.100 stroke 6.200 rod 1.250 CH, +5.77cc Dome 1.2mm , 1.2mm, 3mm rings (CP Bullets BFR6163-030)
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|
Make |
Ford |
|
Engine Type |
Small Block |
|
Part Number |
BFR6163-030 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
4.1 |
|
Rod Length (in) |
6.2 |
|
Comp Height |
1.25 |
|
Head Type |
Most 19 / 20 deg |
|
Head CC |
62 |
|
Dome / Dish Height |
0.25 |
|
Dom/Dish CC |
5.77 |
|
Compression Ratio |
14.7 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
-.280 / SP |
|
Cubic Inch |
445 |
|
Piston Weight |
492 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Small Block Ford Most 19° / 20° 4.155 bore, 4.100 stroke 6.200 rod 1.250 CH, +5.77cc Dome 1.2mm , 1.2mm, 3mm rings (CP Bullets BFR6163-030) |
|---|---|
| Brands | CP Carrillo |
| Engine | Ford V8, Small Block Ford |
| Make | Ford |
Delivery & Freight
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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 BFR6163-030 pistons?
For the BFR6163-030 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, final clearance should be determined based on your specific engine build and operating conditions.
What is the compression ratio with the BFR6163-030 pistons and a 62cc head?
The BFR6163-030 pistons yield a compression ratio of approximately 14.7:1 when used with a 62cc combustion chamber. Ensure that your fuel quality and tuning are suitable for this high compression.
What type of rings are included with the BFR6163-030 pistons?
The BFR6163-030 pistons come with a ring set featuring 1.2mm top and second rings, along with a 3.0mm oil control ring. Ensure proper installation and gap settings for optimal performance.
What is the piston weight of the BFR6163-030 and how does it affect engine performance?
The BFR6163-030 pistons weigh 492 grams. While lighter pistons can improve throttle response and reduce reciprocating mass, consider balancing them with the full rotating assembly to maintain engine reliability.
What machining considerations should I keep in mind when using BFR6163-030 pistons?
When using BFR6163-030 pistons, ensure that the cylinder bore is properly honed to match the piston size and that the ring gaps are set according to your engine's specifications. Additionally, check for any necessary modifications to the cylinder head for valve clearance.
