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)
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|
Make |
Ford |
|
Engine Type |
Small Block |
|
Part Number |
BFR6059-030 |
|
Bore (in) |
4.03 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.25 |
|
Head Type |
N351 |
|
Head CC |
60 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
0 |
|
Compression Ratio |
11.4 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.2 x 1.2 x 3.0mm |
|
VR Depth |
N/A |
|
Cubic Inch |
357 |
|
Piston Weight |
375 |
|
Style |
FT |
|
Valve Reliefs |
None |
|
Gas Port |
Yes |
| Product Name | 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) |
|---|---|
| Brands | CP Carrillo |
| Engine | 351ci Cleveland, 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 and stroke for the BFR6059-030 pistons?
The BFR6059-030 pistons are designed for a 4.030 inch bore and can be used with a 3.500 inch stroke. They are also compatible with a 3.850 inch stroke when using a 6.000 inch rod.
What compression ratio can I expect with these pistons?
These pistons provide a compression ratio of approximately 11.4:1 when used with N351 heads that have a 60cc chamber. Ensure that your engine's overall setup supports this compression for optimal performance.
What type of ring gaps should I set for the 1.2mm rings on these pistons?
For the 1.2mm x 1.2mm x 3.0mm ring set on the BFR6059-030 pistons, it is crucial to establish ring gaps based on your specific application, including boost levels and operating temperatures. Consult with your engine builder for precise specifications.
Are there any specific machining requirements for these pistons?
Yes, ensure that the cylinder bores are properly honed to match the 4.030 inch size and that the ring gaps are set according to your engine's specifications. Proper clearance and fitment are critical for performance and reliability.
Can I use these pistons with a different rod length?
The BFR6059-030 pistons are designed for use with either 5.700 inch or 6.200 inch rods. Using a different rod length may affect the compression ratio and overall engine dynamics, so ensure compatibility before proceeding.
