Ford 427ci 4.125 Bore 1.195 CH 12.5:1 (CP Bullets BF6151-STD)
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|
Make |
Ford |
|
Engine Type |
Small Block |
|
Part Number |
BF6151-STD |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.195 |
|
Head Type |
CHI 3V KAASE |
|
Head CC |
50 |
|
Dome / Dish Height |
-0.064 |
|
Dom/Dish CC |
-14.4 |
|
Compression Ratio |
12.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.280 / -.100 |
|
Cubic Inch |
428 |
|
Piston Weight |
496 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Ford 427ci 4.125 Bore 1.195 CH 12.5:1 (CP Bullets BF6151-STD) |
|---|---|
| Brands | CP Carrillo |
| Engine | Ford V8 |
| Make | Ford |
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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 BF6151-STD pistons?
The recommended bore clearance for the BF6151-STD pistons is typically around 0.0030" to 0.0035". However, this can vary based on your specific engine build and operating conditions, so it's best to consult with your engine builder for precise specifications.
What compression ratio can I expect with the BF6151-STD pistons?
The BF6151-STD pistons are designed to achieve a compression ratio of 12.5:1 when used with a compatible cylinder head, such as the CHI 3V KAASE with a 50cc chamber. Ensure that your entire engine setup is compatible to achieve this ratio reliably.
What type of ring set is compatible with the BF6151-STD pistons?
The BF6151-STD pistons come with a ring thickness of 1.5 x 1.5 x 3.0mm. It's crucial to use a compatible ring set that matches these dimensions for optimal performance and sealing.
What is the weight of the BF6151-STD pistons and how does it affect performance?
The BF6151-STD pistons weigh 496 grams each. This weight can influence the overall balance of your rotating assembly and may affect engine response. It's important to consider this weight in conjunction with your crankshaft and conrod setup for optimal performance.
Are there any specific machining requirements for the BF6151-STD pistons?
Yes, the BF6151-STD pistons may require specific machining for proper fitment, including honing the cylinder bores for correct clearance. Additionally, ensure that the piston pin bores are checked for alignment and fitment to prevent any issues during operation.
