Ford 428ci TFS 11R 4.125 Bore 1.295 CH -29.2cc (CP Bullets BF6172-STD)
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|
Make |
Ford |
|
Engine Type |
Small Block |
|
Part Number |
BF6172-STD |
|
Bore (in) |
4.125 |
|
Stroke (in) |
4 |
|
Rod Length (in) |
6.2 |
|
Comp Height |
1.295 |
|
Head Type |
TFS 11R |
|
Head CC |
52.4 |
|
Dome / Dish Height |
-0.195 |
|
Dom/Dish CC |
-29.2 |
|
Compression Ratio |
10.5 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.230 / SP |
|
Cubic Inch |
428 |
|
Piston Weight |
500 |
|
Style |
Dish |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
No |
| Product Name | Ford 428ci TFS 11R 4.125 Bore 1.295 CH -29.2cc (CP Bullets BF6172-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 BF6172-STD pistons?
For the BF6172-STD pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this may vary based on your specific engine build and intended use, so always consult with your engine builder for precise specifications.
What compression ratio can I expect with the BF6172-STD pistons?
The BF6172-STD pistons are designed to achieve a compression ratio of approximately 10.5:1 when used with TFS 11R heads with a 52.4cc chamber. Keep in mind that actual compression may vary depending on factors like head gasket thickness and combustion chamber modifications.
What type of ring set is compatible with the BF6172-STD pistons?
The BF6172-STD pistons come with a ring thickness of 1.5 x 1.5 x 3.0mm. Ensure you select a compatible ring set that matches these dimensions for optimal performance and sealing.
Do I need to machine the piston skirts for my application?
Depending on your specific engine block and bore, you may need to perform some machining on the piston skirts for proper clearance. It's advisable to check the fitment and make adjustments as necessary to avoid any binding or excessive clearance.
What is the weight of the BF6172-STD pistons, and how does it affect performance?
The BF6172-STD pistons weigh 500 grams each. While a lighter piston can improve engine response and reduce reciprocating mass, ensure that your connecting rods and crankshaft are rated to handle the weight and stress levels associated with your intended power output.
