Small Block Ford Flat Top -8.7cc All 20 deg. TFS Twisted 4.155 bore, 3.250 stroke, 5.400 rod 60cc head 9.9 to 1 comp (CP Bullets BF6120-030)
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|
Make |
Ford |
|
Engine Type |
Small Block |
|
Part Number |
BF6120-030 |
|
Bore (in) |
4.155 |
|
Stroke (in) |
3.25 |
|
Rod Length (in) |
5.4 |
|
Comp Height |
1.165 |
|
Head Type |
STD/ TFS Twisted |
|
Head CC |
60 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-8.7 |
|
Compression Ratio |
9.9 |
|
Pin |
.927 x 2.500 |
|
Ring Thickness |
1.5 x 1.5 x 3.0mm |
|
VR Depth |
-.280 / SP |
|
Cubic Inch |
353 |
|
Piston Weight |
472 |
|
Style |
FT |
|
Valve Reliefs |
3 VR's |
|
Gas Port |
No |
| Product Name | Small Block Ford Flat Top -8.7cc All 20 deg. TFS Twisted 4.155 bore, 3.250 stroke, 5.400 rod 60cc head 9.9 to 1 comp (CP Bullets BF6120-030) |
|---|---|
| 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 BF6120-030 pistons?
For the BF6120-030 pistons, a typical bore clearance of 0.0020" to 0.0025" is recommended. However, it's crucial to verify this with your specific engine setup and intended use, as clearances may vary based on factors like temperature and application.
What compression ratio can I expect with the BF6120-030 pistons in my Small Block Ford?
The BF6120-030 pistons provide a compression ratio of 9.9:1 when used with a 60cc head. Keep in mind that actual compression may vary based on factors such as head gasket thickness and combustion chamber modifications.
What type of ring gaps should I use for the BF6120-030 pistons?
For the BF6120-030 pistons, ring gaps should be set according to the manufacturer's recommendations and your specific application. A common starting point is 0.004" to 0.005" per inch of bore for the top ring, but always consult your engine builder for precise specifications.
Are there any specific machining requirements for the BF6120-030 pistons?
Yes, the BF6120-030 pistons may require specific machining such as honing of the cylinder bores to achieve the correct clearance. It's essential to ensure that the bores are within the specified tolerances for optimal performance and longevity.
What is the weight of the BF6120-030 pistons and how does it affect performance?
The BF6120-030 pistons weigh 472 grams. While piston weight can influence engine balance and performance, it's important to consider the entire rotating assembly's weight and balance to ensure smooth operation at high RPMs.
