Chevy 359ci ASCS 4.040 Bore 1.250 CH 14cc Dome Vert Gas Ports - Lefts & Rights (CP Bullets BCRE1340-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block |
|
Part Number |
BCRE1340-040 |
|
Bore (in) |
4.04 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
6 |
|
Comp Height |
1.25 |
|
Head Type |
ASCS |
|
Head CC |
58 |
|
Dome / Dish Height |
0.5 |
|
Dom/Dish CC |
14.04 |
|
Compression Ratio |
14.1 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.0 x 1.0 x 2.0mm |
|
VR Depth |
-.335 / SP |
|
Cubic Inch |
359 |
|
Piston Weight |
474 |
|
Style |
Dome |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | Chevy 359ci ASCS 4.040 Bore 1.250 CH 14cc Dome Vert Gas Ports - Lefts & Rights (CP Bullets BCRE1340-040) |
|---|---|
| Brands | CP Carrillo |
| Engine | Chev |
| Make | GM |
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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 BCRE1340-040 pistons?
For the BCRE1340-040 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. However, this can vary based on your specific engine build and operating conditions, so always consult with your engine builder for the best fit.
What compression ratio can I expect with the BCRE1340-040 pistons?
The BCRE1340-040 pistons provide a compression ratio of approximately 14.1:1 when used with a 58cc head. Keep in mind that actual compression may vary based on head gasket thickness and other factors, so it's important to verify with your specific setup.
What type of fuel is recommended for use with these pistons?
Due to the high compression ratio of 14.1:1, the BCRE1340-040 pistons are best suited for high-octane fuel, such as 98 RON or race fuel, to prevent detonation and ensure optimal performance.
Do I need to modify my cylinder head for these pistons?
The BCRE1340-040 pistons feature valve reliefs, but you should verify that your cylinder head has adequate clearance for the valve reliefs and that the overall piston-to-valve clearance is sufficient for your specific camshaft profile.
What is the significance of the gas ports on the BCRE1340-040 pistons?
The gas ports on the BCRE1340-040 pistons help improve ring seal and reduce blow-by by allowing combustion gases to pressurise the ring pack. This feature is particularly beneficial in high-performance applications where maintaining optimal cylinder pressure is crucial.
