Small Block Chevy 23° N20 4.165 bore, 4.00 stroke 6.00 rod, 1.00 ch 11.2cc dome 14.9 cr, 043,043, 3mm rings - Lefts & Rights (CP Bullets BCRE1520-040)
SB Chev 305 Sprint Car 3.786 bore, 3.500 Stoke, 5.700 Rod, 1.550 CH,Vert Gas Ports Flat Top 9:7 CR 1mm,1mm, 2mm rings - Lefts & Rights (CP Bullets BCRE2031-050)
SB Chev 305 Sprint Car 3.776 bore, 3.500 Stoke, 5.700 Rod, 1.550 CH, Vert Gas Ports Flat Top 9:7 CR 1mm,1mm, 2mm rings - Lefts & Rights (CP Bullets BCRE2031-040)
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|
Make |
Chevrolet |
|
Engine Type |
Small Block Bullet Special 305 Race Saver Series |
|
Part Number |
BCRE2031-040 |
|
Bore (in) |
3.776 |
|
Stroke (in) |
3.5 |
|
Rod Length (in) |
5.7 |
|
Comp Height |
1.55 |
|
Head Type |
Brodix Spec Race Saver |
|
Head CC |
62 |
|
Dome / Dish Height |
FT |
|
Dom/Dish CC |
-1.4 |
|
Compression Ratio |
9.7 |
|
Pin |
.927 x 2.250 |
|
Ring Thickness |
1.0 x 1.0 x 2.0mm |
|
VR Depth |
-.180 / SP |
|
Cubic Inch |
314 |
|
Piston Weight |
413 |
|
Style |
FT |
|
Valve Reliefs |
2 VR's |
|
Gas Port |
Yes |
| Product Name | SB Chev 305 Sprint Car 3.776 bore, 3.500 Stoke, 5.700 Rod, 1.550 CH, Vert Gas Ports Flat Top 9:7 CR 1mm,1mm, 2mm rings - Lefts & Rights (CP Bullets BCRE2031-040) |
|---|---|
| Brands | CP Carrillo |
| Engine | SB Chevrolet / Holden |
| Make | GM |
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 clearance for the BCRE2031-040 pistons?
For the BCRE2031-040 pistons, a typical bore clearance of 0.0030" to 0.0035" is recommended. This ensures proper thermal expansion and avoids piston seizure during operation.
What are the implications of using gas ports on these pistons?
The gas ports on the BCRE2031-040 pistons enhance ring seal and improve performance by allowing combustion gases to pressurise the ring pack. This can lead to better power output but requires careful tuning and monitoring to prevent ring wear.
What compression ratio can I expect with the BCRE2031-040 pistons and Brodix Spec Race Saver heads?
Using the BCRE2031-040 pistons with 62cc Brodix Spec Race Saver heads will yield a compression ratio of approximately 9.7:1. Ensure that the entire engine assembly is balanced and tuned for optimal performance.
What is the weight of the BCRE2031-040 pistons and how does it affect engine performance?
The BCRE2031-040 pistons weigh 413 grams. Lighter pistons can improve engine response and reduce reciprocating mass, but ensure that your engine is built to handle the specific RPM and power levels you intend to achieve.
Are there specific machining requirements for the BCRE2031-040 pistons?
Yes, the BCRE2031-040 pistons may require careful attention to ring gap settings and bore preparation. Ensure that the cylinder bores are honed to the correct specifications and that the ring gaps are set according to your intended use and RPM range.
