Buick Grand National 3.8 L 231 3.82 Bore 3.4 Stroke 5.96 Rod 1.835 CH (CP Pistons ZR231)
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|
Make |
Buick |
|
Engine Type |
Grand National 3.8 L |
|
Part Number |
ZR231 |
|
Bore (in) |
3.82 |
|
Stroke (in) |
3.4 |
|
Rod Length (in) |
5.96 |
|
Comp Height |
1.835 |
|
Dome / Dish Height |
-0.22 |
|
Dom/Dish CC |
-27.2 |
|
Pin |
.940 x 2.750 |
|
Ring Thickness |
1/16 x 1/16 x 3/16 in. |
|
VR Depth Int/Exh |
N/A |
|
Piston Weight |
494 |
|
Gas Port |
No |
|
Capacity |
231 |
|
Shlef (RPO) or Made to Order (MTO) |
MTO |
Suitable for nitrous oxide system; Suitable for Supercharged or Turbo; Accumulator groove included; Double pin oilers, force fed from oil ring; Generous valve relief depths allow for high-lift cams and oversized valves; Balanced to +/- 1 gram; Pick lock for easy removal; Fully CNC machined. Notes: B – Supplied with Double Spiral Locks
| Product Name | Buick Grand National 3.8 L 231 3.82 Bore 3.4 Stroke 5.96 Rod 1.835 CH (CP Pistons ZR231) |
|---|---|
| Brands | CP Carrillo |
| Engine | Buick V6 |
| Make | Buick |
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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 ZR231 pistons?
For the ZR231 pistons, a typical bore clearance of 0.0025" to 0.0030" is recommended. However, final clearance should be determined by the engine builder based on specific application and tolerances.
Can the ZR231 pistons handle forced induction?
Yes, the ZR231 pistons are designed to be suitable for use with supercharged or turbocharged applications. Ensure proper tuning and fuel quality to maintain reliability under boost.
What is the weight of the ZR231 pistons and how does it affect performance?
The ZR231 pistons weigh 494 grams. Lighter pistons can improve engine response and reduce rotating mass, but it's important to balance them with the rest of the rotating assembly for optimal performance.
What type of locks are supplied with the ZR231 pistons?
The ZR231 pistons come supplied with double spiral locks, which help secure the wrist pin in place and ensure reliable operation under high-stress conditions.
What machining considerations should I keep in mind for the ZR231 pistons?
When installing the ZR231 pistons, ensure that the cylinder bores are properly honed to match the piston dimensions. Additionally, check ring gaps and adjust as necessary to accommodate the intended operating conditions.
