[gtofreek]

We worked out a deal with CP pistons on some stroker pistons for the 350 block. Here's what we have planned:

These pistons will be made from the same 2618 material as the high end custom pistons are made from. T

Because of the small bore of 3.875", they will be made from the LS Chevy engine piston forgings. These are box forgings by nature and are very strong. Here are some features:

1. They will come in .030" and .060" oversize or 3.905" and 3.935".

2. They will have a .990" pin[BB Chevy] with a .150" thick wall by 2.25" long. This will be a stout pin. Even thicker .180" walled pins will be available.

3. They will have double pin oilers.

4. They will have an awesome ring package with them. 1.5 mm top, 1.5 mm second, and a 3 mm oil ring. The top ring will be a steel gas nitrite ring that will be good for N/A, nitrous, blower, or turbo applications. Second ring will be a Napier ring for the ultimate in oil control. No concern with the 3mm oil ring since it has the Napier second ring.

5. They will be a flat top design with 2 valve reliefs. A multitude of compression ratios can be made with the various Pontiac heads out there. Anywhere from 7:1-13:1 can be made.

6. They will have a CP groove on the top ring groove. This groove helps to evenly distribute the combustion pressures behind the ring when the piston rocks at TDC.

7. Very lightweight, yet very strong forging.

8. Will be built for a 6.8" long BB Chevy rod which is readily available. This will still allow for plenty of room for the rings so they are not too close to the top.

9. Made for a 4" stroke. Will make either 383 CID in .030" over, or 389 CID in .060" over.

10. Made from 2618 aluminum alloy for ultimate strength.

These will sell for somewhere around $675 per set with rings and pins. This is a smoking deal. If these were customs, they would be around $1100-$1200 with rings and pins. In order to get these made at this price, we need to order at least 5 sets at a time.

If anyone is interested in a set of these, contact me and let me know, and when we get 5 orders, we will get them made. They will be proprietary, so they won't be available directly from CP.

Small bore/long stroke engines make good street engines because the smaller bore is less likely to detonate than a big bore, making them better for pump gas while still maintaining a compression ratio that makes good power. The long stroke will make a great torque curve. Plus, the smaller engines are better suited for the factory iron heads, so good power can be made without the expense of aluminum heads. Iron heads are very restrictive on big engines and aluminum heads are much more necessary for them .

I will post a pic of one of CP's box forging for an LS Chevy engine. This will be a good representation of what these piston's underside will look like.

Feel free to cal either myself or Jeff at 520-294-5758 if you have any questions.