Installed Piston Oil Squirters in the new 421" SBC

[DeltaT]

In prep for some serious power (target is 1200fwhp with the Vortech YSi, ~20 pounds of boost on E85) and also planning ahead in case I every decide to go to twin turbos or a big single, I recently finished installing piston oil squirters using a kit from Bo Laws Performance. The kit comes with 2 separate fixtures, one for cylinders 1-7 and the other for #8. It also comes with the necessary bits, taps and jets. Here's some pictures:

Here's one of the fixtures attached to a main, with the hole already drilled and the bit in the hole:


https://static1.pt-content.com/images/pt/2011/05/new421_pistonoilerfixtureinplace_mini-1.jpg

This one shows the drilled hole with the bit in it for clarity:


https://static1.pt-content.com/images/pt/2011/05/pistonoilspray001_mini-1.jpg

Then you mark the block between the oil squirter holes and the main oiling holes with a Sharpie, showing where you are going to use a cutting wheel to make a shallow connecting trench for the oil feed:


https://static1.pt-content.com/images/pt/2011/05/pistonoilspray014_mini-1.jpg

Here's one trench after cutting:


https://static1.pt-content.com/images/pt/2011/05/pistonoilspraycyl1cut_mini-1.jpg

The drilltap, tap and 8 jets that come with the kit:


https://static1.pt-content.com/images/noimg.gif

And a shot of one bank in the Dart Little M block after everything's done:


https://static1.pt-content.com/images/pt/2011/05/pistonoilsquirters008cropped-1.jpg

I installed these for extra insurance against detonation and piston pin galling. I did install a Melling oil pump rated at 10% greater volume than stock. The BLP kit above is supposed to cost you a couple psi and a modest amount of oil volume if installed on a motor with correct clearances.

Now I can start the final build.

Jim

[NOT A TA]

Nice post Jim. Thanks for taking the time to share. Does Bo Laws recommend the pump with the added volume?

[DeltaT]

Thanks. When I spoke to Mike Laws, he thought it was a good idea but thought the 30% greater volume pump would be a waste of power. The guys on Speedtalk.com have also recommended the +10% volume Melling with the large pickup for the Darts.

Jim