Pepmeier Engine Development

Ever wonder why the LT5 power curve is shaped like it is? The factory manifold length from plenum runner entry to valve seat is...

Build 2 is underway. The block is currently being freshened at the machine shop. As a bit of history, this engine was initially built...

So, the components are back from the machinist and I've started to prepare things for assembly. Today, the bores were checked for...

Been a few weeks since I last posted about this build. An impromptu vacation and a couple of customer calibrations to finish came first....

In this installment, the bottom end rotating assembly is assembled. To start, I again relentlessly wipe the bores down to make sure they...

Not much to report lately. I have paused the engine assembly while I get the top end ready for installation. As it stands, the short...

This installment will detail the set-up and assembly of the cylinder heads, including valves and valve springs. One of the most...

You guys are probably wondering where I've gone. No posts since September on this project. Had to spend some time doing other things in...

As I said in a previous blog post, we had trouble getting enough fuel to the first 427 build at 700 chp. I believe the fuel system was...

Getting closer to the first fire! Cams timed. 109/111 centers. A degree allowance for wear/chain stretch. Using the new high strength...

Got the new engine started today. A registry member came by to experience it with me, which was cool. Prior to today, I filled her up,...

Wow. More than two years since the last blog post. Sorry about that. Finally have the 427 series 2 wired and running on the test stand....

Here are a couple of older presentations I gave at the ZR-1 Gatherings.