Intake System Tuned Length
Ever wonder why the LT5 power curve is shaped like it is? The factory manifold length from plenum runner entry to valve seat is...
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Pepmeier Engine Development
Specializing in 1990 - 1995 Chevrolet LT5 engines
Todd Pepmeier
May 93 min read
2016 427 Build pt1
Build 2 is underway. The block is currently being freshened at the machine shop. As a bit of history, this engine was initially built...
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Todd Pepmeier
May 91 min read
2016 427 Build pt2
So, the components are back from the machinist and I've started to prepare things for assembly. Today, the bores were checked for...
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Todd Pepmeier
May 93 min read
2016 427 Build pt3
Been a few weeks since I last posted about this build. An impromptu vacation and a couple of customer calibrations to finish came first....
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Todd Pepmeier
May 92 min read
2016 427 Build pt4
In this installment, the bottom end rotating assembly is assembled. To start, I again relentlessly wipe the bores down to make sure they...
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Todd Pepmeier
May 92 min read
2016 427 Build pt5
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...
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Todd Pepmeier
May 92 min read
2016 427 Build pt5
This installment will detail the set-up and assembly of the cylinder heads, including valves and valve springs. One of the most...
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Todd Pepmeier
May 92 min read
2016 427 Build pt6
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...
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Todd Pepmeier
May 91 min read
Upgraded Fuel Delivery System
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...
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Todd Pepmeier
May 91 min read
2016 427 Build pt7
Getting closer to the first fire! Cams timed. 109/111 centers. A degree allowance for wear/chain stretch. Using the new high strength...
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Todd Pepmeier
May 92 min read
2016 427 Build pt8
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,...
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Todd Pepmeier
May 92 min read
2016 427 Build pt9
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....
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Todd Pepmeier
May 91 min read
ZR-1 Gathering Presentations
Here are a couple of older presentations I gave at the ZR-1 Gatherings.
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