Fred's 2375 Rebuild Thread Options

[friethmiller]

[A softball question for the Ninja and/or others]

This is the cam card that came with my 2357 engine, which was originally built by Rimco/Fat (long block) a few years ago. Can someone explain why with an intake/exhaust of 448, the lift was only set to 327 degrees? I'm about to rebuild my motor and a lot of focus will be directed at piston "deck clearance" and the valve train geometry that wasn't set correctly. Thanks.

[technicalninja]

Intake and exhaust are fine, should support deep into the 150hp range.

Minimum of a 123 dist IMO.

Next info needed is deck height, verify stroke.

Assemble case with crank/rods only. main bolts only.
OVER grease all of the bearings. We WANT the crank to be hydraulicly centered.
Just past snug for tightness on rod bolts/mains. Say 10-15 lbs.
Pistons with either no rings or top compression ring only (more important on forged pistons, helps center piston in bore).

Clean registers, base of jugs and top. Install jugs. Come up with a way to bolt jugs down without the heads. Lightly snug jugs into case.

Check deck height and total stroke.

It is possible to intentionally place piston down the bore a bit by design. You can easily reduce compression ratio this way. You screw "power" however.

I HOPE your pistons are close to the top!

Make it easier to achieve 10/1.

I LIKE between 9.5 to 10 for this application.
This much displacement and compression ratio demand more duration and overlap than a 2055.
You will NEED a bigger cam!




I would mockup the engine and verify the above.

CC the cylinder heads (got tips on this too as well as checking the valve job).

Before I did ANYTHING else. I wouldn't even be looking at parts yet.


You are welcome to come up and I'll help you go through it.

I don't have the correct circle in plexi yet.

I can probably help via keyboard as well.


The DIY ceramic coating is EXACTLY like powder coating with one exception...

No funky ass electronic charging sprayer!

Coating does require the parts be clean. In many cases it's best to start with NEW parts as any oil seeped into the surface will degrade the coating.

If you clean it up medically clean, then cook it in the oven multiple times you can clean stuff up.

It makes an oven "not suitable for food" so sacrificial. An oven removed for a remodel will work fine. Most of the time you can find these cheap or free on Craigslist.