The J2000 is Now Known as Slow Racecar

"That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms" (thatbastardkurtis5) 01/25/2020 at 20:25 • Filed to: None

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I had some time today, so I did a little work on what I’m now officially calling Slow Racecar, since that’s what my 4 year old calls it and it’s honestly an accurate description of the J2000. If it makes 140hp when it’s all done it’ll be a miracle, and it’ll be slow regardless.

A couple of weeks ago I got the engine block back from being machined. They took .025 off it to get through the fire rings and some damage that was there...it came out great so it was time to proceed to reassembly.

The damage that was machined out.

I had honed the cylinder bores, they cleaned up great, so when my new bearings arrived I cleaned everything up and stuffed the crankshaft in. I had a little time left to work, so I installed the new rings on the #4 piston and installed that too.

Tomorrow I’ll have time to get the other three pistons in there, then I have to check my piston-to-head clearance. I don’t think .025 is going to be a big difference, but I do have a .020 copper shim gasket I could use if I really needed to...I’d rather have the compression, so hopefully I don’t need it.

Last thing tomorrow might just be a morale booster, not that I need it. I think I may bring the head and carbs to the garage and mock it all up to see how the finished engine will look. Oh I’m also going to prep the oil pan and block for paint; I didn’t come this far to only come this far, so I’m absolutely painting the block and making it look nice before it goes back in the car.

shop-teacher > That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms 01/25/2020 at 21:42

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Good stuff!

MM54 > That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms 01/25/2020 at 21:53

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Nice work!

What was the compression ratio before? T aking 25 off the block will bring it up a bit

That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms > MM54 01/25/2020 at 22:05

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Either 8:1 or 9.2:1, I can’t get a straight answer on it. I’ll need to pick up a shop manual or find a data sheet somewhere. 

MM54 > That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms 01/25/2020 at 22:17

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Either way you’ll still be well within pump gas territory with the block decked

sony1492 > That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms 01/25/2020 at 22:25

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You could go a ways further on pump 91, at least 10:1

That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms > MM54 01/25/2020 at 23:09

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Yeah definitely, even if its 9.2:1 I don’t think I’m bumping it higher than 10, which is a compression ratio these engines carried in other versions. Of course I’ve also got the flat top pistons which were adding some too. Eh, honestly as long as it runs I barely even care how much power it makes.

That Bastard Kurtis - An Attempt to Standardize My Username Across Platforms > sony1492 01/25/2020 at 23:11

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I might take a whack at doing a really rough calculation of it tomorrow. Between milling the deck and the flat top pistons I’m sure I picked up something, but I’ll run 93 in it regardless.