Tear Down and Reassemble Unstarted 1.7 built to 2270, 1.7 to 2270 Unstarted 10 Year Old Build Options

[Robroe]

Moved from topic of first start of 10 year old build to tear down, inspect and reassemble. The 10 year old build is from a 73 1.7 to a 2270. Stroked to 78 mm and 96 mm cylinder diameter. Heads are Ham/RAT with 36 mm exhaust and 44 mm intake. Both are nicely ported.

Have torn it down to the case and checking crank end play before I split the case and pull the cam and crank. So far, everything is new and looks in good order. I'm concerned about oil passages being blocked with old assembly lube so a complete tear down and reassemble is happening. Discovered stacked cylinder spacers (4) totaling .150". So looking to replace those with single spacers. So far I can only find .160" spacers from type 4 store and may just use them as impact on compression appears minimal. Was shocked to discover crank end play is .450"! Sure glad I didn't try to start this thing. Will check again in the morning to make sure I'm checking it correctly, but I'm doing the same thing on the videos such as Ian Carrs YouTube engine builds so pretty sure I'm checking it correctly. Now to figure out what to do about that huge end play.

Any thoughts about what to watch out for?

[technicalninja]

I would NOT worry about determining shim selection on ANYTHING now.

Take measurements, write them down, and then forget about them...

With botched crank endplay ALL of the build is suspect.

I'd be worried about internal clearances at this time if I was in your shoes.

Important questions IMO are.

Has the valve train been upgraded?

I'd EXPECT skinny ass steel pushrods.

Fixed solid shimmed rocker arm assemblies.

Elephant feet valve adjusters.

Explanation on this junk can be found in Ian Karr's vids (which are GOOD!).

Internally I expect
Billet oil pump with O-rings on the OD.
Adjustable cam gear.
Reduced base circle camshaft with serious numbers.
The LN 9520 might be a good choice.

You might get by with the aftermarket rods/reduced base circle cam and NO internal clearance mods, but I would EXPECT evidence of clearance mods to one of the rods and maybe the case. 78mm is getting close enough to other shit that VERIFING stroker clearance is a requirement.

I'd bet that hasn't been done on this build...

I'm going to take second fiddle on this thread.
You have the Hawk looking over your shoulder and he is BAD ASSED!
If he gives bad advice, I WILL eviscerate him publicly as I expect him to return the favor if the roles are reversed...

Of all the posters here, I'd bet MORE MONEY that he is "more" correct than anyone else.

You have a KICK ASS mentor...

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