All Small Six Can you bore a 170 .060?

[Wyowanderer]

Engine came out of the van Saturday, and it's a reman engine - crank is .020/.020, and the block is 30 over and pretty worn- enough that it'll have to go 60 over.
Can a 170 go 60 over and be reliable for the street, or am I shopping for a block?

 

[drag-200stang]

As long as you are not boosting it and there is not excessive corrosion on the inside of the cylinders, you should be fine.

 

[Wyowanderer]

As long as you are not boosting it and there is not excessive corrosion on the inside of the cylinders, you should be fine.

That's encouraging. I'm likely to do some enhancements, but not very much.

 

[B RON CO]

Hi, I have a low mileage 170 engine in North Carolina. I swapped it for a 200 in my Bronco. Good luck

 

[powerband]

anecdotally - my '61 has a Granada 250 bored .070 over and has retained it's internal parts while taking it to the edge many times.
( ... uses AMC/IH 258 STD spec' Pistons)

... it does sound like shopping for a less worn project may be easier...

have fun

 

[bubba22349]

The very first 144 sixes could and were bored out to .120 over, however sometime after I think was in around 1964 or 65 Ford decided to start taking some of the metal out of their castings. X2 I also think you could go .060 over if you have to for normal street use without out any problems on that 1963 block it is done all the time even on the later 200 and 250 blocks.

 

[Wyowanderer]

Thanks!

 

[R_Calris]

I would recommend taking a look at the 'Ford Falcon Six Cylender Performance Handbook' as well. if you are going to bore the block that far, and have the engine fully disassembled to do so, then some durabuility upgrades may be in order so you can get the longest life out of that rebuilt six that you can. and while the head is off is the best time to do any cam changes you may want as the SB6 is pretty difficult to do cam changes with the head still on. its *possible*, but not easy, or recommended.

 

[Wyowanderer]

I'm changing directions on the van. I'm currently cleaning piston/rod assemblies and I've ordered a re-ring kit from Clegg.
I have a little block cleaning and honing to do, and I'll have a short block.
I've changed directions because I having a tough time finding a 200 semi - locally. I've found several, but no one wants to ship, and I'd prefer not to travel a thousand miles.

 

[R_Calris]

sorry to hear that, I love hearing these old "Buzzin' half Dozen" purring. the Toyota 1JZ H-beam conrods really help the durability of the engine, and if you shave 0.014" off of both sides of the journal face when you resize the crank journals, they are direct replacements if you ever have to rebuild again. couple that with a roller-tipped rocker assembly and ford 302 valve springs, and mounting up either the Holley 1946 carb with a Duraspark II ignition, or the sniper EFI throttle body, along side the digital distributor, the engine can really last a long time.

good luck with the project.