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You're so square
Baby I don't care

Just buy a die grinder and read Vizard's book, porting heads for fast road use is not rocket science.
I've done lots of smallbore heads over the years, but no more- my eyesight ain't what it was.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

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Have a Nice Day.
If already having a nice day please disregard.

I think you missed what I was getting at Kev.

I know they port out well, which is why I said what I said originally.


Need to buy a nice big compressor before I'll be doing any heads, that's for sure

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You're so square
Baby I don't care

Surface finish is pretty important when you're ready to start doing heads...





This is one I prepared this arvo ...


Adam, you don't need a big compressor to run a die grinder... my little 15cfm home compressor does fine... plus they're not dear

PK,
You will get arguments over what surface finish is needed on the head face- yours is one school of thought, the other is that a coarser finish holds the (non-solid) gasket better.

Back in the day (60s-70s), most block decks (and heads) were planed, for this reason. Later they were coarse milled.
But your Bling does look nice though!

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thank you kindly Kev

Yes, I've heard both sides... and I've even heard arguments that having a finish like this would cause air entrapment stopping proper gasket sealing...... all I can say to any of that is that if people were doing their head studs up in the right order and without hoeing them all the way down in one hit they wouldn't have problems... as far as biting the gasket goes.... This type of seal doesn't need bite to hold or seal... the heads are torqued down to at least 40ft/lb, its not going anywhere and if the firing rings and oil sealing rings haven't compressed and sealed there is something seriously wrong...

But, that's just the way I see it I've never had a problem blowing gaskets or getting them to seal doing things this way

Yeah, heads/blocks back then were gang milled on a horizontal machine... I still find them from time to time that have never been touched... surface finish is still very fine (not as fine as mine.. but finer than if it were face cut) and with later stuff, I'd attribute the courser finishes to the high feed rates needed to keep up with demand and $.. Even the Subaru stuff I work on somtimes has pretty fine milled finish from the factory

I used to surface grind heads at work on a toolroom grinder- everyone and his dog said too smooth, but my gaskets never blew.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I didn't know Rheem had their own toolroom? I have mates who work Prema Press Tools and they do most of the stuff for rheem at the moment,,, and my other friends from Anglade Engineering said they get work from Rheem from time to time as well...

Yeah, I did this head at work, I set it up and let is spark out between morno and lunch

Rheem have a `toolroom' (the 2 inhabitants are classed/paid as toolmakers but are really just good fitters)- as you say most tooling work goes out. But they do a bit of maintenance and sharpening there still.
Way back in the early 80s I was tooling engineer there, I bought most of the press tooling for Rheem's then new model heaters. Much of which is still in use.
Prema supplied some, also Standard Tooling, Coordinate Tooling, and Anglade did a bit too.

Standard Tooling made the very best tools, IMO. Nearly all their 30 year old tools are still being used in production.
The owner (John Silady) is a perfectionist. That company has gone, but he is still in the business (he has done some CNC Mini parts this year for both Karcraft and Mini King).

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Ahhh ok, I was wondering what the go was I'm a little surprised that they don't have a proper captive toolroom given the size of the company and especially given when they started... but I guess these days it probably is cheaper to farm the work out.

Ok, anyway, nicho is probably sick of this banter

The only real proper toolroom Rheem had on the Rydalmere site was back in the 80s, when the packaging plant was there. It made plastic bottles, jars, toothpaste tubes etc. Sometime in the 80s it relocated to Loyalty Rd North Rocks, but has gone now, as package division and all the others (except Water Heater) were sold off.

Container plant had a big machine shop (and a bit of toolmaking) on the site but it got closed down due to union unrest.

/we now return to your regular programming...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.