Here is a picture of the slipper skirt piston.... do not use Teflon buttons with these!!!
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Just re-reading this thread- didn't remember what had happened to Cory's and Paul's engines. I forget who asked "why not a 2332" instead of the 2498 Paul's talking about? Answer-
Because DISPLACEMENT IS EVERYTHING!
The same goes with a 4" bore engine (I think Stan mentioned this)- 82x101.6 = a whopping 2659cc's, and they just get bigger, with 84x101.6= 2724, 86x101.6=2789, 88x101.6= 2854, 90x101.6=2920, and 92 (The size of the crankshaft in the Berg race car when they were running in the low 10's in Super Street in the late '80's or very early '90's) x101.6= 2983cc's! And as Stan also mentioned, the big issue is heads to make it all work. There is a head specialist that can do 4" bore heads in southern California, but he can not be counted on to deliver (after you pays your money, of course!). The JPM heads from Sweden are (from what I've heard) very nice, but very expensive ($3500 US?), and if you're Canadian add 25-35% (depending on the day). Do the 101.6's in Nickies (another $3500!) for the ultimate type 1 and you have $7,000 (US) in heads and pistons/cylinders alone!
Just think- a dual plugged 2789 (I do have a Berg 86mm crank on the bench) with 220? 230? horsepower, all in by 6,000 or so rpm. Oh, yeah- I'll also need either a Todd Francis or Autolinea aluminum high roof case machined for the 4" bore, a 2 or 2 1/8" exhaust (wonder if Tiger at A1 has ever made a Sidewinder with tubing that big?), and only God knows what for carburetors. Anybody got a spare $8500 (no, make that) $10,000 or so they can lend me?
Now you all know what I dream of.
Hey, ALB!
I'll leave it to @PaulEllis to deliver the updates on our engines. Thanks for the shout! I hope to be back on the road as soon as driving weather returns, here on the planet Mercury...
I'm trying hard not to rub in how wonderful the WX has been in New England, lately (we get to enjoy the nice stuff so infrequently), but Cory is a Weather Guy so he already knows. Yesterday our humaditity was 49% with a temp of about 75F (Glorious!), but today is around 64% humaditity and getting sticky at 72F (dew point's right up there.) I think you AZ guys and Lane are in the same boat - Wait til late Sept. to go riding again. In the meantime, just run from A/C to A/C!!
I think Cory, et al, have it worse than we do here in the land of the mosquito. We've had so much rain lately that the temps have been tolerable even if the humadidity isn't.
We were up near 120 a few weeks ago. They always talk about it being a dry heat but when it gets that hot it's hard to breath.
Here you have the chew the air a bit before you swallow. Currently (5:42pm) it's 87 degrees (not too bad) and 75% humidity. This is usually the driest time of day. Still, you guys can keep your 120 degrees, thank you very much.
PaulEllis posted:We were up near 120 a few weeks ago. They always talk about it being a dry heat but when it gets that hot it's hard to breath.
"It's a dry heat"
So is your oven.