Should have been easy to know where to grind
| Slant Six Forum https://slantsix.org/forum/ |
|
| Bent Intake Valves w/ Wiseco ProTru Pistons :-( https://slantsix.org/forum/viewtopic.php?t=39249 |
Page 2 of 4 |
| Author: | Joshie225 [ Fri Mar 05, 2010 1:56 pm ] |
| Post subject: | |
Quote: The pistons are Down .0025" to .008" Most are .005" Greg |
|
| Author: | Shaker223 [ Fri Mar 05, 2010 2:03 pm ] |
| Post subject: | |
Quote: Quote: The pistons are Down .0025" to .008" Most are .005" Greg |
|
| Author: | Joshie225 [ Fri Mar 05, 2010 2:19 pm ] |
| Post subject: | |
Sorry, dropped a zero, typo not a math problem. Still over 5 thousandths isn't cool. It's probably the crank. |
|
| Author: | Doc [ Fri Mar 05, 2010 2:45 pm ] |
| Post subject: | |
Or a non parallel top deck to crank main line... if you see a consistent increase / decrease, end to end. |
|
| Author: | Shaker223 [ Fri Mar 05, 2010 6:57 pm ] |
| Post subject: | |
Could be rods too. |
|
| Author: | madmax/6 [ Fri Mar 05, 2010 7:20 pm ] |
| Post subject: | |
Mine are .010 down.My block was decked a little more,I also took .020 off the pistons to get them there.I also sanded a couple to get them closer.I am actually .009 to .011 down. I dremeled my pistons today for the valve clearence,will do final kiss tommorrow and check again with least bent valve.One allmost survived.Exhaust are a little to close for my likeing also.Guzzi Mark |
|
| Author: | Shaker223 [ Fri Mar 05, 2010 7:36 pm ] |
| Post subject: | |
Should have been easy to know where to grind
|
|
| Author: | madmax/6 [ Fri Mar 05, 2010 7:58 pm ] |
| Post subject: | |
Far from easy or fun,worst part of build so far,my back is killing me.Haveing motor back 1.5 inches didnt help on number 6.Guzzi Mark |
|
| Author: | Greg Ondayko [ Sat Mar 06, 2010 3:20 pm ] |
| Post subject: | |
Quote: Or a non parallel top deck to crank main line... if you see a consistent increase / decrease, end to end.
Well No they are not consistent from front to rear. They seem to be random. I dont have the #'s for each one with me now - They are on a notecard at home. I will have to post them. Greg |
|
| Author: | Joshie225 [ Sat Mar 06, 2010 4:08 pm ] |
| Post subject: | |
Quote: Could be rods too.
If K1 did that to their customers I'd be unhappy and surprised. The deck heights of the 170 I tore down were also way off. I'm having the crank stroke and rod lengths checked. The pistons are within 1/2 a thousandth of one another.
|
|
| Author: | Shaker223 [ Sat Mar 06, 2010 4:41 pm ] |
| Post subject: | |
If you recall, K1 did have a problem with the tang being machined on the wrong side of the rod and cap. Never say never. They admitted the mistake and fixed it...no big deal. Probably not the pistons either. I don't have them in my engine yet to check the height but the diameter of all 6 measured within .0003". Four are within .0002" of each other. |
|
| Author: | 1969ronnie [ Sat Mar 06, 2010 8:27 pm ] |
| Post subject: | |
thanks greg for pics. my guess from pics 4 , 5 , and 6 at about the 2 o'clock area looked like -.080 to -.100. i was way off . ronnie |
|
| Author: | Joshie225 [ Sat Mar 06, 2010 8:32 pm ] |
| Post subject: | |
When it comes time to cut valve reliefs in my pistons I'm going to use a transfer punch through the valve guides to mark the valve centers. Since the reliefs will be cut in stock replacement type forgings they will be as shallow as is practical. |
|
| Author: | pishta [ Mon Jun 20, 2011 7:01 pm ] |
| Post subject: | |
Dang Mark, thats a drag. I still have to come by and say hi, Im working tomorrow after 11 days off. Will pop in and introduce myself if Im on the good side of town (rarely!) |
|
| Author: | Rick Covalt [ Thu May 21, 2015 1:29 pm ] |
| Post subject: | |
I know these are very old posts but was wondering if Wiseco ever changed the valve notches on the new pistons? We will have 2 motors going together shortly and was just wondering. Rick |
|
| Page 2 of 4 | All times are UTC-07:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|