Isn't it Piston Depth with a slant ?
| Slant Six Forum https://www.slantsix.org/forum/ |
|
| Piston height https://www.slantsix.org/forum/viewtopic.php?t=62959 |
Page 1 of 1 |
| Author: | joesnow [ Sun Oct 28, 2018 4:08 pm ] |
| Post subject: | Piston height |
Just pulled the head and found I scored a remanufactured 225... 244np sealed power .030 pistons Dang they are deep in the hole.... My head I'm going to use is cut .100 How deep are stock pistons? Any suggestions? Budget is small... I have other stock engines to pick from... Looking to put something together to race... |
|
| Author: | Doctor Dodge [ Sun Oct 28, 2018 4:40 pm ] |
| Post subject: | Re: Piston height |
Factory "blueprint" is .145 down in the cylinder... (-.145 compression height) Most stock engines I measure are in the .180 to .200 negative compression height range. You will need to cut the head AND the block to get the needed compression for decent DCR on a race engine using a performance cam. Shorter custom push rods are needed once you get the compression ( focus on dynamic or "effective" compression) to a place to support a performance camshaft. Try to take most of the deck height reduction material off the block because it has more mass and a thicker "deck". Most of the "race" (big cam) SL6 engines I build need .100 off the block and .050 to .100 off the head... and shorter push rods. DD |
|
| Author: | Greg Ondayko [ Sun Oct 28, 2018 5:59 pm ] |
| Post subject: | Re: Piston height |
My '69 dart uses stock pistons. On stock 225 rods and crank in a 225 block. Approx 0.100" off head and 0.100" off block.. and yes shorter push rods. Greg |
|
| Author: | joesnow [ Mon Oct 29, 2018 6:03 am ] |
| Post subject: | Re: Piston height |
Ok thanks....I'll have to go through what all I have to work with...lancer parts n all. |
|
| Author: | Greg Ondayko [ Mon Oct 29, 2018 7:31 am ] |
| Post subject: | Re: Piston height |
If you are using stock pistons and rods it will anywhere from -0.100" to -0.185" in the hole. Unless you go to 198 type rods or Molnar Rods / K1 Pistions etc that is what you will have to work with. Happy Building! Greg |
|
| Author: | Dart270 [ Mon Oct 29, 2018 9:11 am ] |
| Post subject: | Re: Piston height |
Gotta measure the actual piston-deck ht at TDC. Dial caliper is a good way. If not disassembling the shortblock, you can take 0.100-0.140" off a head to get compression up to 10 or 11:1, if you want. Lou |
|
| Author: | slantzilla [ Mon Oct 29, 2018 6:36 pm ] |
| Post subject: | Re: Piston height |
My Valiant motor has the block and head shaved for 10:1. Yes, I have short pushrods. |
|
| Author: | emsvitil [ Mon Oct 29, 2018 6:49 pm ] |
| Post subject: | Re: Piston height |
Isn't it Piston Depth with a slant ?
|
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|