Moderator: Team
Post Reply
- Print view
6 posts• Page 1 of 1
Tom68
- HotPass
- Posts: 2608
- Joined: Mon Feb 07, 2022 3:43 am
- Location: VIC OZ
Driving 4 Answers tackles cylinder offset
- Quote
Postby Tom68 »
Well put together as per usual.
Ignorance leads to confidence more often than knowledge does.
Nah, I'm not leaving myself out of the ignorant brigade....at times.
Top
- tjus
- New Member
- Posts: 28
- Joined: Tue Jun 12, 2007 9:37 pm
- Location:
Re: Driving 4 Answers tackles cylinder offset
- Quote
Postby tjus »
his offset tdc made no sense..............
Top
- dannobee
- Expert
- Posts: 900
- Joined: Mon Nov 04, 2019 9:01 pm
- Location:
Re: Driving 4 Answers tackles cylinder offset
- Quote
Postby dannobee »
Lots of stuff in that video conflicts with what those who have actually tested this stuff have found.
Today's pistons are offset 0.5mm toward the thrust side to reduce friction and minimize piston rocking noise.
Here's the Mahle white paper that goes over all of this in great detail. Piston offset is on page 154.
https://fdocuments.in/document/pistons- ... l?page=166
And in his comments after the video, he supposes piston offset is in the 15mm range. No way in hell.
Top
- hoffman900
- HotPass
- Posts: 3488
- Joined: Sat Feb 23, 2013 5:42 pm
- Location:
Re: Driving 4 Answers tackles cylinder offset
- Quote
Postby hoffman900 »
dannobee wrote: ↑Mon Mar 27, 2023 9:43 amLots of stuff in that video conflicts with what those who have actually tested this stuff have found.
Today's pistons are offset 0.5mm toward the thrust side to reduce friction and minimize piston rocking noise.
Here's the Mahle white paper that goes over all of this in great detail. Piston offset is on page 154.
https://fdocuments.in/document/pistons- ... l?page=166
And in his comments after the video, he supposes piston offset is in the 15mm range. No way in hell.
Single cylinder MX bikes range from 0-12mm offset.
-Bob
Top
BOOT
- Guru
- Posts: 2909
- Joined: Fri Apr 09, 2010 6:23 pm
- Location: Michigan
Re: Driving 4 Answers tackles cylinder offset
- Quote
Postby BOOT »
Didn't watch the vid, some of his past stuff I'm kinda like well what about this or that n.....
Sometimes people get too caught up in math and not actual use or real world examples. Sometimes real world use has unforeseen factors. Sometimes rules don't apply or even reverse in different situations. In the end what actually works, well it works and that is all that matters
Channel About My diy Projects & Reviews https://www.youtube.com/c/BOOTdiy
I know as much as I can learn and try to keep an open mind to anything!
If I didn't overthink stuff I wouldn't be on speedtalk!
Top
Tom68
- HotPass
- Posts: 2608
- Joined: Mon Feb 07, 2022 3:43 am
- Location: VIC OZ
Re: Driving 4 Answers tackles cylinder offset
- Quote
Postby Tom68 »
dannobee wrote: ↑Mon Mar 27, 2023 9:43 amLots of stuff in that video conflicts with what those who have actually tested this stuff have found.
Today's pistons are offset 0.5mm toward the thrust side to reduce friction and minimize piston rocking noise.
Here's the Mahle white paper that goes over all of this in great detail. Piston offset is on page 154.
https://fdocuments.in/document/pistons- ... l?page=166
And in his comments after the video, he supposes piston offset is in the 15mm range. No way in hell.
He does at one point mention there isn't much in it and it's mostly now done on low height (short rod) engines with high operating speeds.
15mm cylinder offset to clearly show the effect.
Offset 15mm.jpg
Offset.jpg
You do not have the required permissions to view the files attached to this post.
Ignorance leads to confidence more often than knowledge does.
Nah, I'm not leaving myself out of the ignorant brigade....at times.
Top
Post Reply
- Print view
6 posts• Page 1 of 1
Return to “Engine Tech”
Jump to
- Speed-Talk
- ↳ Announcements
- ↳ In Memory of Don Terrill
- Technical
- ↳ Engine Tech
- ↳ Advanced Engine Tech
- ↳ Vintage/Classic/Historical Engine Tech
- ↳ Chassis / Suspension / Body
- ↳ General Tech
- ↳ Subscribe to HotPass
- ↳ Speed-Talk Vendor Marketplace
- ↳ Auto Gear Equipment
- ↳ CCA Racing Products
- ↳ Competition Fuel Systems
- ↳ Heads 1st
- ↳ Jones Cam Designs
- ↳ Koehler Injection
- ↳ Lightning Racing Carbs
- ↳ MaxRaceSoftware
- ↳ PBM-Erson
- ↳ Schmidt Motor Works
- ↳ Speier Racing Heads
- ↳ Stan Weiss' Software
- ↳ TFX Engine Technology Inc.
- ↳ Speed-Talk interviews
- ↳ David Vizard forum
- ↳ HotPass Advanced Tech forums
- ↳ Valve Train
- ↳ EFI
- ↳ Supercharging
- ↳ Chassis setup
- General Category
- ↳ Industry / Business
- ↳ Forum Help / Questions / Tips
- Classifieds
- ↳ Shop Equipment - For Sale or Wanted
- ↳ Other - For Sale or Wanted
- Offtopic forums
- ↳ Offtopic Forum