Cylinders Scuffed Vertically - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech Cylinders Scuffed Vertically

Print Thread

Cylinders Scuffed Vertically #703850 05/20/10 10:02 PM 05/20/10 10:02 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	Pulled my 446" out of my challenger to take a peak inside and change the oil pan. I pulled the pan and was looking at the cylidners and theres a good amount of scuffing on the cylinder walls right where the skirt is lonnger on the piston. This is a .030 440 with ross 82008's. What causes this/ is it normal?

Re: Cylinders Scuffed Vertically [Re: 440challenger] #703851 05/20/10 10:19 PM 05/20/10 10:19 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Dirt,,,if you have a pile of miles on it...yes it is

Re: Cylinders Scuffed Vertically [Re: MR_P_BODY] #703852 05/20/10 10:29 PM 05/20/10 10:29 PM
Joined: Feb 2003 Posts: 4,503 NJ 4 440challenger OP master
440challenger OP master 4 Joined: Feb 2003 Posts: 4,503 NJ	hmm dirt ? the motor has been together for 6 years. i got some hard time on her

Re: Cylinders Scuffed Vertically [Re: 440challenger] #703853 05/20/10 10:31 PM 05/20/10 10:31 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: hmm dirt ? the motor has been together for 6 years. i got some hard time on her Yep... dirt... could have even been in there when you did the engine

Re: Cylinders Scuffed Vertically [Re: 440challenger] #703854 05/20/10 10:31 PM 05/20/10 10:31 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Will also depend on piston to wall clearance , short stroker pistons are prone to this (rock).

Re: Cylinders Scuffed Vertically [Re: 440challenger] #703855 05/20/10 10:35 PM 05/20/10 10:35 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing master
Dunnuck Racing master Joined: Mar 2007 Posts: 3,300 Northern Indiana	Racing an engine that has not been properly warmed up can cause scuffing as well www.dunnuckracing.com

Re: Cylinders Scuffed Vertically [Re: Dunnuck Racing] #703856 05/20/10 10:56 PM 05/20/10 10:56 PM
Joined: Jun 2009 Posts: 705 Michigan H Hemiroid super stock
Hemiroid super stock H Joined: Jun 2009 Posts: 705 Michigan	I've noticed that Ross skirts always seem scuffed no matter what the use. Not sure why, just been my experience.

Re: Cylinders Scuffed Vertically [Re: MR_P_BODY] #703857 05/21/10 08:56 AM 05/21/10 08:56 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Quote: hmm dirt ? the motor has been together for 6 years. i got some hard time on her Yep... dirt... could have even been in there when you did the engine Dirt for sure...

Re: Cylinders Scuffed Vertically [Re: Hemiroid] #703858 05/21/10 10:27 AM 05/21/10 10:27 AM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	Quote: I've noticed that Ross skirts always seem scuffed no matter what the use... I believe someone else on here made a similar comment recently. They certainly do seem to have some thin skirts compared to other aftermarket pistons I've seen.

Re: Cylinders Scuffed Vertically [Re: BradH] #703859 05/21/10 07:37 PM 05/21/10 07:37 PM
Joined: Jan 2007 Posts: 8,043 Mt Morris Michigan mopar dave master
mopar dave master Joined: Jan 2007 Posts: 8,043 Mt Morris Michigan	my CP's did the same thing to my 360 block. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: Cylinders Scuffed Vertically [Re: BradH] #703860 05/21/10 07:50 PM 05/21/10 07:50 PM
Joined: Aug 2003 Posts: 43,283 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,283 Bend,OR USA	Quote: Quote: I've noticed that Ross skirts always seem scuffed no matter what the use... I believe someone else on here made a similar comment recently. They certainly do seem to have some thin skirts compared to other aftermarket pistons I've seen. (I have made those comments before) I have built and dynoed tested a lot of motors with Ross pistons, it seems to me that they have delicate skirts, mark up very quickly and do mark the cylinder walls up some in the break in process also I'm now using Diamond brand pistons for those reasons Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Cylinders Scuffed Vertically [Re: Cab_Burge] #703861 05/22/10 07:38 PM 05/22/10 07:38 PM
Joined: May 2009 Posts: 511 Temperance, MI 6 68 HEMI GTS mopar
68 HEMI GTS mopar 6 Joined: May 2009 Posts: 511 Temperance, MI	chamfering the bottoms of the bores with a grinder to take off the sharpness helps to prevent piston scuffing. 68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car

Re: Cylinders Scuffed Vertically [Re: 68 HEMI GTS] #703862 05/22/10 11:31 PM 05/22/10 11:31 PM
Joined: Dec 2006 Posts: 4,647 aotearoa rebel master
rebel master Joined: Dec 2006 Posts: 4,647 aotearoa	15 runs with Ross pistons & i had very noticable scratch marks. the sharp edge of the bottom of the bore was scouring my pistons draging crap up for the piston to scratch on it's way down on a compression stroke. chamfered the lower boere lip & my KB pistons look great & so does my bore.

Re: Cylinders Scuffed Vertically [Re: Dunnuck Racing] #703863 05/23/10 06:47 AM 05/23/10 06:47 AM
Joined: Sep 2003 Posts: 2,175 Duloc T The Shadow top fuel
The Shadow top fuel T Joined: Sep 2003 Posts: 2,175 Duloc	Quote: Racing an engine that has not been properly warmed up can cause scuffing as well

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1