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displaying posts 1 to 11 of 11
| Author | Subject: Engine balancing |
 demondriverdan
Seasoned Pro  Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #1
Is it worth getting the crank / rods / pistons / flywheel etc. balanced? I'm going to be taking the head off and probably pistons out of the race car's engine again soon and wondered about getting the bottom end balanced up while it was apart. I've read various things about whether it's worth it or not but wondered if anyone has done it on the RS engine?________________________________________ Rallye Race Car |
 Posted 23rd Nov 2017 at 09:13
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superchargedblack1997gti6
Seasoned Pro  Location: guildford Registered: 15 Aug 2009 Posts: 2,376 Status: Offline |
Post #2
Speak to Miles mate he has done it a lot has a good contact, worth doing if you’re going to be revving it a lot higher, are you going forged at all?________________________________________ Super high boost Completed, destroyer of gearboxes and 160mph club |
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Posted 23rd Nov 2017 at 09:56
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #3
Nothing forged and only revving to 7250 at the moment so nothing special________________________________________ Rallye Race Car |
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Posted 23rd Nov 2017 at 09:59
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superchargedblack1997gti6
Seasoned Pro Location: guildford Registered: 15 Aug 2009 Posts: 2,376 Status: Offline |
Post #4
Not worth the money then mate spend it on some head Work?________________________________________ Super high boost Completed, destroyer of gearboxes and 160mph club |
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Posted 23rd Nov 2017 at 10:04
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #5
Head's already been done before I bought it________________________________________ Rallye Race Car |
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Posted 23rd Nov 2017 at 10:26
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,870 Status: Offline |
Post #6
I doubt it really, oem pug stuff is inherently well matched already, only time you would need to balance stuff is after removal of material and when pushing the RPM well past design spec, as it is you're not going to the Phase1 rev limiter even.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 23rd Nov 2017 at 11:36
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #7
That's what I was thinking. Only real changes to the bottom end are pocketed pistons and a lightweight flywheel so I was debating whether it was worth it, sounds like it's not.________________________________________ Rallye Race Car |
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Posted 23rd Nov 2017 at 11:45
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bigbadbowen
Seasoned Pro
 Location: Winchester Registered: 21 Nov 2003 Posts: 13,753 Status: Offline |
Post #8
Cranks are terribly balanced on these engines so I’d have it done if it was my engine and it’s hardly a massive cost, you will get a before and after graph and will be amazed just how out they are |
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Posted 23rd Nov 2017 at 11:56
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #9
Complete opposite to what WP just said  ________________________________________ Rallye Race Car |
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Posted 23rd Nov 2017 at 11:58
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bigbadbowen
Seasoned Pro
Location: Winchester Registered: 21 Nov 2003 Posts: 13,753 Status: Offline |
Post #10
I’ve seen many balanced cranks graphs before and after and trust me it’s well worth having done |
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Posted 23rd Nov 2017 at 18:40
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prism7guy
Seasoned Pro  Location: DoncastAAAAARGH Registered: 13 Jan 2008 Posts: 4,644 Status: Offline |
Post #11
The way i understood it, aside from helping reduce stresses in high revving engines is that an unbalanced assembly will be trying to shake itself as it spins which wastes energy, so having it balanced will potentially increase power slightly by increasing the efficiency.I have no real world experience of having anything balanced yet though, just what i once read somewhere. ________________________________________ Goldie the track car. |
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Posted 23rd Nov 2017 at 18:50
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