Post #1
Hi does anyone know what rpm limit standard internals are good for before having to change bolts, rods, crank Etc Cheers
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displaying posts 1 to 10 of 10
| Author | Subject: Rpm limit |
 tarret
Regular  Location: Maidstone Registered: 27 Sep 2009 Posts: 323 Status: Offline |
Cheers |
 Posted 25th Dec 2012 at 11:33
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #2
Depends how long you run them at max rpm for as stress is cumulative. 7,400 probably fine all day long, 8,000 probably 500-1000 miles of hard use with better rod bolts, 9,000 probably all of ten seconds without forged rods and pistons. Not a lot to be gained by increasing the rpm on standard cams though as torque drops off rapidly past 6,500.________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 25th Dec 2012 at 11:37
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tarret
Regular Location: Maidstone Registered: 27 Sep 2009 Posts: 323 Status: Offline |
Post #3
I'm currently revin to 7200rpm in my s16 with kent cams, bike bodies and remap, bhp and torque figures are constant all the way, but due to it being quite high millage now :/ its due a rebuild and was curious on what the internals are capible of so I know if to uprate them or not,Cheers davey |
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Posted 25th Dec 2012 at 11:52
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #4
shouldn’t need to rev it much further at all, check the cam timing, having it retarded will push peak power up the rpm and drop torque.its the valvetrain that limits things in the main. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 25th Dec 2012 at 12:10
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aaron6
Seasoned Pro  Location: On the sofa in maidstone Registered: 16 May 2006 Posts: 5,840 Status: Offline |
Post #5
Your engines alright dean. It don't smoke or make dodgey noises. I'd say just raise it a tad if need be but I reckon once you map it you'll probably not need too.  ________________________________________ See the sheer power and might of the lesser known burrowing owl. |
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Posted 25th Dec 2012 at 12:19
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tarret
Regular Location: Maidstone Registered: 27 Sep 2009 Posts: 323 Status: Offline |
Post #6
Does smoke under load and smokes out of the dipstick :/ and having 104psi in cylinder 3 can't be good lol |
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Posted 25th Dec 2012 at 12:29
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #7
err, yeah, should be double that  ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 25th Dec 2012 at 12:45
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tarret
Regular Location: Maidstone Registered: 27 Sep 2009 Posts: 323 Status: Offline |
Post #8
Yeah that's what I was thinkin, it's got no low down power till atleast 4200rpm, which is depressing |
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Posted 25th Dec 2012 at 12:47
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #9
well sort the compression when whilst putting it back together sort the cam timing  ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 25th Dec 2012 at 12:57
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tarret
Regular Location: Maidstone Registered: 27 Sep 2009 Posts: 323 Status: Offline |
Post #10
Cam timing was done when I had it remapped, but defo need to sort the compression out asap |
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Posted 25th Dec 2012 at 12:58
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