safe rev limit on stock internals

1. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #1 23rd March 2012, 13:07

   what would you lot say was a safe rev limit for a vtr on stock rods and pistons
   
   was gonna rev it to 8k but im not too sure now as i think itll just throw a rod out the front of the block
   
   tempted to buy some ARP rod bolts..but now its eaten a valve im not sure i want to waste any more money on this engine.. for the possible weakend rod on cylinder 3..(the one that ate the valve)..we have a little ding in the piston which i wouldnt bat an eyelid over on a normal car..but being as though its boosted it changes things slightly!!
   
   it will get a forged lump but not yet..
   
   
   the damage is minor..ish but still could have weakend the rod.
   
2. user_57322 Regular Poster Joined: Feb 2012 Posts: 334

   #2 23rd March 2012, 14:03

   My boosted GTI is limited to 7250. I'd reccomend fitting ARP bolts, don't need to cost much
3. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #3 23rd March 2012, 15:23

   16v run different rods to 8valves
   
   I'm half tempted to get rod bolts.. But not fully sure I should on this engi e
4. user_57322 Regular Poster Joined: Feb 2012 Posts: 334

   #4 23rd March 2012, 15:30

   Ahh didn't see it was a VTR.
   
   What's your hesitation with rod bolts? Money?
5. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #5 23rd March 2012, 15:52

   Thought the standard bottom ends could take 9000 (from what i've read atleast)
6. JoshB Saxperience Forum Bum Joined: Dec 2008 Pontefract Posts: 4007 2010 E92 320i MSport

   #6 23rd March 2012, 16:06

   Wouldn't the turbo be the limiting factor anyway?
7. Davo106 Established Member Joined: Mar 2008 Corwen, North Wales. Posts: 1963 Megane R26

   #7 23rd March 2012, 16:12

   9k, It can pretend its a honda.
   
   Seriously though i'd just goto 7k, not that i really know what the effect of the damaged piston could do. Slightly above standard and if your planning on going forged anyway you'll want to raise it up more then anyway.
8. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #8 23rd March 2012, 16:14

   Green valve springs fitted and set it to 8k. I would!

   1 user thanked this post: blackie_2k5
9. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

   #9 23rd March 2012, 16:18

   Quote:

   Originally Posted by Greedo Ahh didn't see it was a VTR. What's your hesitation with rod bolts? Money?

   It's a lot more likely to blow now it's took jab or 2 to the piston having already suffered a year of abuse
   
   

   Quote:

   Originally Posted by Gandi699 Thought the standard bottom ends could take 9000 (from what i've read atleast)

   I'm not sure mate, 8k is quite a lot of revs.. I know lots run the 16vs up to 8k and so, but these use a slightly diff rod and Gudgeon pin
   
   

   Quote:

   Originally Posted by JoshB Wouldn't the turbo be the limiting factor anyway?

   Yeah to an extent, but I'll going for a new turbo soon that should have power to the red line at or near 8k
10. jones91 Established Member Joined: Jun 2011 Bridgnorth (Shropshire) Posts: 2001 Jdm Dc2 Integra

    #10 23rd March 2012, 19:41

    I think I read somewhere once that the 8v's are good up to about 6750k, I'd of thought anything over that you would be running a bit of a risk
11. blackie_2k5 Saxperience Hardcore! Joined: Oct 2008 Birtley Posts: 22253 VTR Turbo, 106 xsi track slag, Transit recovery, B

    #11 23rd March 2012, 19:51

    Quote:

    Originally Posted by jones91 I think I read somewhere once that the 8v's are good up to about 6750k, I'd of thought anything over that you would be running a bit of a risk

    That's a roller rocker engine, IMO you'd be pushing you luck at that, I dropped a valve with stock rev limit lol
12. tweeqd Established Member Joined: Mar 2006 Farnham Surrey Posts: 1542 AX GT 16v turbo 6 speed with NOS 205 gti6 E 320

    #12 23rd March 2012, 20:03

    ax GTI runs 7200 rev limit as standard
13. NismoSteve Frequent Poster Joined: Dec 2011 Thorne+Grimsby Posts: 717 S2GTi / Megane cc

    #13 23rd March 2012, 20:16

    Matey boy who used to run puma race engines said the 8 valve bottom end is pretty bullet proof. Revving to 8k with decent rod bolts.
    If it was mine I'd chuck that one back together and run it sympathetically while building a rock solid bottom end up
14. Gareth_R Established Member Joined: Mar 2010 Basildon, Essex Posts: 1042 Citroen AX VTS

    #14 23rd March 2012, 21:26

    As Mart says. I'll be running my vtr block on GTi management so 7200 limit
15. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

    #15 23rd March 2012, 21:46

    The standard rallye/xsi could do 7200 anyway with the green valve springs in it. I wouldnt worry too much about going up to 8 or just under
16. xxo0pko0xx Established Member Joined: May 2009 cleethorpes, Lincolnshire Posts: 1830 Astra 2006 (55) 1.9 cdti 150 sri 192hp 322ftlb

    #16 23rd March 2012, 21:50

    my 8v engine with stage 2 p&p abd bigger valves, uprated springs and lifters at 7500 but i believe theyre ok to run 8k as i had a mate that ran 8k on a classic mini