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displaying posts 1 to 21 of 21
| Author | Subject: What should engine be revving at at certain speeds? |
 kezman7
Senior User  Location: Castleford Registered: 20 Feb 2009 Posts: 762 Status: Offline |
Post #1
Something i noticed the other day and got me thinking...In 6th at 70mph its revving at 4.5k To me this seems alittle high for cruizing. Surely it should be alittle lower than that?? Ticks over at around 900rpm. Also seems to have lost abit of power since i fitted this new exhaust would a new backbox affect the revs? |
 Posted 29th Dec 2009 at 16:59
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allesclar
Seasoned Pro  Location: Sheffield Registered: 17 May 2009 Posts: 4,254 Status: Offline |
Post #2
yes thats about 1200 revs too high. I would get it looked at, could be the clutch?________________________________________ Team allesclar ® |
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Posted 29th Dec 2009 at 17:02
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kezman7
Senior User Location: Castleford Registered: 20 Feb 2009 Posts: 762 Status: Offline |
Post #3
I knew something was'nt right, Cluch seems ok, don't slip and bite is pretty low on the pedal. Going to Carl for a caliper change as soon as i get a day off work so will see what he things. |
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Posted 29th Dec 2009 at 17:04
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kezman7
Senior User Location: Castleford Registered: 20 Feb 2009 Posts: 762 Status: Offline |
Post #4
Just remembered that there HDI clocks but with the petrol insert so maybe thats the reason. might just be clock reading wrong? Speedo reads fine in par with satnav so unsure? |
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Posted 29th Dec 2009 at 17:06
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justinaccurate
Seasoned Pro  Location: Cov Registered: 29 Apr 2006 Posts: 14,425 Status: Offline |
Post #5
1200 out are you sure?3K rpm in 6th is about 60 mph |
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Posted 29th Dec 2009 at 17:20
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kezman7
Senior User Location: Castleford Registered: 20 Feb 2009 Posts: 762 Status: Offline |
Post #6
Ill go out now and see what it is at 60 in 6th and also afew other speeds |
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Posted 29th Dec 2009 at 17:27
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allesclar
Seasoned Pro Location: Sheffield Registered: 17 May 2009 Posts: 4,254 Status: Offline |
Post #7
justinaccurate wrote: 1200 out are you sure? 3K rpm in 6th is about 60 mph yeah, that gives you about 3300 revs at 70mph, thats what mine is rougly ________________________________________ Team allesclar ® |
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Posted 29th Dec 2009 at 17:55
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #8
kezman7 wrote: Just remembered that there HDI clocks but with the petrol insert so maybe thats the reason. might just be clock reading wrong? Speedo reads fine in par with satnav so unsure? That's more than likely the reason why  What does the rev counter read on the limiter? ________________________________________ Rich |
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Posted 29th Dec 2009 at 18:16
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matt evans
Seasoned Pro  Location: Stourbridge Registered: 16 Sep 2009 Posts: 2,290 Status: Offline |
Post #9
My 6 reads exactly 3250rpm at 70mph in 6th gear, in 195/55/15 tyres as well.65mph is exactly 3000rpm ________________________________________ 1999 Astor Grey GTi-6 OEM+ (now gone...)2004 Aegean Blue 206 GTi 180 (also gone...) 2006 Skoda Fabia vRS in Sprint Yellow honestly3k wrote: Do you wrestle for a living matt? You sound like a monster  owain wrote: Nothing involving a 306 can be considered worthwhile. |
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Posted 29th Dec 2009 at 20:32
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cabbymeg
Regular  Location: Alfreton/Derbyshite Registered: 04 Sep 2009 Posts: 323 Status: Offline |
Post #10
matt evans wrote: My 6 reads exactly 3250rpm at 70mph in 6th gear, in 195/55/15 tyres as well. Snap, apart from i'm on 50 profiles. I've set my speedo using sat nav so should be pretty accurate. |
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Posted 29th Dec 2009 at 21:09
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jaydog81
Regular  Location: york Registered: 12 Dec 2007 Posts: 351 Status: Offline |
Post #11
Sure your in 6th. ________________________________________ *jay81.Phase 2.5/S-99 Team i live for working,Paying bills and funding my hobbies. I wish my life could be just living for a pink "I love the 6 sticker".  |
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Posted 29th Dec 2009 at 22:22
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kezman7
Senior User Location: Castleford Registered: 20 Feb 2009 Posts: 762 Status: Offline |
Post #12
The dial reads 8k and when revved it hits it at just off the dial. Ye sure its in 6th I had to check afew times. Will try the old Gti dials tomorrow and if they show different then ill have to get a new set |
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Posted 30th Dec 2009 at 02:55
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antcla.85
Senior User  Location: Southampton Registered: 18 Dec 2007 Posts: 580 Status: Offline |
Post #13
Just thinking today, it may be a real stupid question so i'm ready to take a slating, but would a engine rev higher at a certain speed if it had a lightened flywheel?  ________________________________________ Life is short, make it interestingBuy a Peugeot! |
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Posted 30th Dec 2009 at 23:58
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #14
no ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 31st Dec 2009 at 00:03
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antcla.85
Senior User Location: Southampton Registered: 18 Dec 2007 Posts: 580 Status: Offline |
Post #15
welshpug! wrote: no Ah....Thanks Right end of then, no more comments needed. ________________________________________ Life is short, make it interestingBuy a Peugeot! |
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Posted 31st Dec 2009 at 00:08
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cwspellowe
Seasoned Pro  Location: Calderbank Registered: 19 Jul 2009 Posts: 6,496 Status: Offline |
Post #16
kezman7 wrote: The dial reads 8k and when revved it hits it at just off the dial. Ye sure its in 6th I had to check afew times. Will try the old Gti dials tomorrow and if they show different then ill have to get a new set Sure the rev limiter is set at about 7300rpm? Looks like it's definitely overreading for some reason. ________________________________________ Bye bye Sundance Kid |
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Posted 31st Dec 2009 at 00:11
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #17
I suspect it's down to the HDi flywheel having a different speed pick-up configuration and therefore the signal the sensor produces is a different frequency to one produced by the GTi's setup. (Sounds like it's a lower frequency on the HDi if the rev counter is over reading on the GTi setup) This also fits with the reading being near correct at low revs and increasing in inaccuracy as the engine speed increases as the HDi rev counter will obviously be calibrated to the HDi pick-up. kezman7 wrote: Will try the old Gti dials tomorrow and if they show different then ill have to get a new set I take it there's a problem with the GTi clocks but the rev counter still works? The GTi rev counter may still work correctly if you put it into the HDi clocks. ________________________________________ Rich |
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Posted 31st Dec 2009 at 07:03
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toby
Seasoned Pro  Location: Bourne Registered: 13 Dec 2007 Posts: 1,400 Status: Offline |
Post #18
Gearing in sixth should be 21.5 mph per 1000 rpm.So 70mph is 3256rpm, in real life terms the speedo will probably show a bit more as they over read. ________________________________________ Previous Peugeot - 2000(w)GTI-6, Me old China, Supercharged with working aircon! |
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Posted 31st Dec 2009 at 21:36
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #19
3252 rpm @ 70 mph on 195 55 15 and an early 4.05 FD, later cars have a 3.95 F.D so 22.1 mph/1000 and 3171 rpm @ 70 mph on 195 55 15. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 31st Dec 2009 at 23:03
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anthony
Regular Location: Swindon Registered: 26 Jul 2004 Posts: 108 Status: Offline |
Post #20
welshpug! wrote: 3252 rpm @ 70 mph on 195 55 15 and an early 4.05 FD, later cars have a 3.95 F.D so 22.1 mph/1000 and 3171 rpm @ 70 mph on 195 55 15. Pretty sure that it's the other way around - early cars had the longer 3.95 (19x75) FD, which was shortened to 4.06 (19x77) on the later cars, I assume to improve acceleration to compensate for the increased weight of the Phase 2/3 models over the Phase 1's. ________________________________________ 1989 Eunos Roadster // 1992 Peugeot 205 GTi-S 1.9 // 1999 Peugeot 306 HDi Meridian |
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Posted 1st Jan 2010 at 21:15
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,839 Status: Offline |
Post #21
quite right, got it wrong way round, always thought the earlier higher RPM Limit went with the lower F/D, date show in SB is 1997 06 01In that case I'd like a phase 1 6 box for my 405 not a phase 2 on box. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 1st Jan 2010 at 21:30
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