Terry Field Posted January 30, 2023 Share Posted January 30, 2023 1999 1.8 K seriesI seem to remember reading somewhere that the K series installation includes a built in rev limiter.Is that correct? Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted January 30, 2023 Area Representative Share Posted January 30, 2023 Yes. Standard 1.8 k with mems ecu included a rev limiter (at least it did on my 140 bhp 1.8 supersport) Link to comment Share on other sites More sharing options...
K7 VCT Posted January 30, 2023 Share Posted January 30, 2023 Have u never found it..... Link to comment Share on other sites More sharing options...
Toby S Posted January 30, 2023 Share Posted January 30, 2023 Early 1400 K Supersport has a one - 7,600rpm, rev counter that only goes up to 7,000 (original VDO guage same as off the x-flow), but a handy change up light which comes on at 7,400 Link to comment Share on other sites More sharing options...
Terry Field Posted January 30, 2023 Author Share Posted January 30, 2023 #3 Not knowingly, but I missed a gear today which prompted the question!! Do we know if the limit on the 1.4 and the 1.8 are the same?Thanks for the advice chaps Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 1, 2023 Leadership Team Share Posted February 1, 2023 1.4 is higher. Link to comment Share on other sites More sharing options...
john milner Posted February 1, 2023 Share Posted February 1, 2023 You might want to download some free software and have a look at the definite number.https://andrewrevill.co.uk/MEMS3Flasher.htm Link to comment Share on other sites More sharing options...
Roger Ford Posted February 1, 2023 Share Posted February 1, 2023 1999 is EU2 so may be different, but the EU3 certainly had a limiter. When you say "missed a gear" did you rev it in neutral, or did you put it into 3rd instead of 5th, or something similar. You will still over-rev the engine if that happens, limiter or not, but that said I did it several times (with some scary numbers in the ACES memory) but it never did any obvious harm. Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted February 1, 2023 Area Representative Share Posted February 1, 2023 Looking at my old catalogues it seems the 1.8 and 1.6 Supersports both had maximum rpm of 7600 with shift light warning at 7400. SLR max rpm 8000 with shift light warning at 7750. No mention of max revs for non supersport or VVC but I seem to recall they had a rev limiter but no shift light. Link to comment Share on other sites More sharing options...
Area Representative Golf Juliet Tango Posted February 1, 2023 Area Representative Share Posted February 1, 2023 My rev limiter won't travel in the Seven. Link to comment Share on other sites More sharing options...
Terry Field Posted February 2, 2023 Author Share Posted February 2, 2023 Stephen, I have the same problem!I revved it hard in neutral, although I caught it before it got too high, but it just raised the question in my mind. Why will the limiter not work when the car is in neutral? I fitted an after market limiter in my old XFlow, and that certainly worked in neutral.#9 Paul, there is no shift light.#7 Thanks John, but I am not going down that route - way beyond my pay grade! Thanks for all,the comments. Link to comment Share on other sites More sharing options...
Ray Pearce Posted February 2, 2023 Share Posted February 2, 2023 Yes, it has got a rev limiter.It does work in neutral but won't help if you buzz the engine by changing down a gear rather than up.I think it will be fine - a quick blip in neutral with the limiter doing it's job will have no ill effects. Link to comment Share on other sites More sharing options...
Roger Ford Posted February 2, 2023 Share Posted February 2, 2023 Also in neutral there's no load on the engine. I could be wrong, but I think high revs at low load is much safer than high revs at full load. Link to comment Share on other sites More sharing options...
Area Representative Geoff Brown Posted February 2, 2023 Area Representative Share Posted February 2, 2023 Rev limit is lower than either 1.4 or 1.8. I do believe that 1.8s have lunched themselves due to persistent revving to the limit.Probably due to the change in stroke to achieve 1800cc ? Link to comment Share on other sites More sharing options...
John Vine Posted February 2, 2023 Share Posted February 2, 2023 #14 I do believe that 1.8s have lunched themselves due to persistent revving to the limit.Oily recommended keeping a 1.8K with standard (non-Trophy160) pistons below 7300 for fear of damaging the piston lands.That always worried me with my 1.8K SS-R, which had its limiter set to 7600.JV Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted February 2, 2023 Area Representative Share Posted February 2, 2023 Terry. I think the shift light was only fitted to supersport versions. Also I don't think blipping the throttle in neutral will test the rev limiter. The limiter simply cuts the spark. I'm sure that you can blip the throttle and momentum will take it over the rev limit despite the spark cutting. In the same manner that you can over rev the engine by changing into a lower gear too early. Link to comment Share on other sites More sharing options...
aerobod - near CYYC Posted February 2, 2023 Share Posted February 2, 2023 Assuming there isn't a mechanical downshift to another gear, momentum of the mechanical components of the engine will delay the revs dropping, but will not cause any increase in revs without a source of fuel and ignition. Link to comment Share on other sites More sharing options...
John Vine Posted February 3, 2023 Share Posted February 3, 2023 #17: That's a good example of the First Law of Thermodynamics (or, at the very least, the law of Conservation of Energy). JV Link to comment Share on other sites More sharing options...
Gridgway Posted February 6, 2023 Share Posted February 6, 2023 #16 to be pedantic, acceleration has no momentum. The rate you reduce the force is the rate that acceleration decreases.The effect of revs going higher "at the limit" will be due to the capabilities of the rev limiter to reduce the force (from the bangs) to zero at the right point quickly enough. I think that most limiters are very good at that, although some employ a soft cutting regime. Link to comment Share on other sites More sharing options...
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