Alex Posted May 8, 2003 Share Posted May 8, 2003 ooh-er-missus... I just "happened" hit 7,400rpm this morning (low throttle load just held open too long!) I was waiting...and waiting for the rev limiter to cut in, but it didn't and I wimped out. I've got a MINES ECU. This "must" be the reson why I can clear 7,000rpm, just starting to wonder if a) other owners of my car have "used" the extra rpm b) whether there is a rev limit c) have I just fooked the engine d) has anyone else found a rev limit? I just want to re-affirm that there is a stock rev limiter and that I'm not looking for something that is not there to be found. Right...I'm off to think about upgrading the valve springs etc and the fueling to handle 7,500rpm Cheers Quote Link to comment Share on other sites More sharing options...
eyefi Posted May 8, 2003 Share Posted May 8, 2003 a. probably b. yes there will be, probably just beyond where u got to. c. does it still work or feel any different? i doubt u have. just dont hold it there for long. d. ive hit stock rev limit and my current car limits at just beyond 7500 rpm. Quote Link to comment Share on other sites More sharing options...
Thor Posted May 8, 2003 Share Posted May 8, 2003 Alex, I am sure Nick Phelps' old one with a Mines ECU used to rev to 8K regularly. I am sure your car is OK. I wouldn't keep it up there for too long as it seems to be a source of FMS failure. Enjoy. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted May 8, 2003 Share Posted May 8, 2003 8k sounds too high for a stock bottom end on such a long stroke engine. Skylines are safe to 8750, but are much shorter stroke. Quote Link to comment Share on other sites More sharing options...
Thor Posted May 8, 2003 Share Posted May 8, 2003 I agree, but someone needs to tell Mines! Quote Link to comment Share on other sites More sharing options...
TOKYO Posted May 8, 2003 Share Posted May 8, 2003 9500rpm the other day not knowing I didn't have a bloody rev limiter. Cannot, will not, don't want to drive me car hard without one. Bought the best engine safety device their is after oil . Glen Quote Link to comment Share on other sites More sharing options...
Alex Posted May 8, 2003 Author Share Posted May 8, 2003 So how far can I rev it - for short periods of time (say whilst running a 1/4) I do have mechanical sympathy, but not having to change into 5th at the end of the strip could save me time. I FULLY RECOGNISE THE STOCK LIMITER WAS THERE FOR A REASON. But seeing as I don't have the stock limiter I need to know after which point to give myself a flogging. Also, what could I now do to safely hit the limiter? Full engine re-build (ie Alex give up now)? Stronger valve springs? Just remove weight from the Pistons and Conrods (I don't mean milling out great big chunks!!! Short stroke crank? ideas would be great....but I have a feeling I should give up now! Quote Link to comment Share on other sites More sharing options...
dude Posted May 8, 2003 Share Posted May 8, 2003 Alex IMO its prob right out of its power band at thosr revs and th eonly reasont to rev it that high is so it doesnt drop out of the power band/boost when you change gear , but there again turbo engines like to be loaded up so you may well be 'defeating the object' . I dont think mine goes past the stock redline with its MINES , but i'll have a go on the way to work if you want and report back . John:flame Dev Quote Link to comment Share on other sites More sharing options...
Thor Posted May 8, 2003 Share Posted May 8, 2003 Alex, I reckon 500 rpm over stock, so 7300 rpm. Glen - Flash Git! Quote Link to comment Share on other sites More sharing options...
GavinL Posted May 8, 2003 Share Posted May 8, 2003 Has anyone confirmed that their rev counter reads correctly? Quote Link to comment Share on other sites More sharing options...
lust2luv Posted May 9, 2003 Share Posted May 9, 2003 Originally posted by Alex Holdroyd So how far can I rev it - for short periods of time (say whilst running a 1/4) I do have mechanical sympathy, but not having to change into 5th at the end of the strip could save me time. 5th?! What sort of gearing do you have, I never even get out of 3rd! Quote Link to comment Share on other sites More sharing options...
Alex Posted May 9, 2003 Author Share Posted May 9, 2003 The gearing for the first 4 gears maybe shorter. I don't normally get out of 4th...but should I get more power on line it will be a close run thing. 7,300 rpm it is then, I know it's out of it's power band but its certainly better than having to lift of and change gear! Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 9, 2003 Share Posted May 9, 2003 Originally posted by Thor Alex, I reckon 500 rpm over stock, so 7300 rpm. Glen - Flash Git! My rev limiter kicks in at about 7100rpm? The rev counter is slightly inaccurate according to the Apexi unit, and the peak hold has shown 7090rpm after the rev limiter has kicked in (wheelspin in 2nd...) and I've ragged it to 7060rpm racing Angie up the Pod strip (and losing, sob, damn my lack of traction). So, on a j-spec 6spd, is that the stock rev limiter point or has something changed it....? -Ian Quote Link to comment Share on other sites More sharing options...
Thor Posted May 9, 2003 Share Posted May 9, 2003 I had this discussion with Matt. My Rev counter reads 300 rpm high approx. Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 9, 2003 Share Posted May 9, 2003 I see what you are saying, but these are readings from the Apexi unit, not the rev counter, and the rev counter reads over and above what the Apexi thingy is showing. I'm more inclined to trust a digital readout of a digital signal, especially as it's the expected 'slightly below the analogue' reading. Quote Link to comment Share on other sites More sharing options...
Thor Posted May 9, 2003 Share Posted May 9, 2003 Ian, not sure if that was directed at me. I do know the looking at a laptop & the Rev counter that there is a 300ish RPM discrepency. I am sure your digital readout is near enough spot on. Quote Link to comment Share on other sites More sharing options...
Ian C Posted May 9, 2003 Share Posted May 9, 2003 Originally posted by Thor Ian, not sure if that was directed at me. I do know the looking at a laptop & the Rev counter that there is a 300ish RPM discrepency. I am sure your digital readout is near enough spot on. Sorry, yes it was, Oh Large Hammered One I'm not big on the 'quote' thang. It was the maths involved - you told Alex that 500rpm more than stock was plausible, i.e. 7300rpm, which makes stock = 6800rpm, and your rev counter reads 300rpm over, which means stock shows 7100rpm on your rev counter at the limit, which is the rpm I gave for when my limiter kicks in, except I meant that the *digital* readout gives that (I have no idea what the rev counter is showing at the time). So I thought you were telling me "yes, you will see 7100rpm but in fact your limiter is kicking in at the stock value of 6800 because the rev counter overreads", so I laughably thought I would clarify where I got the reading from and how accurate it was before anyone got confused. not much chance of that happening, eh? :looney: -Ian Quote Link to comment Share on other sites More sharing options...
Thor Posted May 9, 2003 Share Posted May 9, 2003 Whatever you say mate:innocent: TFI Fiday:D Quote Link to comment Share on other sites More sharing options...
Rich J Posted May 11, 2003 Share Posted May 11, 2003 Originally posted by GavinL Has anyone confirmed that their rev counter reads correctly? Valid point, I wouldn't trust the standard rev counter on any car, mine often reads 400-500rpm over at 9000rpm, when the rev limiter is raised I expect it to see 10K (but only be doing 9500) Quote Link to comment Share on other sites More sharing options...
TOKYO Posted May 11, 2003 Share Posted May 11, 2003 Hi Thor. It may seem like that but I assure you NOT having a rev limiter is asking for trouble. Bit like not checking your oil regulary and having no EGT gauge. Just asking for trouble and I never found out it didn't have one still I sticked it the first time. No other way of knowing if you've got a limiter I suppose is their? See Ya. Glen Quote Link to comment Share on other sites More sharing options...
Thor Posted May 11, 2003 Share Posted May 11, 2003 Very True Glen. I would only use the extra revs on "special" occassions. What rev limiter are you using now? Quote Link to comment Share on other sites More sharing options...
TOKYO Posted May 11, 2003 Share Posted May 11, 2003 Until my new ECU turns up my rev limiter is my common sense and mechanical sympathy :D . Glen Quote Link to comment Share on other sites More sharing options...
Thor Posted May 11, 2003 Share Posted May 11, 2003 Originally posted by TOKYO Until my new ECU turns up my rev limiter is my common sense and mechanical sympathy :D . Glen I assume you are getting a Power FC, that seems to be what a lot of you big power boys are running. Quote Link to comment Share on other sites More sharing options...
TOKYO Posted May 12, 2003 Share Posted May 12, 2003 Big power boys, who me with me 80's Darrrrtsun . Glen Quote Link to comment Share on other sites More sharing options...
Thorin Posted May 12, 2003 Share Posted May 12, 2003 Motec then? Did you see Top Gear Glen? I'd recomend not parking your Datsun near any jet cars Quote Link to comment Share on other sites More sharing options...
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