dude Posted August 8, 2004 Share Posted August 8, 2004 I have a MINES ecu and i need to remove the rev limiter , its stock based , does anyone know of an electrical whiz that could do this , the current limiter is 7400 rpm !!! Dude:flame Dev Link to comment Share on other sites More sharing options...
TLicense Posted August 8, 2004 Share Posted August 8, 2004 See if you'd gone for the AEM, you could set the rev limit to whatever you liked.... OK so nobody can tune the damned thing yet (save pete betts), and it would make changing gear on the auto's a bit tricky, and may be responsible for blowing at least one engine, but rev limits, not a problem! Basically, I think you're going to struggle, because the ecu needs to know what the revs are to relate back to the fuel/ignition maps, so clamping the rev signal going into the ecu is going to mean you'll only get fuel/ignition up to whatever you clamp the signal to. I don't think it's possible to re-programme the mines ecu is it? (I'll stop teaching granny to suck eggs now...) Having said that, aren't there piggy back boxes available that claim to be able to alter the rev limit? What are you thinking, larger turbo but higher rev limit, and just drive it higher up in the rev range? Could be cool! Link to comment Share on other sites More sharing options...
Nic Posted August 8, 2004 Share Posted August 8, 2004 Dude, mvpmotorsports have the 'Phillip Long 2 Step Rev Limiter Kit' on their website, it doesn't say if it can raise the stock rpm limit but might be worth contacting Dusty about what it can do. http://www.mvpmotorsports.com/Templates/frmTemplateH.asp?SubFolderID=203&SearchYN=N Link to comment Share on other sites More sharing options...
Nic Posted August 8, 2004 Share Posted August 8, 2004 Also have a look at this website they seem to do various products that may be able to help http://www.msdignition.com/ Link to comment Share on other sites More sharing options...
TLicense Posted August 8, 2004 Share Posted August 8, 2004 Nic, I think those products only give you a 2 step rev limit. This means when you put the clutch in, or hold down a button (or any switch for that matter) the rev limit will be whatever you set it to, say 4000 rpm. Then when you let go of the button the reve limite returns back to whatever the main rev limit is. Basically used as a form of launch control. (Plus it means you can build boost without actually moving - if somone can explain how that happens I'd be much obliged!) Having had a think about this, I really can't see anyway around not re-programming the ecu in some way, whether that be sending the ecu to be re-programmed, or having a piggy back ecu that gives you fuel and ignition maps above whatever the mines ecu limit is (I was going to suggest something like a Dastek pggy back, but I don't think you can raise the rev limit on that either, as all it does is modifies the outputs from the ecu by +/- x%. Once you go above the programmed map and get zero output +/- X% = zero, so still no use) The problem is that I doubt very much that mines worked out fuel/ignition maps to say 10K RPM, when they were going to set a rev limit of 7,400. Maybe they did, don't know.... Link to comment Share on other sites More sharing options...
Nic Posted August 8, 2004 Share Posted August 8, 2004 I was searching for info on the Mines ECU and found this UK company they say that "Programming can be continuously updated as more tuning is carried out." http://www.prospec-ms.co.uk/merchandise/mines_vxrom.html Might be worth contacting them to see if the Mines ECU can be reprogrammed to raise the rev limit. Link to comment Share on other sites More sharing options...
TLicense Posted August 8, 2004 Share Posted August 8, 2004 Ideal Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 8, 2004 Share Posted August 8, 2004 what is a safe rev limit for stock internals 8000? you have the upgraded springs and retainers what can you rev to with them in place. looks like a standalone ecu will come into its own for tuning. do any of the other single turbos run higher rev limits. is it because you running out of revs going down the 1/4 does it bounce off rev limit with been a mid size turbo in that vid you seem to launch well with no wheel spin. Link to comment Share on other sites More sharing options...
dude Posted August 8, 2004 Author Share Posted August 8, 2004 I need to rev the car higher in third to avoid having to change into o/d before the line . Dude:flame Dev Link to comment Share on other sites More sharing options...
Miguel Posted August 8, 2004 Share Posted August 8, 2004 ProSpec are Mines dealers in the UK it might be worth having a word with them? Sorry someone has allready said this:stupid: ill shut up now Link to comment Share on other sites More sharing options...
dude Posted August 8, 2004 Author Share Posted August 8, 2004 Originally posted by migster ProSpec are Mines dealers in the UK it might be worth having a word with them? Sorry someone has allready said this:stupid: ill shut up now ProSpec wont work on any Mines product they havent supplied , pants isnt it !!! Dude:flame Dev Link to comment Share on other sites More sharing options...
Miguel Posted August 8, 2004 Share Posted August 8, 2004 Yup thats a bummer. Well then lad it's learn jap time and contact http://www.mines-wave.com Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 8, 2004 Share Posted August 8, 2004 Alternatively, get a manual diff and leave the rev limit where it is... Link to comment Share on other sites More sharing options...
TLicense Posted August 8, 2004 Share Posted August 8, 2004 Originally posted by Matt Harwood Alternatively, get a manual diff and leave the rev limit where it is... But then your sacrificing acceleration for longer gearing... Link to comment Share on other sites More sharing options...
Matt Harwood Posted August 8, 2004 Share Posted August 8, 2004 With the amount of hp Johns car can produce, it would probably aid acceleration... Especially as he can then do the full quater mile without needing to change into 4th or pushing the engine outside its efficient powerband Link to comment Share on other sites More sharing options...
dude Posted August 8, 2004 Author Share Posted August 8, 2004 Its gonna be interesting Mr Mole , im gonna do a test and tune day at the Pod along with Tango man, i'll prob try the manual gearing as well as a few other tricks and then get CJ's car running as fast as poss . Dude:flame Dev Link to comment Share on other sites More sharing options...
TLicense Posted August 8, 2004 Share Posted August 8, 2004 Originally posted by dude Its gonna be interesting Mr Mole , im gonna do a test and tune day at the Pod along with Tango man, i'll prob try the manual gearing as well as a few other tricks and then get CJ's car running as fast as poss . Dude:flame Dev Hmmm good idea. If it were me I would want to do three runs. The first would be as the current set-up. The second would be raised rev limit, with current gearing. The third would be with manual gearing. In fact I'd probably do three of each run and then take an average time. Really it depends on how much your going into OD. If it's more than a couple of hundred RPM (Say 500) then you're going to struggle to get that back by changing the diff alone I would have thought. I agree with Matt about longer gearing helping traction, although with regards to engine efficiency ranges, I would have thought that would simply depend on the size of turbo with as large as possible (and hence higher RPM's to solve the spooling problem, and the fact it's going to want to make peak power later on) would be the order of the day. I guess it really depends on your set-up, which I must admit despite all the recent hype, (deserved as it is!) I know very little about. I would love to see a really good back to back of all these. Nice and scientific like Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 11, 2004 Share Posted August 11, 2004 Now me and electronics don't get on but could you not clamp the reading the ECU sees, similar to the FCD principal? Link to comment Share on other sites More sharing options...
TLicense Posted August 11, 2004 Share Posted August 11, 2004 Originally posted by Terry S Now me and electronics don't get on but could you not clamp the reading the ECU sees, similar to the FCD principal? Unfortunately not, as the ecu needs to know what rev's the engine is doing to work out where it is in the fuel map. Errm imagine it like a table, with revs going along the bottom and boost going along the side. The values in the table are injector duty amounts. So at 2000 rpm, and 0.5 bar boost you would need 20% duty cycle. If you go up to 8000 rpm, but the most the ecu ever sees is 5000 rpm (because you've clamped it to this figure), it will only ever give you the fuel for 5000 rpm. Hence why if you want to do this you'll need to get an aftermarket programmable ecu. (Whether that is programmed by you or somone else. I don't think any piggy back's are capable of creating fuel maps beyond what exists, as they only mod existing maps) Hope that helps. Tony Link to comment Share on other sites More sharing options...
Alex Posted August 11, 2004 Share Posted August 11, 2004 How about a custom Diff from Quaife? They could do any gear ratio's you wanted... Also on the Quaife website is a gearing calculator which will help to decide what gearing is best for the powerband you're running. Otherwise....I would have thought it was time to bin the stock type ECU...I thought Matt managed 8000 rpm on his Mines? I know I managed 7,500 (on the dial might not have neen true speed) Link to comment Share on other sites More sharing options...
matt Posted August 11, 2004 Share Posted August 11, 2004 I'm pretty sure Terry knows that ..............Is it not a case of clamping the signal at 74** rpm and then just reving 500rpm or so more to get across the line? Obviously the ecu will be providing only fuel for the 7*** clamped signal. Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 11, 2004 Share Posted August 11, 2004 Originally posted by matt I'm pretty sure Terry knows that ..............Is it not a case of clamping the signal at 74** rpm and then just reving 500rpm or so more to get across the line? Obviously the ecu will be providing only fuel for the 7*** clamped signal. Thanks Matt, c'mon Tony! Clamp it at the stock limit. It won't be mapped past there anyway it will only use the fuel settings at the stock limit. Link to comment Share on other sites More sharing options...
TLicense Posted August 11, 2004 Share Posted August 11, 2004 Look I like teaching my Granny to suck eggs. Link to comment Share on other sites More sharing options...
TLicense Posted August 11, 2004 Share Posted August 11, 2004 However, my point is still valid. The difference in duty cycle from 7500 RPM's to 8000 RPM's will be a lot more than you'd want it to be. Can't remember exactly but I think the last 500 RPM on my fuel map sees the duty increase from 95 to over 100% (Not to worry as my rev limiter is set way lower than that anyway!) What I'm saying, is you'd run 'orribly lean, at a point where you're at high boost AND high revs. I know my puny 440's will porbably be running a lot leaner than whatever gargantuam injectors john will be running, but he's going to be needing that fuel a lot more than I would. I suppose if money was no object, then that would indeed be the way to go, letting the engie let go as you charge over the line. Link to comment Share on other sites More sharing options...
matt Posted August 11, 2004 Share Posted August 11, 2004 Originally posted by dude and then get CJ's car running as fast as poss . Dude:flame Dev You!? In somebody elses car!?With your reputation!? /Fast Show mode off/ Link to comment Share on other sites More sharing options...
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