V7 SLR Posted February 20, 2003 Share Posted February 20, 2003 I'm not available Friday (work) but I'll be at home on Saturday. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 20, 2003 Leadership Team Share Posted February 20, 2003 Does anybody have a suitable map for a non-modified 1800 Supersport running on KV6 TBs, with or without IACV? I'm currently finding the most successful map supplied with the Emerald to be J3.fig (Jonnty Lyons map) but I'm sure this must be running a little rich? An additional problem is keeping the idle high enough whilst cold - I have the IACV presently locked in the closed position - this map doesn't feature IACV. Also, what is the correct mspb figure for standard 1800 (straw) injectors - I mistakedly managed to wipe clean the ecu configuration whilst "playing" ? Stu. Link to comment Share on other sites More sharing options...
oilyhands Posted February 20, 2003 Share Posted February 20, 2003 Johntys original map is for a 1600.. MSPB vaue.. 61 I may have a map for a SS on TBs.. mail me off blat. Open the IACV a little in the live adjustments page by using pg/up in manual control mode and then disconnect it, then use igntion advance to control idle, put 0 in the igntion map at idle, then the ECU will use the appropriate amount of advance, more when cold, less when hot. Gary, if the porting is OK.. 180BHP Mav, someone has just cancelled so I may have. Oily Edited by - oilyhands on 20 Feb 2003 18:35:14 Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 20, 2003 Leadership Team Share Posted February 20, 2003 Dave, following on from a previous mailing to yourself, it may be possible for myself and Mav to come down together? What do you think Mav? What date are you available Dave? Stu. Link to comment Share on other sites More sharing options...
oilyhands Posted February 20, 2003 Share Posted February 20, 2003 Its probable that it will be week beginning 12th March, but I cant be sure its available yet. Oily Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 20, 2003 Leadership Team Share Posted February 20, 2003 Just been mailing you direct whilst you're blat chatting!!!!!! When / if it's available - book us in. I'm sure Mav will be on for that. Stu. Link to comment Share on other sites More sharing options...
Steve-B Posted February 21, 2003 Author Share Posted February 21, 2003 for the latest on my quest to up the performance here on ChitChat what do i do with the vacuum hose that went to the MEMS 🤔 off to pub now ❗ Steve Metalic Black SV-VHPD click here to see our pictures.... Edited by - w1scb on 21 Feb 2003 18:42:25 Link to comment Share on other sites More sharing options...
mav Posted February 21, 2003 Share Posted February 21, 2003 Oily, YHM Link to comment Share on other sites More sharing options...
Steve-B Posted February 22, 2003 Author Share Posted February 22, 2003 well it's installed and working now. loaded V7's VHPD map. niggling things: M3DK into an SV must be mounted at a 45 degree angle flat to use existing MEMS holes. looks a bit odd but seems very sturdy . it needs a wire run from radiator switch to it to turn on fan. fan wires hard together just now to keep temperature down, thanks to V7 for this hint.. need to play with cold starting maps a bit. not today ... SIGNIFICANT power / smoothness in VHPD now... ...not that police officer didn't notice it when he pulled me over on M40 but he didn't give me a ticket .... Steve Metalic Black SV-VHPD click here to see our pictures.... Link to comment Share on other sites More sharing options...
oilyhands Posted February 22, 2003 Share Posted February 22, 2003 Be careful running the fan wire direct to the ECU, the switched earth provided is only very low current and designed to switch a relay not a device like a fan that has a heavy current draw, you risk damage to the ECU. Best solution is to use a simple relay, put the two connectors from the thermo switch on the main relay connectors, bridge the power wire to the switch power connector on the relay and run a wire from the ECU to the earth side of the relay switch circuit, then the ECU just switches the relay, same number of wires, but much safer. Mount the realy on the expansion bottle mount bolt. Oily Link to comment Share on other sites More sharing options...
V7 SLR Posted February 23, 2003 Share Posted February 23, 2003 There's a spare... er... space in the fuse box for one more relay. It would be a bit of a faff to get to but I managed as I had the scuttle off at the time. It makes it easier to pick up a high current switched or permanent live from there too. I've tested mine and it works. So I know what I'm talking about... for once. 😬 Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 23, 2003 Leadership Team Share Posted February 23, 2003 Re the vacuum hose - with the TBs and the mems installation, the small hose runs from the fuel rail, is connected to each of the TBs, then via a fuel trap to the mems. The Emerald does not have facility for the vacuum hose, therefore you can leave out the long section of hose and the fuel trap. Remove the plastic T-piece feeding the hose into the TB to cylinder no.4 and feed the hose directly in from the T-piece feeding no.3, you may need to use a slightly longer piece - use a section of the excess hose you have. Does this make sense? Stu. Link to comment Share on other sites More sharing options...
V7 SLR Posted February 24, 2003 Share Posted February 24, 2003 Stu, it's not needed. The hose described gives you a little higher fuel pressure when you open the throttle quickly, often termed "acceleration fuelling/enrichment". The M3DK has this built in as a function and reads the speed of throttle opening via the throttle position sensor. The MEMS used the vacuum for its MAP sensor. When I moved to M3DK with my original SLR throttle bodies, I took all the hoses off, left the top of the fuel pressure regulator unterminated and drilled/tapped some grub srews into the holes left by the hose nipples on the TB's. Worcs L7 club joint AO.//Membership No. 4379//Azure Blue SLR No. 0077//Se7ens List Tours Link to comment Share on other sites More sharing options...
Leadership Team SLR No.77 Posted February 24, 2003 Leadership Team Share Posted February 24, 2003 Nigel - lot of work compared to snipping a bit of pipe to feed the regulator to the 4 TBs and not beyond Unless you were bored that day? Stu. Link to comment Share on other sites More sharing options...
Peter Carmichael Posted February 24, 2003 Share Posted February 24, 2003 Extra complexity. Feeding the FPR a vacuum signal is kinda useful because, when the fuel injectors squirt fuel into a partial vacuum, the deeper the vacuum the deeper the effective pressure of the fuel rail. This means that at idle you can get better granularity of injector opening and your injectors get full capacity when they need it at WOT. However... The However is quite an important However. The vacuum was an inadequate way of sensing throttle opening, because the cam profiles are sufficiently wild to cause significant inlet tract pressure pulses. Why on earth would you want to feed part of your fuelling control system a wildly fluctuating pressure input. The truth of the matter is that you get better fuelling if you ignore vacuum altogther. Discuss... Link to comment Share on other sites More sharing options...
kjp Posted February 24, 2003 Share Posted February 24, 2003 I think pressure pulses with standard cam will be equally as bad, truth is the 'system' (plenum, pipe sensor dynamics) integrate the pressure signal and the EMS will have further input hardware/software conditioning to ensure that the signal does not vary wildley. The 'system' may not work so well once the plenum has been removed and repalced with thorttle bodies but the other components could be tuned to make it work properly once again. I would much rather have a properly conditioned manifold pressure signal prediciting mass air flow than throttle position. further discuss... KenP Link to comment Share on other sites More sharing options...
mav Posted February 24, 2003 Share Posted February 24, 2003 Not too bothered about TBs at present as mine will be fitted with the standard Plenum in place, and a set of verniers for now......... Steve, how do you mean to fit at 45 deg on the SV? Link to comment Share on other sites More sharing options...
oilyhands Posted February 24, 2003 Share Posted February 24, 2003 Experience of many mapped systems which use MAP to sense load shows that anything other than the mildest cams leads to erratic idle and progression and poor throttle response regardless of whether implemented via a plenum or TBs Simply replacing the system with an Alpha-n type suitably mapped using TPS transforms the idle, progression and throttle response. Oily Link to comment Share on other sites More sharing options...
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