rob82

Its definately PWM - there is only 2 wires!!! None of the nissans including ca,sr,rb,vg use stepper motors. If your using an M800 turn off all the PI control as it doesn't work for shit.

I'm running 9:1 comp on my rb30/26 with std cams and twins-5's and seeing about 14deg timing at peak torque at 12Psi of boost on pump. So by the time I get 20 psi of boost into the thing I think my peak torque timing numbers will be around 8degrees which will be close to the edge on pump. However the gains in using higher octane fuel will be huge! I think with bigish cams (270 and 10.5mm lift) you could get 10:1 comp in fairly safely. Remeber the bore/stroke ratio of the 30 doens't lend it self to high compression in comparison to the 26 and 25.

I've got no problem with either ECU as both if tuned properly will deliver the same power and drivability. Dont let the knock control of the std ECU sway your judgement as from what I've seen it doesn't work very well at all. Thats why I'm thinking a Speed Density Visteon ECU with two knock sensors is what I will use if I ditched the std ECU.

That means absolutely f**k all!!! Most rotories dont care about accurate ignition control (why do you think the microtechs are on all the fully sik rotors?). There isn't an ecu on the market that couldn't run a rotory drag car. As has been already said there is alot more to engine control operation than just full throttle and thats the bit I care mot about. Haltechs are hit and miss - some work ok the others have issues.

Turbosmart = Junk!!! Sell it and buy something decent!!

Std Subaru Sti injectors are 550cc @3bar (they are pink) they will drop straight in. This is an OEM part - so really really good spray pattern and low frequency control. There are a few companies that high flow them to 650cc @3bar which I've used on a couple of WRX's and they were very nice to tune on the factory ECU. PS the EV6(xr6 turbo injector style) and EV14(LS2) are 14mm compared to the 11mm denso parts used in the subarus and other denso based ECU's. PPS 550cc injectors should support around 330-340rwkw.

Hey there is nothing wrong with that, the standard ECU/injectors are good for 280-290rwkw.

About 340rwkw on std pressure using BSFC = 0.6(which is about what I've found). BTW I've made just over 600rwhp on E85 using 60LB/hr(630cc/min) with 4Bar base pressure on an XR6T which confirms my BSFC calc of 0.6.

Fantastic ECU - like other ECU's has had problem with the factory crank angle sensor - however the latest firmware should have fixed it. Talk to SAS(Silverwater Automotive Service) about how crank input setup should be configured.

Siemens Dekka are doing a 750cc injector in the EV6 style with mutli orifice - ok dynamic flow rates. I think its just the highflow 60Lb siemens dekka injector. These are high impedance injectors they should be good compared to alot of other injectos out there.

[quote name='URAS' date='24 Jun 2009, 12:28 AM' post='4675229 doing a fair few fully variable cam setups soon, Evo IX, SR20VE headed monster so i will let you know how it goes with cam control, so far the only other ecu ive done on similar setups was autronic and greddy v-manage (the later was suprisingly good on an evo 8) The software is carried over from LINK's previous G3 range of ecu's, its actually quite nice to use, no-where near as cumbersome as motecs. I probably tune on average 5 different types of ecu each week and remmbering hotkeys is a nightmare. I tune lots of factory systems and aftermarket systems. From what I've seen the Autronic SM4 is the closest thing to factory level managment with an interface that is simple and quick to tune with. You can frig around with motecs to get them somewhere but they are missing silly things like delta ignition control (can be setup using rpm as an axis but its not a delta number from the desired idle speed) and their PI control is shit not to mention so slow to tune. At a glance the Link looks similar to the autronic but the interface is where it may fall over even if they tune ok. Does the link use the desired AFR map as an enrichment map like the autronic does and then you just tune the VE? And is there a charge air temp cal?

No offence but has the VIpec been tested with a new engine configuration - as in mutiple cam control, DBW control, knock sensor retard functions? This is one area where all aftermarket ECU's seem to fall over. I'm yet to see an aftermarket ECU control Cams better than the factory ECU in almost all applications let alone DBW control - f**k me, most even struggle with stepper motor control! You would think by now that most aftermarket ecu's would be at least able to deliver consistant injector and ignition control -but I've seen issues with all the big name ECU's - including Haltech, Motec and Autronic!! On a side note I had a look at the Vipec interface - looks rather clumbsy! Was it copied from Motec?

I could almost guarantee you that any location on the intake side of the block will work to the degree thats required for the factory ecu or PFC. I have played extensively with knock sensor location on EJ25 block as I was experiencing spurious knock at a particular load and rpm point and found that moving the location of the sensor didn't help at all. Subarus are much more particluar with knock snesitvity than most other cars as they learn both advance and retard ignition.

The factory ECU will not retard the timing if it sensors detonation. From what I have seen it will switch between high and low octane maps based on knock feedback at low rpm high load. If it changes from high to low and it still continues to detonate there is nothing it will do to stop it. So in a sense they do f**k all.

Haltech lost it when they went to windows - Long live the DOS haltech's - at least they work!!

Splitfires - with 2 dumb bosch modules (203 - I think - not sure on motec crap) - motec doing dwell control.

Half way doen the block is fine - thats where mine are!! They do f**k all anyways.

That fuel system is massively overkill - thats enough fuel flow and injector for 700rwkw using BSFC of about 0.55 (Which should be close enough for pump fuel)!!! Thats a safety factory of about %75.

What fuel??? I would've thought that 2.5 bar even on race fuel would be pushing shit up a hill. I've seen around 370rwkw with the -5 on about 25psi of boost on a tired race engine RB26 on pump98. I would like to think that you might see around 420rwkw with race fuel tho.

There is two mounting points on the intake side of the engine - from memory the one of them is drilled tapped while teh other is just drilled. I just screwed my other knock sensor near the oil pan. Works fine - as much as the std ecu knock control works anyway.

I've got the same issue - its a catalyist light up function I think. If you log the ignition timing you'll see that it runs alot less timing than what it runs when its up to temperature. The only other thing it could be is a nuetral switch not working.

There is so much more to injector selection than just simple 100% duty flow rates. What about spary patterns(delta and alpha angle), operating pressures, dynamic flow rates at small duty cycles and differing frequencies, flow differntials due to injector temperatures. I know that Richard Aubet (Autronic) will not enough support the Sard 800cc side feed injectors due to its massive change in flow w.r.t temperature. From what I've seen in tuning the std nissan ecu's (with their proper current controlled injector drivers) is that the nismo injectors are about the only injectors I would use.

Ha ha so true. The buick V6 is one of the worst engines ever made its with the likes of the rover V8(however its heavy and can be used as a boat anchor).

Get rid of the turbosmart fuel pressure regulator - that are shit!!

2x 044 pumps running continuously on a street car is a dumb idea. First off there are very few regulators that will return enough fuel back to the tank without causing a restiction; hence increasing fuel pressure. Then there is the additional heating of the fuel. If you must have a surge tank than at least switch one of the pumps on when you think it will be needed but dont forget to put a oneway vavle in front of both pumps. Ohh 044 as a lift pumps is shit idea - dont care who said it.