Mad-Max

oh wicked i was looking at them to start with but i thought they were only for dizzys lol the more info the better haha i couldnt find out much about them when i looked

so it wont work with a cas sensor and wasted spark setup? a non turbo rb30/25 vct hybrid

oh wow thats good ...do they run ok with a cas? and can they be used with a knock sensor or is aknock sensor a bit obsolete with these?

yea ive seen this units used befor but i have little knowledge about them are they easily tuned and what can be done with them?? how are they tuned?? ahh good yea a map sensor i thought about that didnt think id need to use one tho.... and the megasquirt unit was what i was lookin at ealier --> ( http://www.trademe.co.nz/Browse/Listing.aspx?id=321916315 ). its compatable with knock sensor (which i want to run) and map sensor plus i like the fact i can plug it into a laptop and have a fiddle and since im using a series 2 vct head that would be very handy for controlling it the other one i had a glance at was the silicone chip kitset from JayCar but i thought it might be a bit sketchy any thoughts/ideas much apprieciated guys

thanx very much for that answers it exactly for me .... im just sortin out what options i have .... im currently lookin at another option of a standalone ignition system that can be pre programmed ect and programmed via a hand held/fixed controler either that or a re-programmed eprom. if any one can think of any options i could use keeping in mind i only want it for the ignition and not the fuel ... fuel is only a bonus

and why not???????? id like some one to elaborate on this for me pls .... that doesnt really answer my question, try and think outside the box on this one.... i know the cas tells the ecu where each piston is in the cycle... inturn this signal that is sent to the ecu and lets the ecu know the rpm. and if the rpm of the engine determines the level of timing advance why would it need a afm/tps sensor to advance the timing surely it would have a base timing map it works from? i always thought an afm/tps was more for the fuel side of things and only had a very slightly small impact on the timing i know for a fact that with no afm and tps an rb25 will still idle with only a cas sensor and maintain base timing. trust me ive tryed but what i couldnt do was rev the engine and gauge the timing advance at the time

ok forget about the fuel side of things and forget about the temp/knock sensors for a few mins here. i understand how they effect the timing when they need to basically what im wanting to know is if the stock r32 ecu can work as a stand alone ignition system (only ignition) when only using the cas input to the ecu. will it still advance the timing when rpm's are in play without those sensors (no afm, no tps)

ok guys im looking for an ecu expert (or at least some one who can answer my question) for a bit of help with a project im considering to build. what im wanting to know is how a stock ecu determines the timing advance on a rb20de/25de r32 ecu. what sensors determines this or is it just the cas sensor?

he probably didnt reset his ecu after he put it on so it would have takin a lil while for the ecu to change its settings in my opinion a 2.5 is about as big as you really wanna go. you can go bigger but theres not much point! it will give a nice top end over the 2.25 which is still nice in its own way and will still peform just make sure its done with mandrel bends which arnt much more expensive (that includes on a 2.5" exhaust). and dont be a dick and try and make it as loud as possible, have some respect for others and families (plus less attention from cops)

well im no turbo expert but from what i can see it very much sounds like a fueling issue.... if your gap/spark is fine with no missing id be looking at the fueling system as its sounds like the sards have a bit of a problem with atomisation and 800cc sounds pretty huge to me. have you/the tuner been able to lean this out at all?? could be that the injectors are too big one good way to check the spark is to either unbolt or get another cas and spin it with the plugs out earthed to the engine and have a look for yourself.... this gives you the chance to sort this issue out i know how much of a bastard it can be! id say 1.0 gap or .09 should be fine tho.

start with a couple basic things and see if these help. ive bought cars with the same problem and its always been something simple like this..... try changing the air filter sounds like it could be hunting for air (or remove the air filter to see if that makes a difference) check your spark plugs they could just be dirty or faulty also try some injector clean fuel treatment sometimes that helps and check for vacuum leaks

oh wow that would have been cool would be very interesting to see how it came along

yea it probably is but it worked for me its just as good on gas as it was injected untill the foot goes down and my carb manifold is a stock rb30S manifold ($100) with a $50 webber (which im upgrading as we speek to a 40mm down draft from a 3l v6 capri/granada another $50) if i wanted to make another manifold it would only cost me materials since i have all the gear i need to do pretty much what i want. dont you wish you had a shed like mine?? hmmm i think all up to do it it ows me $300 and i get the tuning done properly for free from a good qualified friend of mine seems to me that you guys in reality only know skylines and havnt really tryed anything that isnt a cookie cutter maybe your to scared to try anything different i dont know oh and we dont have emissions problems or p plates im from nz we can have shit sticking out of our bonnets ect (dumb aussie laws thats where you guys fail tryna do shit to the book) like i said i didnt change it to carb'd to get any performance out of it i did it for shits and giggles so unless youve owned a carbed rb just stfu ay! like i said earlier theres alot that can be done its just a matter of filtering out what you wanna do from everyones advice given maybe my advice isnt good, if you dont think it is then dont reply but im only speeking from experience of what ive done and has worked for me

thanx but if mad082 and turboX-trail wernt so abrasive with there posts i wouldnt have had to say what i said... i thought they'ed be more interested in helping people out rather than trying to tear apart others posts and critisize. obviously they dont comprehend the concept of how to do that or how to give good advice. from a new members point of view there actions makes this whole site seem like a joke since i didnt register to this site to make friends just to help out if i can and to see what others are doin to there cars. oh and btw over here in nz we dont have p-plates so we dont have to worry too much about what can and cant be done to ours cars so godzilla-32 pretty much has free reign on what he can do i dont quite get what you mean there .... basically your only tricking the ecu into thinking its still using a normal amount of gas when its not, so lets say you have a pipe with a tap and that tap opens for 5 secs and closes for 5 secs. if that tap has more pressure behind it its goin to release more liquid everytime that tap opens.its pretty crude but i hope that helps explain it

firstly im not your f**kin BRO secondly all book smarts and no practical ay.... hows your uni goin are you failing or something?? another 19yr old no it all..... you see the thing is i dont think you really no squat. you may have the book smarts and be doin a uni degree in automotive engineering but id really like to know how many n/a engines youve built?? i cant count on both hands and feet how many ive built with good success so lets break this down for you into english 1. my 290* lumpy cam was made specifically to run a carb and runs fine!! so how the f**k would you know if it makes it run worse? ....because the intake valves open so early it breaks vacuum and would f**k with the afm too much so inturn wouldnt run with a factory ecu no matter how hard you try. if i wanted it to run injected with this cam id have to go and spend alot of $$$$ on a link ecu or simmaller and many hours of tuning on a dyno ect so its not even worth it youd be better off just getting another tryed and tru good cam and be happy with that. oh and compared to the 2x other cams ive used (stock, the bros custom injected cam) on the carb its the f**kin ducks nutts!! 2. do i really need to say it?? ive drivin plenty of turbos mate you honestly have no idea what ive driven/owned and personally cant wait to rape the shit out of my mates 402 turbo eh holden when hes finished it (comming very soon), so stick with your moms modded xtrail 3. yes ive f**kin heard of them they could also be used but how much would you end up spending on one? series 2 vct heads are cheap thats half the reason i said it so what are you a f**kin moron this guys not gonna spend mega bucks on a gtr head, im just sayin he shouldnt f**k with the stock r32 small port shitters if hes thinkin of modding the head 4. it wont make a diff till youve opened up (removed restrictions) on the engine.... why else have there been other n/a rb's that have used em or a second throttle body for that matter. 5. blah blah blah ... thats why you go see a tuner to finish it off 6. bullshit.... yea it maybe crude but it works and doesnt need to be permanent! ... yea i know what injector pulse width is 7. lighter cams if you wanna be technical it should have been cam gears and that helps with response you should know this 8. oh yes it does and you should know this if your doin a degree.... a 350cfm holley on a v8 is ok for cruising and economy but good luck being able to rev that sucker with out leaning it out up top! put a 750cfm holley or simmaller on the same engine and hey presto now you can rev the beast right out!! heres some simple maths for you which youve probably covered at uni plus this is just a guide to work out how much cfm an engine needs for selecting a carb... http://www.ehow.com/how_5488366_choose-carburetor.html and wtf are you stupid or some fin?? rev limiter speeks for its self! omg i dont even know where to start with this one. ohhh im gonna remove my rev limit now i can rev 10k rpm, WRONG sure you can in theory rev over what was once the "rev limit" but valve springs with help stop valve bouncing and improve harmonics in the top end on the head only. obviously you will still need to do more work to stop wear and tear to improve the engines life span. restrict your airflow and i doubt youll even get be able to get decent revs. maybe the bigger throttle body will help to achieve higher rpm dont you think? but in reality 7.5k rpm max is fine for the rb this guy wants 9. i was only using cfm rates and carbs as an example...... oh and like i said dont knock it till youve tryed it. i know its old technology im not stupid and i did it for a laugh but personally i like the benifits i got out of it so untill youve done it how would you even know the difference on an rb engine? and why on earth would people rip the injection of 4ages and replace it with twin sidedrafts if it was that bad?? when it was injected sure it was a bit better but it really comes down to how you drive it. injected is much better for f**kwits that have just got there liscence (like you id say) but the skill involved with driving it now means being in the right revv range, clutch kicking more often an shit ect ect blah blah blah (do i really need to go on?) and its quite funny that the stock carb'd r31's from south africa produce more power standard than a stock rb30e (if you bother to look up the stats). so unless youve got some thing decent to say to help this guy/others out i dont really care what you have to say, stick with driving your mum's xtrail and next time read between the lines and dont try point out useless bullshit.... heck maybe go and get some practical skills and try somefin different. cookie cutters are old news and every one with a bit of knowledge should know how to do them, go an try something different!! i was gonna save this for my 350 chev sunbird but i could go ahead an use one side of my suck through setup, 650cfm demon carb and adapter for the sc14 charger thats in the shed and slap that puppy on my rb30 just to see how it goes for shits an giggles, which id say would perform nicely and none of you f**kers have ever done that or even atempted to do anything of the sort....so next time befor you decide to pick out bullshit and state half assed logic just think to your self "maybe this guys tryed a few things i havnt, how did he do it, and what was it like??"... you never no you might even learn something from it