Why when you can just buy OEM Rev-Up cams for ~$500 or copy-cat JWT cams off eBay for ~$600?

 

just so you can say that i have nismo cams and nismo vtc?

 

Help me come up with a good way to data log the pulse widths.
I don't think the EB data logs existing IPW with the SIM.



edit: Nevermind, I am going to solder two more connections on my custom harnesses here at workwhile I still have good light.

http://www.radioshack.com/family/ind...032058.2032231

274-232 <~ Main harness EB side
274-242 <~ Main harness ECU side

274-229 <~ Injector harness EB side
274-239 <~ Injector harness ECU side

 

SIM?

I haven't played with the EB, but I'd think you could use the CHA/CHB or at least just hook up two of the CH1-CH6 injector channels.

 

Sub Injector map.

Channel A and B. They don't monitor input though.

 

I know the EU can be configured to run channels A/B for an 8-cylinder and log each, not on the EB?

 

There is only one output per channel and it does not log anyhting that is already there as far as i know. It only logs what it puts out.

 

Hmmmmnnn....

They show the VH45DE and include the #1-#8 injector channels from the N-1 ECU diagram...WTH?

http://www.mohdparts.com/emanage/man...al_main/35.JPG
http://www.mohdparts.com/emanage/man...al_main/36.JPG

 

Matt,

Try changing your rotary selection to 8-0-0 for the VH45DE and I'm guessing CHA/CHB become injector 7 and injector 8. You'll also need to select the VH45DE engine type from the pull down menu under the Additional Injection Map.

Hopefully, you can then log IPW using the extra two channels for the VTC solenoids.

 

That is what I was about to look into. I just verified that the SIM doesn't show any IPW at the moment. I am using 7-0-0 which tells the EB I have a V6 with a Q45 MAF (instead of the normal 7-0-1). However even if I get the other two channels to show existing IPW it wont show for those two specific channels. The EB logs and shows the sum of all IPWs used on the AIM (additional injection map).

 

Just hook up those two channels and leave CH1-CH6 disconnected while logging VTC duty.

Why does the EB care about which model MAF you use other then what the max voltage is?

 

I am working on that already, hold your horses while I finish assembling the new connectors.
I had to stop by Radio Shack to get a couple more of them.

I am not sure. But if I use the #00 setting instead of the correct #01 setting it sends more voltage to the ECU, which does a very good job of correcting for my 77mm MAF.

 

got mine for $680 brand new off of my350z

 

I think he meant REAL Nismo S1 cams not the JWT rebadged USA cams.



























J/K...I saw those....what a steal.

 

ooooo right, those are the ones you have to get direct from Japan and mine are the R-tune. Aren't those more agressive than the tomei 268 cams?

 

Update?.................

 

I tried this a few weeks ago using the injector input channels on the EU. I connected one injector input to the vtc solenoid signal and left the other 5 inputs open. I did several WOT runs and the logged IPW was a constant 1.3ms right from 2-6K. After 6K, it was 0. Actually it was 0 any time I was at idle or off the gas (ie. decelerating). All other times IPW was logged at 1.3ms. No intermediate change in IPW would indicate only 2 cam positions. However at this point I would think it is more a data acquisition problem.

I should have something next week that I can scope the cam, crank and vtc signals with a lot more accuracy.

 

SR used the EB and says he logged "Upto 6.8-10.3 msec" and "However the angle appears to be maintained by as little as 1.1 msec". Basically, it ramps up using the 6-10ms and once it reaches that point, duty drops to 1.1ms to hold the position.

IMO, the VTC pullys require a bigger DC to move/rotate via more oil pressure and once it hits the 'target angle' desired by the ECU, it just sends a maintenance DC.

 

I posted a dyno sheet in my other thread that shows the difference between the VTCs working and not working.

 

That dyno makes sense to me now. No difference at 6.2K where the solenoids are no longer being pulsed.

The 350Z fsm actually gives more insight into the VTC solenoid operation because of the additonal related DTCs that the maxima doesn't have in 02/03.

Equal on/off cycles centres the spool (blocking the VTC inlet ports) This locks the fluid volumes on both sides of the pulley vanes so the cam stays put.
Longer on than off cycles pushes the spool all the way out advancing the cam angle. Shorter on than off cycles retracts the spool retarding the cam angle.

Unfortunately, this means that you cannot optimally control the vtcs open loop. Cam position feedback is required so you know when to stop advancing or retarding and hold the cam in position. Any open loop system would mean you would only have the two extreme cam positions.

Looking at my solenoid pulse data now makes more sense. Greater than 90% of the time the pulse width showed 1.3ms but periodically it would drop to 0.8ms for a few samples as the revs increased. Originally I thought this was just normal scatter due to noise. Now I realize it was the ecu periodically changing the cam angle as the rpms changed.

For some reason I was expecting either a progressive increase or decrease in pulse width with rpm.

 

This one? http://www.vq35de.com:2002/Dynos/mwdeltas.jpg

 

yes...so the one that think they dont need vtc's should have their answer now.

 

Thanks Blu...

 

A 3.5 with working VTC will have more area under the curve overall, no doubt. But with the VTC disabled the cams are fully retarded which is great for top-end but loses power everywhere else. The non-VTC'd 3.5 swaps are making better low-end and midrange torque than an A33B with disabled VTC's.

I'll shut up now...

 

i have no insight into the dislike of one person over another on this board....but many of the people on here do things to their cars and keep quiet about them so im not sure why hes gettin flack for staying quiet.


im just happy to see the tq he made but his hp seemed a bit weak to me.


i think we should learn how to share more often and if u want to keep secret mods to yourself then dont tell others about it at all. we really need to learn how to grow as a forum.

 

I bet he'll do much better with headers

 

just an update. hotshot headers were installed and its almost been a week driving aroudn with them. i also fixed my exhaust leak. well my impressions are that exhaust tone has changed. secondly i can say that the headers made the car pull harder. i am hoping to go to the dyno soon and see what i am putting down now. and for the people that say that my hp numbers arelow, they arent low for an almost stock motor.

 

ohh i know...i can't wait to see him put a full set of mods and get us a nice number and a track time

 

I know someone else who's doing just that.

 

I know someone with a Maxima

 

you know someone else with a full 3.5 and z manifold thats gonna run full n/a mods?

 

yes 10char

 

hmm thats nteresting that somebody else actually decided to do the swap this way.

 

It's no secret.


eng92

 

That's not a Max though...Jime has told me if he had to do it over again, I bet he will, he would have gone with functioning VTC.

 

...........

 

i know someone that said he's not putting the z manifold on ...

 

I'm confused...thought he was doing a VQ'd 240.

 

no z manifold with full 3.5....... no care

 

http://forums.maxima.org/showpost.ph...&postcount=123