VVT adjustment- even more lowend power with a gain in topend

[N/A Q45]

http://m1278.photobucket.com/albumview/ ... g.html?o=0

Really wish the "img" thing would work.

I don't know what most stock vvts are set up like as mine looked like the moved from where they were spose to be, so maybe I am just putting them back to stock settings.
But I am wondering if anyone else has adjusted the intake cams as they have quite a lot of adjustment and when I advanced them fully the lowed power is even better, and since the 20* of retard didn't make any change in power until after 6k (unable to utilize the cams benfits) I'm hoping now the engine can get the full benefits from the vvt. If they are retarded the car just loses power everywhere.

The top pic is of the cam fully retarded and the one below is of the cam fully advanced.

http://m1278.photobucket.com/albumview/ ... g.html?o=1

[Q451990]

I'm not sure what's up with the photobucket links. When I right clicked the pictures viewed the address under properties... they're different than at the top of the screen in the address bar. I was able to use that link with image tags to make your pictures show.

Heath

[N/A Q45]

Thank you! I tried for 10min and just said f it.

Photobucket is pain in the a** on my phone.

[N/A Q45]

Now after trying it fully retarded, center and fully advanced. Since I have two wide bands I noitced something rather weird and would only recommend to set they in dead center.

The reason for this is that when I had it centered my afrs were almost identical. Moving the cams either way ( retard or advance) causes some really weird side effects. When retarded the right side would run richer by about 3.0:1afr! And when advanced it is the complete opposite ( the left side is now about 3.0:1 richer than the left) so I guess that means that the cams vvt intake cams should be set only in the center. So if someone has there car that seems to be missing or running rich on one side better to look at the cams as I found out the first time when I noticed they could be adjusted that they were not both in the center, the right cam was almost fully retarded. Just in case anyone wanted to know, or has there car doing the same as my did and running unbalanced.

[Turbon8er]

glad you been playing around with widebands hooked up, i've been wondering about the VVT settings and AFR. I'm about to do the valvecovers this week or next and i'll definitely take a pic of mine, to document where they're set. It should be the factory setting, but this motor has 169k so it'll be interesting to see if they've moved somehow.

[N/A Q45]

glad you been playing around with widebands hooked up, i've been wondering about the VVT settings and AFR. I'm about to do the valvecovers this week or next and i'll definitely take a pic of mine, to document where they're set. It should be the factory setting, but this motor has 169k so it'll be interesting to see if they've moved somehow.

Ya it's a good idea to check for sure. Like I've said before. Mine were way off so I would guess I am not alone. Plz post those pics of yours and if they are off center them.

[Q451990]

Maybe I'm overly cautious, but I don't think this is something Nissan would have messed up at the factory. Maybe there's some engine protection that's being taken out here, or some timing chain stretch that you're adjusting out - but I wouldn't recommend this for just anyone to try.

I'll give you points for trying something new though. I've owned a first gen. Q since 1996 and have spent a lot of internet time on a couple of forums, and I've never seen anyone even think of adjusting these.

Heath

[N/A Q45]

Maybe I'm overly cautious, but I don't think this is something Nissan would have messed up at the factory. Maybe there's some engine protection that's being taken out here, or some timing chain stretch that you're adjusting out - but I wouldn't recommend this for just anyone to try.

I'll give you points for trying something new though. I've owned a first gen. Q since 1996 and have spent a lot of internet time on a couple of forums, and I've never seen anyone even think of adjusting these.

Heath

You never know if you don't try right, I know when I centered them my afrs were dam near identical and the car ran much smoother. I know it hasn't hit any valves at fully retard or advanced, but I am still with you about how you wouldn't recommend this to anyone. I hear you on that one for sure, if someone takes just one of the bolts out too far and drops it inside the engine... that's real bad! Or takes all the bolts out . They only need to be loosened one and a half turns maxx to move the cams.

Some more info on this though.

-when you loosen the bolts the spring in the cam wants to advance it from the second it is loose no matter where it is sitting, (if it's already at full advance it won't go any further) I did notice a good difference from just having them centered compared to one being retarded quite a lot in the factory set up.

- now I am wondering about just leaving them at full advance, sometimes the afrs are almost the exact same as they were when I had them centered, and when that happens the car -will not- hook up at all, it's like hitting Nos compared to when the afrs are different. So I have some new knock sensors coming as that could explain the problem to a degree, but it is still weird how the afrs were -always- pretty much the same with the cams centered and not just 40-60% of the time like they are now.

[N/A Q45]

Here's what it is doing. The first video is from a cold start city driving, 2nd is mostly hwy driving fully warmed up.

https://www.youtube.com/watch?v=hXvl_rd ... ata_player

https://www.youtube.com/watch?v=piF2-iw ... ata_player

[N/A Q45]

And after watching those videos check out this one, I just centered the cams and that is where they'll be staying.


https://www.youtube.com/watch?v=7PDnvMY ... ata_player

[N/A Q45]

So after looking around online I have not seen one! Vvt setup the same as any other. After advancing the intake cams all the way from the bolts that hold it on the cam gear the car is almost as fast with the vvt off as it was before with it on. And when it is on the tires I have on it (225/55r16s)until my other ones come in have no hope in hell of holding it. I can be doing a 50kph roll in 1st with the cams off and kill the tires lol. Everyone needs to do this. It wakes the car the f up in a big way!

The way the cams on most are set that I have seen are around being center in the slots for adjustment. And with that as I had mine the same way the vvt turning off only made a difference after 6k now I can feel it needs the cams off around 4700-5000rpm and the topend is alot stronger as well. I believe that this is because the intake cams were falling maybe past TDC when they were off and now I am thinking they're either at 0TDC or somewhere BTDC but all I know is it made a night and day difference, afrs are almost exact and it's so much nicer to drive from all the lowend it picked up

Someone else seriously needs to give this a try, I guarantee you'll be shocked.

[life602]

I messed with the vvt..but it was in my old honda days with a b16b but notice that when I messed with the cams I also had to mess with the sparkplugg gaps and distributor placement as well but it was a lot of trial and error like when trying to fine tune a carburetor.the set up I had exactly I don't recall but would suggest u do research on the old school b series Honda engines and on the lsvtec and b20vtec because those have the bigger displacement engines and these folks been messing and modin vvt's the longest and then transfer that info in your application..u can also see if a VTEC controller from apexi could work or not...

[N/A Q45]

I messed with the vvt..but it was in my old honda days with a b16b but notice that when I messed with the cams I also had to mess with the sparkplugg gaps and distributor placement as well but it was a lot of trial and error like when trying to fine tune a carburetor.the set up I had exactly I don't recall but would suggest u do research on the old school b series Honda engines and on the lsvtec and b20vtec because those have the bigger displacement engines and these folks been messing and modin vvt's the longest and then transfer that info in your application..u can also see if a VTEC controller from apexi could work or not...

I'm using a rpm window switch. Does the job just fine.

I don't like to open up the gaps with coil on plug setups that much so there's less chance of frying the coil as the gap increases so does the demand on the coil. And it runs pretty dam strong, I'd say the gaps are good, in the future I will try bigger gaps if and when I get higher power coils.

[Zer0_KooL]

Hey N/A I've been trying to PM but for some reason my messages won't go out, I need to know which color wire do I connect to the yellow and then ground?

[N/A Q45]

I just got all four of your mssgs and replied lol I'll take more pics tmrw and help walk you through it if you are still having trouble.