Engine Rebuild Xmas list - pls comment

Discuss topics related to the CA18DE and CA18DET series engines.
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mdb4879
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S2K needs moar CA


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mdb4879 wrote:S2K needs moar CA
uh? :confused:

Installed Nistune and car fired right up. Nice features and all.

Then went to install the Z32 MAF I got from ebay and it seems to be bad. Had to ghetto rig the old maf back on to get the car driveable again.

Where should I get a descent Z32 MAF? ISIS OE Replacement? Frsport? ebay again?

:cry:

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float_6969
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I'll ALWAYS recommend FRSport. I've been using them for years and they've always been good to me.

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Yeah, same for me. They are a great dealer, but $150 for a USED Z32 MAF vs. $105 for a "New" ISIS OE replacement (I guess made in China).

:mad:

dash
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u may wanna search feedback from ISIS users, b 4 u buy 1

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Izento
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$150 for a used maf?!?! I got mine for like $50. Just search through Zilvia.

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mdb4879
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Cams wrote:
mdb4879 wrote:S2K needs moar CA
uh? :confused:
I'm just messing around. If I ever happen to find a good S2000 shell for cheap I'm gonna CA swap it just for the lulz. Or an RX-8, those can be had pretty cheap with a bad motor.

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Still waiting for the New Bosch MAF to arrive.

Installed the Evo8 injectors and now having issues adjusting Nistune to get the car driveable again. Anyone knows the Latency value for Evo 560cc injectors?

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sjbsuperman1425
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Still waiting on an update to see if that Bosch MAF is a good to go thing.

As for NIStune, I'm assuming you used the change injector option in the "Operations" drop down correct? From there, I think you are looking for an AFR of 14.7 during cruising at 2000rpm or so. That's what I remember of the top of my head. I have NOT done this yet. I'm doing the same thing you are doing now, this coming spring..

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sjbsuperman1425
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Found this thread on the nistune forums. Look at Matt's last post. The info is similar to what you're looking for i think.

"After warming up, see if you can get cruise around 14.7:1 and you should be good"
-Source: http://forum.nistune.com/viewtopic.php? ... e9e5cf432b

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Thanks. I was able to get my Kconstant to a driveable state with the 2000rpm cruise bit I gathered from another thread in the Nistune forums. Still want to figure out how to adjust some of the other Nistune Scales and Tables before I start fiddling with the Fuel and Timing Maps.

The Bosch Z32 MAF (Part# 63107) from amazon just arrived and it is looking quite legit. Will install it tomorrow if I have some time available and report back. Hopefully, it will be easier to incorporate via Nistune, compared to the whole injectors mess.

old Nissan MAF I got from ebay:
ImageZ32 MAF by CamsX200

New Bosch MAF
ImageZ32 MAF by CamsX200

ImageZ32 MAF by CamsX200

Image

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Grr :mad: :mad: :mad:, now with the Z32 MAF everything got even more complicated.

I'm pretty sure all my scales are wrong and I don't know how to adjust them. The Kconstant @ 500 is somewhat driveable, but I'm idling @ 12-13afrs, on load it gets down to 11afr but its detecting some minor knock midway on the table.

It was pretty nice with stock MAF and stock Injectors. Now with the new components it has become a lot more complex.

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sjbsuperman1425
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When you used the change injector and change MAF feature, did you have it automatically adjust the tables as well?

Also, that MAF looks good as far as the element inside goes.

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Yup, MAF is legit as far as I can tell. Thanks for the tip.

I did the whole adjustment bit with the Nistune options selected and my ranges were all wrong. After some more reading last night, I adjusted the scales manually and I think I got close to where they are supposed to be.

I still have no idea how to fix my ultra rich idle. :(

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sjbsuperman1425
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Have you adjusted latency?

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yeah, I was at 128Kconst 670Lat with injectors only. Now with the new MAF I'm at 500Kconst 150Lat with lots of crackling and popping during decel. I pretty sure my K is a tad too high, but I keep thinking my bad idle has something to do with wrong TTPmin/max values.

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sjbsuperman1425
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Honestly, since I've never actually tuned, I don't want to start suggesting places to start adjust because I just don't have the experience. I know BuddyWorm knows how to work NIStune fairly well so hopefully he can chime in..

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It's OK. I have a lot to learn and I'm glad to post my findings as they come.

Read on another Nissan forum that not having enough fuel pressure can cause the "pintle" not to close properly after each injector cycle, maybe causing my rich idle. Since I'm using Evo8 injectors I went with 44psi of fuel pressure instead of the normal 36psi, just to give a shot. Still testing this theory.

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I think my Deatschwerks say to have the fuel pressure around 55psi static pressure for my 550cc injectors.

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I've been progressing bit by bit with the Nistune setup. I'm on 14psi boost and engine hasn't exploded :gapteeth:

Weirdest thing keeps being the idle wanting to go rich after a couple of minutes on 14.7. Settled for 50psi of atmo fuel pressure after having the injectors cleaned at the lab.

Next up boost leak test, 18psi and a visit to the dyno.

ImageNistune 003 by CamsX200, on Flickr

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Are you running a single wire O2 sensor, or a heated?

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None! :slap: :frown:

I don't know if this is causing my rich idle issues. My car never had an O2 sensor (that I could remember, no bung on turbo elbow) but I'm not 100% my 44F07 ECU isn't supposed to use one. It all begin when I installed the Z32 MAF.

My oem CA maf had a 4 wire connector, but we ditched one according to the internets! :poke:

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The engine will try to idle on closed loop. If there isn't one present, the ECU gives up and idles rich. You should be able to turn off all of the closed loop cells and then retune the fuel map for a leaner mixture at idle and part throttle.

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mdb4879
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Is there a function in Nistune to disable the O2 and the knock sensor?

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I think I may have fixed it with float's suggestion. You can disable o2 flags but if you do you cant set negative values (anything above 14.7) in that specific cell of the fuel map. Not sure about knock sensing as I'm using it even if its not 100% accurate, but I believ you can.

Setting the idle is so finicky. MAF idle voltage had to be set pretty high, from what I was recommended at the nistune forums. Adjusted ttp min values, reduced latency and played with AAC. Haven't driven it yet tho.

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mod moved my WTB thread. :(

Please let me know if anyone has this part:
wtb-water-t-shaped-connector-pre-motor- ... 97445.html


Slowly progressing with my tune. Idle is still stable, but I was somewhat lean on boost transition with 14.5 afr on 0 vac/boost, right by the 4th-5th column on my scale, hitting 11.1 on WOT. My wife was driving while I was tweaking this today, but I'm not totally satisfied with changes yet.

Found 2 major boost leaks, 1 on both sides of the TB shaft, which is only evident above 12 psi. And the other one on the BOV gasket which was solved with some RTV.

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My latest map. I'll go out later to test low AFRs.

ImageNistune 007 by CamsX200, on Flickr

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Following up on my build progress, I'm very happy to comment that I was able to race my CA18DET on the weekend and it didn't blow up! :gapteeth: :biggrin: haha!

Jokes aside, the Nistune powered CA18DET 200SX is responding pretty good to my cautious tuning attempts. I was able to run 3 all out drag races, up to 7000rpms @14psi, drive back and forth almost 100 miles to the race track, without a single hiccup. :)

Had not raced it since 2010, but I had a blast. It was an unofficial Drag War, so no official times were given, but I raced against a couple of cars who are usually in the 14secs range, so I'm pretty sure I'm close to that, specially with my old street tires. My wife also participated with her car, which she enjoyed a lot, racing more than 6 times. :rotfl

Here is a video, S13 vs Integra, and some pictures (me and my wife):

[youtube]http://www.youtube.com/watch?v=iwmhB6VgJSw[/youtube]

ImageDrag Wars feb 28 2015 by CamsX200, on Flickr

ImageDrag Wars feb 28 2015 by CamsX200, on Flickr

ImageDrag Wars feb 28 2015 by CamsX200, on Flickr

ImageDrag Wars feb 28 2015 by CamsX200, on Flickr

ImageDrag Wars feb 28 2015 by CamsX200, on Flickr


Now back to the actual tune, I flattened the boost range up top, yet I still have to resolve the boost leak issues, and I think I'm also suffering from air reversion towards the Z32 MAF (due to the recirculated BOV). More testing to be done soon.

Driveability wise, I very happy overall:
idle - 14.6 to 15.1 afrs
cruise 3k rpms - 15.5 to 14.7 afrs
0 to 2 psi boost - 14.0 to 13.7 afrs
14 psi boost - 11.4 to 10.7 afrs (dependent on boost leak :frown: )

ImageNistune 009 New Fuel Map by CamsX200, on Flickr

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float_6969
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Making progress! I wouldn't be too worried about those AFR's at transition either. That's about where I run mine in that range.

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Got a replacement CA TB and new BOV, in order to solve 2 vac/boost leaks I had, so now the car is spot on with my desired AFRs @ WOT (pending another boost leak test).

I want to fine tune some aspects of my config, but Buddyworm is nowhere to be found. :chuckle: :poke:

I have 2 general questions that I would like to hear your opinion.

What would be the Maximum "Safe" rpms that you recommend running on a CA?? I want to set the Rev limiter, and not worry that I could rev a bit more or that I would be hurting my engine. Using 4 ports head, Tomei Poncams, Tomei Springs, Greddy timing belt, Stock valves and rods, Clevite bearing, ARP rod studs, S15 T28 @ 16psi.

Regardless of the Engine Management method used, what ignition timing do you usually use below 0psi (vac) and below 3500rpms? My idle mechanical timing is spot on @ 15°~1000rpms. Max timing in my ignition map is 45° and lowest is 12° at WOT. In nistune I transition kinda like this below 0psi:

800 - 18°
1200 - 20°
1600 - 23°
2000 - 27°
2400 - 33°
2800 - 37°
3200 - 40°
3600 - 42°

Could I be more aggressive here?

Cheers!


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