LEXCROB rb20 build

[breadbox]

nice. Keep it up man.

[lexcrob]

So I got a harbor freight tach. I put power and ground to its wires according to the instructions. The green wire I routed to pin 7 yellow/red not working.....
I did the same set up 5 years ago and It worked. The only difference is that I also had the stock 240 cluster wired up and it was working just wrong so I spliced in a harbor freight to the wire.

Maybe that recreated the 10k ohm splice everyone is talking about to pin 49?


huff.....not really shur maybe just wire it into the ground of #1 coil pack...

Trying get it all hammer out today maybe someone hit back in next few hours!

bump

[Yellow4g63]

sorry if I missed something, whats wrong with the factory S14 tach? is it broken?

[Syrus33]

yes you need to put a 10k resistor in line with the tach signal from the ecu

[Yellow4g63]

yes you need to put a 10k resistor in line with the tach signal from the ecu

Not even that. If the stock RB20 S14 tach is working it can be adjusted to read the 6 cylinder tach out put. Did it myself after hearing about it from CarlH a few years ago.

[lexcrob]

It has been a rough few weeks hunting for a new j o b. Gotta make more money so I can dump more in my car! WIN!


I was moving so fast after I slammed her in this is the only shot I got off. I was too excited to get her fired up!




Here is the harness after hours of tracing every wire and making shur all was kosher. 2 pwr wires 2 grd wires FIRED RIGHT UP ! (so now it makes it pretty easy to swap it into.....anything you can think of -- maybe exocet or locost)






My temporary Spartan interior so I could trouble shoot easy. Ended up going a lot smoother than I anticipated. Just a small bit of smoke whoopsie. I accidentally wired one of switches backwards almost bust into flames =melted....Need to make protection fuses bit smaller I guess....






So Finally got her out on the road put 20 miles on it or so far. Took it out to my parents house and layed down some nice new lines on the road for them hehehe. My dad has been working on his 72 ranchero for like a year figured I'd give him some new motivation. That was only 3/4 throttle and I haven't even touched timing yet I believe its a hair retarted or tiny boost leak. Ill have time to tweak on it here soon but its getting there. Didn't have it quite ready for Import Alliance yet again ......too slow.... "UNFORGIVABLE"......


I'm pretty satisfied with this build so far what a relief so much time in this one.

I guess it had posi the whole time.... who knew.....

[breadbox]

Nice, I am getting to the point where I am about to start on mine. I just got an RB25 NEO Harness I need to go over and I should have everything but piping for the intercooler.

Definitely glad you got yours going.

[lexcrob]

sorry if I missed something, whats wrong with the factory S14 tach? is it broken?

I didn't want to wire in the chassis harness.
I did it so it could be easily swapped into another car.
I wanted to see if It was possible to just hard wire it.
I was a little afraid my wiring skills didn't want to put too much time into it. (didn't save any time.....)
The last time I tried to do it the normal way I fried an ecu and had to wait 2wks for a replacement.
I like stuff to be easy A to B power ground it works.

Im trying to justify putting 8 hours into something that really isn't as difficult as I made it seem HUFF....

Ill admit by the time I got done doing it. I could have easily wired it in the way everyone normally does it. Too late now....

yes you need to put a 10k resistor in line with the tach signal from the ecu

I picked up a autometer 5' tach today. Ill try the 10k ohm resistor if it doesn't work either. I don't get the concept behind why that would work. I was guessing wire it to the ignitor number 1 cylinder.
(something like ecm tach output is micro signal needs analog?)
Why would you wire 10k resistor in parallel with 7 and 49 I cant seem to get my head around that.


Ill find out soon enough ill let you guys know what turns out.
I've just about got all the misc. parts together. I'm also working on getting a youtube video together of the whole build!

[lexcrob]

Random stuff here but need some opinions from nico.

Opinions on this book? Looking for a Corky Bell reading level tuning book?


http://www.amazon.com/Engine-Management ... 6075430-20
Im about to put a 04 gt mustang 4.6 2 valve into my buddies s14. Mustang forums said that book is the bible. Im aware an ls1 fits better. Thinking about turbo reading into how to tune a mustang.



Any opinions on this EBC?
http://forums.hybridz.org/topic/83320-a ... -sbc-d-se/


I had to share this with you guys. I work on subaru all day at the dealer and thought id seen it all.....
http://jalopnik.com/5225023/garage-mech ... percharger

[breadbox]

nice. I like how he decided to never use a metal cutting device for that job. I love the inside where you can see all the drilled holes to make a circle.

[lexcrob]

Finally starting to get warm enough to get back on this thing. I finally got around to setting base timing, tps, and idle speed. Runs just about perfect although I still get the occasional stall. The only thing not hooked up is my O2 sensor. I have an LC-1 and tried hooking her up and got error code 8. Im going to mess with it a bit tomorrow morning but my question is.

Is a single wire obd1 KA24DE oxygen sensor the same. Might ditch it until I get a new wideband.

I may shoot the LC-1 with my shotgun and order an AEM or LM2


Also, the "pull up resistor" trick with the ecu tach output signal wired parallel to a 12v source with a 100k ohm 1/4 watt does not work with autometer tach. It moves but is way too jumpy. Im going to try to use one of the CAS wires autometer specifies a 12v square wave. Ill report back what I get.....



Ill throw up some pictures later but a buddy of mine picked up a ? 1990 early (ugly front bumper) skyline. Ive been doing some work on it for him funny how close it is to 240sx underneath. I could of swore a saw a s13 subframe under that thing wink. He is HUNTING HARD for some parts too I figured Id ask around on here for him. Late model r32 front bumper cover anyone?

[Yellow4g63]

The LC1 doesn't have a narrow band out put coming out of the controller?

[lexcrob]

It does but I can never get an LC1 too work.

It throws code 8 for overheating or something. So I don't get an output for my o2.

Ive gone through the recalibration 2x word for word maybe im missing something.

Im going mess with it one more time hopefully ill come up with something.

[Syrus33]

rb20 replacement o2 sensor is the same as a driver side z32 02 sensor i believe. as for the tack, i have it wired using the 10k resistor on a prosport tach and it works perfectly, smooth.

[lexcrob]

I've just about got all the bugs worked out on this thing and now im ready to make some more power RIGHT!

So I figured id give Andy over at Autovaughperformance in Murphysboro a call. I never knew It was so close to me. Long story short after the couple you tube videos I saw on it im sold! The K-constant and latency terms are a bit above my electrical realm but seems to be user friendly enough. Im going to try to pick it up soon so I can start picking at everything until I get a bit more doe $aved up. Then will likely be the larger RAWBROKERAGE "high flow" just for ease of installation unless I go with a precision... I guess ill order 550cc Deatschwerks at the same time. Maybe hunt for a cheaper injector alternative I know there is crossovers. Ebay didn't have any listings for rb26det/GTR stockers I believe they pop right in.

Anybody got some feedback or first hand experience with Nistune? Andy was very knowledgeable for sure that's a big deal for me as I have trouble just wiring up an LC-1.....All 5 wires.......

[Yellow4g63]

I do used it on my 20 before I went to the AEM. GTR injector are low impedance injectors, you would need a resistor box wired up to use them. Stock RB20 injectors are high impedance.

[lexcrob]

Figured id update you guys on my build. Well at least what happened to the engine.




Friend of mine picked up a r32 and needed a fresh motor so I swapped it in for him. It was so easy to swap it when it came with it from the jump who knew. I don't know what I did different but I set timing right in the middle of the adjustment range. Put the idle speed 1 1/2 turn out bolted it in and man I wish I could describe how good it runs now. He plans on following with the mods I was on track for so ill keep you guys posted on how it turns out.




Here is some other RB stuff I wanted to ask and share.



******************wet-vs-dry compression results/OEM RB pistons**************************
I got his old bleeding rb20 so not sure if I want to even crack it open to slam in some rings and see the pistons burned up again. It blew a 130 all way across dry and a 165 across wet. From what ive read its most def. needing some rings. I took the check valve out of my tester and put straight shop air in and it was all crankcase blowby.(didn't have a leakdown gauge) It ran pretty decent it just had so many oil leaks he didn't want to deal with it. Another note is I emailed my buddy in Japan and he said you cant get oversized rb20det pistons........ I had looked EVERYWHERE even for an oem stock bore set and had to go with supertech .40 overs.

Maybe someone knows where to get a set of oe oversize rb20 pistons? I thought manufactures had to make oversize available RIGHT?




*******350z clutch kit for rb20det***********
Also my buddy wanted me to put a fresh clutch in it while it was out. I had to get one over the weekend and turns out after burning down the internet for a few hours. A 350z clutch bolts right up to a rb20det flywheel and is 250mm over the 240mm OE. I had oe flywheel resurfaced .015 to fresh it up and threw it together. Works like a champ feel is amazing just a hair stiffer pedal engagement is crisp and smooth. I bought the advanced auto perfection kit. ***the throw out bearing and pilot bushing are the same as RB*** (as are the KA24DE TOB and pilot)

Lastly, everyone on the internet said go z32 NA clutch kit which I ran 7 years ago on my first rb swap and the TOB is wrong. Also a z32 NA clutch kit is only 240mm according to advanced auto specification listed. Many claim its 250mm.

So 350z clutch is a winner over here Ill see how long it lasts to heavy abuse.