Jump to content
SAU Community

Recommended Posts

I've just fitted some Splitfire SF-DIS-001 coilpacks. Initial test shows a big improvement. The car now starts instantly and no more misfire under acceleration. Not bad for an hour's work.

The manual has a warning saying that after fitting them, you may get knocking/detonation and should adjust the timing to suit. I'm fairly sure the timing isn't adjustable on these engines. Is that the case?

Should I be disconnecting the battery to do an ECU reset, or is that not a thing on these ECUs?

I'm also thinking that next time I go into that area, I want to get rid of the pointless cover. Literally the only use it serves is to provide a mount for the power transistor. Question is where is a good place to relocate the power transistor to? Should I just cut the cover down to just the last 4 screws as even this will make it less annoying to deal with as it won't conflict with the J pipe.

Anything else I should know?

Edited by Lum

Basically the same thing for all RB engines:

Timing an RB20DET

By: goofynick

Warm up car to operating temp.

Make sure idle is 650 +/- 50 rpms. You can adjust your idle RPM's with a flathead screwdriver by turning the screw on the AAC. You have to unplug the brown plug from the AAC first, then plug it back in.

Unplug the TPS (not the idle switch, but the tps, has the cord hooked to the plug coming out of the sensor).

Hook up timing light around the loop at the back of the engine coming out of the ignitor pack (black wire loop).

Check timing, if way off, then flip the way the thing is connected around that loop.

Set to 15 degrees for manual trans, 20 for auto with car in neutral, do so by loosening 3 bolts on cam angle sensor and rotating it left or right.

Tighten CAS.

Plug tps in and rev engine, then unplug TPS and check again to be sure it is at 15 degrees with idle around 650rpms.

Shut off the car and uplug everything the timing light, plug tps back in and unplug battery for 10 mins.

Hook up the battery, restart the car and go drive it hard for a few minutes.

Source: http://forums.nicoclub.com/adjusting-timing-on-an-rb20det-t218636.html

Edited by Jswljones

Panic over.

I got my partner to have a listen to it. She is better at this kind of thing than I am.

Results:
It's only happening on one cylinder
It gets better overall as it gets warmer.
It gets worse under acceleration

Conclusion:
Most likely an exhaust gasket.
Possibly also a noisy tappet.

Annoying, but I have more important things to worry about.

  • 2 months later...

Well I can now confirm that it was actually the turbo gasket. It just finished blowing during accelerating up to 70 from a toll booth!

I guess I should do both turbo gaskets and all 6 exhaust gaskets at the same time as it looks like a pain in the arse job.

Are they the same for RB20 and RB25? Different sellers seem to disagree on this.

Edited by Lum
  • 3 months later...

Updating an old thread, but this is finally sorted. Turned out that 5 exhaust manifold gasket studs had snapped, both the ones on cylinder 6 and 3 at the front as well.

My local place wanted to take the head off and drill them out, so I told them to get stuffed and took it to a place up in the valleys, a place where the owner's project car was a 400bhp SR20 S13. Got them drilled out with a right angle drill, new manifold/turbo/exhaust gaskets fitted, it sounds lovely now.

Now I just need to fix a grounding issue that has developed, and a sticky solenoid in the starter motor, pretty easy stuff by comparison.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Update 3: Hi all It's been a while. Quite a lot of things happened in the meantime, among other things the car is (almost) back together and ready to be started again. Things that I fixed or changed: Full turbo removal, fitting back the OEM turbo oil hardlines. Had to do quite a bit of research and parts shopping to get every last piece that I need and make it work with the GT2860 turbos, but it does work and is not hard to do. Proves that the previous owner(s) just did not want to. While I was there I set the preload for the wastegates to 0,9bar to hopefully make it easier for the tuner to hit the 370hp I need for the legal inspections that will follow later on. Boost can always go up if necessary. Fitted a AN10 line from the catch can to the intake hose to make the catchcan and hopefully the cam covers a slight vacuum to have less restrictive oil returns from the head and not have mud build up as harshly in the lines and catch can. Removed the entire front interior just shy of the dashboard itself to clean up some of the absolutely horrendous wiring, (hopefully) fix the bumpy tacho and put in LED bulbs while I was there. Also put in bulbs where there was none before, like the airbag one. I also used that chance to remove the LED rpm gauge on the steering column, which was also wired in absolute horror show fashion. Moved the 4in1 Prosport gauge from sitting in front of the OEM oil pressure gauge to the center console vents, I used a 3D printed vent piece to hold that gauge there. The HKB steering wheel boss was likely on incorrectly as I sometimes noticed the indicator reset being uneven for left vs. right. In the meantime also installed an airbag delete resistor, as one should. Installed Cube Speed premium short shifter. Feels pretty nice, hope it'll work great too when I actually get to drive. Also put on a fancy Dragon Ball shift knob, cause why not. My buddy was kind enough to weld the rust hole in the back, it was basically rusted through in the lowermost corner of the passenger side trunk area where the wheel arch, trunk panel and rear quarter all meet. Obviously there is still a lot of crustiness in various areas but as long as it's not rusted out I'll just treat and isolate the corrosion and pretend it's not there. Also had to put down a new ground wire for the rear subframe as the original one was BARELY there. Probably a bit controversial depending on who you ask about this... but I ended up just covering the crack in the side of the engine block, the one above the oil feed, with JB Weld. I used a generous amount and roughed up the whole area with a Dremel before, so I hope this will hold the coolant where it should be for the foreseeable future. Did a cam cover gasket job as the half moons were a bit leaky, and there too one could see the people who worked on this car before me were absolute tools. The same half moons were probably used like 3 times without even cleaning the old RTV off. Dremeled out the inside of the flange where the turbine housing mates onto the exhaust manifolds so the diameter matches, as the OEM exhaust manifolds are even narrower than the turbine housings as we all know. Even if this doesn't do much, I had them out anyways, so can't harm. Ideally one would port-match both the turbo and the manifold to the gasket size but I really didn't feel up to disassembling the turbine housings. Wrapped turbo outlet dumps in heat wrap band. Will do the frontpipe again as well as now the oil leak which promted me to tear apart half the engine in the first place is hopefully fixed. Fitted an ATI super damper to get rid of the worn old harmonic balancer. Surely one of the easiest and most worth to do mods. But torquing that ARP bolt to spec was a bitch without being able to lock the flywheel. Did some minor adjustments in the ECU tables to change some things I didn't like, like the launch control that was ALWAYS active. Treated rusty spots and surface corrosion on places I could get to and on many spots under the car, not pretty or ideal but good enough for now. Removed the N1 rear spats and the carbon surrounding for the tailpipe to put them back on with new adhesive as the old one was lifting in many spots, not pretty. Took out the passenger rear lamp housing... what do you know. Amateur work screwed me again here as they were glued in hard and removing it took a lot of force, so I broke one of the housing bolts off. And when removing the adhesive from the chassis the paint came right off too. Thankfully all the damaged area won't be visible later, but whoever did the very limited bodywork on this car needs to have their limbs chopped off piece by piece.   Quite a list if I do say so myself, but a lot of time was spent just discovering new shit that is wrong with the car and finding a solution or parts to fix it. My last problem that I now have the headache of dealing with is that the exhaust studs on the turbo outlets are M10x1.25 threaded, but the previous owner already put on regular M10 nuts so the threads are... weird. I only found this out the hard way. So now I will just try if I can in any way fit the front pipe regardless, if not I'll have to redo the studs with the turbos installed. Lesson learned for the future: Redo ALL studs you put your hands on, especially if they are old and the previous owners were inept maniacs. Thanks for reading if you did, will update when the engine runs again. Hope nothing breaks or leaks and I can do a test drive.
    • No those pads are DBA too  but they have colors too. I look at the and imo the green "street" are the best.
    • I’m not sure what happened I told them about sonic tunes free OTS tune and the next the I know .. I was booted..   To funny 
    • Yea - I mean I've seen my fuel pump which is decades old and uh, while I'm not saying this with real knowledge... but I sure get the ick at using anything in the fuel system that produced the state of that pump. Many years ago I went through multiple pumps (and strainers) before I dropped the tank to clean it out with extreme violence. I'm talking the car would do maybe 50km before coming to a halt, which resulted in me cleaning out the filter with some brake cleaner and going on my way. None of my stuff ever looked like what came out of your fuel tank. I don't think I'd be happy with it unless every single component was replaced (or at least checked/cleaned/confirmed to be clean here).
×
×
  • Create New...