Jump to content
SAU Community

Recommended Posts

S1 RB25det. Manifolds, intercooler, avcr, haltech, blah blah blah....either way, I've got a huge diesel turbo that I'm trying to spool. Set my exhaust cam to 4 degrees retarded (2 notches on cam gear) Do I have to change my base timing since the cas reads off the exhaust cam, or do I leave it? I have searched and searched for this here. Please help, as I want to spool this turbo so my friends SR won't desecrate my RB!

post-71145-1285473667_thumb.jpg

post-71145-1285473695_thumb.jpg

post-71145-1285473582_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/338184-retard-ex-cam-gear-base-timing/
Share on other sites

yes you need to reset ignition timing

That's what I was trying to tell my friend.... So Two notches at the cam gear = 4 degrees of crank timing, so the crank pulley marks will be 4 degrees off, so the thing to do would be to time the crank timing at 11 degrees, correct? Thank you for you time. I've been working so hard on this car that I tend to get a bit scatterbrained and overthink it.

info on turbino please

The turbo is a diesel turbo used on merceds and volvo commercial trucks. I don't have all the measurements with me right now, but internally it measures like a holset hx35, maybe a tad more flow. It's a Journal bearing K27 with a billet compressor wheel. It looks huge because the housing are just so damn big. The exhaust housing is an 11cm^2 I belive. It's internally gated. The stock actuator was set at 30psi, so I threw an 11psi Garrett actuator on it til I gate it externally. It is a twin scroll exhaust housing, on a non divided cheap manifold which I have reinforced and mad a support for. No BOV. My plan is to do a sound performance quick spool valve, but surprisingly, this turbo is kinda spooling alright. Here is a link to it. http://eng.turbo3k.com/catalogue/d-37/ I have just gotten everything together on this car. A lot of diy fabwork for me to fit everything... Right now I need to get a few more things (injectors, rail) so I can get it on the dyno and get the Haltech PlatPro Plugin tuned. For now I'm only running about 13-14 psi which is on around 4000 rpm, but it feels like it could really spool faster when I can turn up the boost with a good tune. BTW, did I mention that I bought it brand new (Genuine KKK turbo. They get a ton in to bench test motors. This one hadn't even been used yet.) from a friend that works at the Volvo truck plant for 100 bucks?! My RB sounds ballistic with this turbo. Sounds like a Mack truck in fast forward, lol

Edited by TongWoo

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

    • I like mine. Much better than stock. Like i said before the reverse/parking cameras look even worse than normal, still useable. When you buy one make sure it's the latest version. Heaps of cheap ones that run the old hardware and software. Got mine from AliExpress. Mine is quick no lag, boots up 1-2 sec. Menu is fast. Netflix is fine and so is YouTube. Android Auto is random taking 3sec to 15sec. Most of the time it's quick. Very rare it doesn't connect. But that could be a phone thing.   Now I think they use a Pixel 3XL to run this whole thing which i guess is fine, but the problem is that some apps will not work on old hardware like Disney Plus  Maybe Prime Video too 🤔. they will not update. Iv'e tried getting the APK Disney + but i still couldn't get it working. I have a Data sim installed so i have internet all the time. You can't Hotspot off your phone and connect Android Auto at the same time. Not that you need too, if you want you can hotspot off your phone and run any internet map app (google maps) and you can run the Spotify app on it's own (the app runs better than android auto) You can still access the INFINITI intouch system for all the o.g stuff    P.S i got new non Polarization Sunglasses too 😎 
    • I also don't mean to rain on your parade. But with a 5-10k budget for road only? I'd want to check confirmation that everything IS working correctly and I'm with @GTSBoy for a plan of action here. I'd be checking subframes, bushes, exhaust hangers, interior bits and generally QOL things and CONFIRMING they are working right before thinking about motor. You can get 250KW+ on stock RB26 hardware by simply removing the built in restrictors and tuning the stock ECU. If you want purity that's as far to take it, which I would be worried to do and won't think the budget would allow for when earnestly checking for 30+ year old car stuff.
    • I specifically said buy new performance car because of the use case here (i.e, no track use and fun livable everything/do it all easily if not especially amazing as a drivers car). Tracking an 80K Skyline and an 80K M2 makes the BMW the obviously more risky purchase WHEN something goes wrong you suddenly can't easily fix it with hand tools and readily available parts that you may have a community of people you know available, or years of your own knowledge on the platform to apply. There's reasons you see Hondas and Vettes and RB's and Miatas and such at tracks, you can easily hand-tool repair 99.9% of it in a shed, usually with the tools and the skillset of the owner to apply to it. An i30N is not going to beat a R chassis unless it's got massive problems either. The old cars can, and still do work great. The problem is - and always has been - social media would have you believe it's simple and easy to achieve the results you see online.  People want their car to be like "one of those cool JDM cars" which is the default image people have when they think of  "cool JDM cars" You are paying 25 years of catchup R&D to achieve. Or the knowledge somebody else has to do it for you, which is big dollar restomod stuff.  The bar has been moved and every R chassis that people see/like/enjoy has 25 years of R&D thrown at it, or is owned by someone who did all that work and has that knowledge over the past 25 years. All the survivors have been progressively resto-modded the entire time. OR you slowly bring it back to how it was stock. Which is also prohibitively expensive, done for the love of it. This is what the JDM community is now. This is fine, but "Where do I start?" is either: 1) Don't 2) Take your own slow journey but you cannot compare your progress with others who have had 25 years of R&D and experience building their own cars unless you pay for it.
    • Yep, with the crazy inflation of the value of our cars these past couple of years this became a problem for me too... My solution is to transition to bikes. Everything feels so cheap compared to tracking the skyline lol
    • So, I've been a little busy on this car. I replaced the bonnet struts which is always satisfying but very confusing that nobody else on the planet seems to do this. Its just my routine first thing I do on any car I buy. The boot struts for both the tailgate and the separately opening glass window was a bastard. And, I found a fair bit of rust in the strut cavity. I filled it with rust converter and cleaned up as much of the dirt as I could. There was so much dirt. One piece of the trim was barely hanging on and so I've left it off. I'll try to get a replacement. You can see how disgusting and dirty it all was in this thread; I had to remove the little clips that hold the struts on the ball. The ones I took off had no clips and it was impossible to get them on with them in place. Fingers crossed they stay put. So, I turned my attention to the headlights, they were in a bad way and likely would stop rego. I took the headlights out and found the adjusters were all just loose. So, I fixed those and unclipped the lenses to clean them up. Couldn't believe how easy it was to take all this apart compared to the E90.   I also cleaned up the stockies which was awesome, these are super cool with lug nut covers. They're in good nic but the tyres are shot. I was going to use these for rego but in the end got a fresh pair of rubber for the 17's on the front of the car instead. The front bar of this car is from a late(r) model one. I don't think it's quite LCI but who knows. I'll need to find out. Anyway, the bar was missing the fog lights and the wiring and plugs were for the original ones so I got new plugs and some cheap fogs. I wasn't sure if missing original equipment would hamper my blue slip attempts. Had a couple of these little fellas helping out. But not Ben who got stuck behind the pool heater .... How embarressment.  I ordered new speed sensors for all corners because I knew one was out. I just got cheapies and will replace them with Bosch items when I can find Bosch items. Again, this was just for rego. Alas, it seems the blue speed sensors are not the same as the grey ones. Back they went and replacements ordered. In the end, with my new scan tool, it was just rear left that was shot. Replaced it and cleared the codes. All good now. Lastly, my aux (thermo) fan is being a bit odd. Its powering up at strange times and NOT powering up when I think it should (100C). While this can be caused by a few things, the most likely (for me) is the ambient temp sensor. Given mine reads -40.0C regardless of the temp, I figured it would be good to replace it. In the end, the sensor wiring was abysmal with (terrible) attempts made by somebody to fix it.   I fixed this all up but the sensor is only attached using pins into the wires. The plug is not there. Despite trying and trying to connect it securely it wouldn't work so a replacement sensor and plug is on the way. Oh, I also ordered a replacement piece of trim for the part missing here at the bottom. Ordered from Latvia for $70 delivered. I took a bit of a leap of faith because I didn't have the exact part number and, as usual, there were eleventy billion pieces of trim that looked to fit. Nailed it. Well, its not totally perfect but I think its more a 28 y/o car problem than a trim problem. And, as of today ..... I have bought the workshop manuals 2nd hand off a guy in tassie. 1000+ pages of E39 goodness, hopefully it helps me with the fan. I also have a new temp switch on the way incase its the problem. Stoked.
×
×
  • Create New...