Jump to content
SAU Community

Recommended Posts

Doesn't actually sound like you've hit the cut as yet as in my experiences with boost cut on my R32 GTSt, it's quite violent....ie. you'll know when you've hit it.....Forget falling back to 12psi, you lose all power until you take your foot off the accelerator!! You can get a fuel cut defender to stop this, Turbosmart make one specifically designed for the R32 RB20DET:

http://www.turbosmart.com.au/fuel_cut_defenders.htm (see bottom of the page, I have one and can verify that they work...bit touchy to tune tho!)

Sounds more like your boost control setup and/or the wastegate not being unable to hold all the way up the rev range.....For reference, I used to run 16psi through my steel wheeled R32 turbo without any falling back even at 7000rpm, but that was using a solenoid controlled bleed valve.

Also bear in mind the ceramic turbo tends to fail fairly quickly at these kind of boost levels.

Link to comment
https://www.sau.com.au/forums/topic/37977-rb20det-boost-cut/#findComment-764960
Share on other sites

Hey guys,

doglet - You're telling me mate!! I thought I'd f**ked the car right up first time it happened!!

VLRB20DET - Presuming you're using the R32 RB20DET ECU/Airflow meter and not a custom setup, you will be able run the Turbosmart fuel cut defender I gave a link for earlier, worth about $200 if I recall correctly.

Some useful info about FCDs from my personal experience - the boost cut occurs on the RB20DET when the voltage coming from the air flow meter to the ECU exceeds a particular value (5.05V?), what the fuel cut defender does is clamp the voltage seen by the ECU from the air flow meter to an adjustable amount, usually just below the cut voltage....So just be careful if you do get one as they can lean out the fuel mixtures too much in the upper rev range if not adjusted correctly, many tuners view them as a bit of a band-aid solution and prefer to modify the ECU to remove such cuts....more expensive though!

Link to comment
https://www.sau.com.au/forums/topic/37977-rb20det-boost-cut/#findComment-766073
Share on other sites

It's up to you man, the FCD was okay on mine until I started fiddling around with new mods, at which point - like I said, it was touchy to readjust. With a different turbo bolted on, you're likely to see more decent, reliable power gains from either a modified/dyno tuned RB20 ECU or an aftermarket job such as those you mentioned, and yeah another major benefit is then you can set boost/rev limits wherever you want, but it all depends on what you can afford.

Link to comment
https://www.sau.com.au/forums/topic/37977-rb20det-boost-cut/#findComment-766107
Share on other sites

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

    • This looks great! Awesome to have the 5 speed with an LSD in this. The Recaro's look like SR2's or SR3's. It's a shame they've been retrimmed as they would have looked sweet in their original colours. I think I'd want my agent to be a little more up front and informative too. I've never imported but I reckon it would make me a little nervous, so the more info the better.
    • Thanks for doing that Duncan! Makes you a good person in my books. We don't get kangaroos or wombats here. But we have bats and it's similar. AFAIK it's often the mums with a baby attached that get hit because they drop lower when starting from a tree. If you hit an animal, check on it. https://www.ifaw.org/au/resources/wildlife-rescue-app An app to get the closest wildlife rescue contact.
    • My dream is also to have a proper hoist, but I don't think it will ever happen. My quickjack is probably as close as I'll ever get, it really is very good though. 
    • Yeah we keep on in the dailies, it is pretty poor how many animals get hit and the driver leaves without checking....have saved a couple of little ones over the years. Bit of a gruesome job though, pouches generally need to be cut open because they are so tight and often the joey doesn't realise mum is gone so they are still locked onto the teat. I checked the modules in front of the DS wheel where an oil cooler should go.... There is the radar unit - that can go for race use) One of the 2 HX water pumps, the silver cylinder. That needs to be kept but might be able to be relocated But the bad news, the big computer mounted vertically in front of the wheel (blocking any potential air exit) is the electric steering computer. That is required until/unless i do a hydraulic steering conversion, and in CAD based modern car design it is not like I can just pop a big unit like that somewhere else (plus the loom would be too short anywhere else too). So, the passenger side is OK to clear out (just use a smaller washer reservoir, potentially elsewhere), but the DS no beuno
    • Well, all the best with the new camry It was interesting to hear about the UK process, it is generally a lot more streamlined here with a shipping agent looking after all the import side (noting the exact final price can still be a surprise.....) and I've used a few different brokers on the japan (or US) side, and never had any trouble with any of them....luck of the draw I guess. You mentioned you didn't get the auction sheet (understandable since you bought it from a dealer, not auction), but I always try and get hold of that because they are pretty thorough. I've imported 2x R grade vehicles over the years and both were fine, repairs in Japan are pretty thorough compared to here in Oz.
×
×
  • Create New...