Jump to content
SAU Community

My Rb25Det Turbo Glowing? Help!

Bigazza69
 Share

Recommended Posts

Bigazza69 Apprentice

Bigazza69

Posted
Posted

Hey guys new to the forum..

I am quite mechanically minded and have fitted an rb25det into a gu patrol.

I am running a stock as a rock rb25det skyline engine. Only difference is using the patrol top mount intercooler.

Everything seems to be running really well, doesn't overheat, boosts fine, runs 7 pound and everything seems responsive. BUT after a very short drive the turbo starts to glow and not under heavy load. And when I do heavy load it the turbo starts to get a brighter glow.. What do I do???.

Link to comment
https://www.sau.com.au/forums/topic/425529-my-rb25det-turbo-glowing-help/
Share on other sites
Bigazza69 Apprentice

Bigazza69

Posted
  • Author
Posted

There is no restriction full 3 inch straight through exhaust, has a 3 and a half inch brand new high flow cat literally done less than an hour running on.

Waste gate joins to the intake pipe as per standard rb25det.

And the top mount intercooler sealed with no leaks with no restrictions

StevenCJR31 Veteran

StevenCJR31

Posted
Posted (edited)

hows your fuel economy? is unburnt fuel / still burning fuel going through the turbo? that motor will be working hard lugging around a fat patrol

Edited by StevenCJR31
Bigazza69 Apprentice

Bigazza69

Posted
  • Author
Posted

Well couldn't tell you about economy as haven't run it long enough coz I don't wanna blow it..

I'm not 100% if there's unburnt fuel, normally there would be some smoke? Yes? But there is none, it does get some cracklling up when coming down gears.

A lot of people have done the conversion and had no problem with it carrying the wait.. Figured this was a problem someone might have had an issue with in a skyline.

StevenCJR31 Veteran

StevenCJR31

Posted
Posted

Well couldn't tell you about economy as haven't run it long enough coz I don't wanna blow it..

I'm not 100% if there's unburnt fuel, normally there would be some smoke? Yes? But there is none, it does get some cracklling up when coming down gears.

A lot of people have done the conversion and had no problem with it carrying the wait.. Figured this was a problem someone might have had an issue with in a skyline.

if there was any smoke it MAY be burnt up in the cat ? for the turbo to glow like that there must be fuel burning in it, if that is the case then the stock turbo wont live a long life, from what ive read on here there hasnt been a lot of glowing turbo problem skylines~one or two with warped exhaust manifolds tho! would it be feasable for you to try a front mount ic to eleminate any possible restriction?
Bigazza69 Apprentice

Bigazza69

Posted
  • Author
Posted

Yea can't fit a front mount without removing ac, and by glowing I mean turbo is red hot glowing... It shouldn't get that red from not boosting for heavy periods... In my opinion but I haven't worked With these motors before

Bigazza69 Apprentice

Bigazza69

Posted
  • Author
Posted

Have you checked your timing? Could be that it is heaps retarded and blowing out the burning fuel through the turbo

Checked the timing and set it at 15 btdc With timing gun, and that turbo gets way to red hot.. If the crank was out would the car still run perfect but overfuel/ under fuel??

HR32GTS 4DOOR Community Regular

HR32GTS 4DOOR

Posted
Posted

Sounds like It may be running lean, can be caused by a few things. For example when I bought my curent engine, there was a mix up with the plenums put on it and I got an NA one with NA injectors in it. Surprisingly the Motor still ran smooth (was surprised it ran at all) so took me ages to find what my lack of power was caused by. But anyway that caused my turbo to glow red with just moderate load. So morral to the story, check everything related to the fuelling system.

P.S. surprisingly I don't have 6 cracked pistons from the running lean from the balls injectors :)

mad082 Grand Master

mad082

Posted
Posted

Running lean it will generally run well (you make more power lean than rich, to a point). But it runs hot. I'd say that the fuel pump may be to blame, or possibly a blocked fuel filter.

Pull out the spark plugs. That will give you an idea on whether it's running lean

Bigazza69 Apprentice

Bigazza69

Posted
  • Author
Posted

Has brand new vl turbo fuel pump, brand new fuel filter.. Everything runs really well when it's timed about 25btdc, but the turbo glows just not as quick.. Someone said it may be the reg letting through too much fuel? That's why I thought increasing the timing is helping it burn off but still not enough to keep the turbo cool. Thinking maybe aftermarket fuel reg. but I have a mate bringing a wide band over tomorrow before I buy anything so il know for sure..

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MissMintyR33
      R33 persistent issues. P/steering and lag/misfire

      By MissMintyR33 · Posted

      I thought that might be the case, thats what I'll start saving for. Thanks for the info 
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Ps i found the below forum and it seems to be the same scenario Im dealing with. Going to check my ECU coolant temp wire tomorrow    From NICOclub forum: s1 RB25det flooding at start up Thu Apr 11, 2013 7:23 am I am completely lost on this. Car ran perfectly fine when I parked it at the end of the year. I took the engine out and painted the engine bay, and put a fuel cell with an inline walbro 255 instead of the in tank unit I had last year. After reinstalling everything, the engine floods when the fuel pump primes. if i pull the fuel pump fuse it'll start, and as soon as I put the fuse back in it starts running ridiculously rich. I checked the tps voltage, and its fine. Cleaned the maf as it had some dust from sitting on a shelf all winter, fuel pressure is correct while running, but wont fire until there is less than 5psi in the lines. The fuel lines are run correctly. I have found a few threads with the same problem but no actual explanation of what fixed it, the threads just ended. Any help would be appreciated. Rb25det s1 walbro255 fuel pump nismo fpr holset hx35 turbo fmic 3" exhaust freddy intake manifold q45tb q45 maf   Re: s1 RB25det flooding at start up Fri Apr 12, 2013 5:07 am No, I didn't. I found the problem though. There was a break in one of the ecu coolant temp sensor wires. Once it was repaired it fired right up with no problems. I would have never thought a non working coolant temp sensor would have caused such an issue.
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Hi sorry late reply I didnt get a chance to take any pics (my mechanics on the other side of the city) but the plugs were fouled from being too rich. I noticed the MAF wasn't genuine, so I replaced it with a genuine green label unit. I also swapped in a different ignitor, but the issue remains. I've narrowed it down a bit now: - If I unplug and reconnect the fuel lines and install fresh spark plugs, the car starts right up and runs perfectly. Took it around the block with no issues - As soon as I shut it off and try to restart, it won't start again - Fuel pressure while cranking is steady around 40 psi, injectors have good spray, return line is clear, and the FPR vacuum is working. It just seems like it's getting flooded after the first start I unplugged coolant sensors to see if its related to ECU flooding but that didnt make a difference. Im thinking its related to this because this issue only started happening after fixing coolant leaks and replacing the bottom part of the stock manifolds coolant pipe. My mechanic took off the inlet to get to get to do these repairs. My mechanics actually just an old mate who's retired now so ill be taking it to a different mechanic who i know has exp with RBs to see if they find anything. If you have any ideas please send em lll give it a try. Ive tried other things like swapping the injectors, fuel rail, different fuel pressure regs, different ignitor, spark plugs, comp test and MAF but the same issue persists.
    • GTSBoy
      Freddy Plenum vs Genuine options RB25

      By GTSBoy · Posted

      My return flow is custom and puts the return behind the reo, instead of at the bottom. All my core is in the air flow, rather than losing some of it up behind the reo. I realise that the core really acts more as a spiky heatsink than as a constant rate heat exchanger, and that therefore size is important.... but mine fits everything I needed and wanted without having to cut anything, and that's worth something too. And there won't be a hot patch of core up behind the reo after every hit, releasing heat back into the intake air.
    • Murray_Calavera
      R33 persistent issues. P/steering and lag/misfire

      By Murray_Calavera · Posted

      There is a really fun solution to this problem, buy a Haltech (or ECU of your choice) and put the MAF in the bin.  I'm assuming your going to want more power in future, so you'll need to get the ECU at some stage. I'd put the new MAF money towards the new ECU. 
×
×
  • Create New...