My Rb25Det Turbo Glowing? Help!

[Bigazza69]

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???.

[MBS206]

Work out where the restriction is.

Where is your boost source for the waste gate connected to?

What's the cat like?

Whats the TMIC on the patrol like?

[Bigazza69]

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]

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 May 19, 2013 by StevenCJR31

[Bigazza69]

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.

[Bigazza69]

But fuel gauge does look like she's loving the fuel for a few short drives

[StevenCJR31]

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?

[xntrq]

What do you mean by glowing? like actually metal glow from heat? Just curious

[StevenCJR31]

^^ have a look at a engine dyno run on youtube (rb30det) the pipes/turbo etc all glow red hot within a few seconds of the operator slowly bringing the motor up to redline

[Bigazza69]

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

[HR32GTS 4DOOR]

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

[Bigazza69]

Gonna check the timing tomorrow, I was under the impression of the timing was out it would run at least the slightest bit rought, but it sounds and moves beautifully

[Bigazza69]

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]

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]

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]

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..

[Bigazza69]

And it def makes more power timed at 25btdc at 15btdc she was no where near picking up the same

[jiffo]

Don't just check IGN timing, pull the cambelt cover and check your valve timing.

Camwheels have reference marks on the back cover, balancer has TDC.

Someone may have replaced the cambelt and missed a tooth.

[Bigazza69]

Sorry thought i wrote that on here, everything was checked and spot on everything lines up

[89CAL]

Ignition timing at idle should be 15 degrees BTDC

You wouldnt by any chance have a faulty CAS?

Other then that check fuel system as suggested