Turbo's

Submitted: Sunday, May 03, 2009 at 18:31
ThreadID: 68480 Views:3115 Replies:7 FollowUps:16
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There has been a few threads lately on turbo's so I thought I would share with you all a turbo sucsess story. (mine).
About a month and a half ago I fitted a garret variable vane turbo to my navara and have put a few tanks of diesel through now.
My fuel economy is about the same 10's around town and mid 9's on the highway but economy was not the reason for the change.
What I was after was a bit more power when towing.
The change is unbelieviable you cannot flick the gear stick fast enough as the turbo has no lag at all. The car will pull from 1000rpm in fourth gear with no labouring at all , so all in all am very happy with the results.
What was interesting was when the dyno was done with the larger than standard tyres was how much torque and power was lost.
I remember reading a thread not long ago when I think footy put up some results with different tyre sizes.
In my profile is two dyno charts one from me the other was another navara with the same work done as mine just smaller tyres
It is a real eye opener what tyre size can do to performance.
So if anyone else is thinking of doing this I can highly recomend it.

Regards Ross
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Reply By: Member - Graham H (QLD) - Sunday, May 03, 2009 at 19:38

Sunday, May 03, 2009 at 19:38
Was going to post a bit about turbos and towing so here goes.
Have an EGT gauge on my Cruiser and interestingly found this.
Watched it today coming back to Erldunda from Kings Canyon.

Am towing a 2.8 tonne van Was windy,side to front quarter.
In overdrive EGT got up to 400deg even on a long gradual downslope.
Drop it back into 4th and it dropped as low as 325 even on slight upslope.

One for those who say dont tow in overdrive.


Coming up from Pt Augusta to Coober Pedy got 7k per litre mostly in 4th which I thought was pretty good.
Cheers
AnswerID: 363014

Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 19:53

Sunday, May 03, 2009 at 19:53
Hi Graham

Where have you got your EGT guage fitted before or after turbo.
Mine is before so my temps change very quickly but gives you a more accurate reading on what the engine is doing.
Have been told temps can vary upto 150deg plus across the turbo.
Ross
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Follow Up By: Member - Graham H (QLD) - Sunday, May 03, 2009 at 20:20

Sunday, May 03, 2009 at 20:20
Mine is about 3 ins below dump pipe in a 3"exhaust.

Too much trouble to take it apart and do it pre turbo.

Have been told to allow 200deg difference.

Had mine up to 500deg going up a long hill between Batemans Bay and Canberra when pulling hard near the top of the ranges.

Lugging obviously doesnt pay and yet it was getting along OK this morning.
Going on fuel usage the other day running in 4th doesnt make it any worse either.
Only travel at 80-90 anyway with van on.
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Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 20:52

Sunday, May 03, 2009 at 20:52
Graham

Runing on the highway empty (2.5 ton) mine will sit on about 325deg

Coming back from last gathering with camper gave it a good squirt and sat on 140kmh just to see what the temps would do and they sat on about 480 deg. So it all runs pretty cool in the exhaust which is good.

Disclaimer :- I dont normally travel that fast :)

Ross
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Follow Up By: Member - Tony & Julie (Malanda - Monday, May 04, 2009 at 06:40

Monday, May 04, 2009 at 06:40
Ross - Towing at 140k - Wow! I would suggest a disclaimer is worthless :-). Maybe a confession on line like this is an admission of speeding and a fine is on the way :-). I would have left out the 140k and stuck with a good squirt. Best of luck - Cheers Tony
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Reply By: Member - Malcolm (Townsville) - Sunday, May 03, 2009 at 19:53

Sunday, May 03, 2009 at 19:53
Agree with Ross and Graham

Fit the EGT Gauge !! You can then watch your temps and if they get too high - back off.

Under heavy load mine went up to 500c in OD. Drop out of OD and revs go up to 3K and temp COMES DOWN to 420c

Malcolm
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AnswerID: 363019

Reply By: Member - Nick (TAS) - Sunday, May 03, 2009 at 20:10

Sunday, May 03, 2009 at 20:10
Yep, just goes to show, keep a diesel revving and dont slog it equals lower running temps.
AnswerID: 363026

Reply By: Isuzumu - Sunday, May 03, 2009 at 20:27

Sunday, May 03, 2009 at 20:27
Good post Ross....I have my EGT in the manifold pre turbo. I had mine get to around 720 and straight away knew I had some sort of problem realised (knowing my MU so well) that the hoses on my air to water intercooler could be loose. Yep pulled over and a bit of oil around, now fixed better clamps and a bracket to keep every thing in place. So what was happening was low boost but still heaps of fuel, so if your going to play with more power for your diesel get a EGT gauge.
OK Ross what did this new turbo cost please?
Cheers Bruce
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AnswerID: 363031

Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 20:44

Sunday, May 03, 2009 at 20:44
Hi Bruce
Turbo drive in drive out $4000
I also have a manual blow off valve fitted to my inlet manifold so no chance of over boosting.
King Cane Toad (Trevor R) took it for a drive a couple of weeks ago and was very impressed.
He was comparing it to his truck that has been tricked up and says it pulls a lot harder than his.(vehical that is)
As you have travelled with Trevor you would know he likes to get from point A to point B with out delay.hehehe
Ross
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Follow Up By: Trevor R (QLD) - Monday, May 04, 2009 at 12:52

Monday, May 04, 2009 at 12:52
Bruce,

It really is a sensational result and if it is said that the 4.2's pull like a freight train then Ross's Nav could be said to pull like a 747. If you got the boot into it (and I did have a few times hehhe) you very quicly reach redline and can't get into the next gear quick enough. I would highly recommend this superb setup to anyone contemplating upgrading their Nav's power.

You wait until you se the welding work and the quality of all workmanship on this upgrade Bruce, it is almost a work of art.

Don't try and blame me for any of this either Rossco...."me like to get from A to B quiclky" How did you slide this upgrade by SWMBO.....I suppose you told her the old turbo was on it's way out or something did you? LOL! "Done for better towing performance" are you sure there was no compensating factor involved? hehehe

As you already know I think it is a pearler of a result.

Regards from NQ to you both.
Trevor.
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Follow Up By: Ross H (QLD) - Monday, May 04, 2009 at 13:20

Monday, May 04, 2009 at 13:20
Come on Trevor, Play nice you know the rules......What happens under the bonnet stays under the bonnet hehehehe.

P.S. have you been talking to SWMBO hahahaha

Ross
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Follow Up By: Isuzumu - Monday, May 04, 2009 at 14:49

Monday, May 04, 2009 at 14:49
Did you put it back on the dyno? and if so how much increase after the new turbo mate? Not that my SWMBO would let me spend that sort of dough lol.
Cheers Bruce
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Follow Up By: Trevor R (QLD) - Monday, May 04, 2009 at 15:15

Monday, May 04, 2009 at 15:15
Rossco can I take it from your politician like answer that you didn't get approval and you are now as deep in it that you dare to be?

I can hear it now " ummm we need beter towing power.....so,... so we can pull the 250kg cubbymatic better and, and.... I gotta pull away from Trevor on our next trip. That guy really gets up my nose but I can't seem to outrun him even though he's pulling that mobile roadblock of his and we're just pulling a tent on wheels." Hehehehhe.

Cheers Rossco,
Trevor.
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Follow Up By: Ross H (QLD) - Monday, May 04, 2009 at 15:26

Monday, May 04, 2009 at 15:26
Ha ha ha the best place to out run you is to head for the hills and I can get away while your temps are in the red.
Give myself a head start before the flats.

Now stop flapping your gums and get back to work. LOL

Ross
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Follow Up By: Ross H (QLD) - Monday, May 04, 2009 at 15:31

Monday, May 04, 2009 at 15:31
Hi Bruce

12 and 14% Torque/HP

ross
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Follow Up By: Isuzumu - Monday, May 04, 2009 at 19:11

Monday, May 04, 2009 at 19:11
Sorry Ross should have looked at your profile mate ....Trevor and I have talked and I am not going to put my MU up to a tug with yours hahahahahahhha
Cheers Bruce
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Reply By: Member - Ingo57 (NSW) - Sunday, May 03, 2009 at 21:08

Sunday, May 03, 2009 at 21:08
Gday Ross,

Interesting read!!!!

Just curious, being a variable vane turbo do the vanes actually tilt to different angles through the rev range & was it priced much higher than an after market ball bearing??

Cheers Ingo



AnswerID: 363040

Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 21:27

Sunday, May 03, 2009 at 21:27
Hi Ingo

That is what happens vanes narrow and direct exhaust gasess onto turbine making it spool up quicker and reduce turbo lag.

This turbo is a ball bearing turbo

Didn't really look into other turbos as I have been aware of this set up for about twelve months and following other peoples results during that time.

The work I have had done gives me piece of mind and ensures engine longtivity (tongue in cheek).

I have owned the car since new so I know how it has been treated and serviced.

Ross
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Reply By: Con_Qld - Sunday, May 03, 2009 at 22:37

Sunday, May 03, 2009 at 22:37
Hi Ross
Where did you get your turbo fitted - name & contact no?
Many thanks.
Con
AnswerID: 363050

Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 22:51

Sunday, May 03, 2009 at 22:51
Hi Con

Mike Vine Turbo's
475 Redland Bay Rd Capalaba, QLD 4157 - (07) 3206 4799

Ross
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FollowupID: 630700

Reply By: awill4x4 - Sunday, May 03, 2009 at 22:42

Sunday, May 03, 2009 at 22:42
So how do you control boost pressure seeing the Navara uses a conventional wastegate type turbo?
Does the Navara ecu control the variable vanes? Are you measuring boost pressure at all?
Regards Andrew.
AnswerID: 363051

Follow Up By: Ross H (QLD) - Sunday, May 03, 2009 at 23:31

Sunday, May 03, 2009 at 23:31
Hi Andrew

The vanes are controled by inlet manifold pressure IE: I have a blowoff valve 2" on my inlet manifold preset to 15psi , a vacume/pressure line on my inlet maniflod runs to a bellows on the turbo that drives the vanes on the exhaust side. This is why the turbo spools up so quickly.
It is all a lot simpler than the standard setup and no restriction what so ever on the exhaust side of the turbo.

Ross
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Follow Up By: Ross H (QLD) - Monday, May 04, 2009 at 15:20

Monday, May 04, 2009 at 15:20
Sorry Andrew hit enter to quick last night.
That is my understanding of the set up am happy to be corrected.
My retention rate is like a plastic clothes peg at times.

One question I do have for you as I here you are a bit of a diesel guru........

Now I have fitted the bigger turbo would I achieve anything by going up a size in exhaust from 2 1/2" to 3"

Regards ross
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