Isuzu Trooper Owners Club UK™

little trooper · Newbie Joined: 01 Mar 2007 Posts: 9

Hi, I have been Looking around for what people have done regarding turbo boost pressure. Can anyone tell me what stock boost is and what they have increased to ?

I have carried out a few engine mods already by fitting an induction kit ( k&n ) and adjusting fueling.

I have ordered a boost control valve and gauge and am now curious to play with that but would like a starting figure or someones input first.

Thanks in advance Little Trooper

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hillbilly col · Posted: Tue Mar 10, 2009 21:37 Post subject:

i no gary820 has uprated his 3.1....fuel turbo boost and such so in case he doesn't see this and provide some help
it may be worth pm'ing him
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gary820 · Posted: Wed Mar 11, 2009 22:35 Post subject:

What i'd do is fit your boost gauge and check what the boost peaks at and what it holds at, then fit your boost controller so it matches what it was standard, you say fuel is already adjusted so thats a start. Go for a drive and adjust the controller a little bit, tbh you don't wanna go mad with it, few extra psi should do you, remember it's not a high performance engine so don't over adjust the turbo!!! i'm back to a standard turbo at the mo as mine let go on the M1. i'm actually in the process of sorting out a custom built one using the old housing just waiting for some funds. Wanting more boost but low down the revs Wink

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hillbilly col · Posted: Wed Mar 11, 2009 22:41 Post subject:

or get a 3.0dti with loads of power as standard iroc

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gary820 · Posted: Wed Mar 11, 2009 22:47 Post subject:

little trooper · Newbie Joined: 01 Mar 2007 Posts: 9

Fitted a boost gauge and control valve yesterday....

Went for a run at standard boost which peaked at 1.2 bar (17.4psi)

tuned upto 1.5 bar (21.7psi) and went for another run...

Cant say I noticed a real big diffrence, but it was going well with the first tuning I had done (fuel, induction filter) maybe a touch faster at peak boost which comes at 2300rpm
no smoking and no real lag.

Anyone think these figures are too high ?

AD · Posted: Thu Mar 12, 2009 6:25 Post subject:

How do you control and adjust the boost pressure? What controll's it on a standard (unmodified) engine?
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Hard1 · Posted: Thu Mar 12, 2009 13:47 Post subject:

little trooper · Newbie Joined: 01 Mar 2007 Posts: 9

I have just heard back from Isuzu and they have informed me that standard boost is 11.6psi at 2500rpm.

I am almost double that and think I may have to knock it down a touch as mine is a 95 plate and as stated above these have more power anyway.

I can't see the point in blowing it up as she has only done 69.k genuine miles from new !

Will let you know what happens.

GouldyGTR · * Joined: 11 Mar 2009 Posts: 39 Location: Somerset

i would think that the intake temp would be the thing you need to reduce, the TMIC's are pants on any car,

maybe larger turbo, better exhaust system (downpipe more than anything) , also just make sure you get enough fuel as going lean means going bang lol

ive been doing tuning on my last few cars and if you try and cut corners it just bites you back in the *beep*!!!

im going to look at better cooling for the TMIC, and look at increasing the boost and fitting a filter on mine

Jim

Blownoiler · Posted: Tue Jan 01, 2013 5:42 Post subject:

Mine ran 12 pounds of boost when I got it, I wound it up to 19 for a few weeks, then settled back to 12 because it's now summer here and I dont want to overheat the engine on the first 100f day

jacksdad1963 · Posted: Tue Jan 01, 2013 22:47 Post subject:

Hello there!
Just one question, why spend time and money on a 3.1? There's an old saying that sums up what you are doing......

You Can't Polish a Turd! hilarious

The 3.1 is a ropey old chugger that has one saving grace: reliability, why ruin the only thing its got going for it!

A standard 3.0 gives 159 bhp and 245 lb torque at 2000 rpm, you will never see anywhere near that, sorry! Laughing

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1999 3.0 TD Duty SWB
3" Body lift, 3" suspension lift, diff dropped, balljoints flipped, extended panhard, Tree sliders, Superwinch, +2" Pro Comps, 33" Mudders: Nearly finished!

Blownoiler · Posted: Wed Jan 02, 2013 3:24 Post subject:

jacksdad1963 · Posted: Wed Jan 02, 2013 10:21 Post subject:

Ok, I'll stop winding you lot up Laughing

Must agree with the veg oil, I miss my old peugeot 405D, used to just pour filtered cooking oil straight in, did it for 2 years then scrapped it due to chassis rust Crying or Very sad

An X5?.... so you don't drive off road then! hilarious

Hope its not too hot for you lot in Oz....must be so hard for you!
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1999 3.0 TD Duty SWB
3" Body lift, 3" suspension lift, diff dropped, balljoints flipped, extended panhard, Tree sliders, Superwinch, +2" Pro Comps, 33" Mudders: Nearly finished!

bigb · Posted: Wed Jan 02, 2013 10:29 Post subject:

better leaving it be,if you want a motor to constantly be doing stuff to,buy a 3.0....... Laughing