Yet more turbo questions!

Have finished the turbo instalation, the results are truly eye-opening. :eek:It starts to build boost just off idle and the slightest stab on the pedal from any speed sees an almost instant climb to the wastegated 18psi. MARVELOUS!
Thanks to all who helped with information and advice, most notably Dougal, the fount of so much technical info, and the one who gave me the inspiration to bite the bullet and "go turbo", Bush65, steveG ,and flagg, all of whom were so helpful with all the little details. Cheers.:twobeers:
So, with all this new-found power, the standard N/A clutch is starting to slip once boost hits around 10psi, when accelerating up a slight incline from around 60 in top. In ,The 4BD1 Part Numbers Reference thread,Adrian18 has the following post;"extreme performance clutches 1100kg clamping force xhd p/n klr28003-1ax brought through abs brakes" is this 1100KG clamping force higher than the factory or the exedy pressure plate clamping force figures?

Good to hear. That's exactly what the TD04HL-19T should be doing.

I plan to get one myself at some stage. If you want to get really silly, a GT3582 would compound it nicely.:angel:

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Originally Posted by jackz

Have finished the turbo instalation, the results are truly eye-opening. :eek:It starts to build boost just off idle and the slightest stab on the pedal from any speed sees an almost instant climb to the wastegated 18psi. MARVELOUS!
Thanks to all who helped with information and advice, most notably Dougal, the font of so much technical info, and the one who gave me the inspiration to bite the bullet and "go turbo", Bush65, steveG ,and flagg, all of whom were so helpful with all the little details. Cheers.:twobeers:
So, with all this new-found power, the standard N/A clutch is starting to slip once boost hits around 10psi, when accelerating up a slight incline from around 60 in top. In ,The 4BD1 Part Numbers Reference thread,Adrian18 has the following post;"extreme performance clutches 1100kg clamping force xhd p/n klr28003-1ax brought through abs brakes" is this 1100KG clamping force higher than the factory or the exedy pressure plate clamping force figures?

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I don't know officially what the clamping forces are, but can tell you that an almost new genuine Isuzu turbo pressure plate (10"/275mm for the landy flywheel) slips with 95kg hanging off a 2m bar :eek:

Someone who's good at maths might be kind enough to do a calc on that...

Steve

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Originally Posted by Dougal

Good to hear. That's exactly what the TD04HL-19T should be doing.

I plan to get one myself at some stage. If you want to get really silly, a GT3582 would compound it nicely.:angel:

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:oSSSHHHHH! the wife would kill me!

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Originally Posted by steveG

I don't know officially what the clamping forces are, but can tell you that an almost new genuine Isuzu turbo pressure plate (10"/275mm for the landy flywheel) slips with 95kg hanging off a 2m bar :eek:

Someone who's good at maths might be kind enough to do a calc on that...

Steve

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Over 1800Nm.

I think I've got the same on my Isuzu (truck 4BD1T was 275mm in the early days). It has never let go by itself.

Very interesting as i have turbo d my 4bd1 a few years ago > But made my own manifold ect ,used a gt25 Garrett but have found not big enough . Going to install a 2871 Garrett very soon . wouldnt mind an automatic trans as i have a r380 in it now (done 120 000km ) but its the weak link any ideas regards graeme

I have an outback extreme 1100kg clutch, IMO a necessitiy if towing. With 2.8t off the back I can hold the foot flat in top gear and no slippage, at all. I had a turbo spec truck clutch which has no where near the clamping force and slipped after 3 months or so. The pedal is heavier, but not difficult, the bite is fantastic:cool:.

If going auto, A Toyota A440 (early 4 spd hydraulic box) or an A442 4 spd auto from an 80 series or early 100 series diesel with a compushift controller and stronger converter would be the minimum requirement.

JC

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Originally Posted by 110dude

Very interesting as i have turbo d my 4bd1 a few years ago > But made my own manifold ect ,used a gt25 Garrett but have found not big enough . Going to install a 2871 Garrett very soon . wouldnt mind an automatic trans as i have a r380 in it now (done 120 000km ) but its the weak link any ideas regards graeme

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That is not a good turbo choice. Bigger turbines produce less boost. Some light reading for you here: http://www.aulro.com/afvb/isuzu-land...rediction.html

Interesting with your turbo pressure plate jc. I don't know exactly how old mine is, but it hasn't been changed in the 100,000km or so I've driven it. Never slipped yet. Will see what the intercooler can do.