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Discussion Starter · #1 ·
Ok after playing around with my gq td42t yesterday on the dyno I found that my diesel pump is not as good as I'd hoped .... So I think it's time to buy a modified diesel pump the problem I have is I don't really know much bout diesels and I don't know what I'm asking for or if what they are selling me is going to be the right thing for what I want ..... Baisicly I want to run a aftermarket Garrett turbo boosted up with my front mount cooler n stuff but I want the pump to be big enough to handle anythin I can throw at it ..... Not limited to what power I can make out of it ..... Is there any key elements I should ask for ? I'm from Geelong in Vic so I think I'll speak to Mark from JPC and see what I should do but can anyone else recommend any body to speak too ?
 

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Ok after playing around with my gq td42t yesterday on the dyno I found that my diesel pump is not as good as I'd hoped .... So I think it's time to buy a modified diesel pump the problem I have is I don't really know much bout diesels and I don't know what I'm asking for or if what they are selling me is going to be the right thing for what I want ..... Baisicly I want to run a aftermarket Garrett turbo boosted up with my front mount cooler n stuff but I want the pump to be big enough to handle anythin I can throw at it ..... Not limited to what power I can make out of it ..... Is there any key elements I should ask for ? I'm from Geelong in Vic so I think I'll speak to Mark from JPC and see what I should do but can anyone else recommend any body to speak too ?

one word, DURAMAX!
 

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BS! the TD42T can pump out some bloody good figures without going to the extent of a 15K conversion. Plus it will still be reliable.
 

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Discussion Starter · #5 ·
Yeah I really wanna know what ppl have done in the past and what the weakest links are .... And what to look for .... This is the first patrol I have had and the first diesel I have modified so I'm really tryin to do as much research as I can and find out as much as I can from other ppls experiences
 

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Discussion Starter · #7 ·
Yer I have a new injectors in it at the moment I'm thinking go to JPC and get there "race pump and injectors "
 

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Yeah I really wanna know what ppl have done in the past and what the weakest links are .... And what to look for .... This is the first patrol I have had and the first diesel I have modified so I'm really tryin to do as much research as I can and find out as much as I can from other ppls experiences
remember diesel injector pumps are very clunky mechanical things. Even the first Motec ever made with it's screwdriver "programming" is more configurable than a diesel fuel pump. The pump, up to a point, needs to be sized to the application. Think of it as a combined single barrel carby and distributor. now with the varying amount of boost you can put in a TD42 what you're asking for is one of those you can fit on a 202, 253 and a 308 and it has to go like stink on all three. You'd probably get it driveable on them but its not going to be optimal.

So if you want a pump which can handle everything you can throw at it then you'd better throw all of your money at the rest of the package too.

You need to study a bit more and come up with a budget and build plan (in that order).
That is unless you have $30k to throw at it, in which case you're gonna blow the damn thing up if you aren't experienced with tuning one right at the edge of survivability.

In order the weakest points are:
Wallet.
clutch.
front CVs (but only if you have a front locker and reverse and/or turn tightly with it engaged.)
everything else is good for four hundred horsepower with sensible driving technique and sensible wheels.
(now I notice your signature... Budget a few grand to build a front diff. cvs, hubs, brakes, bracing)

That's about all the advice you'll get for free, go searching and reading there's a lot of info on here, and go see some experts and buy some stuff off them and they will provide more guidance.

We've got a clutch we're testing in a very abusive situation shortly, I roasted a super heavy duty one. With those wheels if you're serious with power you're gonna need something special.
 

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Discussion Starter · #9 ·
Well lately I've only been driving on my 35's for that reason exactly !!! I don't have a front locker and (touch wood) I haven't had any dramas with my front cv's although I do keep a close eye on them and try take it easy full lock and dropping the clutch ect.... I have spoken with mark from JPC who is ment to be the guru in this type of stuff and he has recommended a custom turbo n diesel pump n their injectors and with a tune they have been making around the 180rwkw mark but I just want a little bit more info before I make the jump n blow a heap of cash on parts that I could have got from somewhere else for a fraction of the price ..... And as for a budget I don't really make a budget cos I blow em out anyways my budget is "what ever it takes till I'm happy"
 

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is the pump on the later 4.2 black top motor in the GQ the same as the GU pump??
 

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tbh mate any onraod drivability and reliability is affected way too much 150rwkw is ****loads for these engines and its not the power youll need its the torque and at the level is plenty otherwise youll **** it up and wonder what happened unless your not driving it on the street anymore its pointless having 180+ kw may aswell by a western star cos thats how much fuel youll chew and i remember another guy making the comment " i have 170+kwish and in 4wd it spins 1,2,3 and 4th now having that power when your stuck is useless" and there was some more too it. best option is get a gu pump has the 11m kit can get 150kw with it will not know yourself going from the gq pump to the gu turbo one and source a decent turbo depending on where you want the power low, mid or higher up in the rev range and an intercooler to suit , if your doing slow driving then you will need a w2a cooler otherwise a2a is ok as well if cash isnt a prob get a laminova cooler mine sees less then 20c above ambient on highway at 18psi egts are 450ish.
likewise research will help you.

cheers
 

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If yuor talking N/A then yes but otherwise no

One is 10mm and the other 11mm
so the only way to get a 11mm is to get a factory GU 4.2 turbo pump.. or mod the GQ one to 11mm and put a compansator on as well.
 
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