Gq tb48 turbo

[mudbug]

Hi guys i have some questions I currently drive a GQ tb45 turbo I did this conversion August last year and , I am looking at increasing the power I have at the moment ( yes I have been bitten by the power bug and I think its terminal ) I am thinking of putting a GU tb48 in my GQ and plumbing it into the turbo I have now ( Garrett 3582 ball bearing water oil cooled )
My questions are
Would buying a low km tb48 and lets say new rings and bearings a general check of the engine and installing it into my GQ Auto wagon with moderate boost ( and getting from what I have read approx. 250 -270rwkw ) , would that be a cheaper option than trying to increase what I have now with moderate boost and a reliable 161rwkw out of the TB45 , I am looking at reliability so IF a standard tb48 turbo can get 250-270rwkw ( reliability ? ) would the TB45 with the equivalent money spent on to get 250-270rwkw or buying TB48 motor and converting, what would be the best option ????
Any guesses as to how much a low tb48 would cost and where would be the best places to start to look
Will the tb48 be an easy bolt in fit or is there a major conversion in front of me , I would like to keep my auto trans I have now ( GQ ) if possible
what would I have to do to the TB45 to get 250-270rwkw and any guesses to how much that would cost
Would the then TB45 turbo be reliable compared to a standard TB48 turbo
Now as far as the rwkw go I don't no how accurate it is with the TB48 turbo I have only just started reading up about this , who has done this conversion and will I get this sort of power ??
As far as a turbo for the TB48 will the Garrett 3582 be a good choice or will I have to source a better one ??
A this stage I am thinking the TB48 conversion might be a cheaper and more reliable source of gaining that extra fun factor IF its a straight forward conversion and IF the motor is cheap enough, one price I have so far for a low km TB48 is approx. $4gs is that good or bad

Power Hungry

[Dales300exc]

A good friend of mine converted his coil cab ute to 4.8. It was making 300-350 odd rwkw for a long time. The broke a ringland. But he drove it very very hard. After that he put about 20k into the engine and was making 550rwkw on e85. These are no exaggeration.

Something else to consider. This patrol was insanely fast, but when 2.5t gets up to stupid speed. Stopping it was very scary.

300 odd kw tuned and setup right will be reliable.

[mudbug]

A good friend of mine converted his coil cab ute to 4.8. It was making 300-350 odd rwkw for a long time. The broke a ringland. But he drove it very very hard. After that he put about 20k into the engine and was making 550rwkw on e85. These are no exaggeration.

Something else to consider. This patrol was insanely fast, but when 2.5t gets up to stupid speed. Stopping it was very scary.

300 odd kw tuned and setup right will be reliable.

WOW that is insane not sure as to whether I want to make that much power yet ( LOL sh#t yeah ) I don't want to start breaking to much ,do you no if its an easy bolt in conversion or if there is a bit of fabricating to do , A reliable 300 would be great after all its still my daily drive but as a full off roader that's a different story

[Uncle Festa]

I went and bought a TB48 to do just what you are proposing which I still have and it is for sale. It needs a full rebuild and I would suggest you are better rebuilding an engine, rather than buying a so called going concern. A wrecker will only ever give you a short term limited warranty generally 3 months and by the time you get organised and get the donk in yr 3 months will most likely be up. They will only ever give you a replacement donk which then means you have to do it all over again. At least if you rebuild a 4.8 from scratch using a good engine builder you know it is all good, you can run it in properly, etc, etc. The 4.8 donks had an issue with failing oil pumps occasionally as the one I have has happened. So if you buy a second hand one you need to check this before you buy. Oil pump comes as an assembly with the timing cover and is expensive new from Nissan.

Don't know what the most suitable turbo for 4.8 would be but there is a guy in Smithfield who rebuilds Turbos and is good to talk to. He may be able to recommend the appropriate Turbo to use. John at 'Precision Turbos' 0297565757

You should be able to buy a rebuild, get it all machined, etc and if you know what you are doing put it together yourself for 4-5K I would think. I went through all the pricing of machining and parts. I don't know where you are located but I do know a couple oh machining shops around Sydney who are suppose to be good. I also know a guy on the sunshine coast who I have known for a very long time and he knows his stuff, but he might be a bit expensive.

A 4.8 is much better and more efficient engine over the 4.5. Double overhead cams, 4 valves a cylinder, etc. All my research at the time to fit the TB48 was that it will fit straight up using the 4.8 engine mounts but as to fitting to yr GQ auto, I don't think so. I am guessing the 4.8 Flex plate is different/ bigger as they are with a manual set up ( manual 4.8 runs a 300mm clutch versus a GQ4.2 uses 275mm clutch. If you do this conversion it would be great result but I would also definitely fit a 5 speed tiptronic auto as these are much better than a 4 speed auto and you won't have any adapting to do. Shifter may be in slightly different position but that shouldn't be too hard to adapt. Also if I am not mistaken the 4.8 runs 2 oxy sensors but maybe yr 4.5 does too?? Obviously you will have to use/change to a 4.8 ecu and if you go with the 5 speed titronic you will have to use the right ecu for the auto.

I decided in the end to fit a Turbo to my TB42 on injected lpg as the 4.8 rebuild cost for me was not worth it even though I may have my GQ for a long time yet. I am very happy with the torque and driveability I now have. I am not wanting the power you are looking for. But I do understand why you want it.

Anyway let me know if you might be interested in the 4.8 I have or if I can help further. Also I spoke to a guy who is in QLD who did 4.8 into GQ conversion and he was very helpful at the time.

Michael 0417591746

[mudski]

Talk to this mob. http://www.jpc.com.au/ Have a look on his webpage, they turbo'd a TB48 for 559HP. This guy knows his shizz.

[threedogs]

a few of my mates have some of these insane Turbo patrols,
4.8s with de-burred blocks then enamelled, pulling 14 sec 1/4 miles
I'll PM details for you so you can have a chat with him

[jff45]

I'm interested in how your auto trans is holding up with the TB45 turbo. Did you do anything special to it like valve body or whatever?

[jff45]

I'm interested in how your auto trans is holding up with the TB45 turbo. Did you do anything special to it like valve body or whatever?

Never mind, I just saw I asked you this question previously and you replied to it already..