Tb42e power and response up grades

Why wouldnt a 4.2 carb exhaust fit on a efi?? Or even a td42 set up obviously no dump.

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Originally Posted by healy

Sorry fellas 300 would be the absolute max it was more of I dont want more than that 200 to 250 would be ideal and im not talking at the wheels so im guessing around 190 at the wheels would be where it probably ends up I think from memory the tb42e is roughly 145 standard no doubt its lost around 10 over the years. By taller gears you talking diffs? Or gearbox? Or both? Im gonna change my 3.9s to 4.3s as ive still got the crown and pinions from my old rb30 I dont want to go bigger because I already have 4.3s ive set my car up so far on an unbelievable budget to get it where it is she is a very heavy girl at the moment George. Power isnt my main concern but as I understand you cant just add torque with no powergains. Thats why I am asking you blokes as I have no knowledge in this field. I really want response off the pedal and torque obviously in my mind power has to come with that. Am I right or wrong? Id much prefer a supercharger as thats gonna put the torque up more than a turbo I think but then again the turbo is cheap. im fn confusing myself now. Sorry if Im making no sense

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Originally Posted by healy

Why wouldnt a 4.2 carb exhaust fit on a efi?? Or even a td42 set up obviously no dump.

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efi extractors need a o2 sensor bung mate, they're only worth $5 so if you got a cheap set off a carby or td you could just drill and weld in the bung.


Yeah heals, i was talking diff gears mate. Mist people go turbo coz it's cheaper to setup even tho a charger would work better i haven't seen many, actually 1 td42 with all plasmaman gear on it. I was pretty sure the tb42 had 125kw at the flywheel so probably only around 80rwkw if your lucky lol. I can see that your doing what you can for sweet eff all mate but that gt42 is a massive turbo and wouldn't start spooling till 5k i rekon haha . Anyway mate your pretty limited with what you can do without spending a fair few $$$ but imo you should forget about power figures for now and focus on what the long term use of the truck is going to be to work out how your going to set it up. Think of torque as pulling power, the more torque you have it should accelerate faster and hp/kw is the by product of that at the peak of your rev range. Imo for now just fit the diff gears, that should make it quicker off the line and make it a bit more responsive for the time being. BUT remember everything is about sacrifice so tall diff gears will make you have less top speed, more power = more fuel consumption so work out what you want so you can find the happy medium.

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Originally Posted by Alitis007

efi extractors need a o2 sensor bung mate, they're only worth $5 so if you got a cheap set off a carby or td you could just drill and weld in the bung.


Yeah heals, i was talking diff gears mate. Mist people go turbo coz it's cheaper to setup even tho a charger would work better i haven't seen many, actually 1 td42 with all plasmaman gear on it. I was pretty sure the tb42 had 125kw at the flywheel so probably only around 80rwkw if your lucky lol. I can see that your doing what you can for sweet eff all mate but that gt42 is a massive turbo and wouldn't start spooling till 5k i rekon haha . Anyway mate your pretty limited with what you can do without spending a fair few $$$ but imo you should forget about power figures for now and focus on what the long term use of the truck is going to be to work out how your going to set it up. Think of torque as pulling power, the more torque you have it should accelerate faster and hp/kw is the by product of that at the peak of your rev range. Imo for now just fit the diff gears, that should make it quicker off the line and make it a bit more responsive for the time being. BUT remember everything is about sacrifice so tall diff gears will make you have less top speed, more power = more fuel consumption so work out what you want so you can find the happy medium.

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Cheers thats what I was thinking about the exhaust. Thanks for the info aswell mate I appreciate it. Gears It is then. I thought that turbo sounded abit big. Hopefully parts will come past in time and I can collect and store over time.

yep generally 70-80kw at the rears from a stocker.

if your running 3.9 gears even with 31's it will feel slow, very rough guide 33"s are best on 4.3 diffs and 35"s on 4.6 thats to keep the gearing at around std levels,

the exhaust is the same tb42, tb42e, tb45e, td42 only catch is you may have to add the bung for the o2 sensor but thats about a 10 min job

and yes that means a td42 turbo kit will bolt up, just gotta fab a few pipes and oil lines

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Originally Posted by billyj

yep generally 70-80kw at the rears from a stocker.

if your running 3.9 gears even with 31's it will feel slow, very rough guide 33"s are best on 4.3 diffs and 35"s on 4.6 thats to keep the gearing at around std levels,

the exhaust is the same tb42, tb42e, tb45e, td42 only catch is you may have to add the bung for the o2 sensor but thats about a 10 min job

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Yeah I know ratios on diffs etc lol I thought he ment geaebox as get it worked with a shift kit etc thanks

If u turbo the efi do u need a piggy back ecu. Can I convert my carby tb42 to efi and turbo?

Anything over 3-4 psi you will need an aftermarket ECU. The stock ECU can't handle much at all. It will be a costly exercise to convert to EFI then turbo. Cost wise you'd be better off going straight gas research turbo. I was in the same boat as you, only mine was already EFI. It worked out cheaper to just buy a TD42t. I have a complete TB42e setup for gas sitting in my garage if you're interested.

Wat you chasing for the gas setup?

If you turbo you'll need to either go piggyback(wolf, megasquirt etc) or Nistune.

Nistune is good because it isn't very intrusive and is local.
Wolf are based out of Bayswater VIC, so you can get local support if need be.
Megasquirt is very customisable and you can build it yourself to your specs.