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Discussion Starter #1
Hey all, just trying to clarify and get an idea of the TB42's limits.

Basically the engine is a TB42E, GT35R, 440cc injectors (think), VLT pump, Haltech, 3" exhaust, intercooled, good cooling system.

What power could i expect from this combination? I have been quoted around 250hp atw safe, possibly 8-9psi.

Also what are the inherant weak points of this engine/drivetrain combo? I know of cracking heads and 'weak' rods - anything else to look for.

I would just like a nice reliable ride that isnt going to let me down when I am in the scrub.

Thanks in advance.
 

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sounds about right, for longevity i would decompress it slightly, rods are prob good for 300rwkw+, put a big cooler on it and keep the services up.
If you blow it up i have a TB42E for sale :D see classifieds
 

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Discussion Starter #4
Yeah, I would hope not to be doing an engine swap anytime soon, but want relaiable power (if there is such a thing)

Will see how we go with a tune.
 

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TB42 Turbo Conversion

Hey there i stumbled here looking for parts so i thought i would give you my opinion.

I have done a Turbo and Intercooler and EFI conversion to a TB42 GQ LWB. This vehicle was sad to say the least but with some trial and error i finished up with 170 RW Kw. It is not a difficult job but definitely a time consuming one. This engine has now blow a head gasket but my feelings were that is occurred before the conversion, i am now looking for some Low Comp Forged Pistons so i can refresh and balance the engine.

All the parts are accessible but you will need to make plenty of calls, I used the Intake off the Tb42E but the injectors need to upgraded and intercooler installed if your running a turbo or detonation WILL occur. Also needed is the electronic dizzy from the Tb42E. (petronix can NOT be used with an ECU)!!!! Intercooler is liquid to air which i custom make and a 3' exhaust.

Im using a cheap Chinese turbo which is the weak link in this conversion, it has a 10psi actuator but the waste gate holes are too small and dont allow the gasses to flow out fast enough . This causes it to boost to 14-16 psi (dont skimp on the turbo it will only bite you in the ass).So to give you an idea the engine is well capable but we cut a few corners which we are now rectifying. Compression MUST be lowered if running more than 8psi boost, a decomp plate can be used but this is also a short cut.

I did this conversion for a friend at no labour charge, it was an experiment to use my ECU but after alot of head aches on his behalf you could not wipe the smile of his face when he drove the vehicle. In 3rd gear you can take it off the clock!! (not advisible lol)

Would i recommend it??? YES if you have the money, the time or can do allot yourself. There are many more little alterations needed but if anyone is interested i am happy to guide you.
 

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Discussion Starter #6
Yeah i can understand that - but its a EFI model already, and its already been turbo'd. Just wondering the strengths and weaknesses in the TB42.

I have all the good gear on my car already, just needs a tune as its running slightly rich on boost than i would like. But will get a tune soon, see how much power it makes after that.

I dont agree with some of your statements though, high compression with boost is the way to go these days as tuning and fuels increase in quality.

As an example on of my freinds has a 400+hp 300zx only running 8psi through the VG.
 
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