1hdt comp truck engine

[hitech4x4]

im curently building an engine for my 80, i have a 1hdt with garret gt28 bb turbo 600,400 front mount intercooler, the injector pump is being looked at to get more fuel in, and of coarse 3in pipe,
once all is set up wat boost setting have u guys ran with these type of mods, and remember i dont care about daily driving.
any thoughts would be great thanks

[Sic Lux]

Have a read no doubt some info in there for ya http://www.outerlimits4x4.com/phpBB2/vi ... 30&start=0

[dumbdunce]

did you just guess for the turbo? it's a good idea to start with the kW you want and work out the turbo you need from there.

Start around 15psi and work your way up in small increments; depending on the limits of the efficiency of the compressor, anywhere up to maybe 25psi? watch the EGTs and adjust fuelling to suit. inlet air tem probes before and after compressor, and after intercooler, will give you an idea of the efficiency of the compressor, and of the intercooler, so you can tell whether your exhaust is hot because of the amount of fuel being burned (good - more power) or becuse the inlet air is hot (bad - less power). there will come a point where more boost = less power because the inlet air is hot and therefore less dense. you need to add the heat at the right time in the cycle.

an external oil cooler is also a good idea.

if you can afford dyno time, it will let you fiddle with the boost and watch inlet and exhaust temps, so you can find the optimum settings for that engine, turbo and intercooler setup.

[hitech4x4]

thanks, i was speaking to john at turbo glide at wollongong and he sujusted the gt28 it has some of his mods , dont ask me wat he has done
but he sujessted it will flow more than enough for wat i want
and i have axcess to a 4wd dyno when eva i want so thats good aswell