Finally going turbo

[Sharky1]

Funny thing Sharky the aim is to get the hot hot air threw the turbo.. you want the exhaust gas to cool after the turbo or you loose air density and that means less force and less spin.
Sure we're talking nano farts but if your talking tuned pipes on a gq oil burner then it's all sorta relevant.
Another addition is a turbo beanie to help hold heat in untill post turbo..

Yeah to a certain extent. But even then a manifold that gets hotter quicker is gonna do that better. Go too hot & you'll overheat the turbo. Too cool & it wont work efficiently. Like I said until I get it on & dial it in I won't what its doing. I don't wanna ceramic coat coz if creates other issues. Often it doesnt take well either. I'd sooner wrap it with insulative exhaust wrap if need be which is cheap & easy & just as effective if not moreso. I doubt the turbo will run too cool. Yes I agree diesel emissions are cooler than petrol. But its a mega high compression motor & a turbo by nature gets hot. The majority of ppl have issues keeping them cool.

I didn't want a cast manifold coz they sit the turbo 2" further back & higher up than the one I have which makes for lesss room & in most cases you can't fit a 3" dump pipe on. If I went low mount I could have used a cast manifold but then there's much more piping from turbo to manifold which is where it counts more on exactly the same principle of why positive displacement blowers work more efficiently than centrifugal ones.

[nissannewby]

So what afrs do you plan on aiming for? Do you have a power and torque figure in mind?

Interesting you keep talking about heat, a manifold that begins to glow red has a setup issue. Pressure= heat, pressure differential is how any form of forced induction works. So if the turbo is incorrectly sized you end up with high manifold pressure which equals heat and then a glowing manifold. Glowing manifold equals wasted energy.

[Sharky1]

You brought the heat topic up man. Yeah most of what you say is true but you're presuming all is gonna be wrong just coz it's a pipe manifold & that's not necessarily the case.

Man it's a budget build. If I was gonna blueprint it I'd spend a cpl of mths researching & planning everything & I'd blow more than $5k on the whole project. I'd custom build my own turbo & it wouldn't be a chinese one.

I expect to gain about 200NM of torque & prob 80HP at a guess. Like I said I haven't blueprinted anything here.

I dnt have time to do all that R&D stuff these days so I handed the project over to my mate who is a well known engineer in Perth who builds race cars & specialises in diesels. He gets flown around the world as the race team engineer for one of the cars he built. I'm just paying for it & fitting most of it.

[jff45]

Sigh...

[Sharky1]

I guess when u jump on ebay & search GU TD42 turbo components, you have to hope the manufacturer has put in the research & development. I know I'm taking a gamble here & I'm mixing & matching. We know what we're doing to the point that we're not going to run into any major issues. Of course things can always go wrong. It's a mechanical item. Could I get better results? Yeah probably if I spent more time doing my homework & more $$ custom building it for ultimate performance. Will I get good gains for what I'm spending? I believe so. I guess we'll find out in the next cpl of weeks. My manifold should be here by end of next week. Then we're fitting it the week after & hopefully it can be tuned that week too. I'll let you know the results. I won't have dyno figures or anything coz I'm a single dad & I run my own business & at this time of year its a stretch just to do this much.