Thread: Hori Turbo Throw Together

Originally Posted by isuzurover

You can't destroy a turbo that way.

Surge then? I'm new to turbos :S

Don't be scared to play around with it. In my experience it won't self destruct in a couple of seconds if you hit 750degC or 20psi.

IME, EGT will creep up slowly if you're loaded and foot to the floor for a few minutes, so even if you tune to XXXdeg you'll likely see over that if running flat out for an extended period.
Doesn't mean you have to tune super conservatively though. As Brian said, you can control the EGT with your right foot.

On the flat, I can go through the gears until I'm doing well over the legal speed and never get near 700deg. Load it up with a decent trailer/van and/or an incline and I can see 750deg after a couple of minutes if I'm not paying attention.
In that situation I drive with half an eye on the EGT guage and lift off the throttle or change down (whichever is appropriate) when its ~700

Not saying mine is particularly well tuned or that I know a huge amount about tuning, but its the best I got to after playing around with it for a while.
I'm also running with the wastegate wired shut which I know its not ideal, but its been very reliable, goes well and I've just never got round to moving on from that. Like the intercooler thats sitting on the shelf

In your situation I'd be aiming for 20psi and fuel it up until you're seeing visible smoke (as long as the EGT does't go stupid). Then play from there.

Steve

Originally Posted by BadCo.

Surge then? I'm new to turbos :S

Sounds like you have been reading too much petrol turbocharging info. Diesels do not regulate airflow so it is not a problem.

The worst that could happen is you might blow a hose off if you didn't tighten all the hose clamps...

Boost does not hurt engines or turbos. It is heat that kills both usually. If you close the wastegate on a small turbo like that and overboost it, you will fall off the end of the compressor map and the turbo will be inefficient. That means it will generate lots of heat but little or no additional boost. Short term for testing purposes it will do no harm. Long term it could do some damage but we are talking long term (Hours or days) of driving.

Awesome, thanks for the info gents.

And I don't read about petrol turbos haha

Sent from my Nexus 4 using AULRO mobile app

Tuning today!

With 1.5 turns up my test hill I'll hit 500C at 18 PSI in fourth gear. In third gear it will fly straight to 18 then drop back to 16ish until I change up to fourth.

With 2.5 turns I'll hit 600C at 20 PSI but I get a wierd spike before I am on full throttle.

There is smoke before boost but nothing once on boost.

I really need a better hill and another couple of eyes haha

2.5 turns may be too far. Do you have a trailer you can attach to the back to help with tuning? Or half a tonne of wood/bricks?

Originally Posted by isuzurover

2.5 turns may be too far. Do you have a trailer you can attach to the back to help with tuning? Or half a tonne of wood/bricks?

Still only have the pintle and no army trailer and no large heavy object to load in the back. I'll try and source something during the week.

I think the clutch has started to slip now too. I've had issues trying to bleed it as well, not sure if it is related.

I'll half a turn back and see how that goes.

Here is a little video, its hard to record with one hand whilst driving haha

https://goo.gl/photos/jMrD4JMVtHHfPRqRA

With the clutch slip, make sure you've got sufficient free play at the top of the pedal travel. If not it won't release pressure out of the system properly.
Good chance it just can't cope with the torque though.

Steve