Outer Limits 4x4 Board

Sounds good, i come from a Petrol background so im still learning i just assumed lean on a diesel meant High EGTs.

Im only planning on running up to 10psi to begin with with an intercooler. I will probably setup a permanent EGT probe and display in the exhaust manifold rather than the turbo as im making the manifold my self.

Its for towing/daily so i want it to be OK under long high loads and reliable. But have some extra pull to pull the heavy trailor + car. So im not looking at going stupid.

I also have a WB02 sensor/controller/display. According to tech edge its ok with lean burn engines and diesels. Not sure how usefull it will be.

gearb0x wrote:Sounds good, i come from a Petrol background so im still learning i just assumed lean on a diesel meant High EGTs.

Im only planning on running up to 10psi to begin with with an intercooler. I will probably setup a permanent EGT probe and display in the exhaust manifold rather than the turbo as im making the manifold my self.

Its for towing/daily so i want it to be OK under long high loads and reliable. But have some extra pull to pull the heavy trailor + car. So im not looking at going stupid.

I also have a WB02 sensor/controller/display. According to tech edge its ok with lean burn engines and diesels. Not sure how usefull it will be.

it's probably not necessary to build an entire manifold - either an adaptor or modifications to the existing manifold are sufficient. you can weld to the cast iron manifold with the appropriate stick (better results than MIG/MAG) as the manifold doesn't get anywhere near as hot as the manifold on a petrol turbo engine. If you put the EGT probe pre-turbo, add maybe 50 - 75 degrees to your safe upper limit. post turbo is safer, if less accurate - if by some chance your sensor breaks/crumbles, it won't take out the turbo with it.

bin the WBo2 (or leave it on your race car) - it's a waste of time monitoring exhaust oxygen in a diesel. EGT for a diesel tells you what lambda dells you for a petrol engine. 99% of the time a diesel runs very lean, it only goes rich when you are on full throttle - and then your EGT shoots up.

if you are super keen on building a manifold from scratch, try and find a set of extractors to chop up, that way you get the header flange and a stack of bends pre-built, it's just a matter of cutting out a turbo flange and some creative welding. with the 2H there is space to go high or low mount - my advice is to go for high, it gives you more space to play with and you can send the oil return through one of the side covers rather than havin got take the sump off to weld a return in.