Outer Limits 4x4 Board

KiwiBacon wrote:

crunk81us wrote:I know it would be better in there, but look at my manifold.. how am i supposed to put it in that?

Drill a hole through the heat-sheild. A step drill gives a nice round hole in sheetmetal like that.

Yep - its only sheetmetal. This is what i did to my brothers GU, but i only ended up doing a slot wide enough to accommodate the fitting that holds the probe.



Pull the sheild off first and work out where the probe's going before you hack up the sheild though.

EDIT: Actually, i can't even remember if i cut a slot. I might have only cut a single hole for the fitting, roughly around where that spot weld mark is.

You can also drill the probe into the turbo neck.

Ok thanks guys, I've never worked on cast iron before..always just left it alone.

do i need to worry about the steel filings going thru the turbine?
if so, is there a way to do this without taking the turbo right off?

crunk81us wrote:Ok thanks guys, I've never worked on cast iron before..always just left it alone.

do i need to worry about the steel filings going thru the turbine?
if so, is there a way to do this without taking the turbo right off?

Plenty of people have drilled in probes with the turbo in place. If you have a cat converter it might trap the filings, but that's unlikely on a 1HZ. Cast powders up when you drill it, the turbine will have no problems blowing that through.

How i did it:

- Make sure the engine is cold (leave it overnight)
- Do the normal things like use a centre-punch and sharp drills
- Drill a pilot hole (use some grease or WD40 on the bit for the last 1-2mm where it goes through the manifold)
- I used two magnets from a HDD to catch swarf, sitting either side of the hole
- Use grease on the drill for the final hole to catch swarf - let the drill cut at its own pace, don't force it.

Make sure you use the correct size drill and tap for the probe coupling.

Well that sounds straight forward enough. I'll be much happier with it in the manifold. Thanks!

Ruffy wrote:

80's_delirious wrote:I would agree, sounds like too much fuel. I had the wastegate wired shut on my 1HD-T, peak boost changed from 15psi to anything from 18psi up to 22psi just by changing fuel settings, when it was producing 22psi, EGTs would climb extremely quickly

So you had a waste gate issue.. not a fuel issue!

no I had no issue with my wastegate, it was deliberately de-activated.

It was more a comment (poorly written) on the impact the quantity of fuel injected can have. to produce 22psi, I had wound the main fuel screw up a metric shitload. Changing only the fuel settings saw peak boost varied from 14psi to 22psi.

If crunk81us is producing 25psi , he must be pumping in a stack of fuel, wastegate issue or not.

[quote="Ruffy"He wont be able to produce 25 psi unless there is a problem with the waste gate.. regardless of being delivered.[/quote]

Could the temp probe be put in a plate and bolted on in place of the EGR pipe?

Or would it be better right in front of the turbo where it will get an average reading from all cylinders and not just cylinders 5 & 6?

I think I may have just answered my own question. Thoughts?

Not that it is likely to matter on a diesel as they barely need a wastegate, but on big HP petrol engines the angle of the wastegate is important, I have seen first hand where on a VL turbo that had overboost issues with a 48mm wastegate was rectified by adjusting the angle on the wastegate to the flow of exhaust gas. The manifold was an ebay stainless one, the vehicle I tune was the first VL in the country to run a 9 sec pass on 98 fuel and street ET's.

Cheers

Joel