The new tourer...

**c.h.i.e.f** · 27th January 2011, 08:10 AM

Originally Posted by rijidij

I bought one of these >>>> Digital Thermometer with 2 K-Type Thermocouple Sensors <<<< and it works really well. I mounted it on the dash with some velcro, but I had to get some longer thermocouple leads to reach into the engine bay. I used the leads with the bare ends and tucked them under the silicone hoses into the air flow, one post turbo/pre IC and one post IC/pre intake manifold.
I have a bigger IC, yet to be fitted, so I was curious to see what the actual performance of the current IC was to compare it with the new bigger one when I put it in.
The good thing with these digital thermometers is a function that displays the temp difference between the two leads, ie pre and post IC. With my current IC the temp drops ~80*-90* with heavy throttle up a long hill.
You might need something that reads more than 100*. The highest pre IC temp I've recorded is 140*.
Here's an example......

Boost 15psi
EGT 645
Amb temp 15*
Pre IC 140*
Post IC 55*
Difference 85*

Cheers, Murray

Thanks rijidij those thermocouples are something to look out for now I reckon. Have you tested what egt's you get by removing the IC just out of curiousity ? How are you finding the performance ?

**rijidij** · 27th January 2011, 09:51 AM

Originally Posted by c.h.i.e.f

Thanks rijidij those thermocouples are something to look out for now I reckon. Have you tested what egt's you get by removing the IC just out of curiousity ? How are you finding the performance ?

I've never run it without the IC, but it would be interesting to see what difference it makes.
I am very happy with the performance, I love driving it, on or off the road.

It'll be good to see what performance figures JC, Rovercare and other's come up with when they get their Isuzu's fully tuned and on the road.......Matt (Rovercare) seems happy to play with his knob.........Oops, I mean fuel screw

Cheers, Murray

**c.h.i.e.f** · 27th January 2011, 05:53 PM

I am thinking of bypassing it for a test run see what happens...... Hahaha fuel screw hahaha
Just a thought who has the highest egt's on there isuzu's ?
Im running 16psi 400°c after turbo (pre turbo readings this week sometime)

**Dougal** · 27th January 2011, 07:07 PM

I've hit 900C a few times accidentally. It seems to survive but I don't recommend it.
I run up to 750C routinely.

**rar110** · 27th January 2011, 08:59 PM

Originally Posted by c.h.i.e.f

I am thinking of bypassing it for a test run see what happens...... Hahaha fuel screw hahaha
Just a thought who has the highest egt's on there isuzu's ?
Im running 16psi 400°c after turbo (pre turbo readings this week sometime)

No intercooler yet.

Post turbo mine sits at low to mid 300 degrees around town, on the hw no load 375 - 425, minor hill fairly easily gets up high 400, towing a trailer on medium hill, warm conditions will hit 550 unless I drop it back to 3rd.

**rovercare** · 28th January 2011, 09:18 AM

Originally Posted by rijidij

Matt (Rovercare) seems happy to play with his knob.........Oops, I mean fuel screw

Cheers, Murray

I'd stick with the knob bit

I'll get spare time enough one day and spend a few hours with Joel on the 4 wheel dyno, then we'll have some facts

**c.h.i.e.f** · 28th January 2011, 10:20 AM

Dougal yours is 750° as a standard and it hasnt caused any problems

these are truely bullet proof.... I retract everything I have said about these engines (i admit I was wrong) I am very happy with mine at only moderate tuning

Rar110 was it you ruining a gt28 just out of curiousity?
Im curious to hear figures from isuzurover, rangierrover,Dranged,110.9d,justinc and bush65....

**c.h.i.e.f** · 28th January 2011, 10:24 AM

Has anyone managed to do a CAD for an adaptor plate to mount a td5 turbo to a turbo manifold ? Like dougal done for the t3 flange

**rar110** · 28th January 2011, 03:12 PM

Originally Posted by c.h.i.e.f

Dougal yours is 750° as a standard and it hasnt caused any problems

these are truely bullet proof.... I retract everything I have said about these engines (i admit I was wrong) I am very happy with mine at only moderate tuning

Rar110 was it you ruining a gt28 just out of curiousity?
Im curious to hear figures from isuzurover, rangierrover,Dranged,110.9d,justinc and bush65....

Yep GT28R (2560) on top mount T25 manifold.

**1103.9TDI** · 28th January 2011, 10:20 PM

Drove down to rocky a few weeks ago (just before the flooding) and noticed EGT temps rising, so much so that I was throttling back on some of the steeper inclines, to avoid exceeding 750Deg. Put it down to the warm weather, but did notice the slight smell of coolant, which made me suspicous. Engine temps were normal so I carried on as you do. Got to rocky and on closer inspection, an alloy feeder pipe exiting the intercooler had worn through, where it was vibrating against a steel bracket. No worries, just pulled the fuse on the pump, and ran back without the intercooler cooling. I reckon the difference in about 60Deg normal running, but when pushed, makes an even greater difference.
Easy fix when I got home, with a couple of Bearman's rums, delicious, and thanks again.....

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