Got Over 400kw Atw?

[HYPED6]

EGT's are and must be measured out of the head and on each cylinder. If say cylinder 4 gets too hot and the rest are ok, then richen up just cylinder 4 under the boost levels where it is a problem.

Get it within where you need it, and keep tuning knowing your number 4 piston is safe and happy and you can keep leaning on your cast pistons.

Have a look at this video. Its not an RB but still a cast piston and standard 2.5 probably made in the same factory as nissan pistons.

This engine eventually died from a broken rod bolt after the owner held the engine over 9000rpm for about 15 seconds doing a skid.

All the pistons where perfect after 2 years of abuse with power levels of around 650rwhp.

EGT's never went over 800c when raced

O yeah. Watch the dyno on the first run....... then watch me crap my pants.

[R31Nismoid]

So just drag and usual hard street etc?

[HYPED6]

Yeah pretty much what we all do at some stage or another,

Willowbank a number of times. 10.2 @ 145 was the best. A lot of spirited street driving and power cruise's and track days at queensland race way.

The car wasnt diven every day, but is definatly a testiment to what can be done to a standard cast piston when achieving 400rwkw.

[Rolls]

EGT's are and must be measured out of the head and on each cylinder.

do you measure them individually using a heat gun?

[DCIEVE]

thermocouples...

[HYPED6]

Yeah thermocouples.

A heat gun will only tell you the component temp of the exhaust manifold.

A thermocouple will tell you the gas tempreture inside the component.

We use a tempreture logger with 8 channels the plugs straight into my laptop. They are pretty fast and super accurate

Edited May 17, 2011 by HYPED6

[Rolls]

How much is decent data logging equipment like that worth? Certainly be a worth while investment.

Also how do you attach the thermocouples?

[TiTAN]

they screw into the exhaust manifold runners like o2 sensors except smaller.

[Rolls]

they screw into the exhaust manifold runners like o2 sensors except smaller.

Ah so you have to drill each runner, bit of a pain, though guess it is cheap insurance.

[HYPED6]

Thats correct. We use a 5mm metric thread in our sensors and just weld a nut on each runner.

It does sound like a pain, but Id rather pull my exhaust manifold/manifolds off than clean small pieces of melted piston out of my sump.

Most people just include it in there next build or turbo up grade.

For our setup we paid around the 2k mark. That was a few years ago now. The sensors have had a flogging with almost every fuel you could think of and they are still perfect.

[zoidbergmerc]

would it be possible to make a sandwich plate with egt sensors in them?

How big are the sensors?

Edit: 5mm

You must have posted as I was typing

Edited May 17, 2011 by zoidbergmerc

[r33_racer]

Similiar to on my car Rolls, whether you saw or not?

In front of the windscreen you can see them bundled up.

You drill and tap a hole in each runner, pretty well same distance away from port so temps are equally measured. Actually I guess only if the runners are thick enough, otherwise weld on a nut or machine up a bung and tap a thread in that and weld it over the hole, which is what I did with my extractors.

[DCIEVE]

My set-up was under 1k when the dollar was pretty weak, only downside is the outputs can't be fed into the ecu so I have to log egt separate to everything else. The kits come with everything you need inc the bungs, no need for custom bits.

[HYPED6]

I know there is a locally built unit that is in testing at the moment that will offer 0 - 5V output with multi channel EGT's

Im sure you will hear about it when it is released.

[WHITER33GTS-T]

My set-up was under 1k when the dollar was pretty weak, only downside is the outputs can't be fed into the ecu so I have to log egt separate to everything else. The kits come with everything you need inc the bungs, no need for custom bits.

Where did you get your setup from...?

[tricstar]

My set-up was under 1k when the dollar was pretty weak, only downside is the outputs can't be fed into the ecu so I have to log egt separate to everything else. The kits come with everything you need inc the bungs, no need for custom bits.

where did you get the kit from ??

oops didn't read the above post first

Edited May 17, 2011 by tricstar

[Reegz33]

standard crank, tomei rods, wiseco pistons, sard 850s, complete tomei topend with 10.8mm 260 pro cams, ported, 2 garret gt2560R - 10 roler bearing turbos @ 25psi, apexi power fc, 419awkw

[FineLine]

Fail! 3&1/2 inch dump is restricting. New dump on the way. Do it all again.

sigh....

[bigmikespec]

Fail! 3&1/2 inch dump is restricting. New dump on the way. Do it all again.

sigh....

Go 4" Noel and wind it up!!!!! I did a quick search and it seems no one has really taken the plunge and gone with the GT3788R.

[Lithium]

^ Thats what I thought too, though I was quickly corrected..

At what point did the dump pipe become a hold back? I didn't expect to hear that, it must have been a huge amount of power!