ESE's works engine tuner

[Drew]

Can get exhaust temp sensors for diesel motors. Do petrol engines not have them?

[TZ350]

I am sure they do but I don't know what to buy or where to get it or how to log the data.

[Drew]

I am sure they do but I don't know what to buy or where to get it or how to log the data.

Ah, yes I see the problem.



Sinks away to continue trying to learn something from all the clever cunt.

[Farmaken]

How about this : Check out

http://thesensorconnection.com/categ...all-egt-probes

They list a two stroke specific sensor and also do data loggers

[Yow Ling]

these guys make nice egt stuff
http://www.exhaustgas.com/ProductDet...pID=&BasketID=

[kel]

re the port under the exhaust port, how would this port be orientated?

No takers?
I dont think the transfer port under the exhaust would work (in a conventional setup). Maybe splitting into two ports and aiming low and wide i.e away from the bore centre line might work?
If they were angled straight down the middle then they'd surely work against the action of aux transfer purging effect
If they were angled steeply up then too easy to short circuit straight out the exhaust port
Plus opening so late in the cycle I'm guessing they would rely heavily on the expansion chamber drawing the charge through, which just makes the above worse?

[TZ350]

Rob Metkemeijer's MB40 prototype engines are cast using the lost-wax method. Below you see a mold with exhaust and transfer cores, a wax cylinder and the end product.

Hopefully Frits or someone who has one of these can tell use more about the transfer angles.



It has been done, Ok so its a model aero engine, but the idea must work.

And it looks like the exhaust is so wide (no piston ring) it covers three transfer ports. The middle one under the exhaust port looks relatively flat, the side ones look steeper.

Frits Fos cylinder.

[diesel pig]

these guys make nice egt stuff
http://www.exhaustgas.com/ProductDet...pID=&BasketID=

I have one of these they are very good. I have not melted a piston since I have had it. I have had DNF's since but the EGT help there too because I knew it was not a melted piston before I stop rolling since the gas temp's were not high enough.

[bucketracer]

What about one of these.

Lap times with splits and all sorts of data acquisition like CHT, EGT etc.



http://www.xtracing.com/en/gpxpro/features.php



For each session recorded in Circuit Racing mode, the GPX has the ability to graph a map of the track on screen, without even uploading to your PC. In addition, you have the ability to play the lap in real time with your RPM, speed and split times all displayed on screen at the same time.

The GPX universal-input channels offer flexible digital/analog recording capabilities, record any and everything you are interested in seeing on your race vehicle.

With GPX, out of the box you have the ability to record gear, throttle position, wheel speed, RPM, temperature, pressure and suspension data... all with configurable alarms.



The Data Acquisition menu allows you to define, calibrate and set the sampling rate for all of the data you're wired to collect. With a range of 5-250Hz, the GPX gives you the freedom to decide how much data you want to collect. Also available are temperature and switch alarms which you can customize to alert you of dangerous vehicle conditions.

Pricing, USD

[teriks]

Hopefully Frits or someone who has one of these can tell use more about the transfer angles.



It has been done, Ok so its a model aero engine, but the idea must work.

I never saw it in person, only exchanged a few words with Rob about it when it was in testing. If I remember correctly, it made good power on the dyno, although it didn't live up to the dyno results in flight testing at the time.

I guess Frits will correct me if I'm wrong

[Moooools]

What about one of these.

Lap times with splits and all sorts of data acquisition like CHT, EGT etc.



http://www.xtracing.com/en/gpxpro/features.php



For each session recorded in Circuit Racing mode, the GPX has the ability to graph a map of the track on screen, without even uploading to your PC. In addition, you have the ability to play the lap in real time with your RPM, speed and split times all displayed on screen at the same time.

The GPX universal-input channels offer flexible digital/analog recording capabilities, record any and everything you are interested in seeing on your race vehicle.

With GPX, out of the box you have the ability to record gear, throttle position, wheel speed, RPM, temperature, pressure and suspension data... all with configurable alarms.



The Data Acquisition menu allows you to define, calibrate and set the sampling rate for all of the data you're wired to collect. With a range of 5-250Hz, the GPX gives you the freedom to decide how much data you want to collect. Also available are temperature and switch alarms which you can customize to alert you of dangerous vehicle conditions.

Pricing, USD

Go hard or go home.

http://www.msel.co.nz/epages/motorsp...ducts/MOT18016

[wax]

Why not just use a mychron 4

[Flettner]

The LINK will data log as well.
Frits, what is the out come of this FOS? cylinder?
Considering this type of cylinder is keeping me awake at night, I need some sleep.

[F5 Dave]

A snip at eight grand, good one Max.

[wobbly]

Re egt and data logging.
The ONLY egt probes to use are the ones from Ex Gas Technologies, their Stingers are guaranteed for 2 years and I havnt managed to kill one in 5 years.
The twin screen 52 series Digatron kits they sell on EBAY are about 1/2 the price of the GPX and are easily the best bang for the buck.
The Sensorconnection guys sell LCD kits that do temps etc but dont have anything like the power for the money.

Air cooled race engines are thermally limited to the extent we HAVE to use fuel to cool, rather than make serious power.
On the dyno and on the track the KT will fade badly as soon as the pipe forces it to make any more than around 16Hp on direct drive.
Adding more fuel cools it down enough to get it to finish a race, but then its slow.
Dropping the peak power in favour of a wider average ,lower, powerband will allow the cooling system to cope better and the power stays consistent for longer.

Just an observation re the latest tangent some of you guys are lurching off on.
It amazes me that before most have a really good understanding and working knowledge of what amounts to pretty simple normal two stroke port technology, we now
want to launch of into the detail of seriously off the wall geometry's, that are so esoteric you cant even get an SAE paper that researches the detail.
I know a transfer under the EX is damn interesting, but I cant help but think that if all the effort was spent discussing and then doing the simple stuff better, we would already have reliable 35 Hp buckets.