New engine build Scania DC1601 for our semi truckpuller.

Well I think the story to the tyre size is that a long time ago there where some truck pulling teams in Holland running there truck just 4 fun with no rule book so I think one day they come up with a plan lest start a competition taking measurement on parts that common used on the trucks and set this as a limit.

If there is a European rulebook on truck pulling most of it will be based on the NTTO and VTN rulebook as far as I know.

You can debate is it a truck or half tractor. One of the good things about the big tyres on the back of the truck is that it still provides a load of traction on a lose track making it possible to run under bad track conditions making the spectators and organisations happy and we love the after party after we had some fun on the track.:Cheer:
As for clay a good road legal tyre with minor modifications will work just as good as the big wheels we use.
 
I would have thought that with the hitch height that you guys run standard tires would be okay, there is not an association over here that allows tire modification, and hitch height ranges from 16-20 inches.
 
20” hitch height that’s low. The hitch height on the trucks we run must be about 44” and with this height and the ability to come off the clutch aggressive while making boost pressure very easy we will be able to lift some type of pulling sled of the ground for the first 15 meter on the track or so.
Some pulling sled operators understand this trick and start putting 1200Kg on the front of the sled to prevent this and the result is that’s on some tracks we pull a small wheelie @ 15 meter on the track as the sled pulls the rear of the truck harder to the ground.

Well for traction. The profile and grip there is not a large difference between normal road tyres and what we use. Main difference is that the ground saving tyres we use are able to let go of mud as road tyre will fill it self up to a point it no longer grips into the ground but this will only happen if the track is to wet.
The only advantage with the big tyres can be that the surface is bigger making it easier to stay on a soft topsoil like on wet sand or when the under soil is very soft and loose but for this we need to go extreme low in air pressure always running the risk that the tyre will be damaged as we use glue to prevent the tyre from slipping in the rim and parts of rubber can break of the tyre sticking to the rim.
As for last year 2013 team start saving of there tyre profile and this will make it easier to maintain wheel speed on the end of the pull and it dos not make lot difference on traction in general as long as your engine has the power to spin the wheels fast so it looks like we are slowly going towards what common in practice on prostock tractors.

In general more tyre profile will dig a lot better bigger hole throwing all the lose stuff in front of the sled lifting the sled even more reducing the hitch height even more.
 
We used to run the higher hitch and the long chain like you guys do, but insurance wouldn't cover the chain extension so we hook from the standard length chain now.
 
Interesting about the insurance and the chain extension. For safety I like a longer chain as the sled operator has a bit more time to react when a pull goes bad for example a part of the drive train snaps and its not funny if a 20 Ton sled kicks you in the back @ full speed. You never know where you end up.

What about the pulling sled over in the US and Canada. Do the have a ESD on the sled?
The hyprosled we use on most of the pulling events dos not move a weight forwards on the sled but lowers it self hydraulically to the track and in a emergency event the sled can drop it self down with it full weight in a split second and it will stop you dead on. Also this type is pulling sled is fail save so if the sled loses power to the controls it will also drop it self to the ground not having to worry that you will jump over the hill on the end of a pull, we seen this happen a couple of times last year in the hobbysport class where the driver do not have a lot experience not noticing that the sled is not slowing you down due to a problem.

This is what coming up next on the motor sport agenda. Some of our team members are participating in this rally like Aart Schoones one of our team captains.

https://www.youtube.com/watch?v=JyXluAkXI5U
 
Latest project. 13L Scania XPI race engine. To bad the electrical fan running of the mains refuse to work so we could not load test the engine. Well maybe next week we have better luck.

[ame="http://www.youtube.com/watch?v=NF1U1NoAWnQ"]http://www.youtube.com/watch?v=NF1U1NoAWnQ[/ame]
 
Yesterday we load tested the Scania race engine up to about 500kW. The numbers are looking good and the engine is nor ready the be installed into the race truck.

[ame="http://www.youtube.com/watch?v=-q4b7FR-KCM"]http://www.youtube.com/watch?v=-q4b7FR-KCM[/ame]
 
Just some pictures of Billed compressor wheels in preparation in what is to come for 2014:rockwoot:

Foto550-NRWCE8SX.jpg

Foto550-4Z43YJPV.jpg

Foto550-77WSH8TF.jpg

Foto550-SIQUO4YW.jpg

Foto550-ZSTJRVRD.jpg

Foto550-OQV3RKSX.jpg


New model 5” Prostock turbo. Looks like a lot of Holset parts but most of this is custom build.

Foto550-TFQOY8QO.jpg
 
Bit of fun with a Off Road landrover desert warrior 3L BMW Commonrail diesel engine.

Runs with a FIA restrictor on the inlet so it has about 275Hp and 780Nm on 1.3Bar boost or 19 PSI.

[ame="http://www.youtube.com/watch?v=zVA5s2iTbd8&list=UU_jjKaFaf1oxSijxIhaMgIA"]http://www.youtube.com/watch?v=zVA5s2iTbd8&list=UU_jjKaFaf1oxSijxIhaMgIA[/ame]
 
Ready for pulling this weekend.

New dashboard
Grotefoto-CMEQI4CJ.jpg

Foto550-RF48TOFZ.jpg


Exhaust pressure sensor.
Foto550-6IBXOU6C.jpg


Screenshot of the laptop with some of the engine parameters.
Foto550-RF4UTY6W.jpg


License plate sticker. We nearly lost the lice plate twice last year and that could mean disqalifacation.
Foto550-OYVFH8AI.jpg

Foto550-Z4IC8BZM.jpg
 
@ SmokingCAT. No we are not going to one big turbo and for me it’s not hard to explain why.

This is one for the calculator and data coming from a simulator.

We use 2x BorgWarner 179182 that dos 0,69Kg/sec surge line to max 0,938Kg/sec.

A 5” prostock turbo dos about 1,31Kg/sec surge line to max 1,69Kg/sec

2x the 179182 is making 1,38Kg/sec to 1,88Kg/sec operating range so compared to the 5” turbo we use loses 0,08Kg/sec on the surge line but gain 0,186Kg/sec more air mass so we have a wider RPM range with 2 turbochargers according to the calculations.

As on turbine side we have a lot more options than with one single turbo so we can make smaller steps.

As for cost a 5”prostock turbo cost about 6000Euro ex VAT as one 179182 BorgWarner turbo cost about 1600Euro ex VAT.

So I’m not convinced that one big one dos it for us but good thing is we get a truck in the competition with an identical engine running a conventional fuel injection pump and one turbo and the stock exhaust manifold so we wait what this dos on the track.

Have fun.:stab:
 
Where are you pulling this weekend?

I see you are going to Loosbroek. I have friends from here that are in the Netherlands this week and heading to a tractorpull. Wonder if it is the same pull you are going to.
 
Last edited:
@ jedeka, yes we are going to Loosbroek.

Today I visited the Ahoy Superpull and made a small compilation about it.

I met Herlevi in person and also had a great conversation with one of the team members.
Seems they use the bigger Nokian tyre now on the Volvo truck and did not get the balance they needed ending up breaking the gearbox.
I think Herlevi still got some homework to get his truck on the same performance level as the pulling trucks we run and finding the balance and avoiding that the truck start bouncing can be a hard job and most teams ending up going back to there old set-up that worked well for them after breaking loads of parts in the drive train.

I consider our team very lucky that our truck dos hardly bounce on the track but I also know it can change if we go back 1000Kg in weight when we are going to run the NTTO events were the max weight is set to 8500Kg and we now run a cinfig of 9800Kg when we run VNT events.

[ame="http://www.youtube.com/watch?v=-02wOLnwfnI&list=UU_jjKaFaf1oxSijxIhaMgIA"]http://www.youtube.com/watch?v=-02wOLnwfnI&list=UU_jjKaFaf1oxSijxIhaMgIA[/ame]
 
You must log in or register to reply here.
Back
Top