Uncle Duncan Wins A Race!

[Risking]

acumulators are not aloud in the combinded touring series but we are negotiating with the rule enforcers at the moment about possible oiling system improvements that need to be addressed.

At the end of the day if we can improve the system and it means Duncan is at every round then they should be all for it. More cars racing in their category the better.

The current rules are a bit of a joke when these are meant to be "race cars".

Our engine sealer has told me two other holdens from last weekend have also now been diagnosed with engine issues after the hour enduro. One finished one didn't. His going to be a busy boy sealing up fresh engines for next round!

[Beer Baron]

well done mate. sorry to hear you d-manned it again though. d'oh!

[DRIFTER]

i've only had one engine failure in 2 years and that was tune related. i run a wet sump.

[N1GTR]

Without 4wd you dont generate enough G's to move the oil in the sump

Hahahahaha

Seriously though good point, you've also got a high flowing oil pump. How big is the sump?

Duncan are you at least allowed to have a head return to sump?

[Duncan]

no the rules are pretty simple. all motor standard except sump is free. Brad is working on some piece of art new sump to make the most of that. No oil returns. No enlarged oil galleries etc etc its all standard spec

hey there might be challenges keeping rbs together.....but the car still goes fine when it's running. I figure the best bet is a spare motor so I just picked up one today (thanks for posting it down Russ )

One thing to remember though comparing this car to most.....it runs a minimum of 20min straight at full throttle 95% of the time, 5000 to 8000rpm. Or in the case of the enduro same for an hour. This puts a real strain on water temps, oil temps, oil itself. Not to mention at least 3 full standing starts per round to smash everything around as well.

Its much harder on the motor than 3 lap sprints or even 20 min track sessions - I don't have the option for a mid race cool down lap if things start heating up so this has to be OK to go 100% for all its time.

[Duncan]

oh btw the oil pump outer gears were cracked so it was more like an oil dribbler than an oil pump.

nissan n1 pump

[Risking]

One thing to remember though comparing this car to most.....it runs a minimum of 20min straight at full throttle 95% of the time, 5000 to 8000rpm. Or in the case of the enduro same for an hour. This puts a real strain on water temps, oil temps, oil itself. Not to mention at least 3 full standing starts per round to smash everything around as well.

Its much harder on the motor than 3 lap sprints or even 20 min track sessions - I don't have the option for a mid race cool down lap if things start heating up so this has to be OK to go 100% for all its time.

Thats something alot of people dont seem to realise. Considering its a stockish engine it makes it even harder to keep everything under control.

We'll build something thats just fits the guidlines and make sure every prevention we possible can use is used.

The new sump is pretty awesome with a swinging pick up and multi level baffles.

You know now we have a spare engine coming your never going to need it!

[N1GTR]

no the rules are pretty simple. all motor standard except sump is free. Brad is working on some piece of art new sump to make the most of that. No oil returns. No enlarged oil galleries etc etc its all standard spec

hey there might be challenges keeping rbs together.....but the car still goes fine when it's running. I figure the best bet is a spare motor so I just picked up one today (thanks for posting it down Russ )

One thing to remember though comparing this car to most.....it runs a minimum of 20min straight at full throttle 95% of the time, 5000 to 8000rpm. Or in the case of the enduro same for an hour. This puts a real strain on water temps, oil temps, oil itself. Not to mention at least 3 full standing starts per round to smash everything around as well.

Its much harder on the motor than 3 lap sprints or even 20 min track sessions - I don't have the option for a mid race cool down lap if things start heating up so this has to be OK to go 100% for all its time.

Reimax gears in N1 case?

Same sump i have with some more baffles (is brad can manage to fit anymore in there)?

[Merli]

<coff.coff.http://www.skylinesaustralia.com/forums/Eo...N1-t266003.html.coff>

[Risking]

Reimax gears in N1 case?

Same sump i have with some more baffles (is brad can manage to fit anymore in there)?

No not using Reimax gears. Found something we consider better.

Totally different sump design to yours Steve. This one has a pick up that is free to move around the bottom of the sump with the oil. Its got a revised baffle set-up as well which is simlar to yours,

[BOZ22N]

Has anyone trying machining a spline on the crank and getting a billet gear made with a internal spline? That would be much stronger than the square drive at the moment and with no sudden change in direction like the inside of the gear now there will be only very minimal stress raisers.

We get tricky stuff like that made up regularly at work might be worth a try if anyone wants to donate a damaged crank to trial on????

[Risking]

The toyota engines use something similar. There is nothing wrong with using a flat drive its worked fine for years. The problem is the pumps themselves

[BOZ22N]

What is reason why they crack then?

I am not being a smart arse just curious.

[Beer Baron]

what oil are you using dundan?

[Duncan]

well thats the million $$$ question really Ryan.

Once you start pulling apart borken motors it's all guesswork. sure some guesses are more educated than others and there is some evidence to look at but there is a lot of assumptions as well. especially on the internet.....

[Duncan]

I'm using anything. motul 4100, elf whatever in this motor since it was run in, and penzoil 20/50 to run it in. Lots of theories about which oil to run too. Either way I change it every weekend.

[JAS-25T]

Only cause it's got broken bits of steel in it

[BOZ22N]

well thats the million $$$ question really Ryan.

Once you start pulling apart borken motors it's all guesswork. sure some guesses are more educated than others and there is some evidence to look at but there is a lot of assumptions as well. especially on the internet.....

Well i look at it this way, oil pumps have been failing so until engines stop popping or they pop with intact pumps why not make them bigger and stronger then see if it breaks? Then get into cavitation, vibrations and oil flow issues then? I am no genius but wouldn’t you just try and stop the bits that are breaking breaking. hhhhmmm.

Are the drive gears the main part that have been failing?

Or maybe the crank is heating up and expanding at a different rate to the gear so the clearance is too tight at temp between the gear and the crank so the crank splits the gear??

Too much night shift must sleep. zzzzzzzzzzzzz

[JAS-25T]

As you increase the strength of one part, you make another part the new "weakest link"

to try and stay within a reasonable budget, you can't keep chasing the weakest link untill they are all above your power/requirments, sometimes....

[PRO_32]

As you increase the strength of one part, you make another part the new "weakest link"

to try and stay within a reasonable budget, you can't keep chasing the weakest link untill they are all above your power/requirments, sometimes....

isnt that mptorsport in a nutshell?

"how fast can you afford to go"?

I understand what your getting at though, the law of diminishing returns does apply, guess it's all relative to your budget though.