Thanks Andy, I did look up Super Taikyu TC I4 cars and it appears they are ~350hp and run races of only 250-315 miles, whereas in a typical 12 and 24 hour race, ~1100 to ~2300 miles are covered which is considerably more. What makes it difficult to analyze is that most information on it is written in Japanese and I can't find the rules and regulations to look up, for example, minimum engine replacement or rebuild interval allowed.

Like I said before, I already know a largely stock ~330hp Evo will go 12 hours since I have seen it. I am hoping to find higher power specimens that have gone 12 or 24 hours. Since I have a rough idea what one should be able to do, I am looking for real life examples that exceed expectations.

Keep the info coming folks. I'm sure we can learn from it.

 

I know its not the exact same but what about one lap........

Scorke

 

One Lap isn't really in the same ballpark, since they're only making a handful of laps each day, and on street tires.....a lot different from going 10/10 for hours on end.



nlzsndlsadsldxnc

 

i would think you needed to add coolers to the tranny and any other fluids.

 

Well, I drove my Evo from South Florida to New York City for 21 hours straight at about an average of 90 mph only stopping for gas and food, and then did the same thing from NY to FL a week later, that was 6 months ago and the car still runs great

 

Yes, One Lap is undoubtedly tough but from an engine standpoint it is more like a few short sprint races broken up by lots of road miles. Road miles at all but the highest speeds are unstressed miles.

 

Sean what type of event are you planning for? Maybe that will help. I don't think that there are too many series from which we can draw even correlations since most of the endurance cars are larger displacement 6 cylinder versions. Looking at Porsche, and I used to work for an endurance race team with a turbo porker, they use dry sumps, large capacity lubrication and cooling. I think that heat and engine speed are enemy 1 and 2.

Alex

 

Alex, I have a conservative and rough idea of what an unrestricted ~2.3L stroker should produce reliably for 12 hours. I am hoping to find real life examples that exceed my expectations since their existence will urge me to go beyond my own conservative calculations and the data points I have collected from most all endurance 4G63 examples found (which make conservative power as well). In other words, I am looking for exceptions, hoping to find many.. perhaps an entirely different set.

When I say 4G63 I mean the factory block and heads, upper level (but not pinnacle) aftermarket components, built right. It seems some think I intend to run stockish peripherals. I do not. There will be no expense spared in proper lubrication and cooling. I am aware of their importance and familiar with application.

I agree on enemy 1 and 2

 

TheGVR4kid do you have any links for this engine???? its looks amazing and just wondered what they are doing about gearbox selection and stuff. it is mounted north south right????

thanks CHris.

 

The problem with non-open-disclosure non-privateer efforts is that outsourcing is likely done especially with high dollar racing efforts like LMP, and especially when development is based in the UK (as it is with mentioned HKS engine)

It is easy enough to have it almost entirely re-engineered with the ability to bolt on exterior and peripheral pieces that serve as advertisement for the sponsoring company. Until details are explicitly available, I would assume this is what happened.

Not that HKS doesn't do great things but the UK race industry is just extremely advanced in terms of anything to do with road racing.

The dry sump system on the engine looks like IRL type individual centrifugal scavenge pumps that separate what little air there is in the oil.