After a few nights of work modeling and animating here is a video of the latest engine parts we have got working - An Pushrod (or Overhead Valve) head setup, this simple, robust and cheap configuration will be the mainstay of your early game compact cars, but will struggle to compete with newer more technically advanced designs later on in the game.
This is the internal view of the engine running, you'll also be able to view the completed engine from the outside, and strip away various parts as it runs.
All still at a bit of a work in progress stage, and the garage backdrop is nowhere near complete.
But, could we have a todo list of things needed to release engine designer?[/quote]
That’s a pretty long and complicated list, and we aren’t sure of everything we need to do yet either!
It should be done by January, but honestly, some stuff has taken a lot longer than we thought and some stuff has been quicker, so its hard to predict so it might end up taking a little longer than than
Sorry about the dredge peps, just have a slight concern that I’d want to air.
“but will struggle to compete with newer more technically advanced designs later on in the game.”
Thing is, while a OHV design for sure have several disadventages compared to an OHC engine, it also have a couple of really good advantages, such as a lot more compact packaging, less weight( and lower centre of gravity to booth) easier maintenance and less friction. The fact that for eample GM’s LS-series is still very much competitive even among several more “advanced” designs should serve as proof of that.
A fully trimmed 7.0 litre LS7 OHV V8 (Corvette Z06) weights 458 pounds, a fully trimmed 5.0 litre S85 DOHC V10 (BMW M5 and M6. 10 awards from “International Engine of the Year”) weighs 529 pounds. They produce about the same amount of peak power, but the former have a far more favorable tourque band, less weight, smaller dimensions, is more efficent and less costly. So which one is really the most technically advanced?
The LS engines are a bit of a special case - but you should be able to build a similar engine in game by using very high quality valve gear etc. allowing higher revs and so on.
OHV engines can certinaly be made to make a lot of power, but the only real advantage of them is simplicity, compact size and weight - they can perform very well, but they don’t have a performance advantage over OHC multivalve designs, and you’d need to spend a lot more R&D on the OHV motor to get as much out of it.
Thanks for the answer Daffyflyer. It’s a relief to hear that you’re focusing on making this as realistic as possible, adding lots of variables, instead of just going that one type of engine design, or suspension set-up is initially better than another one in any case. It all depends on what be the purpose they are designed for.
[quote=“Fenris”]
A fully trimmed 7.0 litre LS7 OHV V8 (Corvette Z06) weights 458 pounds, a fully trimmed 5.0 litre S85 DOHC V10 (BMW M5 and M6. 10 awards from “International Engine of the Year”) weighs 529 pounds. They produce about the same amount of peak power, but the former have a far more favorable tourque band, less weight, smaller dimensions, is more efficent and less costly. So which one is really the most technically advanced? [/quote]
yeah and a 7.0 litre BMW v10 would blow it away
LS7 also has to be hand built and has a dry sump system much more work and expense than the bmw lump.
also the 6.0 v10 fitted to the new 7 series has 80lb-ft of torque more than the ls7 and is still 1000cc smaller
And it would be the same size and weight as a small house.
You can buy an LS7 from the dealer for about $14k US. I can’t even find pricing for a complete S85 crate engine on the entire internet, which most likely means if you went to the BMW dealer the parts counter guy would laugh in your face. I work parts for a Mercedes Benz dealer and MSRP for some AMG engines is over $50k US.
Considering it’s twin turbocharged that’s not impressive in the slightest.
The 7 series BMW currently doesnt ship with a V10 twin turbo. It ships with a 6.0 V12 twin turbo taht produces something like 400kw
If your arguing over which is more high tech id honestly say the BMW S85 by a clear margin. How americans get so little power out of such a big engine is commendable really
The torque means you need a larger, heavier clutch and larger, heavier gearbox and shafts than the BMW though. It’s also much worse on fuel at low throttle openings, so you need a bigger tank too. If you’re using the V10 in something different the amount of weight you can loose in the flywheel and clutch alone is astonishing.
Looked at the LS7 when building the other rally car and ended up going with the BMW engine in the end for that reason - you end up with the LS7 actually being a slightly heavier package overall, especially as the BMW engine is much stiffer torsionally (can use it as a stressed member in the frame), and the powerbands are pretty much the same (yeah, I was surprised at that too!).
There’s not much in it between them really when you look at full drivetrain package.
The LS7 lets you get the engine under lower bonnet heights though, which can be an aerodynamic advantage, and is probably more suited to cruising around at low rpms for those that have forgotten about the gearstick.
