How hard-line is your 5000cc rule? Is it like reliability where 49.9 is close enough? I’m using CIs and I have a few variants that I’m deciding on, all coming in at 305 CI. Would you prefer that I switch over to Metric and make sure I’m on or under the 5000cc mark?
I thought 302 was the limit for the 5.0 trans am series back in the 60’s with the boss and z28.
I never use inches for just that reason, but I have two suggestions if you’re stuck on US customary units:
[ul]]Build the engine right at the cusp - i.e. so that one point less bore or one point less stroke would put it at 304 CI or less./:m]
]Check the .lua file on your hard drive after you’re done. There should be a line that says “Capacity=”. If that number is less than 5.000 you should be fine./:m][/ul]
Someone has exceeded 760 hp?
Wait - I’m rereading the rules, and it looks like the family capacity has to be over 5000cc and the variant capacity has to be under 5000cc. Is that correct?
I understand that the family engine can be bigger than 5000 cc but the variant must be 5000 or lower.
[quote=“OskarLGS”]
capacity has to be over 5000cc and the variant capacity has to be under 5000cc. Is that correct?
I understand that the family engine can be bigger than 5000 cc but the variant must be 5000 or lower.[/quote]
Like making the engine on the Chevy 400 smallblock,[size=85]the casting is made for bigger bore than the 302[/size], then put in a short stroke crank to get it down to under 5000cc.
I think it was actually 305. GM did build a 302 CI V8, but their 5L was actually bigger than the Ford 5.0 which came in at ~4.95L as a 302. I usually use the rough conversion of 61 CI/L. Therefore 61 CI*5L = 305 CI.
Regardless, I’ll go through and check on the metric scale. I still can’t decide if I should go with my motor that makes more torque and uses race intakes, or my other version that makes one less horsepower and about 15 ft-lb less torque for a reliability in the mid 60s. (I have 2 more variants that I trashed, one because it was a turbo version and prohibited, the other because it was only 4 valve per cylinder and I was having my intake valve airflow restricted in the top end.)
We are limited to 700HP, right? The 680-700 wasn’t a suggested range.
Yes, 680-700 is compulsory.
It was tricky, but in Build 150922 I was able to barely squeeze together a SOHC V6 that satisfied the rules - 681 hp, 20% efficiency. So that’ll be the Packbat Auto Works entry.
It’s way easier to build DOHC, though.
[quote=“OskarLGS”]
capacity has to be over 5000cc and the variant capacity has to be under 5000cc. Is that correct?
I understand that the family engine can be bigger than 5000 cc but the variant must be 5000 or lower.[/quote]
yes that is correct, i did that as in v8 supercars irl there is one engine that is bigger than 5L but has 5L internals =)
sorry for any of the confution about that
No worries! I asked because it seemed like a really clever idea - another way to encourage people to design the engines as close to 5000cc as possible. But that might be because I am silly, and didn’t think it through.
(That said, I’m pretty sure my engine is either at or close to the maximum family bore/stroke ratio anyway.)
I just submitted my engine entry. I had such a hard time deciding what motor to send in. I finally settled on the final prototype I built. Before I followed the naming convention it was Prototype 4 in my game, so I went through a few iterations of the motor before making my decision. I dropped both motors that were on my short list into the same car and sent them for testing on the automation and airfield tracks and they were both within hundredths of a second of each other on the clock. I’m still second guessing myself, but I think y’all will be happy with what Boss Motorsports put together.
Here’s Prototype 3, which was the last competitor to the Boss Motorsports 385 V6, which was my final submission.
I am thinking of submitting an engine that is capable of detecting when it is being scrutinised in an official test and thence putting itself in “cheat” mode that restricts the output to 700 horses and maintains an efficiency of over 20%. In normal conditions it produces 760 HP with a 15% efficiency. I don’t think it’s dishonest per se, just a liberal interpretation of the regulations. In any case, who’s going to know? (laughs maniacly). 
soooo i tried building one.
here it is with it’s potential pulled out (see even then it’s efficiency is still 20%+ 
)
so i pulled back a little to meet the limits of the competition. some castrating is done, the result is this
better efficiency, higher reliability, slightly lower weight, barely any drop in torque
but then i remember, high production Unit will add up to the end total cost of the car. so i tried to make the LPU-Low Production Unit Version
with almost only a third PU of the original version
it’s less efficient, heavier, have quite a bit of torque drop, less reliable.
BUT.
i figured all of those negative could be offset by the money you could put in the body/trim design
BUT there’s also a catch. i still haven’t updated from version v150707.
i tend to skip a couple version just because my internet speed.
updating=redownloading the entire game. and redownloading the entire game means about 5-6 hours of download time, when my the connection isn’t being used for something else. more when it is
im waiting for the open beta to be somewhat more stable(less bugs), before i download.
also, i’m still new. i don’t even know how to export the engines/cars
is it allowed for someone to represent me in this competition? just so the engine i built could be ported to open beta version, and be submitted?
The calculations are often changed between builds, so your engines may not put out the same numbers in the open beta.
How bad is your Internet? Is it still dial-up or something?
The reason I haven’t made anything yet is precisely because I’m waiting for open beta to become public release. Currently it’s wave after wave of bug fixing, and while I’m familiar with the changes in the mechanics, some of the tech year changes may (though a little unlikely) affect performance.
At least this is naturally aspirated, so there won’t be a big change as there is with turbos (so hard to build 2000hp hypercars now ;_
R.I.P Strop 
I’ve made my engine and sent it in, and I can easily change it if need be. The changes with calculations and stuff won’t be that drastic.
The worst part is, Microwave, that I can no longer use witchcraft to have a car go 500km/h yet also make it around Nordschleife in under 7 minutes xD (400km/h and under 7 minutes while being a class leading hypercar, however, is easily done.)
This said, that part of the track simulation needs a bit of work anyway, and I look forward to seeing what Der Bayer’s modelling will bring.