How would the 818 perform?

[atp]

Then 818 is badass concept with 1800lbs with subaru boxer engine that can produce major amount of horsepower out of a small engine. I think it can beat a porsche cayman r, lotus exige, audi tts and any on the street. The handling is going to like driving a huge go kart being able carve through the country side during the summer. Where i live alot people around my age have Subaru wrxs, Mitsubishi eclipse, dodge srt 4 and other major horsepower cars. with the 818 i could beat anyone at anytime.

[Dave Smith]

The 818R we have is undergoing performance and durability testing right now. The engine was simply tuned and ran 255 hp at the rear wheels.

[metalmaker12]

DAVE!!!!!!!!!! lol

I am waiting to see this thing tear it up on video, I am coming to moochfest, hopefully there will be some info there too.

[Hayai]

Yeah, I'm freaking excited for the videos so we can see what she really does!! I hope everyone has fun at Moochfest.

[atp]

Can it do a burn out

[thestigwins]

Dave... videos and pictures or it didn't happen :cool:

[Mechie3]

Bigfoot sighting!

[spaceywilly]

With 255rwhp and 1800lbs it should do 0-60 in about 3.2 seconds or so. I would say it will be below 4 seconds for sure.

[Mechie3]

255rwhp isn't that much for what they have. My stock turbo 06 WRX made 243 AWHP. They could have turned up the boost a little. ;)

[BrandonDrums]

255rwhp isn't that much for what they have. My stock turbo 06 WRX made 243 AWHP. They could have turned up the boost a little. ;)

Mo' boost, mo' problems. I bet you for many folks, a modest tune will feel better in the 818 than going balls to the wall. In a car that light with RWD you want to be able to drive the car, not have the car drive you backwards into the woods.

[Mechie3]

That's only part of it. The big thing was the (lack of emphasis on) Awhp not Rwhp. Assume AWD loss is 22% and RWD loss is 15%.

(243 * 100)/78=311.5 BHP

311 BHP * .85 = 264 rwhp

I didn't all out on my tune, kept it somewhat conservative as it was a DD.

[Evan78]

Of all the posts out there, Dave responds to this one?

[Silvertop]

of all the posts out there, dave responds to this one?

lol;)

[Desertrunner]

I am concerned how the rear suspenion arms will be set up. If they are in anyway simlar to whats on the Subaru cars then the 818 will over steer. The rear suspenion on Subaru are design to help with the over steer when in a corner as the car leans. Drop that same design into a mid engine car and you have issues with the car over steering.
Going to be a fine balance getting it sorted.
Tony

[Evan78]

Tony - the suspension setup is different on the 818.

I'm curious though, why do you say that the same setup would cause oversteer in a midengine chassis?

[shinn497]

The weight is more rearward biased. During a turn, the rear has more momentum and is more likely to slip. In addition, MR cars have smaller polar moments of inertia. Then again the 818 is supposed to be a 40/60 weight distribution so i don't know if that would be true (rememer the roadster is 50/50).

I think FFR will be able to sort out the handling. The GTM has dialed in understeer (Said dave when he was demoing it in a video). Then again, the handling characterstics are ultimately dependent on the builder. It would be nice if FFR would provide a guide and recommend certain settings. The Koni shocks are part of the kit.

[Evan78]

Are you talking to me shinn? I'm not asking any general questions, I was just asking Tony to explain his reasoning.

[Desertrunner]

Hi Evan,
The trailing arms, the one coming from the front of the body to the upright slopes down slightly so it is lower at the upright then it is at body of the car. during cornering the difference between the angle of the two side effectively changes the centre line of the back axle, sort of like steeriable rear axle. By changing these angles you can play with the understeer and over steer.

Ever wonder why Porsche back end is so complex, they control the oversteer by using the design of the back suspenion,

The GTM while very good has an issue with using the back parts off a corvette as in the steeriable upright. Talking to some guys that race them they need to be able to move the steering arm down to the same plane as the bottom ball joint then the back axle won't do funny things in high speed corners. One team are trying pretty hard to get around this issue but so far no luck.

Tony

[Evan78]

I see, you're referring to rear toe control.

[Desertrunner]

I see, you're referring to rear toe control.

I didn't know that is what its call but yes. Its a poorly understood important part of the suspenion of a car. When the final design of the rear suspenion on the 818 is finished it will be good to see how it looks.

Tony

[Flamshackle]

Of all the posts out there, Dave responds to this one?

This^^^

The ffr forum is so hit and miss...

[bnr32jason]

Mo' boost, mo' problems. I bet you for many folks, a modest tune will feel better in the 818 than going balls to the wall. In a car that light with RWD you want to be able to drive the car, not have the car drive you backwards into the woods.

This +1000.

I think people are underestimating just how fast this car will be even on a stock 2002ish WRX setup. Building it for big power numbers is great for impressing your friends and straight line speed, but lets not forget where this car should really shine, in the corners. I'd much rather have mine at a power level that I will feel confident pushing it a little instead of having to baby the throttle everywhere.

[Xusia]

You think as I do! :)

One of the convertibles I owned was a '73 MGB. NOT fast by any standard, but it handled so well (modified suspension, btw) I literally never had to slow down. So despite being "slow," it was a total blast to drive!

That car also taught me to love manual steering and un-assisted hydraulic brakes. :)

[Darkpiggy's dad]

Here's to your 73 MG Xusia!

MGs are fun. I bought a 62 midget in 1973 and though very slow, maybe 78 top on the highway, it was pure fun to drive on curvy roads. I loved that car; oil on water black with wire wheels. Back then, bias ply tires let go gradually unlike modern tires and sliding was the name of the game. All my life I have owned Alfa Romeos. Except for a 59 2000 that was stock, all others have been frame and suspension modded, as well as drive train mods. Not one of them has been viciously fast, but in corners all those 2200 lb or less cars have shone. The problem with older sports cars, at least for me, is wheel lift in corners, but it's also part of the fun. Bias ply tires mainly kept wheel lift from popping up, but grippy radials changed that. All of these cars have had pretty much stock brakes as my method for driving a sub 190 hp light car quickly, is to stay off the brake peddle and on the go peddle. Preserve momentum!

The 818 is going to be a new experience; I will have to learn to drive all over again!