1/4 mile drag racing

[nialloftara]

Sadly no my pushrod tech could only tie your previous score. It just was not responsive enough to get the last few hundredths I needed.

[Luilakkie]

The new (legal) king of the A Class

[strop]

Oh no that's on an entirely different level now! Back to the drawing board!

EDIT: right, went back and squeezed out more from the engine. It had quite a bit of room to move to be honest, but I didn't even know that this version was capable of putting out quarter miles like this. There were plenty of other changes, which I'm happy to share if anybody's interested in a mutual exchange of info

[nialloftara]

What kind of power levels are you guys at? I've hit my max in the 2350-60hp range, have you gotten more out of the engines?

[strop]

Yeah I was using 2330hp-ish before, but that engine was a fairly "conservative" (lol) tune for 98RON (what) and I forgot to take off the 3 way cat converter and muffler (you know, all that unnecessary weight). Pushing out as much as I could to get a reliability of 0.1 for my ventilation, I get a nice round 2400hp (though I got the same time when I was running anything between 2390-2400 anyway).

I notice my car excels in the second half, but takes a few hundredths more to get off the mark. This is after I furiously balanced my downforce so my fat drag tyres wouldn't blow their seams. Since your approach is similar to mine nialloftara, if you did the same (just check my stats), you'd probably find that extra time. However I notice luilakkie's car has a very different setup and somehow manages to get off the mark that much faster. Is it running AWD?

EDIT: Oops, forgot that I changed suspensions too, and this freed up quite a bit of engine bay space. Screw 2400, somebody just got himself a whoooole lotta more horses to play with!

Okay here's the new benchmark. I'm running 2613hp which is as much as I can fit into the engine bay, I think. POWAAAAAAHHHHHHHH!!!

SleipnirDrag.png (871 KiB) Viewed 5649 times

[nialloftara]

Whell sh*t id forgotten about switching the suspension I'll have to try that tonight. You running funny car style front tires btw maybe my pushrod has a chance of dropping that tenth of a second still

[strop]

Oh absolutely I'm running funny car style tyres, hell, in fact this thing is practically a funny car! I played around with the rear wheel diameters, the profile is close to 60 or something, but the front width is about 255... at least as low as I can get it without blowing and becoming the next biggest accident on the drag strip! For those of you wondering why my gearing is going all over the shop, that's also me trying to get the gearing to accommodate the increases in power without lighting the rears up.

[nialloftara]

Oh, I've got 125-135 fronts... maybe I should look into that.

[strop]

I wish I could use 125-135, but given the way I chose to tune it, that simply isn't going to happen anymore!

[07CobaltGirl]

OK, maybe a totally stupid question, but....

How exactly do you know you're "blowing tires"????????????

[nialloftara]

When you press the start button and it tells you So, I've gotten both my pushrod and my 40 valve versions down to 7.76 seconds, I realized why my cars were so heavy... -15 steel is lighter then +15 steel but it's reversed for carbon fiber, which when I think about it makes perfect sense. So both cars went on crash diets, and both engines got a slight size tweak, now at 8.6 liters, maybe tomorrow I can close in some more on your new time.

[strop]

Useful thing when you're blowing tyres: check the listed top speed. The closer it is to your theoretical top speed, the closer your settings are to the tyres tolerating the power/traction. This way even if you are "blowing the tyres", you can still tweak in hopes of fixing it.

[07CobaltGirl]

Wow! I guess my engines are not powerful enough to blow tires! hahahahaha

[strop]

Oh I'm sure your engine is powerful enough to blow tires....... just not on the first run!

[07CobaltGirl]

Maybe on the 100,000th run.