We teardown the IndyCar Engine to expose its Secrets! Cosworth XD Turbo Methanol V8

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Track: Far Far Away — Ferco [Audio Library Release]
Music provided by Audio Library Plus
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Creative Commons — Attribution-ShareAlike 3.0 Unported — CC BY-SA 3.0
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[ethanreich]

MechE/SAE Project team student here rob, the combination of these crazy projects, off the cuff engineering and shop banter make some of the most entertaining content ever man, keep it up!

[ProModsPerformance]

Two things to consider.

1) these engines are never cranked "cold". Only with hot oil and water. So it won't spin very well cold as the clearances are intentionally that tight.
2) Careful with the concept of using exhaust cams as intakes. While the lift target may be right, the timing and duration of the lobes from cam to cam may not be correct/ideal. Machining the intake cam ensures the correct behavior, just with less lift.

[James-tuyo]

I was track support during the XD Era, which was the heyday for champcar. The 4 PCI injectors were giving up to 45 % of fuel at max. The turbo inlet was the IGV which was broken into 4 pie shaped pieces driven by mechanical gearing on the outer perimeter, which, when the throttle closed the turbo, was in a vacuum keeping it from slowing. The nineth butterfly was reduction gear driven for control of the boost. It was constantly whipping in modulation. If you look at the shifter linkage at the handle, there should be a sensor there which, when shifting, that switch closed the nineth butterfly and backed ignition to take tension from the Trans to make the shift. Could go on forever but, great to see you diving in.

[OlSlickDaddy]

At 55:00.
The timing chains popping lose is because the timing chain tensioners are a hydraulic tensioner and because there is no oil pressure, there is no tension on the chains. So, the valve spring pressure is make the cams move more then it normally should. Hope this helps!

[UltimateUltimaRS]

You guys are the furthest thing from half assed YouTubers. Even with a million subs, your channel is so underrated. The passion that goes into it is so inspiring man.

[NovaRedHead]

I clicked, expecting 20 minutes with short clips of teardown. I did not expect an hour and 6 minutes of a well-edited, in depth, and still comedic teardown. As always, hats off to you Rob. You've got good people around you, keep at it brother, Merry Christmas.

[zeala]

Rob, your stuff has to be one of my favorite youtube channels out now, You learn so much and at the same time have a good time. Thank you from us all and merry xmas..

[robpriddy]

Rob, In the time of the 80s and 90s Indy 500 races, the target MPG to have enough fuel to finish was 1.8 mpg. That was 1.38 gallons burned per lap. Qualifying was not an economy event so running all 900hp burned even more. This is an awesome thing your doing here and long overdue for anyone to do this. I can’t wait for dyno day and to see how much fuel per pull it eats.

[rambow]

This is crazy, Indycar engine tear down? Top notch stuff!

[shredder]

Probably one of the first hour long videos I couldn't wait to finish on YouTube. Love all of this, more please!

[HandyDan]

Awesome teardown! This engine is art in motion, So much engineering goes into INDY for the top cup win, OEM piston engines are nothing like this Cosworth.
FYI, To find the correct rotation look at the chains, Chains ALWAYS pull straight, the idler side is always the return.
Happy holidays!

[jawspwnsu]

Okay I've been following Rob's projects for almost 2 years now and this is the video I've been waiting for this whole time. Rob and Isaiah's explanations and showing how/what to do but now on a piston engine. And it's full length (obviously not 100% uncut but not shrunk down to nothing).

Thanks guys! Merry Christmas 🎉💚❤💪🏽

[MrSlawberry]

Hey Rob if you read this, im almost willing to bet that the oil/air separator in the valley of the engine. The reason of the oil going in through center then out the side instead of reverse order is to allow the oil a chance to reform and not be Frothy which will be helpful with the Methanol situation

[TravisFabel]

I have to say this is currently my favorite series on YouTube. My dad worked on these when I was a kid, and this brings back so many memories. Some of the stuff you were doing initially that wasn't wrong but you didn't know how to do it, I'm sitting here watching the screen realizing how much I've learned from just being around this stuff as a kid.
I just love seeing it now as an adult now that I've had a couple decades of actually learning about engines and race cars.

[mo-r-racing]

The only thing that could top this is a 90's F1 engine teardown. Since that's not Gona happen anytime soon....this is the most fascinating engine teardown series on the internet. Amazing to see this in detail and go on the journey with you. What a series. Amazing!

[SteffenHansen]

Question about finding torque settings. When torquing a bolt to specific torque setting, you're overcoming the friction between the male and female threads. As soon as the rotating action is done, when your torque wrench says "Enough", your kinetic friction coefficient turns into a static friction coefficient. When you then apply pressure with your torque wrench again to get the number, it will read higher since you now also have to overcome the bond between the two surfaces (which can be quite a bit of surface - thread and block/bolthead mating surfaces combined). This especially in Robs motors case, when it's been sitting for long time giving the surfaces plenty of time to get really intimate.

Watching a teardown like this is absolutely awesome.

[Yo_Adriann]

Great way to start Christmas morning with an 1 hour Rob Dahm video... haha

[bananabottles]

You guys' excitement is contagious! Despite having endless problems with my project car, I can sit down, have a laugh, and learn something when I watch you guys.

[darcyrosentreter]

This is by far the best "Rob Dahm" video ever. Thanks for sharing.

[mattcangie]

I have so much respect for the insanely talented and knowledgeable engineers at Cosworth. Thanks Rob for sharing this experience with us.