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Major props to him for not using a POS LS motor
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Oct 15, 2017 10:50
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CAT INTERCEPTOR posted:Major props to him for not using a POS LS motor  Please, tell us how the LS is a garbage design compared to the EJs. I need a good loving laugh today.
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Oct 15, 2017 15:05
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   http://barnfinds.com/ran-1977-amc-van-concept/ loving rad.
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Oct 15, 2017 17:19
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You get to a point where you just have to ignore the outrageous poo poo our outspoken angry Aussie says and go about your day.
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Oct 15, 2017 17:56
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That is awesome.
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Oct 15, 2017 18:00
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Hugh G. Rectum posted:toyota MR8? The 2 in MR2 is for two-seater. That's why it didn't ship with a 2-cyl 
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Oct 15, 2017 18:08
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Yeah I think Hugh might have been getting it confused with this one. 
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Oct 16, 2017 02:19
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 1000hp 2jz with no intercooler
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Oct 16, 2017 03:37
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but y tho
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Oct 16, 2017 03:45
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I'm going to guess it's running on meth or E85 and probably values response over power with short run times. e: O, that's Daigo's JZX100. yeah, it's running on methanol. BlackMK4 fucked around with this message at 03:48 on Oct 16, 2017 |
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Oct 16, 2017 03:46
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Yeah I was going to say methanol. Indy cars make that kind of power without intercoolers too.
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Oct 16, 2017 03:50
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BlackMK4 posted:I'm going to guess it's running on meth or E85 and probably values response over power with short run times. yah thats the one
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Oct 16, 2017 03:50
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jamal posted:Yeah I was going to say methanol. Indy cars make that kind of power without intercoolers too. They don't use methanol anymore though.
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Oct 16, 2017 04:10
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how long can you safely run something like that?
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Oct 16, 2017 04:23
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Thief posted:how long can you safely run something like that? Until you cant
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Oct 16, 2017 04:55
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Thief posted:how long can you safely run something like that? If you design it for methanol and tune it for methanol... until you run out of methanol? Champ cars used to often finish, for example, the Indy 500. 
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Oct 16, 2017 14:50
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iospace posted:They don't use methanol anymore though. E85 these days, which is more like methanol and less like pump gas or race gas in terms of charge cooling. They also run surprisingly little boost. The highest is just shy of 10 psi during push to pass. Regular road course is 7.25 psi, short ovals is 5.8, and only 4.35 at superspeedways.
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Oct 16, 2017 15:04
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IOwnCalculus posted:E85 these days, which is more like methanol and less like pump gas or race gas in terms of charge cooling. Wow, way lower than I expected. I should probably look those engines up cause now I'm wondering about what RPM and CR, how much power they make, etc.
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Oct 16, 2017 15:47
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They also run two turbos. I'm sure if it was one the boost would definitely be higher.
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Oct 16, 2017 16:13
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Even in the Champ Car years, it was pretty low. 40 inches of mercury absolute in 1998, which works out to 5psi over atmospheric pressure. In the last few years before CART went to the Cosworth XF-E and then disappeared, boost was down even further. ... also why would boost be higher with a single turbo?
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Oct 16, 2017 16:25
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mekilljoydammit posted:Even in the Champ Car years, it was pretty low. 40 inches of mercury absolute in 1998, which works out to 5psi over atmospheric pressure. In the last few years before CART went to the Cosworth XF-E and then disappeared, boost was down even further. I was mostly figuring "Oh, have to deliver to 6 cylinders instead of 3", that's all.
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Oct 16, 2017 16:34
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Now wondering what CFM they actually push since pressure isn't really a great gauge for airflow.
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Oct 16, 2017 16:38
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CART later years I think was in the 850-950hp range, then got detuned to 750hp (plus whatever for push to pass) in the last years when it went to a spec engine. You can pretty much plug that into whatever CFM / lb-min airflow calculator you want. For reference the new indy cars were either running a pair of EFR6758 or one EFR9180 turbo (custom housings for racing stuff but otherwise pretty normal) and now the spec is 2x EFR7163s. And yea, pretty far towards the bottom part of the compressor map. The old CART turbos were all pretty custom and you're not going to find a compressor map for anything comparable. http://www.lolachampcar.com/ has some pretty interesting stuff by a guy who was vintage racing.
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Oct 16, 2017 17:01
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Sorta-Merlin (RR Meteor with a traditional blower): https://www.facebook.com/1470465719...TdV2dh4oKIafHvc (Facebook video) Destined for a Duece highboy, if their cover photo is to be believed.
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Oct 16, 2017 18:27
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Friendly reminder they canceled the CART race at Texas because they were pulling too many Gs in the corners. Also, yesterday an old school British cab drove by but I was working so I couldn't get pics  Had flags on the front fenders though!
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Oct 16, 2017 18:27
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Darchangel posted:Sorta-Merlin (RR Meteor with a traditional blower): I'm the complete lack of hearing protection.
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Oct 16, 2017 18:42
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Dannywilson posted:I'm the complete lack of hearing protection. What?
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Oct 16, 2017 18:49
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MrYenko posted:What? WHAT?
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Oct 16, 2017 20:41
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Darchangel posted:WHAT? Something about gearing erections, I think. Well, give 'er some more gas, let's give the people what they want!
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Oct 16, 2017 20:45
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Enourmo posted:Something about gearing erections, I think. Well, give 'er some more gas, let's give the people what they want! STEERING CORRECTIONS? IT'S NOT EVEN IN A CAR!
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Oct 16, 2017 21:08
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Darchangel posted:STEERING CORRECTIONS? IT'S NOT EVEN IN A CAR! I GET IT, BUD, I FEAR ELECTIONS TOO, BUT WE'RE SUPPOSED TO BE TALKING ABOUT CARS.
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Oct 16, 2017 22:41
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http://desert-autosport.ebizautos.com/plugin-detail.aspx?iid=10508157&isfullwebsite=true
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Oct 17, 2017 02:16
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iospace posted:I was mostly figuring "Oh, have to deliver to 6 cylinders instead of 3", that's all. Honda used a single turbo for the beginning of the DW12 era, while Chevy went with two. Boost levels were the same but Honda had a much larger turbocharger. Both use twins now.
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Oct 17, 2017 02:25
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Larrymer posted:Now wondering what CFM they actually push since pressure isn't really a great gauge for airflow. Well assuming there's no air leaks, you can calculate it from RPM + displacement + boost. A 2L engine running 10 lbs of boost over atmospheric pressure (14.7psi) at 20 celsius delivers 1L (two cylinders' worth) of air per revolution. The ideal gas law PV = nRT P = 1.68 atm V = 1L R = 0.082 T = 293 K n = ? says that that's 0.069 mol of gas. If the engine is spinning 5000 RPM, that's 345 mol of air sucked in per minute. At SATP, 345 mol = 8298L...so the intake face of the turbocharger is sucking in 293 cubic feet of air per minute.
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Oct 17, 2017 02:56
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Few things assumed here. The engine you describe will not draw a liter. It will always be less as defined by volumetric efficiency which is controlled by a multitude of various head loss sources including the throttle itself. The temperature will vary, depending on the latent heat of vaporization of methanol and adiabatic heating across the turbo. It's been a while since thermo class, but I think that will throw off numbers a non-negligible amount.
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Oct 17, 2017 03:07
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Ok well get back to me when you've worked those numbers out.
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Oct 17, 2017 03:12
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angryhampster posted:drat I would love to do this with my ST. I would love to do this with my R34!
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Oct 17, 2017 03:23
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VE can get above 95% at peak torque. But the thing is that the mass flow rate depends on both the boost pressure and compressor efficiency. If you have, say, one big turbo at 15psi and 75% efficiency, and then two smaller turbos doing the same thing, in theory that should be the same amount of air and the same outlet temperature.
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Oct 17, 2017 03:35
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All it's missing is the Brazzer's logo. https://i.imgur.com/S6SYSVZ.mp4
Wistful of Dollars fucked around with this message at 13:31 on Oct 17, 2017 |
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Oct 17, 2017 13:11
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Holy poo poo pisssssss
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Oct 17, 2017 14:05
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