Mike 1017 Posted January 24 Posted January 24 Which car would win in 1/4 mile Drag Race a Bugatti Chiron or this Frankenstein Chevelle? 1
johnyrotten Posted January 25 Posted January 25 Odd set up. Looks like a old radial tire set up with the front suspension, maybe. The rear mount turbo's probably help hitting the tire so hard on the leave,lots of lag, but it's my understanding a radial needs you to"smash" the tire. Weird setup. 1
Ace-Garageguy Posted January 25 Posted January 25 1 hour ago, johnyrotten said: Odd set up. Looks like a old radial tire set up with the front suspension, maybe. The rear mount turbo's probably help hitting the tire so hard on the leave,lots of lag, but it's my understanding a radial needs you to"smash" the tire. Weird setup. Massive heat and energy loss going back to the turbos through those ridiculous flex-pipes too. The single-strut wing mount doesn't inspire confidence in the overall engineering either, but what do I know? 1
johnyrotten Posted January 25 Posted January 25 2 minutes ago, Ace-Garageguy said: Massive heat and energy loss going back to the turbos through those ridiculous flex-pipes too. The single-strut wing mount doesn't inspire confidence in the overall engineering either, but what do I know? I completely overlooked that. Makes no sense.
slusher Posted January 25 Posted January 25 Man, that’s a lot of motor for that Chevelle but I’d watch it run the quarter mile..
stitchdup Posted January 25 Posted January 25 9 hours ago, Ace-Garageguy said: Massive heat and energy loss going back to the turbos through those ridiculous flex-pipes too. The single-strut wing mount doesn't inspire confidence in the overall engineering either, but what do I know? i think that just really dirty exhaust wrap to protect the glass, which leads me to believe its rarely run as the glass is just too clean.
Ace-Garageguy Posted January 25 Posted January 25 (edited) 2 hours ago, stitchdup said: i think that just really dirty exhaust wrap to protect the glass... You are correct. It is indeed exhaust wrap. My duh. https://www.dragzine.com/features/car-features/this-no-prep-chevelle-has-a-wild-turbo-setup/ But I'm still looking for the other two turbos... EDIT: The heat and energy lost through the long pipes TO the turbos has to be pretty huge, and there's a thing called "pumping losses" that affects the charge air coming FROM the turbos back to the front of the car as well, and those have to be pretty high too. There are reasons that turbos are usually positioned as close to an engine's exhaust ports as possible. But MAYBE the losses aren't great enough to significantly affect the power this rig produces. Somehow. (I'm much more familiar with turboed road-racers and street installations; I know a lot of drag turbo setups look nothing like road-race setups, and are asked to provide boost differently, like bringing the revs up while on the trans brake, allowing the turbos to spool up...and which is why drag cars can run such huge turbos that couldn't possibly work in road-racing applications.) HOWEVER...one of the reasons the old Potvin-style front drive mechanical blower setups fell out of favor was because of the pumping losses in those blower-output pipes. And they're not very long. Then there's the old adage among aircraft and race-car builders "if it looks right, it is right", which is not always true, but IS true enough of the time that most successful high performance cars and aircraft are clean-lined and beautiful too. And if anybody spots the other two turbos referred to in the title of this thread, let me know. Edited January 25 by Ace-Garageguy 1
stavanzer Posted January 25 Posted January 25 1 hour ago, Ace-Garageguy said: And if anybody spots the other two turbos referred to in the title of this thread, let me know. The Dark Blue thing, behind the radiator, directly under the Bright Red bracket?
Ace-Garageguy Posted January 25 Posted January 25 21 minutes ago, stavanzer said: The Dark Blue thing, behind the radiator, directly under the Bright Red bracket? If we're looking at the same things... ...the "bright red bracket" is the water pump, and the "dark blue thing" under it is the lower coolant hose. Turbos have to be fed hot exhaust gasses, and as all 8 header primaries appear to merge into collectors that dump into the over-roof pipes, I can't understand where two more turbos could possibly be.
johnyrotten Posted January 25 Posted January 25 I don't think it's quad turbo, most compound set-ups are coupled directly or almost directly. Remote mounting eliminates the need for an intercooler at the cost of boost pressure. Some diesel drag trucks use a compound set up, they push insane amounts of boost. 90-100 pounds plus. They use a "smaller" turbo to spool the larger one, and "stretch out" power band (lower rpm as they larger turbo's have no chanceof spooling off idle).Some racers use nitrous while staging the car in higher altitudes to do the same. Once the turbo is spooled up, nitrous is off. 1
Ace-Garageguy Posted January 25 Posted January 25 27 minutes ago, johnyrotten said: I don't think it's quad turbo, most compound set-ups are coupled directly or almost directly... Yeah, I'm only seeing two big turbos and two wastegates in this view...
TarheelRick Posted January 26 Posted January 26 Ace, I wonder why you are questioning this. You know the accuracy of internet writers especially when it comes to cars. I see four squiggly things in the exhaust system, two are sort of shiny and the other two are sort of rusty looking, so there must be four turbos. Problem solved. 1 4
John M. Posted January 26 Posted January 26 If my school bus had the same set up, I'd get the kids home lickety split especially on Friday afternoons.
NYLIBUD Posted January 26 Posted January 26 😵💫.Looks like the boys from Roadkill Garage set it up. 2
johnyrotten Posted January 28 Posted January 28 On 1/26/2025 at 4:26 PM, NYLIBUD said: 😵💫.Looks like the boys from Roadkill Garage set it up. With the last of the motor trend money. 1 1
Mike 1017 Posted January 29 Author Posted January 29 I have looked for Drag Racing videos of this car. I have found only static pictures. The car may be just a conversation Garage Queen 1
MeatMan Posted February 1 Posted February 1 Yes, rear turbos are not optimal but can make big power done right. Check out this Camaro. I love it most because it reminds me of one I had. Same color and all!
johnyrotten Posted February 1 Posted February 1 That car pulls real hard past half track. Wakes up around the 330', all business after that.
Ace-Garageguy Posted February 1 Posted February 1 (edited) Rear-mounted or remote turbos are nothing new, and there's no reason a well engineered installation intelligently developed for its intended application can't work just fine. The WW II P-38 Lightning and the P-47 Thunderbolt both used turbos mounted well away from their engines. P-47, above Edited February 1 by Ace-Garageguy CLARITY and ACCURACY
johnyrotten Posted February 1 Posted February 1 (edited) 3 hours ago, Ace-Garageguy said: Rear-mounted turbos are nothing new, and there's no reason a well engineered installation intelligently developed for its intended application can't work just fine. The WW II P-38 Lightning and the P-47 Thunderbolt both used turbos well behind their engines. P-47, above That's not "a" turbo. That's "THE" turbo. Massive. Of course both of those aircraft mean business. Edited February 1 by johnyrotten Spelling 1
MeatMan Posted February 2 Posted February 2 21 hours ago, Ace-Garageguy said: A little science (this guy's pretty good): Excellent vid! I learned a lot about turbos in general, and RM turbos in particular. Thanks for posting.
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now