Clever Turbo Surge Solutions
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- čas přidán 27. 07. 2024
- A big turbo and a small engine means lots of turbo lag right? Perhaps not!
Compressor surge is not a new issue in the drag racing world where the large turbo and small engine (small capacity) game was probably created, but for those circuit racing who want the benefits of a big turbo without the downside, generally being turbo lag and poor response, it generally is no worth the trade off.
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At events like the @WorldTimeAttackChallenge we are seeing more and more smaller engines running large turbos however without the negatives by taking advantage of some of the data we can gather from our vehicles when using ECUs like some models@emtronworld6231 and other on point ECU suppliers. What is this key data point and why does it matter? Turbo pressure ratio monitoring, but stop asking questions, watch Andre instead and he'll explain the rest of how this works with a drive by wire throttle body instead of a blow off valve and why that even matters.
Note, we're talking about compressor/turbo surge at wide open throttle here.
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TIME STAMPS:
0:00 - What Is Compressor Surge? (Tschu, chu chu chu)
0:48 - Common Occurrence From Short Shifting In Drag Racing
1:18 - Time Attack Issue Now Too
1:44 - How It Occurs In TA
2:01 - Less Boost
2:09 - Less Boost But More LAG
2:24 - DBW Throttle Body Instead Of BOV
2:51 - Surge Solution: Pressure Ratio Monitoring
3:29 - No Lag, No Surge, Smiles All Round
3:37 - Free Lesson!
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#highperformanceacademy #compressorsurge #turbolag #bigboost #alltheboost #emtron #wtac #dbw #learntotune #enginebuilding101 #dontletthesmokeout #wiring101 #datanerd #gofasterwithdata #racecraft #learndriveoptimise #motorsports - Auta a dopravní prostředky
![Aggressive Anti-Lag Theory | Fresh Air ALS Mountune [TECH NUGGET]](/img/n.gif)
Very cool use of emap and using dbw throttle as an active big. There goes 2 more analogue inputs..
Also using a close loop fueling table and a boost bypass to vent the blown off air directly into the exhaust to create a post burn chamber in the exhaust turbine can allow the engine to idle down without surge while keeping the turbo nice and hot and in boost.
so no recirc, no internal wastegate - - you would want as much control over this as possible.. electronic wastegate, plumbing excess boost directly behind turbo. So post-burn chamber, does that count as anti-lag in the sense of it combusting post-work? or is the closed loop keeping stoich in consideration outside the combustion chamber?
Very cool to see that on a car. I used to be an aircraft engine mechanic. Every modern passenger aircraft engine has that system. It’s called “bleed valve”.
Yes, basically all inventions that appeared in car engines were used earlier in aviation.
@@jareknowak8712 I think it is actually the other way around
@@brianbob7514 Forced induction, turbos, superchargers, intercoolers, nitrous, water-meth, high octane fuel, liquid cooling, multivalve, overhead cams, sodium filled valves, fuel injection plus a lot more came from aviation. Automotive is about 60 years behind except in electronics.
Glad someone finally mentions this! :D
92/80?!?! That’s a healthy unit.
HPA🏆🏆🏆
Bloody brilliant
Very clever
With new styles of turbo mostly have anti surge housings is it needed to have a bov?
Much better solution is to bleed the air and keep the turbine spinning, than to drop the exhaust pressure and slow down the turbine.
Didn’t in older f1 cars use a larger t/b in front of the turbo to cavitate the compressor to get around surge and decrease lag??
You can use an eBOV instead of a poorly sealing butterfly valve.
They've been unreliable from what I've seen
@@2511jeremy witch car ha a problem with them ....from the 3 cars I saw them testing on they heald up just fine ....genuinely curious with one of the cars had the problems and what went wrong 🤔
@@thedaredevil1907 big boost makes a seat style valve hard to control, the same as a wastegate.
City busses here in San Diego flutter all the time, I've always wondered what kind of damage it's doing, they also brak down all the time 🤣
If its happening while the throttle is closed its probably not their reliability issue to be fair, but interesting to know haha, cheers for sharing - Taz
Are they CNG busses? I'm a trucker and part of our fleet is CNG tractors. They all have the same Cummins engine, and that thing flutters like crazy. Letting off the pedal after hammering it for just a few seconds would get you a good flutter noise.
EDIT: Managed to find what seems to be a fairly complete list of busses they use, and the vast majority of the larger busses are CNG powered with Cummins engines. Our oldest CNG tractors are 10 years old now, and we got some new ones last year, complete with the flutter, so I'm guessing there is an advantage, or at least no disadvantage, with letting those CNG engines flutter like that.
More air than the engine can consume- at that low of turbo wheel speed.
I see a lot of people run no bov 🤷
What vehicle is the small dbw throttle off please?
I think its bosch 32mm from lada
Could ya use some pictures on the next time you explain this..??..maybe with colors and dramatic emphasis markings like boom and pow and whoosh and....😜
How does the ethrottle seal and not be blown open at high boost?🤔
It's a butterfly valve.
? could you use oxygen tank or co2 to spool the turbos fasters? not (nos) to spool.
czcams.com/video/lPQqmCiVmec/video.html
Emtron 👍👍
so all this + electronically controlled wastegate + freevalve
i'm happy that internal combustion engine is dead now
all this will lead to ity tiny bity -100500 cylinder engine with all those tech to pass emission and be dead after warranty miles
Please, leave the room.
Shortly after that happens... we all get to enjoy batteries dying just after warranty instead.
The future is indeed bright 🤣
@@jareknowak8712 my guy wants an air-cooled single-carb N/A SOHC V16 with a mechanical throttle body
Very clever