Disclaimer: I don't know anything. I came here to learn from the source after reading the instagram 'experts' comments on this. Swap out that camshaft with a mild lope, low overlap cam and the idle could be smoothed out, correct? So the cam plays a role. The air is restricted by the flaps, while being pulled by a charger, into a combustion chamber with high overlap valves, at low rpm. The charger needs to run at a consistent rpm to pull a consistent volume of air to attain a smooth idle. A nightmare scenario to smooth the idle without raising the rpm. To me it appears that, if it's possible to smooth out the idle with that setup, it would involve painstaking time adjusting fuel injector deltas to reach a consistent injector pulse width at idle.
My cammed corvette is getting a surge whenever i cameback from data log. What could be causing the surge. Thanks. The tps is open at 10% at idle. I havent heard from my tuner yet.. can a dirty air filter cause the surge too?
I have had a similar problem and garage did sorting out but then I found the car was running lean and had a loss of power. I was more worried that the surge would cause damage to my engine. (Would it?) If not then I've got toʻ get garage to give me back the power I've lost.
People are so d*mb… lmao 🤣 Rip a vacuum line off most any computer controlled vehicle and they’ll surge. It’s a lean rich condition. You can make anything with a Holley ecu surge with the IAC correction set to fast. FYI, if you want a badass efi plate with tons of thought and engineering involved, specifically designed for a B&U style hat hit me up! I recently designed a proprietary efi system and am currently working on the patent. Already have 50 kits with hardware made and assembled ready to go. Just waiting for patent pending status before it goes live! 👍🏻🤘🏻👏🏻
What I understand you to be addressing is called blower-surge. This happens bc the intake charge literally changes temperature from hot to cold and back again which effectively alters your idle mixture, repeatedly, due to the density variations of the charge temperature. If you install a fast-acting temp gauge for your charge-air, you would see for yourself
The way I try to get friends to understand this phenomena is it's like a human breathing. When the engine speeds up it's taking a breath, slowing down it's exhaling. If you listen to yourself breath, we make the exact same sound.
FROM CHATGTP: "WHY DOES A BLOWER MOTOR LOPE?" : Blower cars, have a distinctive "lope" in their engine idle due to the interaction between the camshaft profile and the forced induction system. Here’s a breakdown of why this happens: Aggressive Camshaft Profiles: Many blower cars use camshafts with aggressive profiles that have a higher lift and longer duration. This means the valves stay open longer and open wider, allowing more air and fuel to enter the engine and exhaust gases to exit. While this is great for high-RPM power, it creates instability at low RPMs, leading to the uneven, loping idle sound. Vacuum Fluctuations: The aggressive cam profile can cause fluctuations in engine vacuum at idle. Normally, a naturally aspirated engine maintains a consistent vacuum at idle, but in a blower car, the vacuum can be inconsistent due to the overlap of the intake and exhaust valves being open simultaneously. This overlap, combined with the supercharger's influence on airflow, causes the engine to "lope" or have an uneven idle. Supercharger Load: The supercharger itself can place a load on the engine, particularly at idle. This load can cause the engine to drop in RPM slightly, creating an uneven rhythm that contributes to the loping sound. Fuel Delivery and Tuning: The tuning of a blower car, especially if it's running a rich fuel mixture at idle, can exacerbate the lope. The richer mixture combined with the supercharged airflow can make the idle more erratic. In summary, the lope in blower cars is primarily due to the aggressive camshaft design, the interaction between the supercharger and engine airflow, and the specific tuning of the engine. The combination of these factors results in the characteristic loping idle that is often heard in high-performance supercharged vehicles.
Yeah, I have to say that the injector hat flex fits the character of the car just as much as the idle surge. I wouldn’t change a thing.
I love that sound.
Another toy? Glad to see ya doing well, I really miss the old crew from the snake.
Disclaimer: I don't know anything. I came here to learn from the source after reading the instagram 'experts' comments on this.
Swap out that camshaft with a mild lope, low overlap cam and the idle could be smoothed out, correct? So the cam plays a role.
The air is restricted by the flaps, while being pulled by a charger, into a combustion chamber with high overlap valves, at low rpm. The charger needs to run at a consistent rpm to pull a consistent volume of air to attain a smooth idle. A nightmare scenario to smooth the idle without raising the rpm.
To me it appears that, if it's possible to smooth out the idle with that setup, it would involve painstaking time adjusting fuel injector deltas to reach a consistent injector pulse width at idle.
My cammed corvette is getting a surge whenever i cameback from data log. What could be causing the surge. Thanks. The tps is open at 10% at idle. I havent heard from my tuner yet.. can a dirty air filter cause the surge too?
I have had a similar problem and garage did sorting out but then I found the car was running lean and had a loss of power. I was more worried that the surge would cause damage to my engine. (Would it?) If not then I've got toʻ get garage to give me back the power I've lost.
I think I almost understand. Correct me if I'm wrong, if it's not stable, do outbreaks happen?
Want that thing to go fast get with Jon at IRD racing and let him build you a carburetor. Haha
People are so d*mb… lmao 🤣
Rip a vacuum line off most any computer controlled vehicle and they’ll surge.
It’s a lean rich condition. You can make anything with a Holley ecu surge with the IAC correction set to fast.
FYI, if you want a badass efi plate with tons of thought and engineering involved, specifically designed for a B&U style hat hit me up!
I recently designed a proprietary efi system and am currently working on the patent. Already have 50 kits with hardware made and assembled ready to go. Just waiting for patent pending status before it goes live! 👍🏻🤘🏻👏🏻
What I understand you to be addressing is called blower-surge. This happens bc the intake charge literally changes temperature from hot to cold and back again which effectively alters your idle mixture, repeatedly, due to the density variations of the charge temperature. If you install a fast-acting temp gauge for your charge-air, you would see for yourself
Air temp does not change and isn’t the cause of inducing surge. I have that parameter monitored 😎
@@griffinsteinfeld5164 I stand corrected
The way I try to get friends to understand this phenomena is it's like a human breathing. When the engine speeds up it's taking a breath, slowing down it's exhaling. If you listen to yourself breath, we make the exact same sound.
FROM CHATGTP: "WHY DOES A BLOWER MOTOR LOPE?" : Blower cars, have a distinctive "lope" in their engine idle due to the interaction between the camshaft profile and the forced induction system. Here’s a breakdown of why this happens:
Aggressive Camshaft Profiles: Many blower cars use camshafts with aggressive profiles that have a higher lift and longer duration. This means the valves stay open longer and open wider, allowing more air and fuel to enter the engine and exhaust gases to exit. While this is great for high-RPM power, it creates instability at low RPMs, leading to the uneven, loping idle sound.
Vacuum Fluctuations: The aggressive cam profile can cause fluctuations in engine vacuum at idle. Normally, a naturally aspirated engine maintains a consistent vacuum at idle, but in a blower car, the vacuum can be inconsistent due to the overlap of the intake and exhaust valves being open simultaneously. This overlap, combined with the supercharger's influence on airflow, causes the engine to "lope" or have an uneven idle.
Supercharger Load: The supercharger itself can place a load on the engine, particularly at idle. This load can cause the engine to drop in RPM slightly, creating an uneven rhythm that contributes to the loping sound.
Fuel Delivery and Tuning: The tuning of a blower car, especially if it's running a rich fuel mixture at idle, can exacerbate the lope. The richer mixture combined with the supercharged airflow can make the idle more erratic.
In summary, the lope in blower cars is primarily due to the aggressive camshaft design, the interaction between the supercharger and engine airflow, and the specific tuning of the engine. The combination of these factors results in the characteristic loping idle that is often heard in high-performance supercharged vehicles.
I had one for years lean the carb out and it will quit doing that
Absolutely detest blower surge.