CAMARO6 - View Single Post - 2017 Camaro SS 1LE Procharger D1SC question

TJay74 · 06-20-2018, 10:41 AM

Eureka...!!! I found the culprit today.

Well after talking to a friend this morning who had the same issues on his car which is the same car as mine with almost the same mods we think we found the culprit and the reason. We both have a custom ported throttle body on our cars. I spoke with Procharger yesterday and they said the BOV is causing the surging issue due to the standard BOv is only 1.5" and the Race BOV is 2". They said the car is seeing BOV surge that is making it past the BOV and into the intake because I am over the limit for what the standard BOV is designed to handle.

This is where the TB is fitting into the equation. Not only is the TB ported, the TB blade arm was thinned down as well. When I am at steady state cruise the TB blade is partially open, when the surge of air hits the throttle blade the air changes the TB angle and the ECM freaks out as it isnt expecting the TB angle to change and in turn it is adding timing advance to control the expected torque change. This explains why it only happens at part throttle steady state cruise as the blade is only partially open.

Moderate throttle all the way up to going WOT doesnt affect it as the blade is fully open and level in the airstream so the blade angle isnt changing.

When I get home later I am gonna change back over to my stock OEM TB and see how the car does.

06-20-2018, 10:41 AM	#10
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	Eureka...!!! I found the culprit today. Well after talking to a friend this morning who had the same issues on his car which is the same car as mine with almost the same mods we think we found the culprit and the reason. We both have a custom ported throttle body on our cars. I spoke with Procharger yesterday and they said the BOV is causing the surging issue due to the standard BOv is only 1.5" and the Race BOV is 2". They said the car is seeing BOV surge that is making it past the BOV and into the intake because I am over the limit for what the standard BOV is designed to handle. This is where the TB is fitting into the equation. Not only is the TB ported, the TB blade arm was thinned down as well. When I am at steady state cruise the TB blade is partially open, when the surge of air hits the throttle blade the air changes the TB angle and the ECM freaks out as it isnt expecting the TB angle to change and in turn it is adding timing advance to control the expected torque change. This explains why it only happens at part throttle steady state cruise as the blade is only partially open. Moderate throttle all the way up to going WOT doesnt affect it as the blade is fully open and level in the airstream so the blade angle isnt changing. When I get home later I am gonna change back over to my stock OEM TB and see how the car does.