Laurie wrote:

Just how many copies do we need?

AndrewS wrote:

Whats the point of all the plates All holes below 19mm Ø will throw a fault.

i understand you may have try,d holes below this but it looks like vechicles , EGR airflow sensors vary alot!!! i,m running mine at the min with an 8mm hole. with no management lights. also to get most out of blanking the less recycled air the better. so i think its right to start with a smaller hole and find what suits individual engines... are you worried about fault codes or like me just don,t want management light on?

Robofarmer wrote:

i understand you may have try,d holes below this but it looks like vechicles , EGR airflow sensors vary alot!!! i,m running mine at the min with an 8mm hole. with no management lights. also to get most out of blanking the less recycled air the better. so i think its right to start with a smaller hole and find what suits individual engines... are you worried about fault codes or like me just don,t want management light on?

Laurie wrote:

I'm probably going to get slagged off for this but....
Simple English grammar and spelling would make this advert more plausible.
Who is going to buy something from someone who can't even be bothered to use their shift key?

Ooops sorry teacher thought i was on a forum not in a english class

Robofarmer wrote:

AndrewS wrote:

Whats the point of all the plates All holes below 19mm Ø will throw a fault.

i understand you may have try,d holes below this but it looks like vechicles , EGR airflow sensors vary alot!!! i,m running mine at the min with an 8mm hole. with no management lights. also to get most out of blanking the less recycled air the better. so i think its right to start with a smaller hole and find what suits individual engines... are you worried about fault codes or like me just don,t want management light on?

Fair comment However how long have you had the 8mm Ø plate installed and how many miles have you covered

The vehicle requires the fault to show 3 times successively to throw the light up. I cover on average 300 to 1000 miles a week in all driving conditions. We could go for weeks before the light would come on, we would check the for reason why the light come on, if it was related to air flow, we would clear the faults and enlarge the hole and start all over again. This process took over 6 months to conclude that the 19mm Ø hole was the minimum Ø to reduce the air flow but also keep the light out

If you look at the pictures below showing the honeycomb matrix of the transfer pipe. There are 19 holes that are 7mmØ. These holes produce a surface area of 731mm². A blanking plate that has a 19mmØ hole in it will completely blank out the perimeter 12 holes totalling in = 462mm². It also blanks part of the the next six in, say a third of each hole, this totals to 77mm². Add these together and you get 539mm² blanked off, this leaves 192mm² open. The 19mmØ hole reduces the usable surface area by 73.73% This figure ain't far off a 3/4 restriction in the air flow. Its a happy compromise in engine performance V the environment V engine management.

19 hole matrix transfer pipe

Click image to enlarge

Restricted blanking plate with a 19mmØ hole.

Click image to enlarge

Now my brain hurts and I am going to have a lie down with a cold flannels on my head.  130's have feeling's as well you know

Robofarmer wrote:

AndrewS wrote:

Whats the point of all the plates All holes below 19mm Ø will throw a fault.

i understand you may have try,d holes below this but it looks like vechicles , EGR airflow sensors vary alot!!! i,m running mine at the min with an 8mm hole. with no management lights. also to get most out of blanking the less recycled air the better. so i think its right to start with a smaller hole and find what suits individual engines... are you worried about fault codes or like me just don,t want management light on?

Fair comment However how long have you had the 8mm Ø plate installed and how many miles have you covered

The vehicle requires the fault to show 3 times successively to throw the light up. I cover on average 300 to 1000 miles a week in all driving conditions. We could go for weeks before the light would come on, we would check the for reason why the light come on, if it was related to air flow, we would clear the faults and enlarge the hole and start all over again. This process took over 6 months to conclude that the 19mm Ø hole was the minimum Ø to reduce the air flow but also keep the light out

If you look at the pictures below showing the honeycomb matrix of the transfer pipe. There are 19 holes that are 7mmØ. These holes produce a surface area of 731mm². A blanking plate that has a 19mmØ hole in it will completely blank out the perimeter 12 holes totalling in = 462mm². It also blanks part of the the next six in, say a third of each hole, this totals to 77mm². Add these together and you get 539mm² blanked off, this leaves 192mm² open. The 19mmØ hole reduces the usable surface area by 73.73% This figure ain't far off a 3/4 restriction in the air flow. Its a happy compromise in engine performance V the environment V engine management.

Agreed the time you have put into your engine / airflow sensor / egr valve testing proves that 19mm is right for your vechicles paramiters. As you know these puma engines seem to vary alot . Thanks for the advice will leave mine at 8mm and let you known what happens.