Header pressures while under boost?

[WesG]

Question for the guys that have tested this, DaveF I know you have mentioned this before and I am sure others would know this as well.

At different boost levels say 12, 15, 18, 20, 22 lbs, what pressure is in the header?

Asking because I am searching for a leak using a plumbers plug, but the plug will only hold to about 12lbs before it flies out of the dump pipe. I could build a hose and a cap to bump the pressure up higher, but I am wondering if that is needed?

Wes

 

[Ted Jannetty]

Question for the guys that have tested this, DaveF I know you have mentioned this before and I am sure others would know this as well.

At different boost levels say 12, 15, 18, 20, 22 lbs, what pressure is in the header?

Asking because I am searching for a leak using a plumbers plug, but the plug will only hold to about 12lbs before it flies out of the dump pipe. I could build a hose and a cap to bump the pressure up higher, but I am wondering if that is needed?

Wes

It is not a fixed number it is a Dynamic number affected by many factors.

The size of the exhaust wheel and housing combination, VS, engine size, RPM, and Boost level.

The ultimate is a 1:1 back pressure to boost ratio but very hard to achieve with any response.

It is common to see 2:1 which gives great response but high EGT and lower that optimum power.

I can go on and on but I think I answered your question.

 

[WesG]

Thankyou

Thanks Ted. I will build a more sturdy setup to pressure test the exhaust side of things.

Wes