boost reading question
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Fleet Mechanic
Joined: Feb 2008
Posts: 1,955
Likes: 6
From: Eastern PA
boost reading question
i noticed something in my charts normally my map at idle is 100kpa, but it goes up to 190kpa, which is 27psi. However, I blew a hose. I took a picture of that and it was reading 299kpa. I was foot to floor for that. Does that mean I'm overboosting since it's 43psi, or should i be subtracting 100 atmospheric when trying to get boost pressure, so it would be 28psi plus atmosphere?
Fleet Mechanic
Joined: Sep 2006
Posts: 1,491
Likes: 295
From: Fresno, CA
Looks like the MAP you are reading is in absolute pressure since you're seeing about 100kpa at idle (~14.5psi) which matches your baro. To get boost you subtract the barometric pressure. So your worst case would be 299 - 100 = 199kpa or 28-29 psi of boost so you are right where you should be.
I'm pretty sure there is a PID you can pull up in Forscan for boost so you don't have to do the math. And I believe you can get it in psi units instead of kpa, just select a different option from the list.
I'm pretty sure there is a PID you can pull up in Forscan for boost so you don't have to do the math. And I believe you can get it in psi units instead of kpa, just select a different option from the list.
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Fleet Mechanic
Joined: Feb 2008
Posts: 1,955
Likes: 6
From: Eastern PA
Ok the clamps from sinister diesel, clamped to the max, on their boots, blow off. I compared to OEM and max clamp, has a gap. So the material is considerably thicker. But no go for me.
Driving down the road and mashed it. Pop!
Driving down the road and mashed it. Pop!
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