Boost bleeding off, is it my cam?
#1
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I read the sticky and it says that a lower LSA could cause boost to bleed off, I have a TR224 on a 112 could this cam be the cause? Its not that much just a pound or two only at higher RPM levels. Here's an HPT log if you'd like to see, I'd just like to know for sure whats causing this.
#3
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I do not think that cam is the cause, it has right around 0 degrees of overlap. Doesn't seem like enough overlap to bleed off any noticeable amount of boost.
Anyway, in a turbo setup WG is referenced to manifold pressure so even if the cam bleeds off boost the WG should close more and spin the turbo a little more and make up for the difference.
If your WG / boost controller is not manifold referenced I would move the vac line so it is.
Anyway, in a turbo setup WG is referenced to manifold pressure so even if the cam bleeds off boost the WG should close more and spin the turbo a little more and make up for the difference.
If your WG / boost controller is not manifold referenced I would move the vac line so it is.
#4
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I am having the same problem. I drop from 12# to 10#. I was thinking maybe my Boost controller is ****. It has coarse and fine adjustments. The fine is completely useless and changes nothing. I am baffled on the problem.
#5
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I do not think that cam is the cause, it has right around 0 degrees of overlap. Doesn't seem like enough overlap to bleed off any noticeable amount of boost.
Anyway, in a turbo setup WG is referenced to manifold pressure so even if the cam bleeds off boost the WG should close more and spin the turbo a little more and make up for the difference.
If your WG / boost controller is not manifold referenced I would move the vac line so it is.
Anyway, in a turbo setup WG is referenced to manifold pressure so even if the cam bleeds off boost the WG should close more and spin the turbo a little more and make up for the difference.
If your WG / boost controller is not manifold referenced I would move the vac line so it is.
The boost controller is a Turbonetics manual, I have it referenced down stream from the intercooler before the trottle body. I just read the instructions for the boost controller again and noticed that its supposed to be down stream from the throttle body.
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#10
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I ran a 224/224-112 and it was the best cam i have ever ran. It did not bleed off boost at all, but it did flow a ton of air. In fact mine was bigger than most 224s as it was a 283/293 adv duration with .565 lift. It is far from the cams fault, there is a problem in the piping or boost control
#11
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I ran a 224/224-112 and it was the best cam i have ever ran. It did not bleed off boost at all, but it did flow a ton of air. In fact mine was bigger than most 224s as it was a 283/293 adv duration with .565 lift. It is far from the cams fault, there is a problem in the piping or boost control
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#12
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Got the boost controller hooked up the right way this evening. Took it out to make a log and OH MY GOD!!! Is it way faster, I cant keep the tires from spinning!! It spools in a fraction of the time it used to, the boost dosent bleed off, & the boost curve is way more smooth now. Thanks again.