boost pipe-psi question?

ADRENLN · May 5, 2005

say you have your blower already, and the tune is set. if you then put on a power pipe and see 1-3 more psi. will the already existing tune be ok? is this actual psi?

its hard to explain. say i wasnt to go beyond 10 psi with the blower and the tune, the blower itself is making 10 psi of boost, if i add the power pipe will it screw up the tune, or is it like a cheating type of boost. if it counts, why a power pipe, why not just up the boost on the blower?

WOT · May 5, 2005

Boost is boost. If the tune isn't set up for it it may bee too much. If it is an adaptive tune it will have some room for it.

300bhp/ton · May 5, 2005

what is a 'power pipe'?

And where are you measuring the boost from? The blower or the intake manifold?

Gearbanger 101 · May 5, 2005

Depends how close to the edge the tune is. If you even experienced the slightest hint of detonation with the old tune, it would be a good idea to take her easy until you get a chance to take her back to the rollers.

300bhp/ton said:
what is a 'power pipe'?

And where are you measuring the boost from? The blower or the intake manifold?

It’s kind of measured at both ends, but for this purpose, it’s based on the restriction within the intake. A power pipe is basically a smoother, larger diameter flow pipe situated between the head unit and the throttle body. Doing so will provided less restriction between the two and the additional air stacks up in the manifold.

300bhp/ton · May 5, 2005

Gearbanger 101 said:
Depends how close to the edge the tune is. If you even experienced the slightest hint of detonation with the old tune, it would be a good idea to take her easy until you get a chance to take her back to the rollers.

It’s kind of measured at both ends, but for this purpose, it’s based on the restriction within the intake. A power pipe is basically a smoother, larger diameter flow pipe situated between the head unit and the throttle body. Doing so will provided less restriction between the two and the additional air stacks up in the manifold.

right o, I'm with ya now, think its basically the 'big tube' kit that KB offer. In that case you need to make sure your MAF and intake system are also upto the job.

And yes IMO if you expect any gains due to the increased potential for air flow then it will need a tune as the A/F will be different, if the blower is not making use of the extra air flow as it didn't need it, then it will probably be ok, but you will have no gain at all.

Best advice get a tune, it may cost a few $$$'s but will be a lot cheaper than blowing the engine.

cold96snake · May 5, 2005

Gearbanger 101 said:
A power pipe is basically a smoother, larger diameter flow pipe situated between the head unit and the throttle body. Doing so will provided less restriction between the two and the additional air stacks up in the manifold.

Ummm, my power pipe runs from the air filter/MAF to the head unit.

Gearbanger 101 · May 5, 2005

As far as I know, they can either run between the Head Unit and Mass air, or the full length from the MAF all the way to the T/B.

2000 blown conv · May 5, 2005

cold96snake said:
Ummm, my power pipe runs from the air filter/MAF to the head unit.

Correct,,powerpipe runs from massair to the head unit...The pipe running from head unit to throttle body is your discharge tube. added boost comes from getting a higher "volume" of air "into" your head unit..The air in you discharge tube after your head unit is already being compressed all the way into your intake ,,,and won't give you more boost going to a bigger discharge tube..

Gearbanger 101 · May 5, 2005

2000 blown conv said:
Correct,,powerpipe runs from massair to the head unit...The pipe running from head unit to throttle body is your discharge tube. added boost comes from getting a higher "volume" of air "into" your head unit..The air in you discharge tube after your head unit is already being compressed all the way into your intake ,,,and won't give you more boost going to a bigger discharge tube..

Like I said....it works both ways in some cases. Remember, us Positive displacement blown guys don't have a head unit before the Mass Air meter like you centrifugal guys do. So in a sense, the discharge tube is our power pipe and does in fact increase boost levels when straitened and enlarged. Sorry, I could have worded it better earlier.

boost pipe-psi question?

ADRENLN

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