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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Procede vs dinan boost comparison



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      12-11-2007, 07:20 PM   #1
sajakh
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Procede vs dinan boost comparison

Shiv, can you give us any idea of boost across the RPM spectrum like what dinan has done in their press release?

Dinan says
"At higher boost settings in the upper RPM range, the turbosí RPM limit was exceeded, shortening the lifespan of the turbo. Dinan addressed this problem by tapering boost gradually at high RPM. Future plans include adding larger turbos that can handle higher boost pressures at high RPM without compromising the durability of the turbo."

See enclosed dinan pdf. But boost seems to taper off around 4500 rpm to 11 psi from a max of 13.2 under 4500 rpm. But taper drastically 6000 rpm.

How does Procede differ other than the max of 14-15 psi?
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      12-11-2007, 07:36 PM   #2
stillclaimndp
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Quote:
Originally Posted by sajakh View Post
Shiv, can you give us any idea of boost across the RPM spectrum like what dinan has done in their press release?

Dinan says
"At higher boost settings in the upper RPM range, the turbosí RPM limit was exceeded, shortening the lifespan of the turbo. Dinan addressed this problem by tapering boost gradually at high RPM. Future plans include adding larger turbos that can handle higher boost pressures at high RPM without compromising the durability of the turbo."

See enclosed dinan pdf. But boost seems to taper off around 4500 rpm to 11 psi from a max of 13.2 under 4500 rpm. But taper drastically 6000 rpm.

How does Procede differ other than the max of 14-15 psi?
im not shiv but this will tell you what it did at 90% and 92% settings on a 335Vince's car:
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      12-11-2007, 07:40 PM   #3
shiv@vishnu
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Quote:
Originally Posted by sajakh View Post
Shiv, can you give us any idea of boost across the RPM spectrum like what dinan has done in their press release?

Dinan says
"At higher boost settings in the upper RPM range, the turbosí RPM limit was exceeded, shortening the lifespan of the turbo. Dinan addressed this problem by tapering boost gradually at high RPM. Future plans include adding larger turbos that can handle higher boost pressures at high RPM without compromising the durability of the turbo."

See enclosed dinan pdf. But boost seems to taper off around 4500 rpm to 11 psi from a max of 13.2 under 4500 rpm. But taper drastically 6000 rpm.

How does Procede differ other than the max of 14-15 psi?
We try to maintain 13-15psi in the 5000-6000rpm range. Boost is a couple psi lower below and above that range. And we start tapering boost aggressively just above 6500rpm. Might only see 8-10psi way up top.

Shiv
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      12-11-2007, 07:43 PM   #4
sajakh
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Thanks Shiv.

So to compare to dinan's data, v2 is 1-2 psi higher than dinan up to 6000 then tapers down just as aggresively above 6500 just like dinan. That's good.
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