Holding more boost at redline

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Feb 12, 2011 | 04:42 PM

#31

xmaciek82x

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From: ???

Quote:

Originally Posted by joseph143

have you tried the help spring? there is a how to in the engine section...

https://www.evolutionm.net/forums/ev...pring-mod.html

Just an update for you guys. I tried this mod ^ since I had the springs for years sitting in the garage. My boost at redline went from 20.5 to 23.5psi.

Thanks for all the help.

Feb 12, 2011 | 05:06 PM

#32

sparky

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Quote:

Originally Posted by achilles3000

...I had a blox mbc clone of the hallman and was better in terms of spool and the way it held when compared to the hallman funny thing was I paid $70 for it.

Naughty, naughty, naughty for doing a cloning!!!

Feb 12, 2011 | 05:13 PM

#33

sparky

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Quote:

Originally Posted by BLKCarbonEVO

That for the most part is correct. However, there are ways around that. If you shorten the wastegate arm you are shortening the travel of the wastgate arm, limiting how far the wastegates opens and at what psi it cracks. It is common to do this to induce a bit of creep in higher rpms. The only time it becomes a problem is if you start to overspin the turbo. 420-440whp seems to be the safe limit and under a 32ps....Mikey

Mikey is right. Since shortening the wastegate actuator rod may induce some boost creep then you have to be prepared to remove the turbine housing and port the wastegate bypass port for better WG flow.

Are you relocated Mikester? I wanna come visit once you have pinpointed all of the local pubs in the area.

Feb 12, 2011 | 07:42 PM

#34

BLKCarbonEVO

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I'm ready for you when ever sparky

ill buy first round!

Mikey

Feb 12, 2011 | 07:52 PM

#35

Benja

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Ecu boost is easier I think.
I'm peaking 26 and holding 23 to redline on a 9.8turbo, stock dump, stock cooler and piping.
Just downpipe back exhaust and intake.

Feb 12, 2011 | 08:02 PM

#36

sparky

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Seven and eight turbos taper less than IX turbos for some reason. The IX turbo is just the worst with respect to boost taper.

Feb 12, 2011 | 08:09 PM

#37

BLKCarbonEVO

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Quote:

Originally Posted by sparky

Seven and eight turbos taper less than IX turbos for some reason. The IX turbo is just the worst with respect to boost taper.

Funny story... Robert and I were talking about that and we believe the larger compressor cover on the IX may induce more boost taper in higher rpms. We were going to put a VIII cover on my IX just for the fug of it to see what it would do but never got around to it.