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Hallman Pro Evolution RX

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Old Feb 24, 2004 | 06:28 AM
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Question Hallman Pro Evolution RX

Thanks in advance for your help! I just received this manual boost controller. My single question is this:

Should I go ahead and install the heavy spring? The directions said that the light spring will go, I believe, 5 psi over stock. Has anyone made use of the heavy spring?

Again, thanks...
Old Feb 24, 2004 | 06:54 AM
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i left the spring that came with it in. i hit 20psi fine. i might go ahead and install the heavy spring though because i do have a little amount of taper to about 18/19.
Old Feb 24, 2004 | 09:38 AM
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The wastgate spring on the EVO is between 12 and 14 psi, so using the small spring will get you a max boost of around 18 just like SuperchargedGTZ is getting. I would go with the heavy spring myself.

Keith
Old Feb 24, 2004 | 09:42 AM
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kew...I couldn't remember what the stock wastgate is pushing...thanks for the replies!
Old Feb 24, 2004 | 10:23 AM
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Originally posted by Fourdoor
The wastgate spring on the EVO is between 12 and 14 psi, so using the small spring will get you a max boost of around 18 just like SuperchargedGTZ is getting. I would go with the heavy spring myself.

Keith
well i am getting 20 psi for about up to 6000rpm then it tapers to about 18.
Old Feb 24, 2004 | 01:28 PM
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Originally posted by SuperchargedGTZ


well i am getting 20 psi for about up to 6000rpm then it tapers to about 18.
Hmmm, either you got a WG actuator that is way on the high side of normal stock, or they are being conservative by saying the light spring will only gain you 5 psi. How much adjustment do you have left on the controler?

You can check your WG spring pressure by dialing the boost controller all the way down and seeing what boost you are getting. I would like to know the 411 on this as well

Keith
Old Feb 24, 2004 | 01:41 PM
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Originally posted by Fourdoor


Hmmm, either you got a WG actuator that is way on the high side of normal stock, or they are being conservative by saying the light spring will only gain you 5 psi. How much adjustment do you have left on the controler?

You can check your WG spring pressure by dialing the boost controller all the way down and seeing what boost you are getting. I would like to know the 411 on this as well

Keith
ok...i will try this tonight. But if i remember. when i had the MBC dialed all the way out after setting it up, i think the car boosted 10psi. (i could be wrong)....but i had to crank the crap out of it to get it to boost to 20. It def. made me happy that i got the one you can control inside the cabin.

i will investigate a little further for you
Old Feb 24, 2004 | 04:27 PM
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Originally posted by SuperchargedGTZ


well i am getting 20 psi for about up to 6000rpm then it tapers to about 18.
My Evolution Pro RX does the same thing as yours
Old Feb 28, 2004 | 12:32 PM
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Ok... I changed to the Heavy spring today.

I am still getting haveing my boost taper down from 19 psi, to 17-16psi by the time I hit 7K rpm

And now I am getting 24psi boost spikes at what seems to be completely random times >=(
Old Feb 28, 2004 | 01:44 PM
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Originally posted by GottaGoFaster


My Evolution Pro RX does the same thing as yours
samee here

-non
Old Feb 28, 2004 | 03:25 PM
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Messed with it and it hasn't spiked again... but still has the Taper. Gets down to about 17 psi by 7K rpm.
Old Feb 28, 2004 | 05:10 PM
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The boost tapering...isn't it just the nature of the smallish turbo causing it??
Old Feb 29, 2004 | 08:27 AM
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That amount of taper seems excessive. I also have the Hallman MBC with the heavy spring installed. My boost tapers from 20 to 19. It would help to understand exactly how the MBC was plumbed. Does the MBC feed the wastegate actuator directly or was there some OEM plumbing left in place?




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