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what parts are needed to increase boost for Stillen Supercharger

As of right now I have the following parts/upgrades on my car: Stillen supercharger topgunz air to air upgrade walbro 520 ID1050x injectors CJM twin fuel pump CJM S1.SE return

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what parts are needed to increase boost for Stillen Supercharger what parts are needed to increase boost for Stillen Supercharger
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Old 12-29-2019, 01:53 PM   #1 (permalink)
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Default what parts are needed to increase boost for Stillen Supercharger
As of right now I have the following parts/upgrades on my car:
  • Stillen supercharger
  • topgunz air to air upgrade
  • walbro 520
  • ID1050x injectors
  • CJM twin fuel pump
  • CJM S1.SE return system
  • Motordyne cats and catback exhaust
  • Stillen headers

I've read over 50 pages on the A2A thread and cant get a definitive answer on what parts are needed. I'm looking to get around 500-550hp. Also I will be running 91. Also Seb is currently tuning my car. Thanks for the help!
Last edited by DUSHER; 12-29-2019 at 02:04 PM.
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Old 12-29-2019, 01:57 PM   #2 (permalink)
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How much power are you planning to make ?
That would tend to determine what upgrades are needed



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Old 12-29-2019, 02:01 PM   #3 (permalink)
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How much power are you planning to make ?
That would tend to determine what upgrades are needed



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good point and I was just thinking about adding that. Would be happy to be around 500-550. Will be running 91 octane unless you guys recommend other wise.
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Old 12-29-2019, 02:07 PM   #4 (permalink)
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good point and I was just thinking about adding that. Would be happy to be around 500-550. Will be running 91 octane unless you guys recommend other wise.
13 psi is about the max you'll be able to run on 91 octane. With the 9lb pulley and a 2.85 sc pulley, my car made 12.86 psi and 586whp on e85 with the same upgrades that you have. I can't remember what my 91 octane numbers were but was probably a little over 500.

I would go flex fuel. 91 and e85.
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Old 12-29-2019, 02:09 PM   #5 (permalink)
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You list a single walbro 520 but then you show a CJM twin pump. Why would you have a twin pump set up with a single pump?
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Old 12-29-2019, 02:16 PM   #6 (permalink)
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You list a single walbro 520 but then you show a CJM twin pump. Why would you have a twin pump set up with a single pump?
I got the twin fuel pump assembly for a pretty good price. Also when I took out my stock pump assembly the rods were already broken. So instead of buying a new nissan oem assembly I just bought the twin assembly for a good price.
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Old 12-29-2019, 02:19 PM   #7 (permalink)
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I got the twin fuel pump assembly for a pretty good price. Also when I took out my stock pump assembly the rods were already broken. So instead of buying a new nissan oem assembly I just bought the twin assembly for a good price.
And when you want to go for big power (and you will), you'll need twin pumps.
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Old 12-29-2019, 02:35 PM   #8 (permalink)
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And when you want to go for big power (and you will), you'll need twin pumps.
After reading spooler's thread I dont think that will be the case. I dont feel like replacing the block lol.
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Old 12-29-2019, 02:41 PM   #9 (permalink)
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After reading spooler's thread I dont think that will be the case. I dont feel like replacing the block lol.
You'd never be making enough boost to lift the heads.
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Old 12-29-2019, 02:42 PM   #10 (permalink)
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You'd never be making enough boost to lift the heads.
Haven't our engine's been known to do that around 12/13 psi

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Old 12-29-2019, 02:53 PM   #11 (permalink)
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Haven't our engine's been known to do that around 12/13 psi

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Not sure but mine had no issues at 16.5.
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Old 12-29-2019, 02:58 PM   #12 (permalink)
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Not sure but mine had no issues at 16.5.
That's good to know

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Old 12-29-2019, 03:02 PM   #13 (permalink)
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Haven't our engine's been known to do that around 12/13 psi

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It depends on what fuel your using. Boost pressure is knock limited.
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Old 12-29-2019, 03:05 PM   #14 (permalink)
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It depends on what fuel your using. Boost pressure is knock limited.
Here in uk its 99 octane
I believe that's like your 91

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Old 12-29-2019, 03:07 PM   #15 (permalink)
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Originally Posted by DUSHER View Post
As of right now I have the following parts/upgrades on my car:
  • Stillen supercharger
  • topgunz air to air upgrade
  • walbro 520
  • ID1050x injectors
  • CJM twin fuel pump
  • CJM S1.SE return system
  • Motordyne cats and catback exhaust
  • Stillen headers

I've read over 50 pages on the A2A thread and cant get a definitive answer on what parts are needed. I'm looking to get around 500-550hp. Also I will be running 91. Also Seb is currently tuning my car. Thanks for the help!
Single 520 paired with 1050 is way overkill for 91. Not good to run rich in low boost.
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