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Old 03-13-2009, 05:58 AM
Blue 12 Blue 12 is offline
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max boost on 5.2?

hey guys, on a stock 5.2 magnum, what is the max amount of boost i can run on 91 octane? also how much timing retard is required as well as what AFR? does it matter if the boost if from a turbo or super charger?(i think im set on a turbo though) how much more boost or timing can be run with an air to air intercooler?
thx!
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94 Dakota SLT 5.2 4x4. dual exh, 6 in lift, 38x12.5in tires...possible MS/Turbo project
01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4
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Old 03-13-2009, 06:25 AM
blwn318 blwn318 is offline
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does not matter where the boost comes from. the intercooler will drop your boost levels 2-3 psi depending on what style you run. as for boost numbers.... all depends on your set up. stock i wouldn't push more then 6-8 psi.
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Old 03-13-2009, 10:07 AM
Blue 12 Blue 12 is offline
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cool, i didnt think so.
so if i were to run an IC i would measure the boost pressure after the IC?(or that 6-8 psi would be 3-6 psi)
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94 Dakota SLT 5.2 4x4. dual exh, 6 in lift, 38x12.5in tires...possible MS/Turbo project
01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4
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Old 03-13-2009, 01:18 PM
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TheOtherDodge TheOtherDodge is offline
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You should run the pressure from the maifold.

If you need a BTM or FMU set up, I have both for sale in the classifieds.
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Old 03-13-2009, 02:22 PM
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Fast360Dak Fast360Dak is offline
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I ran 10 psi on a stock 318 block and cracked it.
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Old 03-13-2009, 02:32 PM
blwn318 blwn318 is offline
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Originally Posted by Fast360Dak View Post
I ran 10 psi on a stock 318 block and cracked it.
yes but yours broke due to the homosexuality of the truck. it would rather not exist then power a genII
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Old 03-13-2009, 07:14 PM
Blue 12 Blue 12 is offline
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lol....

im actually going to be using MS to control fuel and ign. what size injectors should i be using with normal fuel pressure and will the stock pump flow enough volume?
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94 Dakota SLT 5.2 4x4. dual exh, 6 in lift, 38x12.5in tires...possible MS/Turbo project
01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4
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Old 03-13-2009, 07:33 PM
blwn318 blwn318 is offline
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upgrade the in tank pump and put a inline aux pump as well. i ran mine on low boost with 19lb injectors for a min. then put in larger ones.
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Old 03-13-2009, 07:46 PM
Blue 12 Blue 12 is offline
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why would i need 2 pumps?
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01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4
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Old 03-13-2009, 07:49 PM
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2>1
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Old 03-13-2009, 07:56 PM
blwn318 blwn318 is offline
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the stock pump will not flow enough when you get into boost. you run a aux pump to up the pressure with boost.
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Old 03-13-2009, 07:58 PM
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I wouldn't even try running more than 7 or 8 psi on 91 octane without some sort of timing retard.
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Old 03-13-2009, 08:03 PM
Blue 12 Blue 12 is offline
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if you buy a replacement in tank pump, why not just get one big enough to avoid buying an inline pump??

MS can retard as much timing as i want
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94 Dakota SLT 5.2 4x4. dual exh, 6 in lift, 38x12.5in tires...possible MS/Turbo project
01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4
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  #14  
Old 03-13-2009, 08:04 PM
blwn318 blwn318 is offline
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you can do that if you want. i have two just cause it made it easier to plump the FMU.
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  #15  
Old 03-13-2009, 08:17 PM
Blue 12 Blue 12 is offline
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i wont be using an fmu, so 24 # injectors? larger?
thx
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94 Dakota SLT 5.2 4x4. dual exh, 6 in lift, 38x12.5in tires...possible MS/Turbo project
01 ZX-12R nitrous powered street/drag bike. 9.02@157 in the 1/4

Last edited by Blue 12; 03-13-2009 at 08:58 PM.
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