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2008 SOS Upgrade Thread

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Old Aug 25, 2011 | 07:30 PM
  #61  
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Originally Posted by manny-s2000
What injectors are you running? My car made an easy 389whp by 6500rpm and the pump started to loose constant flow. I'm putting an order in for the fb dual hanger with 2 fb340 pumps will my 1000cc injectors keep up?

9.5:1 comp built engine
3.2" SOS pulley (made 20.5 psi on e85)
1200blower.

Fpr is set at 40psi which I think is too low anyway.

Let me know what u guys think.
my ID1000's have no issue with just 1 FB340lph pump but my base fuel pressure is set at 60psi...maybe that is your issue?? ID1000's should be fine for the 1200 blower. But I am no expert at fuel. I would think your injectors would be the limiting factor before the 340LPH pump. Ask your tuner to bump it up to 60psi base first. (you made 20.5psi with the 3.2" pulley!!! I only made 18-19 with a 3.0" and 11:1 CR)

If that doesn't work then you may need ID2000's and not 2 FB340's. Speak with FB first before you dump the money for a dual pump setup. Also my pump isn't even rewired but I am on race fuel and not E85.
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Old Aug 25, 2011 | 07:44 PM
  #62  
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Yea I will have a word with my tuner I don't mind spending some money to make sure my engine doesn't starve of fuel, I look at it as a type of insurance. Fpr needs to be set higher that's for sure.
I have no idea why maybe its the e85 that pumps up the boost but then again the lower comp should see a decrease. I can't answer that lol.
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Old Aug 25, 2011 | 07:51 PM
  #63  
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Originally Posted by manny-s2000
Yea I will have a word with my tuner I don't mind spending some money to make sure my engine doesn't starve of fuel, I look at it as a type of insurance. Fpr needs to be set higher that's for sure.
I have no idea why maybe its the e85 that pumps up the boost but then again the lower comp should see a decrease. I can't answer that lol.

Yeah just speak with FB first. Remember about 2 pumps...If you are tuned to where as both pumps are a MUST then if you lose 1 you may never know until its to late. I would go with ID2000's FIRST before just going with a dual kit. You should never need 2 FB340's with a 1200 blower...maybe a 2000 or 2200(or its a 2500) blower
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Old Aug 25, 2011 | 08:47 PM
  #64  
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I don't understand then why the fb340 wasn't enough could that be because of Lack of power to the pump? Or the fpr was set at 40psi. Then again the tuner should have known that. That's the problem down under! If you don't do the job yourself it will never be right.

I'm using the stock wiring for the pump.

Hypothetically now if your setup with 2 pumps and you're fpr is set at say 60psi will it run a diff psi if one pump goes? Therefore throwing out your tune and you can tell something is wrong before you go booting it and blowing up a motor?
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Old Aug 25, 2011 | 08:51 PM
  #65  
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Originally Posted by manny-s2000
I don't understand then why the fb340 wasn't enough could that be because of power? Or the fpr was set at 40psi. Then again the tuner should have known that. That's the problem down under! If you don't do the job yourself it will never be right.
Are you sure the pump is the issue?

Dont worry I have the same issue here in the States. Evans Tuning has been a great guy to work with and im glad he is my tuner!! Sadly im still trying to find a shop on this side of the state to do the odds and ends (Evans Tuning is over 6 hours away).
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Old Aug 25, 2011 | 08:58 PM
  #66  
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They ran the car on the dyno and unhooked a hose from the fpr into a can and it showed at around 6500 rpm the pump stopped flowing constant they determined it was the pump that way the injectors weren't close to maxing out yet
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Old Aug 25, 2011 | 09:01 PM
  #67  
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Originally Posted by manny-s2000
They ran the car on the dyno and unhooked a hose from the fpr into a can and it showed at around 6500 rpm the pump stopped flowing constant they determined it was the pump that way the injectors weren't close to maxing out yet
is it rewired?
is it a stock FPR?
do you have a fuel pressure guage? if so did it hold stead pressure? What was the pressure at 6500 rpms?

at 6500 rpms you are only make what ~6-8psi or so? IF THAT

speak to JL or LJ from FB before speading that chunk of change
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Old Aug 25, 2011 | 09:42 PM
  #68  
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I have a tomei fpr and gauge the pump is using the stock wiring. To make sure it was the pump they unplugged a hose off the fpr and flowed the fuel into a Jerry can while the car was on the dyno and it flowed constant till 6500 rpm then the flow just died.. He said it started to lean out so he backed off to be safe
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Old Aug 25, 2011 | 09:57 PM
  #69  
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Originally Posted by manny-s2000
I have a tomei fpr and gauge the pump is using the stock wiring. To make sure it was the pump they unplugged a hose off the fpr and flowed the fuel into a Jerry can while the car was on the dyno and it flowed constant till 6500 rpm then the flow just died.. He said it started to lean out so he backed off to be safe
Which model is it?
1/8" NPT seems like it would be to small for our car (also E85) our car runs with a AN6 fitting which is 3/8" also make sure it is hooked up correctly (bottom is exit and front is inlet)

You may need to rewire the pump. (remember im no expert...I just troll ALOT)
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Old Aug 25, 2011 | 10:05 PM
  #70  
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Originally Posted by manny-s2000
They ran the car on the dyno and unhooked a hose from the fpr into a can and it showed at around 6500 rpm the pump stopped flowing constant they determined it was the pump that way the injectors weren't close to maxing out yet
By having the AEM program open, they can see the injector duty cycle % flow rate, thus determining if it requires larger or not etc.
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