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  best fuel PSI for a 3.4????

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best fuel PSI for a 3.4???? by NickD3.4
Started on: 04-06-2008 10:43 PM
Replies: 4
Last post by: NickD3.4 on 04-07-2008 02:12 AM
NickD3.4
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Report this Post04-06-2008 10:43 PM Click Here to See the Profile for NickD3.4Click Here to Email NickD3.4Send a Private Message to NickD3.4Direct Link to This Post
whats the best Fuel PSI to run on a 3.4? any one here with a 3.4 pushrod have suggestions? I was going to run at 45 psi, but have made some modifications, so I'm thinking around 50 psi.
thanks!
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Cooter
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Report this Post04-06-2008 11:38 PM Click Here to See the Profile for CooterSend a Private Message to CooterDirect Link to This Post
Get an ALDL cable, download WinAldl and see what numbers are filling the BLM cells. The 'magic number' is 128. Higher numbers mean the ecm is having to add fuel, lower numbers mean the ecm is pulling fuel. You can increase fuel pressure to bring the BLM's down, but be warned that Multec injectors do not like higher pressure and will fail to open. If you log the BLM data, there are people on the board that can use the info to make you a chip and you will not need to mess with the fuel pressure.
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Hudini
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Report this Post04-07-2008 12:10 AM Click Here to See the Profile for HudiniClick Here to Email HudiniSend a Private Message to HudiniDirect Link to This Post
I run mine at 45psi with a high flow pump. I also run a turbo with 10psi boost and 24lbs injectors. I would bet 45psi would be just fine. I agree with Cooter too, use Winaldl to make sure your injectors are not working too hard.
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Electrathon
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Report this Post04-07-2008 12:20 AM Click Here to See the Profile for ElectrathonClick Here to visit Electrathon's HomePageClick Here to Email ElectrathonSend a Private Message to ElectrathonDirect Link to This Post
More is not always better. Definatly monitor the black learn and adjust your preasure accordingly. Many people would be astonished to find out how poorly their car is running if it just ran right.
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NickD3.4
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Report this Post04-07-2008 02:12 AM Click Here to See the Profile for NickD3.4Click Here to Email NickD3.4Send a Private Message to NickD3.4Direct Link to This Post
45 sounds good to me
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