should i change puley?
#1
05-25-2014, 08:32 PM
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should i change puley?
New bigger fuel pump is installed because 255 lph was only good to 4900 rpms. Tune was started with 3.40 pulley. 3.00 pulley died at 4500 rpms but had more gotten end. I have a 3.20 pulley, so should I try that pulley when I take it to tuner to have tune adjusted for new pump? 255 was only good to 4900 rpms before leaning out. I have added extra idler pulley to setup to help with belt slip. What do you guys think?
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05-25-2014, 09:08 PM
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#5
05-25-2014, 09:57 PM
#6
05-25-2014, 10:38 PM
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A 255lph pump delivers about 410lb of fuel per hour so that's enough to feed about 750 crank hp with forced induction (assuming 0.55 BSFC) and yours is likely 0.6 or higher and 900 crank hp NA (assuming 0.45 BSFC).
Last edited by twinskrewd; 05-25-2014 at 10:41 PM.
#7
05-26-2014, 08:43 AM
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Visit Walbro's website. All of the in-tank 255lph pumps GSS340, GSS341, and the GSS342 are rated at 500+hp. If you visit the Mustang forums you'll see those guys pushing 500+rwhp on the 255lph Walbro's.
A 255lph pump delivers about 410lb of fuel per hour so that's enough to feed about 750 crank hp with forced induction (assuming 0.55 BSFC) and yours is likely 0.6 or higher and 900 crank hp NA (assuming 0.45 BSFC).
A 255lph pump delivers about 410lb of fuel per hour so that's enough to feed about 750 crank hp with forced induction (assuming 0.55 BSFC) and yours is likely 0.6 or higher and 900 crank hp NA (assuming 0.45 BSFC).
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#8
05-26-2014, 08:50 AM
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It's a AEM pump. Part # AEM-50-1000. Crash got it for me through FORE Innovations.
#9
05-27-2014, 03:21 PM
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$100 plus $8 for a sock for the 340. I am a dealer, and you know I don't want you guys to pay retail for anything. Be advised, this is the first truck we have recommended the AEM 340 on. This is a forged engine, equipped with a D-1SC, a 3-core IC, and is at 15 PSI. We are nearing the limit of pump gas until I see data.
JBravo- Let's get back on the dyno and see what it does at 15 PSI when we give it fuel. Then call me and we can go over the next mods. I do not want to give up what you are making due to belt slip. With the idler mod installed, do you see any belt dust? Are you thinking you want to increase boost prior to tuning, and do it once? I understand this, but I simply would like for you to call me so we can discuss it. You KNOW I am available. Let's get a game plan first.
Ensure your dyno has as much airflow as possible across the intercooler. I want to see IPW. Would love to compare your last dyno with the latest after the pump is installed. Also, if we lose control of charge temps (NOT inherent characteristics of the 3-core), we could end up losing power as boost level increases. We have tested the IC you have with an F-1A, and it should support 700 RWHP. I think you are fine with it...
.
There has been some debate on what the Walbro will support. I am not going to re-enter the debate here, because this truck's rev-limit was set at 5000 because it went lean on top. But different companies say different things. When it comes to fuel systems, I consult Fore Innovations first. Fuel systems is all they do. John's tuner did this for a reason.
JBravo- Let's get back on the dyno and see what it does at 15 PSI when we give it fuel. Then call me and we can go over the next mods. I do not want to give up what you are making due to belt slip. With the idler mod installed, do you see any belt dust? Are you thinking you want to increase boost prior to tuning, and do it once? I understand this, but I simply would like for you to call me so we can discuss it. You KNOW I am available. Let's get a game plan first.
Ensure your dyno has as much airflow as possible across the intercooler. I want to see IPW. Would love to compare your last dyno with the latest after the pump is installed. Also, if we lose control of charge temps (NOT inherent characteristics of the 3-core), we could end up losing power as boost level increases. We have tested the IC you have with an F-1A, and it should support 700 RWHP. I think you are fine with it...
. There has been some debate on what the Walbro will support. I am not going to re-enter the debate here, because this truck's rev-limit was set at 5000 because it went lean on top. But different companies say different things. When it comes to fuel systems, I consult Fore Innovations first. Fuel systems is all they do. John's tuner did this for a reason.
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05-27-2014, 04:51 PM
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#11
05-27-2014, 05:41 PM
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Called shop to set up appointment and mentioned pulley change. He said let's check tune with new pump and we will talk about pulley. Didn't sound like he wanted to change pulley until he checked tune using the one that's on the truck right now. So you were right once again Crash. You must be a mind reader LOL.
#12
05-27-2014, 06:30 PM
Widj- I thought for some reason, you had an 04-up, Roushcharged, as posted in your signature. Do you have two trucks you are modding? I see a '97 in your garage. In looking at the "Upgrade Questions" thread, I thought we were dealing with a Roush on a 3-valve. Please advise.
I do not see a 97 in my garage
#14
05-28-2014, 11:00 AM
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Here's a nice little write up of what it takes to make one of these 340 pumps work in the return-less system such as we have on our 04+ trucks. Not a mod for the faint of heart. And be ready lay some money down for tuning. I don't mean that as a discouragement to anyone just a heads up of what your getting in to.
http://www.chicagolandmustang.com/fo...ss-system-test
http://www.chicagolandmustang.com/fo...ss-system-test
#15
05-28-2014, 12:29 PM
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Here's a nice little write up of what it takes to make one of these 340 pumps work in the return-less system such as we have on our 04+ trucks. Not a mod for the faint of heart. And be ready lay some money down for tuning. I don't mean that as a discouragement to anyone just a heads up of what your getting in to.
http://www.chicagolandmustang.com/fo...ss-system-test
http://www.chicagolandmustang.com/fo...ss-system-test