more performance
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Junior Member
Joined: May 2007
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From: Mobile, Alabama
more performance
i have an 04 f150 4x4, (new body style) and are looking to gain some hp's without breaking the bank. my truck is stock, but i have ordered a leveling kit, and an air raid cold air kit for it so far. some time this week i'm upgrading the exhaust. is their anything else you can do to the newer body styles with the 3 valve motor to boost the performance? thanks
Senior Member
Joined: Aug 2007
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From: Des Moines, IA
Look into custom tuning. You can get it done for around $500-$600. This is going to be the biggest bang for your buck mod. Also check out underdrive pullies (200-ish) gears (2k-ish) and if you want to go all the way. Supercharger.
Technical Article Contributor
Joined: Apr 2007
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From: Pearl Harbor
gears and tuner...the other stuff (CAI and Exhaust) are more for pleasure than performance
e-fan the truck instead of Underdrive Pulleys. the general concensus is that UDP's are inneffective...but e-fan does free up some ponies...oh yeah, and with UDP's, you need a programmer to reset your idle so the alternator will work
e-fan the truck instead of Underdrive Pulleys. the general concensus is that UDP's are inneffective...but e-fan does free up some ponies...oh yeah, and with UDP's, you need a programmer to reset your idle so the alternator will work
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Alternator is controlled by the PCM. You do not have to change idle speed for it to work.
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Joined: Apr 2007
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From: Pearl Harbor
actually you do have to bump idle speed up
the idle speed is not sufficient when you re-route the new belt and UDP's. the alternator is spinning too slowly and therefore is below minimum speed to generate power
all PCM does is tell Alt to charge or not charge
the idle speed is not sufficient when you re-route the new belt and UDP's. the alternator is spinning too slowly and therefore is below minimum speed to generate power
all PCM does is tell Alt to charge or not charge
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I am giving you a chance here, you have a source?
Last edited by i.ride.suzuki; Jun 30, 2008 at 06:30 PM.
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From: Pearl Harbor
been looking Suzuki...and honestly it seems people are 50/50 about the alternator issue. that being said, I cannot find hard facts for my position or your position. I e-mailed Troyer about the question...and hopefully we'll get a 100% answer from an acknowledged expert
I found this post by Mike Troyer himself, It's mostly talking about big stereo systems and aftermarket alt's...but it does address the need to bump idle higher with tuning and not how the computer does it automatically
also, Troyer says that while using his UDP's the alt "only requires 850 rpm of engine speed to provide normal alternator output". so what happens when the alt speed drops even slower and you don't adjust the idle speed?
anyways,
Underdrive Pulley Question in Chips/Tuners/Programming Forum
what does that chart you posted mean? can't make heads/tails of it
I found this post by Mike Troyer himself, It's mostly talking about big stereo systems and aftermarket alt's...but it does address the need to bump idle higher with tuning and not how the computer does it automatically
also, Troyer says that while using his UDP's the alt "only requires 850 rpm of engine speed to provide normal alternator output". so what happens when the alt speed drops even slower and you don't adjust the idle speed?
anyways,
Underdrive Pulley Question in Chips/Tuners/Programming Forum
Originally Posted by Superchips_Distributor
A/C performance, alternator performance, power steering performance, etc. are critical in these heavier trucks. You'll actually see reference to the Mustang 4.6 in our F-150 underdrive pulley instructions, because we use them on the 4.6 Mustangs if they are driven on the street.
Our 2-piece set for the 1997-2004 V8 F-150's (all years from 1997 on up, including 2004, and with 4.6 or either 2-valve or 3-valve 5.4's) only requires 850 rpm of engine speed to provide normal alternator output. We use a smaller crankshaft pulley to slow the chain down, and then a *larger* water pump pulley to restore proper coolant flow thru the motor.
There is an option that a number of people have had us do for them in this situation (where you have already upgraded to a bigger alternator, but still don't have enough power at idle), and that is to have us do a custom tune for your truck - for the automatic transmission models, we can just bump up the idle speed in gear - we can move it up in the program just enough so you've got sufficient alternator output, power steering output & A/C performance in summertime, when idling in gear.
For those with manual trannys, they obviously don't have an "in gear" idle speed adjustment, they just have the basic idle speed parameter - so we just bump that up a bit and that takes care of allowing them to run the pulleys they want along with a lot of other things like electric fans & underdrive pulleys, big stereos, a lot of auxiliary lighting, etc. - even all of that combined. Some of these trucks will also have power steering idle "switches" as well as A/C idle speed adders - and if the truck has that, then we also have control over that, too - like if someone has 37" tires & has to parallel park frequently, we can just increase the amount of idle speed added *only* when the pressure in the power steering pump hits a certain level, or only when the A/C compressor clutch is engaged, etc.
Our 2-piece set for the 1997-2004 V8 F-150's (all years from 1997 on up, including 2004, and with 4.6 or either 2-valve or 3-valve 5.4's) only requires 850 rpm of engine speed to provide normal alternator output. We use a smaller crankshaft pulley to slow the chain down, and then a *larger* water pump pulley to restore proper coolant flow thru the motor.
There is an option that a number of people have had us do for them in this situation (where you have already upgraded to a bigger alternator, but still don't have enough power at idle), and that is to have us do a custom tune for your truck - for the automatic transmission models, we can just bump up the idle speed in gear - we can move it up in the program just enough so you've got sufficient alternator output, power steering output & A/C performance in summertime, when idling in gear.
For those with manual trannys, they obviously don't have an "in gear" idle speed adjustment, they just have the basic idle speed parameter - so we just bump that up a bit and that takes care of allowing them to run the pulleys they want along with a lot of other things like electric fans & underdrive pulleys, big stereos, a lot of auxiliary lighting, etc. - even all of that combined. Some of these trucks will also have power steering idle "switches" as well as A/C idle speed adders - and if the truck has that, then we also have control over that, too - like if someone has 37" tires & has to parallel park frequently, we can just increase the amount of idle speed added *only* when the pressure in the power steering pump hits a certain level, or only when the A/C compressor clutch is engaged, etc.
what does that chart you posted mean? can't make heads/tails of it
Last edited by Tylus; Jun 30, 2008 at 11:27 PM.
Technical Article Contributor
Joined: Jun 2005
Posts: 911
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From: Colorado
You could nickel and dime yourself forever. Or just pony up for a super deal with a Roush Supercharger:
http://cgi.ebay.com/ebaymotors/ROUSH...spagenameZWD1V
Offer $2500. I'm sure Roush will take it.
You won't be disappointed. Trust me.
http://cgi.ebay.com/ebaymotors/ROUSH...spagenameZWD1V
Offer $2500. I'm sure Roush will take it.
You won't be disappointed. Trust me.
Technical Article Contributor
Joined: Jun 2005
Posts: 911
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From: Colorado
