lack of power going up hill - Ford Powerstroke Diesel Forum

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post #1 of 5 Old 05-05-2010, 04:07 PM Thread Starter
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lack of power going up hill

Hey guys, so there are a couple of big hills I go over on my way to work, the biggest being about a 1 1/2 mile long probably a 6% grade (quite a hill I know). When I'm going up the hill my truck just feels like its working hard to maintain its speed. I can only get up to about 60 mph unless I floor it in which case I only get 65-67mph and my turbo boost gets to the hig 20s. I've talked to friends that can cruise up the same hill at 75 no problem. My truck is lifted on 37s and still has stock gears, is this my problem? From what I've read I think 4.30s are the way to go. How much of a difference will the gear change make? Thanks!

'05 f350 FX4 CCLB
6" pro comp lift w/Fox shocks
37"x13.50"x20" pro comp Xterrains
4" MBRP turbo-back w/cat delete
Airaid cold air intake
Bulletproof diesel egr cooler and oil cooler
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post #2 of 5 Old 05-05-2010, 04:33 PM
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Just a quick question for ya, did you re-calibrate your speedo to match the tires? If not than I'm guessing your traveling faster than 65 when it displays 65...
But to help you out, yes, definitely need gearing, and yes at least 4.30:1 if not higher,what are your stock gears, 3.73:1 then the stock gears are holding you back, but I'm sure there are plenty more people on hear to help you w/exact calculations to help you out a little more

Vince
-SOLD-'04 F350 CC DRW 6.0L - Studded & deleted - Dieselsite coolant filter -RED ELC - SCT X3 by Innovative & Gearhead-Custom all Billet 5R110-4" Diamond Eye TB Duals-zoodad-ccv mod-all the right gauges
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post #3 of 5 Old 05-05-2010, 04:41 PM Thread Starter
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I haven't re-calibrated yet but in my first post I adjusted my speed for that. So when my speedo says 55 I'm really going 60 and when it reads 60 I'm going about 66. Ya still have the stock 3.73. I wasn't sure how much of a difference the swap would make. I have no problem going 85-90 on flat ground, just the hills

'05 f350 FX4 CCLB
6" pro comp lift w/Fox shocks
37"x13.50"x20" pro comp Xterrains
4" MBRP turbo-back w/cat delete
Airaid cold air intake
Bulletproof diesel egr cooler and oil cooler
gonesurfing is offline  
post #4 of 5 Old 05-06-2010, 01:31 PM
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Alright then, how about a few simple checks before any surgery...you could try checking fuel filters, dirty but not clogged fuel filters wouldn't really show up until under load like hills...got fuel pressure guage...if so, wheres that at when climbing?...just a few other thoughts.

Vince
-SOLD-'04 F350 CC DRW 6.0L - Studded & deleted - Dieselsite coolant filter -RED ELC - SCT X3 by Innovative & Gearhead-Custom all Billet 5R110-4" Diamond Eye TB Duals-zoodad-ccv mod-all the right gauges
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post #5 of 5 Old 05-09-2010, 12:17 PM Thread Starter
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No fuel pressure gauge yet and I just changed my fuel filters with my last oil change. I'll change them out and clean my air filter to see if that helps at all.

'05 f350 FX4 CCLB
6" pro comp lift w/Fox shocks
37"x13.50"x20" pro comp Xterrains
4" MBRP turbo-back w/cat delete
Airaid cold air intake
Bulletproof diesel egr cooler and oil cooler
gonesurfing is offline  
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