37's Vs. 35's Opinions - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 28 Old 03-03-2013, 04:42 PM Thread Starter
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37's Vs. 35's Opinions

I have an opportunity to grab 4 nearly new Mickey Baja AT's for $600.00 and was wondering what other have preferred 35's or 37's and was there that big a difference in mileage, performance and ride quality.

I' have the Icon 4.5" looks llike i'll need the TEI and possibly a taller block or 1" spacer just to keep the ride level.

There's tons of room in the rear but the fronts will likely hit the lower fender well support.

If the TEI doesn't work i'll be looking for a set of 18" OEM's as they don't poke out as much and from what I've read with 37" tires and stock wheels even a 4" lift is sufficient.

Help Please.

denny

2005 CC SB 147K
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Mickey T's Baja ATZ P3 37's
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post #2 of 28 Old 03-03-2013, 08:02 PM
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I'm not sure what a TEI is, but I do know that with about 4"~5" up front (it's a long story, don't ask), I can contact the fender pulling into a parking lot. That being said, I would be going to a 6" lift if I went 37s. I certainly wouldn't go wheelin like I do on 37s without a 6" lift. Wheeling with 35s has proven the need for the hammer mod on the front fenders. The other thing that I would do if I had 37s would be to go with 4.30 gears.

As far as mpg, going from 33s to 35s, I dropped 2 mpg like it was cool. I can only imagine what I would lose going to 37s. A friend had 38s (yes I know you said 37, but it's close enough for gov't work) with 3.73s and said his mileage was really bad.

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post #3 of 28 Old 03-03-2013, 09:26 PM
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Re: 37's Vs. 35's Opinions

Talking to others with 37s and stock gearing, they pretty much said it's a dog and bad mileage. Depending on your wheel offset, they might rub, they might not. I run 35s with just a leveling kit, with minor rubbing on fender well..

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2003 F-350 6.0L.
Leveling kit
35/12.50-20 Federal Couragia M/T
20x10 black Fuel Hostage wheels
4"-5" exhaust no cat
Airaid intake
SCT tuner-awaiting custom tune
Edge Insight CTS
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post #4 of 28 Old 03-04-2013, 08:31 AM
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I've run both, just recently put 37's on mine. Tsl boggers...they're on 17" fuel hostage rims. Now...the boggers kinda add a grey area to the ride comfort category...its like riding on tractor tires. Aside from that, it rides OK when the tires warm up and stop bumping along with the flat spots from sitting all night...gotta love bias ply. I don't get stuck anywhere anymore, lol.

I run a 4.5" icon kit, fox racing shocks with external resevior, and some cheapy eBay leveling spacers under the front spring perch...its 2.5" tall, and a 3 inch block in back in addiction to the 5 Inch block the icon came with.

Ride is better than stock...I need a steering stabilizer and an alignment badly, but again the boggers play into making the road manors worse. If they were a good radial tire like what you're looking at, I wouldn't have any complaints. My mileage has been crap with trans issues I'm having... but I hasn't seemed to get much worse with tires. Definitely not a pig with a tune and ficm tuner. I don't see any huge need to regear right now. If I was going much bigger than 38's I would regear but I wouldn't say its necessary...my truck has 3.73's stock...I think most of the diesels do...maybe some have 4.10's?

All in all I'm pretty happy with it.



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post #5 of 28 Old 03-04-2013, 09:13 AM
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I run a 37/13.50 with a 4-Link BDS 6" lift. It only rubs the inner liner on tight parking lot manuvers. It was a little sluggish with the stock 3.73's untill I switched to a 4.56 which is very steap. 4.30's might be a little more road friendly.

06 F250 Reg Cab. ARP's, RCD Billet Powermax, Warren 190/100's, Areo A1000 Pump, Driven Diesel Reg Return, All AN Lines from the sump, Intake and Exhaust, 4" BDS Lift, Long Arm 4-Link, Dana 80 swap, 1480 u-joints, 4"/.108 driveline, Detroit Lockers (both axles), Warren Trans w/ Billet Shafts, Drive Flanges, 35"s, Traction Bars, Front Suspension Stops(For Tug-A-Truck), Rear Suspension Stops, Custom Hitch, Roll Pan, Lots of Drive Shafts, Axles, and Pinions.
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post #6 of 28 Old 03-04-2013, 09:20 AM
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Gearhead, got any pics of your truck on Boggers? I bet it looks freaking mean as hell.



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post #7 of 28 Old 03-04-2013, 04:50 PM
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I have 37s on 10" lift and have smashed my front fenders and my bed. Depends on how much your suspension actually travels and how hard you push them. If I ran 37s on 4 or 6" I would just remove the fenders and the bed.

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post #8 of 28 Old 03-04-2013, 05:11 PM
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Quote:
Originally Posted by Dirty_Stroke View Post
Gearhead, got any pics of your truck on Boggers? I bet it looks freaking mean as hell.
I'll get some up soon and maybe update my profile pics and all finally.


Quote:
Originally Posted by jetjock15 View Post
I have 37s on 10" lift and have smashed my front fenders and my bed. Depends on how much your suspension actually travels and how hard you push them. If I ran 37s on 4 or 6" I would just remove the fenders and the bed.
Yeah I gotta watch mine, if I push it really hard crossing ruts in the sand I can watch mine come pretty close to the fenders on compression. I need to drop my bump stops down, or even invest in a nice set of gas bump stops.



2005 F-250 Harley Davidson Edition

Warren 205/75 Injectors
KC Turbo 71mm VGT
Twisted Diesel Level 3 Transmission/PI Converter
AFE Intercooler/Flexalite Fans/Mishimoto Radiator
Icon 4 Link, 37" Nitto's
SSBC 6 piston calipers
Yukon 4.30's, Detroit Locker


Machining the 6.0:
http://www.powerstroke.org/forum/gen...ine-6-0-a.html
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post #9 of 28 Old 03-04-2013, 05:17 PM
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depending on wheel off set you may rub even with the 1" tei spacer. And 37" vs 35" I saw a 1.5 mpg drop when I made the switch but the look it worth it to me for the trade off in mpg!

2013 F150 FX4 EcoBoost fully loaded with the app pkg on Icon 2.5" coilovers
06 F350 Lariat-PMF 8" on 37'sSold
09 F350 ccsb Pmf 7" on 37's Sold
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post #10 of 28 Old 03-04-2013, 05:21 PM
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Also I forgot to mention my 35x12.50's would rub the radius arms occasionally. They were on the stocj Harley 20" rims so no positive offset...or is it negative...anyway they were stock. Maybe I already said this...I seem to remember typing it recently. Oh well.



2005 F-250 Harley Davidson Edition

Warren 205/75 Injectors
KC Turbo 71mm VGT
Twisted Diesel Level 3 Transmission/PI Converter
AFE Intercooler/Flexalite Fans/Mishimoto Radiator
Icon 4 Link, 37" Nitto's
SSBC 6 piston calipers
Yukon 4.30's, Detroit Locker


Machining the 6.0:
http://www.powerstroke.org/forum/gen...ine-6-0-a.html
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