Tapage
Club 4X4 Panamá
landtank said:
Woou.. I thought isn't posible .. more towing a 3500 lbs camping .. any mod to your engine .. ?
How much Trimming for 315s with 2.5 OME
- Thread starter elhombre
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Woou.. I thought isn't posible .. more towing a 3500 lbs camping .. any mod to your engine .. ?
Tapage said:
No mods to the engine, just kept it in PWR mode and anticipated hills ahead of time with plenty of throttle. My buildup was over 5 years because of funds and I accepted the performance while I saved for the gearing.
elhombre,
Sounds like you are going to use all of your wheel travel.
"The inner rub is unacceptable because the truck will see rock on Elephant Hill and throughout the Maze trails. These trails will cycle the suspension with all my crap, gas on the bumper, and 12 gallons of water and full Ice chest of adult beverages inside."
Might I make a suggestion? Go with a 33-inch tire. I have 35 inch BFG's with slee's six-inch kit and I have a little rubbing. I have found that wheel travel is way more important then tire size. Lowering your bump stops to run a larger tire at the expense of wheel travel is not beneficial. If you ever run any dirt roads or trails at speed you will wish you had the smaller tires and no bumps stop modifications.
"I am aware that bump stops will limit suspension travel but a smooth riding rig without driveshaft problems is more important to me. "
Running all day long slamming into the bump stops gets really old really fast. Just an opinion hope this impute helps.
Tare
Sounds like you are going to use all of your wheel travel.
"The inner rub is unacceptable because the truck will see rock on Elephant Hill and throughout the Maze trails. These trails will cycle the suspension with all my crap, gas on the bumper, and 12 gallons of water and full Ice chest of adult beverages inside."
Might I make a suggestion? Go with a 33-inch tire. I have 35 inch BFG's with slee's six-inch kit and I have a little rubbing. I have found that wheel travel is way more important then tire size. Lowering your bump stops to run a larger tire at the expense of wheel travel is not beneficial. If you ever run any dirt roads or trails at speed you will wish you had the smaller tires and no bumps stop modifications.
"I am aware that bump stops will limit suspension travel but a smooth riding rig without driveshaft problems is more important to me. "
Running all day long slamming into the bump stops gets really old really fast. Just an opinion hope this impute helps.
Tare
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Newps said:
Well, if he puts 2" bump stops on and L shocks, he'll have just as much wheel travel as you do with Slee's 6" kit. It just is he'll have much closer to a stock amount of compression travel, and more extension travel, where Slee's 6" kit has more compression travel and less extension travel. Same thing comparing Slee's 4" to 6".
Slomo
It's Complicated
A very true statement. I think the type of driving off road he generally does would make all the difference. If he is into moderate to high speed stuff the extra up travel would be more beneficial than the down travel. Conversely if he is into slow rock crawling the extra down travel with the ability to run 315's by sacraficing 2" of up travel would be the better way to go. Assuming that the performance loss caused by stock gears and 315's is acceptable.
slomo said:
I've never built a pre-runner or dessert race or short course truck, but I would consider all of those high speed stuff. Most the ones I see are set-up with alot more down travel than up. Just an observation. And the higher the speed, the closer to stock height I'd rather be.
Overall it's somewhat interesting that people are trying to shove larger tires on lower lift. I remember one of the rags did that with a power wagon and alot of sawzall. Something like 40" with 4" lift? The low center of gravity certainly has it's advantages. Every now and again I re-read Slee's site for bits of info. and persepective. This I found interesting - from his Lift Size vs Tire Size - revised on 16 july 2003
"4. Joe Blow says I can run 315's (or 35's) with just the J springs. Is that true?
As mentioned earlier, there are many variables, and for some the answer to this might be yes. However, Slee feels that the only way to clear 35" tires is about a 5" lift. Anything less is a compromise."
I don't think it's necessarily wrong given the time, I think people are just more willing to push a little further now. I remember when I thought the 10" and 12" travel Dostech's in the Downey catalog were just the longest travel ever, now I have 14" on my 40 and use every bit of it.
Slomo
It's Complicated
Good point. I mispoke, I meant moderate speed stuff and should not have lumped them together. Realistcally that is the most an 80 would see. All of the high speed type of vehicles you mentioned do have more down travel than up travel. They also have hydraulic bump stops and highly tunable shocks to handle the impact of high speed compresion as the vehicle hits an obstacle. The extra down travel helps keep the tires in contact with the ground for better control and traction to go faster yet.
The average 80 will not handle the uptravel nearly as well and will bottom out and rebound excessively if set up with minimal up travel and more down travel. I meant that an 80 driven at moderate speeds would do better with a more balanced up/down travel suspension. Assuming the amount of travel is consistent and the static ride height within that range of tavel is the only variable.
I agree with you, the higher the speed the closer to stock height I would rathere be.
Christo's site has allot of good information and I often go and re-read it myself when I start thinking about fitting 315's, again.
dont do it in a area with snow I ran 295's on my 100 series and snow would pack up in the fenders and make it hard to turn. I think you need moore room. dont even try chains either
315s fit with stock worn out springs and shocks....
Not all 315's are the same, and tread width varies quite a bit.
Results may vary.
Results may vary.
jfz80
Cruisin’
Here are 315 nittos on a 2.5'' lift (not the best pic) and then 315 bfg at's on a J lift.
bfg's only rub (inner rear wheel well) b/c they are on the tundra rims(17'') which have less backspacing. Go play w/ the tire calculator on discount tires website to see the difference b/w brands and sizes. hell the irok 36'' are only 6/100's of an inch smaller than the 37'' and 315's on a 16'' rim are different than 315's on a 17'' rim even w/ same mfg.
but to answer your question w/out full experience but by collective mud knowledge, id so no trimming even w/ various brands unless you are laden w/ armor and gear. you might want to remove the flares before they get removed for you. Besides the tire will show you where you rub and may do some of the work for you
.... CJ should be able to get you a better pic of the 315's on 2.5 when he shows up.
bfg's only rub (inner rear wheel well) b/c they are on the tundra rims(17'') which have less backspacing. Go play w/ the tire calculator on discount tires website to see the difference b/w brands and sizes. hell the irok 36'' are only 6/100's of an inch smaller than the 37'' and 315's on a 16'' rim are different than 315's on a 17'' rim even w/ same mfg.
but to answer your question w/out full experience but by collective mud knowledge, id so no trimming even w/ various brands unless you are laden w/ armor and gear. you might want to remove the flares before they get removed for you. Besides the tire will show you where you rub and may do some of the work for you
.... CJ should be able to get you a better pic of the 315's on 2.5 when he shows up.
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Just curious: why not split the difference between 4.10 and 4.88 and just run 4.56?
jfz80
Cruisin’
my thoughts are if your gonna go.....GO BIG. At the point we are running 35's and regearing are you still uber worried about gas mileage? someone had a great chart up about gears/speeds/rpms. I dont think youll be too high in the rpms if you go 4.88, unless you are swapping b/w mud and street(smaller size) tires.
nice, can you send more pics of your truck so i can see it w/o the flares...?
thanks
thanks
jfz80
Cruisin’
who are you referencing, me? I opted to keep the flares. First pic in my post above has 315's on 2.5'' w/out flares on my roomates 80. This pic shows the point where the tire rubs on the inside of the wheel well 3/4 inch before it meets the bumpstop. usps tire is 23'' off ground.
