|
|
Post by toyman on Dec 27, 2005 11:29:50 GMT -5
I have a 1992 toyota extra-cab 3.0 AT IFS with a 4" trailmaster lift, 2" add-a-leaf, and torsion bars cranked 1-1/4' to 1.5", and a 3" body. Also with factory 4.56 gears. I ran 36x12.50 TSLs for a long time. Around town and offoad alot. Then I got a job thats 40miles one way, and I work 5 days a week. I put some used 33" bfg ats to get by with. I took the cake for a while, but now im turning it into a better gas hog.lol.(cause I am building a strickly offroad rig now) I am taking off the 3" body and get some kind of 31x10.50 AT tire. Anyways, I have identical front and rear chunks/axles.(off my junker/build project) that are 4.10's. Would it help my gas enof to hassle with switching from 4.56s to 4.10s? Running 31x10.50's?  |
|
|
|
Post by MattBC on Dec 27, 2005 13:03:44 GMT -5
on the highway it would probably help (wouldnt help your clutch though  ) I went from 31" on 4.56 gears to 32" on 4.56 gears and it made highway mileage better. Running 31's on 410 gears is almost the same ratio . I am running the 3l an you want to make sure you dont drop the rpm much more as my ratio does or esle the motor may not pull enough in 5th gear. Matt |
|
|
|
Post by toyman on Dec 27, 2005 14:10:39 GMT -5
So would I be better to just run 32x11.50s with the 4.56's? Instead of going through the trouble of swaping in 4.10s?
Oh yeah, the post above states that its a Automatic Tranny.AT lol
|
|
|
|
Post by toyman on Dec 27, 2005 14:35:02 GMT -5
By the way the chart looked i was closest to better gas mileage with 31" and 4.10s. If I read it right, cause I havent messed with gears that much.
|
|
|
|
Post by 4xfreak on Jan 1, 2006 3:12:54 GMT -5
Good "rule of thumb" calculation is to mutiply .12 by your tire diameter.
(.12 X 38" = 4.56)
According to Interco (makers of Super Swampers)
|
|
|
|
Post by 4xfreak on Jan 1, 2006 3:46:40 GMT -5
I run 31" w/ 4.10's and mileage is about 18 per gallon. But I also have 250k on the engine. I would reccomend going with this ratio for your best mileage possibiity.
|
|
|
|
Post by 94cnytoy on Jan 1, 2006 10:50:26 GMT -5
"Good "rule of thumb" calculation is to mutiply .12 by your tire diameter"
No. That's not a good rule for 4's and 6's.
That "rule" applies to v-8's.
You'd realistically have 4:56 for 32 or 33's with a 4 or 6 cyl.
The 4:10 and 31's would be fine. Optimum would be 30x9.5x15 with 4:10. Very little power loss. With your Auto tranny, you'd never notice.
Stew
|
|
|
|
Post by fourwd1 on Jan 3, 2006 8:01:48 GMT -5
Good "rule of thumb" calculation is to mutiply .12 by your tire diameter. (.12 X 38" = 4.56) According to Interco (makers of Super Swampers) Yeah, that's not for a 4 cyl. With a 4 cyl and 38's you'd need 5.71 gears. |
|
|
|
Post by Hoodlum on Jan 5, 2006 16:53:59 GMT -5
So for for 4cyl maybe .15 x's tire size it comes out to 5.70
|
|
)
