Outer Limits 4x4 Board

35, going on 41 with the new R&P

Hoonz wrote:yeh didn't see ur post up there a bit ...

so mine worked out to be 85.4820816

4.88 crawler gears from marks
4.11 diffs
4.262 1st

prolly minus some for the 35z

how did you get 4.88 fomr marks, they quote there ratio as 3.743:1 on there site?

eh yeh so they are just checked the box ... dunno why i had 4.88 on the mind

Hoonz wrote:eh yeh so they are just checked the box ... dunno why i had 4.88 on the mind

its because that what you want in the diffs, it will be slower again

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

dic factor

spazbot wrote:108:1

g52 - lux duals - 5.29s


how low can you gow

same as mine

but series 3 and 4.88's

112:1

zook 5 speed, 6.1 t-case, 5.12 Vitara diffs

87:1 dual cases and 4.625 gu diffs

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

Because I can
I do agree with you somewhat in the fact that a lot of obsticles need momentum to negotiate witch at 150+ you dont get.

But really with dual cases you can always put just one case in low if you dont to crawl really slow.

The reason mine will be so low is that I allready have the lower gears for one of the transfers (and really like the ratio) so I will chuck them in the rear case and use them probably 90% of the time and when I really need to crawl over something crazy I can lock in the front transfer.

If I didnt allready have the gears I would have just used 2 stock cases and been at around 100 to 1.
Paul.

I'll crawl until she gives in :(

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

What was the 40s crawl at dan?

49:1 in my IIA (lower soon)

3.6:1 IIA Box x 2.88 Suffix B IIA Low x 4.7 Diffs

43:1 in the 110

3.65 LT85 first x 3.32 LT230 Low x 3.54 Diffs

MY45 wrote:

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

What was the 40s crawl at dan?

60:1

And that was plenty to turn the 38s

what's with the massively low ratios?

crawl ratio does not take into account tyre size.

eg on my rig crawl ratio of 102 but i run 36" tyres with a massively underpowered 1.6ltr engine, i need the gearing.

I'm going to 39" tyres and will be looking at duals, gearing can make up fpr lack of power.

47.81

Stage 1 Land Rover Ute - but on Q78s.

Would like about 60ish to one.

Dave.

im about 80 to 1 but im only running 32s crawls real nice
4 speed sierra box s3 rockhoppers 4.11 diffs

Hekta wrote:54
Pajero 2.85 Transfer 4.88 diffs

Me too!

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

This coming from you Mr 'I wanna lower my RC crawlers ratios even though they're perfect now' !!!
Why not ? I doubt there'll be that many times that i'll want double low first gear but you never know, why not build it right the first time ? I believe the pirate guys are running high 100's or low 200's on their trail rigs these days, granted mine isn't a trail rig but meh... i wanna go sloooow !!

Surfection wrote:

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

This coming from you Mr 'I wanna lower my RC crawlers ratios even though they're perfect now' !!!
Why not ? I doubt there'll be that many times that i'll want double low first gear but you never know, why not build it right the first time ? I believe the pirate guys are running high 100's or low 200's on their trail rigs these days, granted mine isn't a trail rig but meh... i wanna go sloooow !!

RC and 1:1 are a little different RC is a one speed gearbox - most 1:1 have 4 or 5 speeds

200 That is just wank factor Give me a situation where 200:1 is useful ?

So if I only have 60:1 I haven't built my rig right the first time ?

Shorty40 wrote:

Surfection wrote:

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

This coming from you Mr 'I wanna lower my RC crawlers ratios even though they're perfect now' !!!
Why not ? I doubt there'll be that many times that i'll want double low first gear but you never know, why not build it right the first time ? I believe the pirate guys are running high 100's or low 200's on their trail rigs these days, granted mine isn't a trail rig but meh... i wanna go sloooow !!

RC and 1:1 are a little different RC is a one speed gearbox - most 1:1 have 4 or 5 speeds

200 That is just wank factor Give me a situation where 200:1 is useful ?

So if I only have 60:1 I haven't built my rig right the first time ?

i have a spot were ur 60:1 and 38's would have u bouncing all over the place. mine at 108:1 on 33's could be lower there.
if u have a super low crawl ratio u can always change up gears but if your at 60:1 u cant change down to lower

meh i would be happy as larry with 60:1

I am happy with my 28:1 just gotta use the brakes

sierrajim wrote: gearing can make up fpr lack of power.

No it cant!

When you dont have enough power you cant get Wheelspeed which a lot of obsticals need. I beleive of all the obsticals i have driven in Competition and in general driving most of them have needed wheelspeed rather than Crawling.


Im at Around 45-1 in my Buggy with an Auto. Most US Buggies are a little better at 50/60-1 with Autos. I do feel at times a little more ratio could help but not that often. The only reason i realy feel it would be an advantage to me is for a little more acceleration down low when trying to Bump up obsticals. Or throttling launches. Not so much for the slow crawling.

redzook wrote:

Shorty40 wrote:

Surfection wrote:

Shorty40 wrote:Whats with the MASSIVE low ratios ? 150+ ?

Whats the point ?

This coming from you Mr 'I wanna lower my RC crawlers ratios even though they're perfect now' !!!
Why not ? I doubt there'll be that many times that i'll want double low first gear but you never know, why not build it right the first time ? I believe the pirate guys are running high 100's or low 200's on their trail rigs these days, granted mine isn't a trail rig but meh... i wanna go sloooow !!

RC and 1:1 are a little different RC is a one speed gearbox - most 1:1 have 4 or 5 speeds

200 That is just wank factor Give me a situation where 200:1 is useful ?

So if I only have 60:1 I haven't built my rig right the first time ?

i have a spot were ur 60:1 and 38's would have u bouncing all over the place. mine at 108:1 on 33's could be lower there.
if u have a super low crawl ratio u can always change up gears but if your at 60:1 u cant change down to lower

I still dont agree.

Its just cause you have a piss weak engine

I never once had an issue with gearing in my 40. Those who wheeled with me will attest to that

Hoonz

Some GQs (Mavs) are 4.556 1st

Bazzle

Yes I've seen the disadvantages of a twin case in a Lux unable to accelerate (in 1st low) at the critical moment down an off camber steep hill and it rolled over.
Anything over 4:1 low range in an auto will pretty much overcome the brakes anyway this has been discussed many times on various US chat forums.
Also gearing will only compensate for a lack of power to a certain point especially for smaller motors.

Gone to be about 118 to 1 zuk 5speed with 6.1s and 5.29 hiace diffs but these have to run 38s with the standard 1.3 zuk motor

this TJ is running 265:1

http://im1.shutterfly.com/procserv/47b4 ... IasWTVu5aE

ruff,

perhaps i should have said "sometimes gearing makes up for lack of horsepower"

eg on my rig in high 4 running 36" tyres on a slight uphill start it boggs down due to lack of power, put it in low and off you go.

I understand your thoughts on your comp buggy needing wheel speed, i too am going to build another rig with more power but as you know horsepower costs $$$.

On the zook gearing was just the more economical option.

sierrajim wrote: perhaps i should have said "sometimes gearing makes up for lack of horsepower"

Nope.. should have said "gearing makes up for a lack of TORQUE"

For example, a torquey 4.2 turbo diesel GQ will be happier with standard ratios than the 4.2 petrol which develops it's torque higher in the rev range. The the petrol needs to rev higher to generate the same torque... so to crawl at the same speed with higher engine revs you need to gear it down.

To get good wheelspeed you need good power ie the engine needs to do a lot of work in a short amount of time (the definition power is work done relative to time).

Torque is the force with which the motor can turn the crankshaft.

Power is the ability of the motor to accelerate against some resistance.

I'm at 80:1 on 38.5's (or 39.5's)...

AX15 (manual) @ 3.83
AtlasII @ 4.3
Diffs @ 4.88

I rarely, if ever, wish I was geared lower. When I switch to an Auto I would like to be a bit higher (Tony's 60:1 suggestion with an auto would be bang on for my liking).

You can always choose a higher gear, that's true... but not in reverse (unless you have dual cases and stop to drop 1 case out every time you reverse).

S.