[Damo]

One thing I can't find much mention of when it comes to RUF is how does it affect ride height?

For example take my current vehicle. It has a set of 2" Kings leaves in it. They are getting on a bit and i've removed a leaf, so they might be good for 1" lift over stock. I also have some stock rear leaves on hand. I was hoping that fitting stock rear leaves in the front gives it enough lift to match the lifted rear springs.

To those guys that have done RUF, what have you found?

[31zook]

I did a RUF both chassis extension, and longer shackles and re-drilling, both with the same set of rear springs.

When i did it with longer shackles and re-dirilling the hanger it came up even in the rear with 50mm lift rockcrawler sprngs. This is RUF, 50mm body lift, and 33s


This is about 30-50mm chassis extension(was a while ago), same front springs as above, and stock rears.


From my experiences, chassis extension with stock shackles will get you no flex, but longer shackles and re-drilling will equal zero lift.

[Damo]

So what springs did you use in the front and what in the rear?

[31zook]

I used stock sierra rears in the front of both. 50mm lift springs on the swb, and stock rears in the rear of the lwb

[JrZook]

Hey Damo,

Go measure the difference in chassie to ground heights between the front and rear of the sierra. You will find that the front of the sierra with the same camber/length/rate springs as the rear will sit higher by ~25-50mm (you will have to measure)

[ajsr]

JrZook wrote:

Hey Damo,

Go measure the difference in chassie to ground heights between the front and rear of the sierra. You will find that the front of the sierra with the same camber/length/rate springs as the rear will sit higher by ~25-50mm (you will have to measure)

very true
but something else to consider is the fact you can change the ride height by changing shackle angles , lenght and hanger mounting point , also number of leafs in the pack, so its all a setup type thing

[Hybrid]

Damo,

My RUF with stock shackles runs 40mm OME rears all round whereas others always seem to talk of running lifted rears and stock height front. As AJ said it comes down to setup.

[mcwilly]

Just coil it. If your goin to the effort of extending chassis.

[JrZook]

mcwilly wrote:

Just coil it. If your goin to the effort of extending chassis.

Ha! Extending the chassis and RUF lets say a weekend worth of work if that. How long would it take to coil properly?..................................

[Damo]

ajsr wrote:

JrZook wrote:

Hey Damo,

Go measure the difference in chassie to ground heights between the front and rear of the sierra. You will find that the front of the sierra with the same camber/length/rate springs as the rear will sit higher by ~25-50mm (you will have to measure)

very true
but something else to consider is the fact you can change the ride height by changing shackle angles , lenght and hanger mounting point , also number of leafs in the pack, so its all a setup type thing

Oops, I should have mentioned that I want to run the stock shackles. I know that will reduce the droop but i'm happy to trade some droop for better onroad manners.

[Moph]

All depends on how you do it. These are the closest comparative photos I have for mine - top is pre-RUF on 235/75R15's ... bottom is post-RUF on 31x10.5's. There obviously is a bit of lift in there, but I don't reckon it'd be more than say 2.5" all up between the two photos (1.25" larger tyre radius + maybe 1" clearance increase from tyre to guard).

Oh - 2" BL in both photos too.

Note that the 2" OME's on the rear have since shagged out and I need to put on +50mm shackles to match the front.

BEFORE RUF: Stock springs, stock shackles, 235/75R15's (28.6")


AFTER RUF: 2" OME's rear, stock rears up front, +50mm shackles front, stock shackles rear, 31x10.5's

[Hybrid]

Moph wrote:

BEFORE RUF: Stock springs, stock shackles, 235/75R15's (28.6")

Are the dogs in the photo a RUF joke?

[Damo]

Hybrid wrote:

Are the dogs in the photo a RUF joke?

Don't give up your day job mate

[2stroker]

Morph, it is hard to see in the photo but it looks like your front mount has not been moved.

[Moph]

2stroker wrote:

Morph, it is hard to see in the photo but it looks like your front mount has not been moved.

You're correct - it hasn't. I did move the fixed hanger mount position slightly to get the eye to eye length that I wanted on the front. The new rear spring eye location is about 15mm lower than stock (for a tad more lift on the front) and 38mm rearwards of the stock location (to suit the longer rear springs).

The rear springs I used up front were 1015 e/e while the original fronts were 940 e/e, so an increase in overall length of 75mm. Moving the fixed hanger back took up half of this, and the extended shackles on the front accounted for the other half.

[rick1970]

My LWB uses 40mm OME rear springs with a leaf taken out for the rear with stock length shackles. Front is LJ rear main leaf with an assortment of Sierra leaves (5 total) in the front. Stock rear mount position and front hanger relocated around 30mm forward, 90mm shackles.
Front shackle angle is somewhat less than 45' and i intend to make another set of shackles a tad longer or maybe shift the front mount a bit more forward.
Front end is a tad to soft onroad and bar the Sierra lean, sits more or less level front-to-rear

[KEENSY85]

I'm planning on doing ruf and I kbow q bloke that has done it allready,his brother did it the same way they.used king springs the code was Suzuki.006. And they used the same springs in the front as the rear and have a flush level ride height once they get them out of the shed get some pics

[Gwagensteve]

Keensy, the key to ride height with RUF isn't the springs as much as shackle length and position. Generally, with the same pack front and rear the front will sit high. You haven't supplied any information about the length of the chassis extension, bumpstop spacing or shackle length, so its pretty hard to use that information to assist setup.

Steve.

[KEENSY85]

He extended front mounting point out 35mm,iv txt him to see if he redrilled his spring pack or moved the rear mount back as well,

[KEENSY85]

The bumpstop location I'm sure u could work out last once u have done it u should be able to see were the diff ends up

[Gwagensteve]

KEENSY85 wrote:

The bumpstop location I'm sure u could work out last once u have done it u should be able to see were the diff ends up

Nope. I didn't say location, I said spacing. The height of the bumpstop has a huge bearing on chassis extension length and shackle angle/length, so much so that bumpstop height is the first thing that needs to be set, everything else is dependant on it.

On the cars I've built bumpstop spacing has been an important part of clearing the tyres we want to run. Once the bumpstop height is set then a main leaf can go in and the extension length and shackle length can be set.

If bumpstop spacing is added after the car has been setup you'll loose a significant amount of droop.

Steve.

[KEENSY85]

Ok point taken just trying to help .let me know how u go iv never heard anything like that I thought bump stop was just a bump stop to stop the diff colliding with the chassis and as far as I can work out it doesn't affect the pinion angle or caster so keep me posted how u go ,I'm going to Do the same conversion so it will be good to get as much info as possible

[Gwagensteve]

KEENSY85 wrote:

Ok point taken just trying to help .let me know how u go iv never heard anything like that I thought bump stop was just a bump stop to stop the diff colliding with the chassis and as far as I can work out it doesn't affect the pinion angle or caster so keep me posted how u go ,I'm going to Do the same conversion so it will be good to get as much info as possible

Let me know how you go? I've been building cars this way for many, many years.

Bumpstops have nothing to do with pinion angle or caster. The bumpstops might stop the diff colliding with the chassis, but also might stop the tyre colliding with the guards, or the shocks bottoming out.

Bumpstop height has a bearing on shackle angle because as you lower the bumpstop you reduce compression travel, so the shackle angle can be setup flatter, which will improve droop.

Steve.

[KEENSY85]

Look I didn't meen it sarcastically u tool I ment it out of humility and respect do u know something I don't so. Let me know how u go ,what how u end up doing it ,get head out of the sand and chill out,far out u for a walk on egg shells in a forum

[KEENSY85]

I meen far out u have to walk on egg shells in a suzi forum(shit phone)

[Gwagensteve]

Sorry, I've obviously completely misunderstood you. It seems like you were suggesting I hadn't completed a RUF and that once I'd worked it out, I could "let you know how I go"

I had a laugh at that because I've built quite a few cars RUF and I that's why I was able to give you the benefit of my experience, but as you've weighed in with the completely unnecessary name calling you can do a search and work it out for yourself. There's masses of RUF information on this board. knock yourself out.

Steve.

[KEENSY85]

Look I don't really care,u jumped the gun not me I dont mind looking elsewhere for info. ,I'm sorry to say this but if that's the way u conduct ur self,u having nothing I want learn .u tool I thought was a good name considering ur conduct as I ment no harm but u didn't mind mouthing off also if that's how u normely act ur lucky I only called u a tool.

[KEENSY85]

so I'm sorry for calling u a tool but u pissed me off many people know many dif things I'm happy to leave it that .its up to u if accept my apology.

[SierraDan]

[31zook]

KEENSY85 Welcome to gwagon.

If you have specific questions, repost them in your next post and a few OGs can help out.