Shotts' 100-series (Roklimo) Step-by-Step 5-year buildup

ShottsCruisers

Explorer
OK....with my 100 being basically "completed" I continually tried to imagine what other changes could be made to improve off-road performance. One thought that kept naggin' at me was:

"OK, why do they have long-travel L-shocks for the 80-series and not for the 100?"

The answer in the front is obvious! IFS! Travel could not be improved by just adding a long shock (without wrecking something else).

"What about the rear though?" "The rear suspension is very similar in the 80" "I have L-shocks with 863 springs on my 80-series...why can't I slap them on my 100?"

The answers I got over and over to the above questions was "they don't fit". When I'd ask why I'd also get the following:

"The parts fit differently, plus it's a different truck"
"On an 80 the L-shocks were made for taller springs than the 863"
"Why do you want them?" "What will you gain?"
"Nobody is running this setup"

I would him-and-haw at the answers, though every trip out in the 100 this topic kept nagging at me. "If the 863 and N74 L-shock work so well on my 80-series, why can they not work on my 100?"

Finally, Mr. Slee had some extra time after I pushed him pretty hard to tell me "what it would take to put the L-shock on the 100 so I could try the setup out" and he came through. Here's the details:

"For John. N74L vs N101

--------------------------------------------------------------------------------

John, the N74L should work by swapping some of the bushings.

Measurements:

N74L compressed vs N101 = 1" longer
N74L extended vs N101 = 2.6" longer

The bottom bushing ID is 19mm but on the N101 the width is 45mm and the N74L is 40mm. So you would need to use the N101 bottom bushing.

The top pin is 17mm on the N101 and 14mm on the N74L. The index washer lip is 26mm on the N101 and 22mm on the N74L.

So on the top you need to use the N101's washers and hardware, but you need to use the poly bushings from the N74L.

So there you go, send the check."


FINALLY....I HAD A SOLUTION! I had the parts...because I had 100 shocks. I "sent the check" and ordered a pair of N74L shocks. On they went in an hour.

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ShottsCruisers

Explorer
CONTINUED:

We took the thing out to a very familair nearby play area we always hang at. We tried it on a hill where we always lifted wheels in the deep holes. We were SO EXCITED....the wheels swallowed the holes right up and this thing felt like it was my 80 out there. Here's my first two pics:

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Slee mentioned to me that I might want to retain the 863 spring being that it was shorter than the L-shocks usually get matched up with. My 80's 863 spring/N74L shock setup was not retained and in 3-years I have never lost one. Knowing though that the 100 is a different vehicle and this experiment had not been tried yet, I took his advice and retained them. Here's the before shot and one of the retainer:

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At this point our install was complete. It was quick tested. After 5 minutes we were amazed at the improvement. So how would it do on real word trails? FANTASTIC!

The following Saturday we went to Chiva Falls. It's a trail I've run with every suspension setup I've had. A better test didn't exist for me. Here's my observations from this first trip:

WOW! THIS THIS FEELS LIKE MY 80-SERIES! It flexes!
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OK....what about that one really twisted spot where I used to WHEEL LIFT?
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Man! The thing felt like the front compressed better. Possibly because the rear stayed up higher away from the ground due to the added droop/travel. ???

Just compare to my other picture here. Note that some of the difference in this comparison is due to the fact I had also added the rear bumper which balanced the weight, though most is from the shock change no doubt.
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OK...WHAT ABOUT THE BIG N74L DEBATE ON IH8MUD?

There's been intense debate about the beneifts of this modification. It's easy to visualy confuse the travel debate in one's mind. I'll try to explain why this made such a difference ON MY 100. Before we start, everyone does agrees that the N74L shock has 2.6" more travel than the N101. Please keep that in mind. :)

My personal truck:
N101 shock - 2" bump stop reduction (to stop the rubbing) = N101 - 2" travel
Using N101 as "x", the equation is:
x - 2 = -2 (in other words I was down 2" travel from a "normal" N101 install)

OK....Keeping EVERYTHING THE SAME and add in 2.6" more travel that the N74L offers (down, up, whatever...it's travel).....so what is "everything the same" plus 2.6? IT'S 2.6" MORE TRAVEL THAN BEFORE! Follow me?

Now, to look at this another way (which is NOT my scenario and here's where some have targeted me incorrectly):

N101 travel = N101 travel (The typical 100-series setup)
N74L travel - 2" bumpstop reduction (my setup) = +2.6 - 2 = 0.6 increase.

In other words if you compare MY 100 setup with bumpstopped N74L's to a everyday lifter 100 with N101 and without bumpstop reduction (lots of rubbing) then my 100 only gains 0.6" over the norm which isn't much. That I agree with . The trouble is that the 35's rub too much without lowered bumpstops.

Now....the ideal travel setup....N74L and 33-inch tires! With 33's you don't need to lower your stops to eliminate rubbing, however you do need to lower them by 0.5" to protect the shock. With this outfit the math is easy. Compared to N101:

N74L adds 2.6" travel less the 0.5" for the required bump stop lowering. This nets the user an increase of 2.1" travel over the typical N101 setup. That's a great advantage! One would have to opt for this setup would they not? Yes!

BOTTOM LINE: Regardless of critics, measuments, numbers, and the like, this swap change TRANSFORMED my 100 out on the trails. It's MUCH more stable, remains level, articulates, and handles MUCH better than it did with the N101 100-shocks. There is NO WAY I would EVER go back to the N101! It takes ONE TRIP to compare the setups. Trust me...the N74L is the ONLY way to go if you have the taller spring to match (863/864 by themselves or 865/866 w'20mm trim packs atop).

I have travelled on trips with other lifted 100's. On each trip the other drivers could see that my 100 just flexed better and was more stable. I'm no physicist, but I am the owner of this fine vehicle that I've driven on so many trips and with different suspensions. It's not rocket science to tell the difference this made off the pavement. My challenge for those who are considering this shock option: Don't listen to the forum folks who have never even tried it! They are wrong. Dead wrong. There is a difference! The longer L-shock is used 24/7 on the 80-series. It works on the 100-series too!
 

ShottsCruisers

Explorer
CONTINUED:

Here's more pictures of the 100 since the N74L upgrade:
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COMMENTS:

*There is no more travel to be added on the rear with 35's and an aftermarket bumper. I am at the limit now! At full compression the rear tire will just touch the Slee bumper. Any more and there'd be trouble.
*Because of the above situation you would have to lower those rear stops the 2" like I did if you run the 35" tires. If not, the tire and Slee bumper would stop progress.
*If you don't mind rubbing the 35's and wanted more travel, you could lessen the bump stop reduction though you'd not be able to have an aftermarket bumper. This scenario I have not tested....it might be OK with a stock bumper, though you might need to cut it some. I think this scenario would push you into territory where negatives come into play?

DO THIS MOD!

More N74L flex action shotts:

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ShottsCruisers

Explorer
OH! HERE'S ANOTHER BEFORE AND AFTER COMPARISON:

This is as far up this rock that I could get before lifting a rear wheel. Compare it to the same rock with N74L on the second picture. AMAZING!

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OK...on to more action shotts:

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ShottsCruisers

Explorer
And in conclusion....pictures from the left side of the Three Feathers obstacle on the Chiva Falls Trail. I started up this a few times in the past. the 100 began lifting wheels EARLY. I always backed down. With the added travel and stability I went for it. There was not a slip on the climb though I was so off-camber it was my slider that kept me from sliding over on the climb. Thank God for sliders.


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ShottsCruisers

Explorer
SO WHAT'S LEFT?

Here's a few minor wants:

*LED interior lamps
*Tires that will never get chewed up from running trails. :D
*A new steering wheel that's not chewed up

Here's my major wants:

*None....really. Equipped as is I think this truck is the best combination of all talents in one package. In my opinion it exceeds even the 80-series vehicles overall.

What would I like to see happen though I do not need:

*4.88 gearset (not worth the cost of upgrade to me)
*Longer traveling front suspension
*Taller suspension lift (4-6") which would compensate for the truck's extended bumpers.
 

jeffryscott

2006 Rally Course Champion: Expedition Trophy
Wow John, what a great writeup. Thanks for sharing. I learned so much from reading it - so much of it applies to my 4Runner build (certainly not specifics, but concepts). I've always admired your trucks, now I see what has gone into them.

Let's go wheeling soon ...

Jeff
 

Clutch

<---Pass
Is anyone else wondering what John does for a living?

I am lucky enough to do my suspension once...how many times did you build it up and tear it down?....then to build it back up?

Great write up!
 

calamaridog

Expedition Leader
Thanks for putting this all in one place John. Makes it easy to reference when it's all in one place.

I can attest to the fact that his truck works well on the trail:)
 

ShottsCruisers

Explorer
Thanks guys. I figured this would be a good way to answer back all the PM's I get. :)

Some may want to build their truck one way or another. I have a lot of the various ways shown in the thread. My hope is that it makes it easier for some folks to choose the setup that's best for them.
 

p1michaud

Expedition Leader
Lessons learned

John,
Excellent write up, I really enjoy reading how you progressed to where you are today. The lessons you have learned along the way, and the advice. I sure wish that Expo was arroud before I started modding the Tacoma. I would have saved some $$$ and effort by doing it once and doing it correctly.
This is a great reference for others who wish to modify an 100 series.
Cheers :beer:,
P
 

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