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Author Topic: 2005 LJ Rubicon Revival  (Read 12145 times)

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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #45 on: May 10, 2018, 09:00:55 PM »
well the engine should be done here by the end of the month.....


anyone interested in helping with an engine swap?

Offline Graveltravels

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Re: 2005 LJ Rubicon Revival
« Reply #46 on: May 13, 2018, 03:31:11 PM »
If I was down that way, and not in the middle of my own mess, I'd come give a hand.


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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #47 on: February 05, 2020, 06:53:09 PM »
Well..... Its been forever since i've had an opportunity to post about my build.


After install and initial start up the engine had a tapping sound. Initially we fiured it was the rockers hitting the cover so i bought an aluminum cover. This didnt fix the tapping.... then we machined releifs into the valve cover... didnt help...

we dropped the pan just to see if anything was obviously wrong. found that Cyl 1 piston was able to rock within the cylinder on its own. very un-cool.

this was pretty much a year ago and its been a cluster fk getting things sorted. i'm now ditching the blower idea, staying N/A and going to 10.5:1 CR with new pistons. The bad cylinder only needed a hone job so only one new piston was needed.... but you try getting a single piston from a manufacturer. so now i'm committing to replacing all 6 pistons just to get this pig rolling.


oh and on top of it all christmas day my wheels and tires were solen off my rig while it was parked at the shop...... wooooooo.


i just want to go wheeling.

Offline Vinman

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Re: 2005 LJ Rubicon Revival
« Reply #48 on: February 05, 2020, 07:12:13 PM »
Glad to see it’s finally getting sorted out and it sucks to hear about losing the tires and rims.
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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #49 on: February 06, 2020, 06:37:47 PM »
With the whole wheel and tire theft i'm debating on going with 35's or 37's...... i know eventually i'll need to truss and tube the axles to support 37's. but is there reason to step down to 35's till axle reinforcement is done.

I'd also like to run Yokohama X-MT's but not sure if those are too aggressive. Thoughts?

for wheels i'm going to use hutchinson rock monsters. do it once and do it right.

Offline hps4evr

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Re: 2005 LJ Rubicon Revival
« Reply #50 on: February 06, 2020, 07:23:23 PM »
With the whole wheel and tire theft i'm debating on going with 35's or 37's...... i know eventually i'll need to truss and tube the axles to support 37's. but is there reason to step down to 35's till axle reinforcement is done.

I'd also like to run Yokohama X-MT's but not sure if those are too aggressive. Thoughts?

for wheels i'm going to use hutchinson rock monsters. do it once and do it right.

X-MT ‘s are perfect!
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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #51 on: February 06, 2020, 08:54:34 PM »
X-MT ‘s are perfect!

37 X-MT's it is!!!! now to see how long it takes to get them.

Offline Immortal

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Re: 2005 LJ Rubicon Revival
« Reply #52 on: February 07, 2020, 08:55:13 PM »
The Rock Monsters are great. Really easy to remove the hub caps though. I think I have half of one left.
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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #53 on: March 04, 2020, 08:49:05 PM »
lets see what kind of feed back i can get.

I did some digging around and came to the conclusion that my dynamic compression ratio with a static of 11.25:1 is comparable to a 9.35:1 static with 3-4psi boost. That means with the Edelbrock aluminum head I should be able to get away with medium grade fuel. Below are my numbers and if i'm on the right track and i'm safe with a 0.0285" quench.


9.446" Deck Height
3.910" Bore
3.895" SCAT Crank
6.125" SCAT Rods
0.040" cosmetics MLS gasket (3.950" bore)
1.385" Piston CD
Comp 235 cam (IVC 54 ABDC)

Piston is 0.0115" above Deck
Quench 0.0285"

14cc dish - SCR = 11.25:1 DCR 8.99:1
31cc dish - SCR = 9.35:1 DCR (w/ 3psi) 8.89:1

Offline hps4evr

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Re: 2005 LJ Rubicon Revival
« Reply #54 on: March 04, 2020, 10:21:48 PM »
I wouldn’t be afraid to run 91 octane. It’s costs a little more but if you don’t drive it everyday then you may as well have the most power out of it and enjoy driving it every single time.
Especially when you’re running 37’s! Lol
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Offline duck454ss

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Re: 2005 LJ Rubicon Revival
« Reply #55 on: March 04, 2020, 10:38:35 PM »
I wouldn’t be afraid to run 91 octane. It’s costs a little more but if you don’t drive it everyday then you may as well have the most power out of it and enjoy driving it every single time.
Especially when you’re running 37’s! Lol


not so much worried about what fuel to run as is 11.25:1 going off the deep end. running premium fuel just means i pack some octane boost if i'm going into areas where i can only get 87.