Project: Turn-Key Idiot Machine

[clean4drxj]

Looks great!, those are some nice welds

[DizzDizz]

Zullo if you need flat steel and such let me know i have a very good conection.

Def looks very nice man im gonna have to grab an 18 pack and come check it out one night.

[AngryTJ]

This things going to be a beast! Keep at it man Im not much of a mechanic or body man but can certainly be a helping hand if you need one. Let me know

[Zullock Holmes]

So i got a bunch done because the weather has been so nice.

But, I started on my motor build and wanted to throw the details into here.

Basically, my engine goal isn't to make as much power as possible, but rather to be able to run well and reliably at high rpm's. My goal with this buggy is to be able to run the RCrocs Race series. In a racing situation and with the gearing this truck will have (no overdrive) 65 mph will happen at around 5500 rpm. So it is crucial to make the engine reliable up to 6000 rpm, something i believe to be completely capable.

I understand that this truck will be underpowered compared to most ultra4 rigs; but i do not have the money nor the means to be competitive in that series. That being said, i think that with the lack of long straightaways in the RC race's and the plethora of turns, this motor setup can be made to work. Designing the car and suspension to be able to corner well at speed and have enough torque to pick up out of the corners i feel is very important. If the only thing i need to be a modified class rig is a mechanical steering setup (which is the only thing keeping this thing in unlimited rules class) i will be seriously looking into changing from the original plan of using a full hydro setup. We will see, i'm kind of hoping we see a rules change there before i get to that point, which is coming pretty soon. so fingers crossed.

Anyways, here's the guts:

(Good link for anyone doing a 4.0L rebuild)
http://www.perfectengine.com/Jeep_4_...th-rcj242c.htm

pistons and rings for up to .040 over bore; rod, crank, and cam bearings; timing set; oil pump; freeze plug and gasket sets for $350

basically what's going into the motor w/ prices:
Roller rockers, studs, guideplates through summit- $395 retail
the rebuild kit i posted above- $350
Crane dual valve springs w/ retainers- $140
10722 Intake valves- $84
10721 Exhaust valves- $84
Comp cam and lifters- $190

Alitte over a $1200 on parts

throw in $250 for the machining on the head.

And it boils out to a pretty stoutly built 4.0L for only about $1500 on internals.

I plan on making my own valve cover, oil pan, and exhaust manifold.

The stock oil pan is a shitty design, the sump is so low towards the back of the motor it actually had a significant effect on how low i could mount the motor on chassis. So to get that weight as low as possible, i'm essentially going to build a shallower pan that extends farther forward to actually gain a quart of oil capacity and be able to lower the motor 2 inches in the chassis.

I'll be posting pictures as the engine build progresses and i have some from the chassis progress to update on, so that'll come soon. I hope that detailing my engine build through all the steps can serve as a good tech reference as well

[justtorchit]

ya know, i was down in milford yesterday and was thinking about trying to give ya a call to bullshit and check out how this thing was coming. good to see its coming along

[Zullock Holmes]

Ohhh man!! you shoulda hit me up, i was at work during the day but i'm on break from school this week so i was home early.

I always have a stock of beer out back there

[Buffalo Phil]

[Hydra]

Look at all the productivity

[Pedro]

are you still drinking oktoberfest?

[Hydra]

are you still drinking oktoberfest?

Looks like either Boston Lager, Ale, or Cherry Wheat

[Zullock Holmes]

Cherry Wheat, i'm addicted to it.

Thanks for posting the pic phil, i took some with my camera but i bent a and b pillars today after work, so i was gonna update this weekend.

[HeavyMetal]

so

[HeavyMetal]

many

[HeavyMetal]

nuggets

[Zullock Holmes]

shit'll be done. don't you fret.