county cowboy

Ight been looking into building a tube buggy mabe with somthin like a sniper or poison spider frame but my qustion is should i drop a 12 valve 5.9 cummins ?

my ponders are when i role over is that gona hert the cummins ? steep inclines gona hert the motor ? hard hits on the trails ?

bad stuf i have is its heavy , large exaust , and its pretty big .

good stuff , i have only seen a few with a cummins , lots of power , would sound great .

so what are yaws opition on this matter any pros and cons ? any one done did this thats on here ?

or should i drop a hemi ? wich will prob cost much more + it will have a comp. wich im not a fan of.

thanks , nathan

D1EZEL

4bt...............

t-boe

Second that.

JPR Ram

I think the Cummins would be killer, but it is big and heavy. Maybe the Hemi would be a better choice for a rock buggy. But then maybe not........

county cowboy

with a 4bt ? how much power can i push from it ? the buggy will have 2 1/2 ton rock wells and eather 44' or 49 '' tires .

Rednecktastic

It's a 5.9 with 2 cyl cut off. Used in lighter equipment like backhoes and some skeed steers. Use your imagination . I think they make 99+ horse power N/A.... Correct me if i'm wrong.

t-boe

Rockwells have a 6.72 gear ratio and 4bt's can be turned up pretty good. Not sure how much, but with that ratio and a torquey little 4 banger I think it would be just right.

Need95-00CTD

Its not HP your after, its Tq...With Rockwells your looking at like a 7.62 ratio, plenty to crawl with. You'll also probably run something like an Atlas II, or maybe a Stak 4x4 T-Case, so you'll have plenty of gearing. Also, keep in mind, more than a few 4BT's came with P-Pumps, so they can be tweaked easily, and can make a lot of power.

Its also a lot lighter and compact, so fitting in the truck will be a lot easier, and you'll keep your center of gravity lower...Big plusses in a rock buggy.

6speedcowboy

I'd go with the Cummins. I was watching a rock crawling video and there was a guy that had a Jeep CJ with a 5.9 Cummins and it and a hood stack and it just about idled over the rocks. A 4BT would be cool too. I've seen a few around where I live and they are pretty cool

dieselJon

About 120-150 hp stock on a 4bt. You can get about 400hp outta one with a p-pump.

Go with a 4bt.

county cowboy

what do yaw think about the role over factor ? usualy when we role a v8 or a stright 6 we will take the spark plugs out and blow them out .

swmnkdinthervr

What would you have to worry about...oil in the chambers after a roll over...no problem, we burn oil...

Need95-00CTD

Well...remember with a diesel you have keystone rings, so as long as the motor is running you won't get hardly any oil in the cylinder, unlike a gasser. There's one plus, the biggest downfall I can see is that your turbo's oil return line could fill with oil, possibly contaminating it with dirty oil, but I don't think its a big deal. No Carb to spill fuel from, also makes it a lot safer.

I can't see any reason why it would be worse than a gasser, but a few reasons it'll be better. I'm sure a few other guys will chime in.

bullfrog5.9

ya 4bt would be good lots of power and it lighter to 6 i think way to heavy for the tube

county cowboy

im not worried about burning the oil . depends on how much oil passes thru the rings . i dont want it to be to the point that when i turn the motor over that is has so much oil in the cyl that it compresses and cause damage

well im pretty set to go with a 4 bt cummins found a few on ebay .

any one have any leads for a 4 bt ?