actually thinking about it doesn't the 4.0 produce more power as well?
I wonder if there's a medical term for fear of a "proper" yank built V8?
don't think theres anything wrong with putting a rover v8 in a jeep, but it does feel wrong when there are so many yank options available, as said if AMC is not an option then Chevy 350 has got to be the next best thing.this to me is not to do with power or compatibility but more to do with the essence of jeeping, rover power just sounds wrong and I honestly think it will devalue the Jeep for most purest
Keep the six, and fit this to ithttp://www.rodsnsods.co.uk/forum/stuff-sale/nitrous-express-single-port-wet-kit-uk-custom-painted-bottle-extras-50836or if you want a Rover, £175 SD1 here http://www.rodsnsods.co.uk/forum/stuff-sale/rover-v8-3-5-sd1-engine-bristol-%A3175-48344
Ok time to through my 2 cents worth at it, I looked into the old RR V8 for my rebuild at the early stage as I thought too it was easier than the whole AMC setup, but I was very very wrong in my assumption. The only usable RR V8 is the 3.5l as the rest have only been bored out and crack the bores very very easily, apparently most on the road have split blocks or hair line cracks just not known or cared about (this was from a RR V8 specialist for racing setups). So this limits the power output significantly. Then is the issue with boxes and transfers, both on the RR are inferior to the old AMC/Yank stuff, yes there are plenty of parts but you will fnd most of the profesional trialists and offroaders will modify there RR V8's to run Yank drivetrains. Once you have the RR V8 you then have to make up engine mounts/gearbox mounts and then require to have the propshafts custom made. Also unsure if the headers will foul on anything. I therefore went down the AMC route and with BD's help found a nice 360. Trust me this is plenty of power for a light weight Jeep, mine has no probs spinning 33" wheels in the dry. Have no idea about fuel economy but is any V8 much better than another, you are probably only talking 1-2MPG diff.If you are seriously looking for an AMC V8 I could be able to help you out as I found one over here in Ireland the other weekend (not 100% sure on size yet as I'm waiting on him to confirm), freight is not to bad (circa £90) and I would just want a little to cover my cost for removing it from the vehicle and picking it up.
No rush for anything at the moment, (tho I do have a rear crank oil leak I think)
a few of the manual boxes used in CJs were made by ford so may be easier than first expected
Quote from: WillCJ on January 23, 2012, 10:09:08 PMNo rush for anything at the moment, (tho I do have a rear crank oil leak I think)check the compression before you do anything on that engine, my 258 dropped oil from the rear crank seal, and still did after the seal was changed, problem was bad rings pressurising the sump and pushing the oil out, good news is if compression is ok the rear crank seal is a cheap easy job, seal was under a tenner and just had to remove the sump and the rear crank carrier, half the seal in the carrier the other half will punch out with a drift, fitting is reverse
My 4.2 started dying a couple of years ago so i started looking at V8 options. Ended up buying a donor 4.0L i6 and building up a 4.6 stroker with a 258 crank. Used all the 4.2 ancillaries and v belts etc so it bolted straight back in easily. With the the fuel injection and the extra low end torque it trans formed the jeep. It will easilly peg the CJ speedo if your brave enough. Apart from the pistons, wiring loom, injectos and ecu, you can use all standard parts.
I stroked my TJ and have been quit happy with it. It was much easier then transplanting a V8 and enough of a power increase to make me happy. It's not a rocket and lacks the V8 sound but it can push 36's around without straining any more. You should be able to pick up a cheap 4.0 complete with wiring and ecu cheap enough. This alone will be a great improvement over the 4.2.
