Just looked up the numbers on our engine. My memory was off a little. Actually got 356HP @ 5500, and 404 ft. lbs. @ 3500.
Just looked up the numbers on our engine. My memory was off a little. Actually got 356HP @ 5500, and 404 ft. lbs. @ 3500.
Don't mean to hijack this thread, but, 1980_Cj7, are you having any detonation problems at that CR - and on what gas? What deck clearance didyou end up with?Originally Posted by 1980_Cj7
Bare Tub Restoring 69 BBB Javelin SST 390 Go/Mod Pak
Frame Off Restoring 82 Wagoneer with 401 MPEFI transplant
"First rule of government funding; Why build one when you can build two at twice the price!"
I'm picking up the stock 360 saturday. Should I have the machine shop assemble it too? It doesn't seem to be to complicated to assemble it as long as i torque everything in sequence and proper amounts.
That's going to be up to how you feel about your own mechanical abilities.
Im takeing my 401 in to have it cleaned up and machined, crank turned, and new cam. While it's there, im going to have them install the crank, cam, and timing gears/chain. I dont feel real comfortable with cam bearings and main bearings just yet.
Im haveing them go through the heads also...install new valve guides and seats. 3-angle. from there i can re-assemble the heads.
Im hopeing that will save me some money by doing a good portion of the assembly myself, i could be wrong though.
401cid, T18a/D300 twinsticked.
Lifted, locked, and Swampered
"Its flat here...real flat. And the locals smell like potatoes."
We're running 93 octane pump gas, and no detonation problems, just goes thru gas like nobody's business. Just replaced the sending unit in the gas tank last night in fact. The fuel gauge has never been close to accurate and it has always been a guessing game. Would only go to like 5/8 when full, and consequently you hit empty way before you actually were. Could get away with it with the 258, but with this thing, there's not much leeway for guessing.
I think we are running too rich. If you stand behind the exhaust pipe, you can feel "moisture" hitting your legs (wearing shorts) and get little black dots all over them. This if even like 5 feet away from the pipe. Experienced this on a cold start. Didn't check to see what is going on once it's warmed up. No choke on it. We have the Edelbrock Performer 750 carb set to the richest settings with the rods and jets.
Oops, missed your one question. We ended up with 0 deck clearance and therefore just the thickness of the gasket for piston to head clearance. I think the Felpro is something like .043 to .045.
We haven't tried anything but 93 octane yet, as we are really paranoid about detonation after what happened last year, even though that was caused by a poor excuse of an engine builder. The engine/Jeep is so loud, it's hard to hear pinging, so we're playing it safe and sticking with 93 octane for now, and being conservative on the timing. Running great. Normally runs under 180 degrees and worst it gets up to on really hot and humid days is a hair over 200. We were worried about going .040 over, but so far so good.
Only had it "offroad" once so far, on a rock course at the PA Jeeps Show 2 weeks ago, but the difference in torque is unbelievable over the tired old 258. You don't even have to give it any gas, it just climbs right over the big rocks at an idle.
well i picked the motor up yesterday! now to tear it apart.
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