A 304 engine build video power nation - JeepForum.com
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post #1 of 12 Old 02-21-2021, 02:46 PM Thread Starter
agear
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A 304 engine build video power nation

https://youtu.be/O-xeB-m9wB8


1984 jeep cj7, 258 I6, rebuilt T176,rebuilt Dana 300, amc 20 , dana 30, 4.10's Trac-lok in rear , 4.10's detroit soft locker in dana 30, 2.5 inch bds suspension lift, 1 inch polyurethan body mount lift. Line ex. weber carburetor. factory tach. factory clock ,oem replacement speedomter cluster, and oil pressure gauge, factory volt gauge.
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post #2 of 12 Old 02-21-2021, 03:25 PM
Shawn Watson
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Right on. You guys are turning me into a Power Nation junkie


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post #3 of 12 Old 02-22-2021, 04:58 PM
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I saw that one. They got 330 hp out of that 304. Only thing is they used the edelbrock proflow 4 port injection manifold. Annnnd the eddy aluminum heads. Thats $2k for the proflow and $2k for the heads! My 360 is getting done next winter - but im going to use sock heads with some porting and polishing. Probably reuse my performer intake and go with the matching cam. Those heads are nice but really do their work in rpm ranges i rarely would see.


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post #4 of 12 Old 02-22-2021, 06:35 PM
oldschool74cj5
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hello

that looks like a easier and better choice then trying to do a complicated LS swap to me. i know part of it is im not a bowtie guy.

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post #5 of 12 Old 02-22-2021, 08:50 PM
weapon
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8k in real world expense for a 304. That episode was nuts. If you are going to spend that much you need to be doing a 401.
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post #6 of 12 Old 02-23-2021, 04:22 AM
Shawn Watson
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One of these days when I have hundred-dollar bills falling out of my arse and nothing to do, I'd like to build a 304 just to see what's what. I certainly wouldn't put a 185cc runner on a sub-6,000 rpm 310ish cube engine nor would I run an intake valve that's 53% of the bore diameter and I certainly wouldn't use a single-plane, MPFI or not.

Not a knock on the guys who built it whatsoever; when your sponsors tell you to push their products and you have a guy in need of an engine, that's what you use. I do wish they'd have pumped the compression up to at least 10:1 with aluminum heads and that EFI, though.


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post #7 of 12 Old 02-23-2021, 09:49 AM
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They did an inline six 4.0/4.6 that came out of a 2 door XJ over a year ago. They promised to run in on the Dyno for a comparison but I can’t find that episode. Has anyone seen the 2 door XJ with a 4.6 inline six dyno episode?

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post #8 of 12 Old 02-23-2021, 12:05 PM
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Quote:
Originally Posted by Axhammer View Post
They did an inline six 4.0/4.6 that came out of a 2 door XJ over a year ago. They promised to run in on the Dyno for a comparison but I can’t find that episode. Has anyone seen the 2 door XJ with a 4.6 inline six dyno episode?
At about the 15 minute mark are the dyno results. 133 Hp and 197 lb ft



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post #9 of 12 Old 02-23-2021, 01:24 PM
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Thanks...I wonder how much the new upgrades will up it from 133/197?

I guess those numbers aren’t bad considering it’s a chassis dyno and the Jeep is on 33’s. Its more than a 258 would make, but then it should more than double what a 258 would make.

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post #10 of 12 Old 02-23-2021, 02:23 PM
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Quote:
Originally Posted by Axhammer View Post
Thanks...I wonder how much the new upgrades will up it from 133/197?

I guess those numbers aren’t bad considering it’s a chassis dyno and the Jeep is on 33’s. Its more than a 258 would make, but then it should more than double what a 258 would make.
Yeah that xj setup has to be a lotta drag on any engine. Considering they only made about 60 hp and 96 lb ft on the old 4.0L its a good improvement.
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post #11 of 12 Old 02-23-2021, 05:27 PM
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I'm planning on the Pro Flow MPI on my 304, but I'll run stock heads with mild port & polish. I'm also thinking bumping up to 9.5:1 compression and 1.72 roller rockers with a similar cam should have me in the neighborhood of those numbers the Power Nation guys got. I ran a very similar recipe on my Mach 1's 351C and it's pulling around 400hp at the crank - with an Edelbrock 1406 carb (can't wait to see with the E-Street EFI does for it).
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post #12 of 12 Old 02-24-2021, 01:06 PM
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Quote:
Originally Posted by Shawn Watson View Post
Right on. You guys are turning me into a Power Nation junkie


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