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Old 10-15-2010, 11:08 PM   #61
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Because the ax15s usually don't blow up, and they are behind a 4.0 only. All the 4 cylinder stuff is gold because it blows up about 5 times more often
This is true. I know it seems like its backwards you'd think you'd pay more for a stronger tranny then a weak one but the weak ones are in high demand where the strong ones really arent because like he said that don't blow on you.

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Old 10-16-2010, 09:02 PM   #62
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A ton. When getting your 350. If you get fuel injected make sure you also take the wiring harness computer and all the sensors. That is a must. After you get your 350 and ax-15 send me a pm and I'll get more into detail with you about it.
I was thinking about getting a 350 off of jegs is this a good idea? And which one should I go with? There not that expensive

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Old 10-16-2010, 10:00 PM   #63
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I was thinking about getting a 350 off of jegs is this a good idea? And which one should I go with? There not that expensive
A new crate motor would be the best way. If your going to go with new everything check out novak's website. They sell complete drivetrains with all the adapting parts you need. They will give you the motor transmission and transfercase all assembled. But do some research and pick out which would suityour needs the best.
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Old 10-16-2010, 10:37 PM   #64
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I disagree simply because you can build your own that will smoke a crate motor for less money. All you need is a donor motor to build and a good machine shop.
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Old 10-17-2010, 08:05 AM   #65
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^^ what he said. A crate motor typically doesn't have any accessories, leaving you to go hunt brackets and crap. A donor motor, even a donor vehicle, seems more cost effective IMHO. not that cost effective is the goal for any of us. LMAO
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Old 10-17-2010, 10:21 AM   #66
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Yea but it seems like he doesnt have the skills to build the motor up himself. And labor charges to have a motor built would be pretty high right?
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Old 10-17-2010, 04:38 PM   #67
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Yea but it seems like he doesnt have the skills to build the motor up himself. And labor charges to have a motor built would be pretty high right?
Yes I do not have the skills lol I'm kinda new to all of this
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Old 10-17-2010, 08:57 PM   #68
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Nah, that's where the machine shop comes in. Just take them a donor motor and have them build exactly what you want. Most of them will be able to tell you what you need to get what you want out of the motor. Machine shop bills usually run 900-1400 depending on how extreme you go and if you have them assemble it or not.
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Old 10-17-2010, 09:04 PM   #69
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I guess it depends on where you live up here machine shops can get pretty expensive but what ibuildembig is paying that doesnt sound to bad. Wouldn't hurt to go talk to the guys down at your local machine shop and see what they would charge you.
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Old 10-17-2010, 09:09 PM   #70
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I had 2640.00 in my 347 stroker motor including all the EFI stuff to make it run
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Old 10-17-2010, 09:13 PM   #71
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I talked to the local shop and they said it would be around 7 grand to build my 350 up. So thats out of the budget I've got to save up for that. For now I'm leaving it stock and rebuilding my 700r4.
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Old 10-18-2010, 02:11 PM   #72
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7K? They are nuts, I could have my guy do it and ship it there for 1/3 of that price
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Old 10-18-2010, 04:46 PM   #73
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I dint have to get a donor motor do I? Can't I just get a new one?
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Old 10-18-2010, 04:49 PM   #74
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You can, but they are gonna charge you a core charge for not having the parts to build your own. Do you not have salvage yards where you are? You can pick up a core motor for around 150 bucks usually.
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Old 10-18-2010, 04:57 PM   #75
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$7k, you either talked to a crook or asked the wrong questions.

For what it's worth, and I certainly don't mean to sound negative at all - I highly recommend you start off with a stocker donor motor. Don't bite off more than you can chew for your first project. I'm new to jeeps, but not new to engine swaps...find yerself a buddy down at the local dirt track, junkyard, whatever, and learn as much as you can before looking into building a motor. pretty much any of the above mentioned v8's is gonna snatch a jeep around pretty good, bone stock. Find an old chevy pickup or something that you can hear run..if it runs good, it is good

Otherwise, and I've been in this situation, you're gonna waste a lot of money and end up with a box of parts and a rolling chassis. Crate motors are great if you have the donor vehicle, otherwise you'll spend more on covers/brackets/radiator etc than you would have on a donor vehicle in the first place. The last one I bought didn't come with valve or timing covers, water pump, alternator, none of that stuff. I think that's pretty standard, eh?

FWIW, YMMV. JTTH.
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Old 10-18-2010, 06:07 PM   #76
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$7k, you either talked to a crook or asked the wrong questions.

For what it's worth, and I certainly don't mean to sound negative at all - I highly recommend you start off with a stocker donor motor. Don't bite off more than you can chew for your first project. I'm new to jeeps, but not new to engine swaps...find yerself a buddy down at the local dirt track, junkyard, whatever, and learn as much as you can before looking into building a motor. pretty much any of the above mentioned v8's is gonna snatch a jeep around pretty good, bone stock. Find an old chevy pickup or something that you can hear run..if it runs good, it is good

Otherwise, and I've been in this situation, you're gonna waste a lot of money and end up with a box of parts and a rolling chassis. Crate motors are great if you have the donor vehicle, otherwise you'll spend more on covers/brackets/radiator etc than you would have on a donor vehicle in the first place. The last one I bought didn't come with valve or timing covers, water pump, alternator, none of that stuff. I think that's pretty standard, eh?

FWIW, YMMV. JTTH.
Ok thanks I'm a little lost now lol I thought j could get the motor and there wouldn't be building and that u would just get a new tranny and other stuff and could put the motor right in. Guess I was wrong lol
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Old 10-18-2010, 10:10 PM   #77
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You should definitly do some more research the engine and trans swap isn't that hard. There are adapters and wiring harnesses for pretty much any engine you decide to go with. You'll still need a radiator and if you have the stock DANA 35 I would look into changing or upgrading it to handle the extra torque. You should be able to find a decent Chevy or Ford small block at a salvage yard or E-bay.
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Old 10-18-2010, 11:10 PM   #78
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You should definitly do some more research the engine and trans swap isn't that hard. There are adapters and wiring harnesses for pretty much any engine you decide to go with. You'll still need a radiator and if you have the stock DANA 35 I would look into changing or upgrading it to handle the extra torque. You should be able to find a decent Chevy or Ford small block at a salvage yard or E-bay.
Can you recommend and engine for some one like me with little experience in this stuff like what size?
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Old 10-20-2010, 04:37 PM   #79
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???
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Old 10-20-2010, 05:32 PM   #80
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the chevy small blocks seem to be the most well documented, but the ford is also well documented and Goose seems willing to help out on that. I'd go with whatever you can get the most help with, that's my plan

For me, it's going to be either a pre-injection 302 or a pre-injection 350. Either motor is simple, I believe the 350 for a while was carb'ed with electronic distributor which is better than points..unless someone can convince me that I simply can't f*ck up an ECM, I'm going carb'ed. Imma try to find a donor vehicle with A/C, I once saw a rig where the guy had converted the AC compressor into an air compressor and that was REAL slick.

Anyways, yea. Stocker for sure. The 350 should develop a bit more torque than the 302, I do believe, but either one is gonna be reasonably stout without requiring beefing up the entire drivetrain.

So for whatever that's worth. lol
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Old 10-20-2010, 11:15 PM   #81
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Nothing stock will outdo an Explorer 302, they simply scream with a mustang ecm on them. We did a swap 2 years ago into a 79 truck for a buddies daughter. Will smoke 33 buckshots through all 3 gears and gets almost 18mpg. All it takes is a donor motor, a motorsport street rod wiring harness, a mustang computer, and 5 wires to make it run
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Old 10-21-2010, 06:20 AM   #82
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Sounds like that Explorer 302 won't run with an ax-15
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Old 10-21-2010, 09:00 AM   #83
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Old 10-22-2010, 08:01 AM   #84
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goose - Explorer as in out of an Explorer SUV? Or some sort of special config 302? a la 302 boss, etc..

I guess I'd be wary of hooking up anything that's gonna smoke 33" tires through 3 gears to my stock drivetrain. Ever seen a candy caned driveshaft? LMAO I got visions of stripped axle splines, U joints that look like hand grenades, etc...

honestly, I'm just looking to have a daily driver with some balls - not HUGE balls - just some balls..

Anyways - there's a place north of here that gets all teh old police cruisers, Corwn Vic's. I know they had either 302 or 351(or whatever the metric equivalent is LOL) motors, I'm thinkin that might make a perfect donor vehicle. If it's an early 90's engine, think that would work with your 5 wire method? How much detail are you willing to go into for a stranger a couple of thousand miles away? LOL I'm looking at prolly next winter for the actual swap, but I'd like to go ahead and find a motor and start rebuilding.

Thanks already, though, yer already more than helpful.
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Old 10-22-2010, 08:53 AM   #85
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SGperformance in walden new york gave me that price. For now the 700r4 is getting rebuilt with a high performance rebuild kit that comes with a corvette servo etc. The NP231J is getting rebuilt with a new chain and 23 spline input gear instead of the 21 spline. And thee 350 is staying stock while I save penneys to get a 383 stroker kit later on. Then after I destroy the stock Dana 35 axle I'll take a 8.8 out of a explorer preferably one with a lsd and 4.10 gears.
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Old 10-22-2010, 09:36 AM   #86
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goose - Explorer as in out of an Explorer SUV? Or some sort of special config 302? a la 302 boss, etc..

I guess I'd be wary of hooking up anything that's gonna smoke 33" tires through 3 gears to my stock drivetrain. Ever seen a candy caned driveshaft? LMAO I got visions of stripped axle splines, U joints that look like hand grenades, etc...

honestly, I'm just looking to have a daily driver with some balls - not HUGE balls - just some balls..

Anyways - there's a place north of here that gets all teh old police cruisers, Corwn Vic's. I know they had either 302 or 351(or whatever the metric equivalent is LOL) motors, I'm thinkin that might make a perfect donor vehicle. If it's an early 90's engine, think that would work with your 5 wire method? How much detail are you willing to go into for a stranger a couple of thousand miles away? LOL I'm looking at prolly next winter for the actual swap, but I'd like to go ahead and find a motor and start rebuilding.

Thanks already, though, yer already more than helpful.
Yup I've prolly blown more driveshafts than alot of people lol

Yes exactly, an explorer or mountaineer is the best choice for a donor and I will explain why. They already have the correct oil pan installed, the stock exhaust manifolds will work without cutting anything, the heads are much better than any other 302, and they are full roller. I can get one around here for 450-550 pulled for me. Then all you need is the motorsport wiring harness (250.00) a 93 mustang ecm (150.00) a mustang fuel rail, distributor, coil, and injector harness (200.00) and your ready to go.

For the record I will help whomever I can if they want my help on here
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Old 10-22-2010, 09:44 AM   #87
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any particular year(s) for those vehicles?

thanks dude. yer making me believe I might be able to pull this off. LOL

bolt in frame mounts or weld in? Any preference?
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Old 10-22-2010, 09:49 AM   #88
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97-01 models

I usually make my own mounts...kind of a cradle design. I make it out of 1x1 square tube and it bolts to the engine and the factory saddle mounts on the jeep frame.
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Old 10-22-2010, 10:17 AM   #89
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OK, so:

302 out of 97-01 explorer or mountaineer
AX-15 tranny(any certain years?)
trxfer case - 23 spline(also from 6cyl wrangler, I assume?) or will my stocker trxfer work OK?

can I look in grand cherokee, etc for AX15? or is that wrangler only?

why the mustang ECM and not the Explorer? different ramps, I guess?
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Old 10-22-2010, 10:27 AM   #90
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I think AX-15 out of a wrangler will work fine for ya....not sure what will swap over from a XJ as I am not familiar with um very much. Yes the ax-15 will have the 23spl output so you will need the 231 case that has that as the input.

The reason we use a mustang ECM instead of anything else is simple. The explorer uses what they call EEC-V technology which has the plug under the dash for diagnostics which is cool....but way to hard to interface. The harness has tons more wires and sensors it wants to see a value on before it will even start.

A mustang ECM is the older technology or EEC-IV...is way more forgiving on engine mods, easier to interface, and more readily available. And the mustang ECM is a learning computer that will automatically adjust for things like, camshaft, bore and stroke, compression, etc etc...after all, its one of the only ones designed by Intel

We are running a 408 (stroked windsor) in my buddies jeep/crawler on a stock 92 mustang ECM. Now...that being said, would it run better if we sent it off and had it tuned? of course it would, but the horsepower increase versus the money for us does not make sense. I can see doing it if you were a drag racer....but for what we do 531 horsepower is plenty lol

As soon as I can get the ole ladys truck done and out of the way I plan on getting back to my projects and starting my YJ build thread. Hopefully that will help you a lil more seeing pictures of the things going together instead of trying to cipher through all my jargon lol

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