Ideal Diesel

For everything related to converting and up keeping diesel engines in an FSJ
Adventure_Wagon88
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Re: Ideal Diesel

Postby Adventure_Wagon88 » Fri Oct 21, 2016 1:06 pm

Where did you source the ISB170? Are they significantly quieter? I rode in a 78 f250 that had a 4BT swap and it was loud as hell but it was straight pipe and no insulation, carpet, or sound deadening anywhere so the thing was a complete tin can. Your CJ8 is probably a similar beast. Couldn't hold a conversation in it but I feel like it would be a good bit different in a nicely built Wagoneer with sound deadening and carpet. I hope I'm not wrong.

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tedlovesjeeps71
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Re: RE: Re: Ideal Diesel

Postby tedlovesjeeps71 » Fri Oct 21, 2016 3:46 pm

Adventure_Wagon88 wrote:Where did you source the ISB170? Are they significantly quieter? I rode in a 78 f250 that had a 4BT swap and it was loud as hell but it was straight pipe and no insulation, carpet, or sound deadening anywhere so the thing was a complete tin can. Your CJ8 is probably a similar beast. Couldn't hold a conversation in it but I feel like it would be a good bit different in a nicely built Wagoneer with sound deadening and carpet. I hope I'm not wrong.

If one is able to maximize the power it should be fairly easy to run a much quieter exhaust. No matter what though, insulation will have to be addressed. Truck diesels are noisy, part of the industrial aspect.

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Bufurd
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Re: Ideal Diesel

Postby Bufurd » Mon Nov 07, 2016 7:10 pm

I've put 91,500 miles on mine in the last 2 1/2 years, over 5,000 in the last 3 weeks. 74 J-20, 4bt, p-pump, NV4500, 205, 3:73 gears, 32" tires. Hauled in some scrap loads at over 16,000 lbs gvw no issues, haul my skid steer all over with it no issues. Humpty is insulated very good, don't cheap out there if you're gonna DD it. IMO the 4bt IS the perfect engine if a diesel is what you want. Cruising at 80 MPH is easy and done often, it's at 15 to 18 lbs of boost and about 800 degrees on the pyro. Mileage is 24 to 26 pounding miles, 30 is in it driven easy.

Adventure_Wagon88
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Re: Ideal Diesel

Postby Adventure_Wagon88 » Tue Nov 08, 2016 4:06 pm

Great info Burfurd, it's cool to hear from someone who has really broken theirs in. Is yours by any chance the one ZM Jeeps built?

Bufurd
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Re: Ideal Diesel

Postby Bufurd » Wed Nov 09, 2016 5:06 pm

Yes It is, that was a very good experience. Zack is a standup guy, a man I consider a friend.

Adventure_Wagon88
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Joined: Tue Sep 06, 2016 2:00 pm
Location: Leesport, PA
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Re: Ideal Diesel

Postby Adventure_Wagon88 » Wed Nov 09, 2016 7:23 pm

Awesome, I talked to him on the phone the other day when ordering my floor pans from him. I plan on talking to him more as I get further down the road towards the motor swap. With your setup, what RPMS are you turning at 65-70?

Bufurd
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Re: Ideal Diesel

Postby Bufurd » Tue Nov 15, 2016 9:27 pm

At 70 it's at 1,900 +or-, empty truck 3.54s would be perfect, towing the 3.73s are perfect. I can set the cruise at 85 and run comfortably.

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tedlovesjeeps71
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Re: Ideal Diesel

Postby tedlovesjeeps71 » Tue Nov 15, 2016 9:59 pm

Was sitting in traffic the other day and thought of this thread. In front of me, on a trailer, was a freshly rebuilt 4bt. Drool.


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eggman918
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Re: Ideal Diesel

Postby eggman918 » Wed Nov 16, 2016 6:54 am

Bufurd wrote:At 70 it's at 1,900 +or-, empty truck 3.54s would be perfect, towing the 3.73s are perfect. I can set the cruise at 85 and run comfortably.

I'm at the same place in my HighBoy....
1967 Wagoneer soon to be TDI powered
1968 F-250 CrewCab Cummins 4BT, ZF-5, NP 203/205,TruTrac's front/rear.


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