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General Discussion for all diesel-related topics
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Buildup Showcase Threads - All Engines, Vehicles

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Performance Discussion

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Cummins Tech Section

Tech specifically for Cummins B series engines.
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Common Rail

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WVO / SVO / Biodiesel

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Methanol / CNG / Propane Blending

Place for discussion for blending of Methanol/H2O, CNG or Propane Alternative Fuels into your diesel system
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CNG Dedicated Engines

Technical discussion for dedicated CNG / LNG / Biogas Engines such as Cummins-Westport
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Transmission, Adapter, Transfercase Discussion

Discussion of transmissions, transmission-adapting, and transfer cases for conversions
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Paint and Body

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Suspension Design

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Axles & Differentials

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General Modification Discussion (Non-Engine)

The place to discuss general modification of trucks, wheelers, cars, etc. Not specific to the diesel engine.
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Diesel Motorcycles & Conversions

Diesel motorcycles and conversions of motorcycles to diesel.
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Engine & Vehicle Specific Sections

Cummins 6BT / 5.9 Conversions

Discussion related to conversion of the Cummins 5.9 B series engines
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Cummins B3.3, 6AT, & Cummins Variants -

Discussion related to other, rarer Cummins applications.
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Isuzu 4BD1T/2T

Topics related to the great Isuzu 4BD1T and 2T engines & related
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Mercedes OM617 & Variants

Forum for conversions with the Mercedes OM617 Inline 5 Indirect Inject Turbo Diesel from early 80's Mercedes Cars.
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Mitsubishi Diesels

Discussion of Mitsubishi diesels and variants
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Volkswagen Diesels

The famous Vee-Dub 1.9 TDI and IDI and other variants, 2.0, etc etc. Adapter talk, putting these into other vehicles, etc.
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Toyota Diesels

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General Motors V8 Diesels

Duramax, GM 6.2 and 6.5 diesel swaps
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Detroit, Perkins, Caterpillar

Conversations on Detroit, Perkins, Cat variants for the purposes of conversions & general discussion.
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Deutz & Other Aircooled Diesels

Discussion of a wide variety of air-cooled diesel models
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Ford Diesels

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Cummins into Fords

The specifics of Cummins Conversions into Fords... All the small and big aspects of the conversion...
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Other Engine Swaps

General conversions of all types of diesel engines
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Vendor Showcase

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Want to Buy

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For the selling of misc stuff not diesel conversion related
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Vendor Member Section 4btswaps.com Supporting Vendors

Vendor Deals

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Off Topic Section The positive place to discuss all sorts of things unrelated to diesel conversions.

Personal Introductions

The place to introduce yourself. Welcome to the board!
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Trip Reports, Adventures - All Vehicles, Engines

Highlighting trips, events, road trips, off road trips, etc...
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Show Off Other Car, Truck and Fab Projects

The place to show off some of the other sweet stuff that you build or work on, unrelated to diesels or diesel conversions. Old muscle cars, fab projects, etc.
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Tool & Shop Talk!

Discussion of Tools and other shop-related info!
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Regional

Regional Events & Get-Togethers

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Latest Posts See all new posts
  1. Buildup Showcase Threads - All Engines, Vehicles
    Ok guys figured I might as well get the build thread under way so here goes I’m swapping in a 4bt Cummins out of a 1974 P30 Chevy and a 95 GM NV4500 and swapping in newer 1 ton axles. Here’s some pics
  2. Well guys I am needing an alternator that will handle an electric fan a Stereo system and a CB radio I have the serpentine belt 4bt from a P30 van.
  3. Looking for 2 90 degree and 1 45 degree elbow looking for cheaper than what I can find online used or new in very good shape.
  4. Cummins Tech Section
    Years ago I saw a pic on this site with all sensor locations on the 4BT. Anybody know where that pic is?
  5. General Discussion
    My engine is missing the data tag and I dont have any number on the back of the block. Can I identify the cpl from the injection pump numbers? It still has the tag saying it passed emissions for 1991 which matches what year the van was. Does anyone have a list to identify ve pump numbers? Thanks
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