B3.3T Jeep YJ
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Joined: Feb 2008
Posts: 194
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From: Louisiana, U.S.
I like the AX 15, but I may try to find a Getrag 238 6 speed out of a Dakota. It has the 3.9 bellhousing, so I can follow 95Z28A4's approach. The 4.24 first gear should make up for any inertia penalties of using 31x10.5 inch tires vs TDIWyse's 30x9.5 inch tires, and it has the similar overdrive ratio of .79. Should also mate up to the 231 T/C once I get a new input gear.
I've decided to use the AX15 with the Dakota 3.9 bellhousing instead of the Dodge NV3500. Cruise RPM will be 1850 with 235/75/17 tires and 3.07:1 gears instead of 1700 with the NV3500. I've had very good luck with the AX15 in my old 1995 XJ. It seems to be smoother shifting and more reliable than the NV3500. According to the specs, the AX15 isn't as strong as the NV3500, but many will argue otherwise. If I grenade the AX15 behind the QSB3.3T, I have the option of http://www.rsgear.com/terminator.asp . RSGear claims 345 lb/ft rating (5th gear). The 6 speed Getrag 238 in the 2005+ Dakota and Ram 1500 may also be an option.
I purchased an AX15 from a 1996 XJ with 3K original miles and a NP231J from a 1999 XJ with 28K original miles. I plan to install a slip yoke eliminator kit in the NP231 before installation.
I purchased an AX15 from a 1996 XJ with 3K original miles and a NP231J from a 1999 XJ with 28K original miles. I plan to install a slip yoke eliminator kit in the NP231 before installation.
Dodge Getrag 238 ratios
1st 4.23
2nd 2.53
3rd 1.67
4th 1.23
5th 1.00
6th 0.79
Reverse 3.84
.
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Joined: Apr 2009
Posts: 28
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I envy you guys. I can't get away with a B3.3T. Stupid CARB like AZ standards! 
The only good news is that I only have to pass '94 standards and not the standards of the engine year.
Right now I'm trying to do research on engines that will meet or exceed the emissions requirements, even if they aren't EPA certified, but perhaps Euro IV certified.
I'll let you know what I ultimately decide for this build up, but it looks like it may not be diesel this time.
The only good news is that I only have to pass '94 standards and not the standards of the engine year.Right now I'm trying to do research on engines that will meet or exceed the emissions requirements, even if they aren't EPA certified, but perhaps Euro IV certified.
I'll let you know what I ultimately decide for this build up, but it looks like it may not be diesel this time.
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Joined: May 2009
Posts: 100
Likes: 0
From: Louisiana
I envy you guys. I can't get away with a B3.3T. Stupid CARB like AZ standards! The only good news is that I only have to pass '94 standards and not the standards of the engine year.
Right now I'm trying to do research on engines that will meet or exceed the emissions requirements, even if they aren't EPA certified, but perhaps Euro IV certified.
I'll let you know what I ultimately decide for this build up, but it looks like it may not be diesel this time.
The only good news is that I only have to pass '94 standards and not the standards of the engine year.Right now I'm trying to do research on engines that will meet or exceed the emissions requirements, even if they aren't EPA certified, but perhaps Euro IV certified.
I'll let you know what I ultimately decide for this build up, but it looks like it may not be diesel this time.
stock jeep flywheel with a hub adapter to the mercedes that accomodates the jeep pilot bearing !!
and the stock Jeep clutch and starter !!
stock ax-15 bellhousing and stock mercedes exhaust !!
This combination is supposed to get 32 mpg highway and 23 city
.....this is what the guy who originally did this swap ( and gave me the inspiration ) is getting !! Any way let me know ...... I have all the measurements in the mill and lathe and all you have to do is find a donor car .......... which provides everything I cannot !!! LIke motor mounts , exhaust , and all creature comforts !!
The guys with these cars in California are not having any trouble passing smog tests so AZ should be a breeze !!
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Joined: May 2007
Posts: 7
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Right now (Who know how long it will last. They say next year!), Light Trucks and Autos with diesels are not Smoged in California.
You can't bring (Transfer/register) a diesel in to the State unless it meets the new requirements, (2010 CARB) or it has 7,500 miles on it.
However, you can take a gasser and change the engine to diesel. But to get the vehicle registered after the swap, you have to take it to Dept of Motor Vehicle (DMV) for them to sign off on. And as stated above, they are not smog checking them right now.
The last one I took down, they looked under the hood, and said, "Yep, it's a diesel." But a friend had a different person look. And, they read the tag on the engine block; it said "Off Road". Well that was the end of his day at DMV. Off Road engines, no matter gas or diesel cannot be used in a vehicle, in California.
The law does state that the engine must be the same year or newer than the one being replaced. And all of the other EPA stuff applies. This limits what you can find to swap out.
My jeep was diesel to start with; so putting a different engine is pretty safe, as they will most likely never take a look at it.
You can't bring (Transfer/register) a diesel in to the State unless it meets the new requirements, (2010 CARB) or it has 7,500 miles on it.
However, you can take a gasser and change the engine to diesel. But to get the vehicle registered after the swap, you have to take it to Dept of Motor Vehicle (DMV) for them to sign off on. And as stated above, they are not smog checking them right now.
The last one I took down, they looked under the hood, and said, "Yep, it's a diesel." But a friend had a different person look. And, they read the tag on the engine block; it said "Off Road". Well that was the end of his day at DMV. Off Road engines, no matter gas or diesel cannot be used in a vehicle, in California.
The law does state that the engine must be the same year or newer than the one being replaced. And all of the other EPA stuff applies. This limits what you can find to swap out.
My jeep was diesel to start with; so putting a different engine is pretty safe, as they will most likely never take a look at it.
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Joined: Jun 2007
Posts: 11
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3.3 Injection Pump
Everyone seems to be using the rotary pump. I,ve come across a 3.3 with rail pump, 85 hp @ 2600 rpm. How about this engine, and are these tuneable, as in turning the fuel up, and advancing the pump timing ? Are the Rotary's better or just what this discussion started with ?
Thread Starter
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Joined: Mar 2004
Posts: 380
Likes: 1
From: Iowa
Do you mean common rail or inline pump?
I choose the rotary pump because at the time it had the highest hp and rpm rating, I was familiar with that type of pump and knew how to tune it, it would work well with biodiesel, and it was available new with warranty at a local place that could provide parts and serice if needed.
I choose the rotary pump because at the time it had the highest hp and rpm rating, I was familiar with that type of pump and knew how to tune it, it would work well with biodiesel, and it was available new with warranty at a local place that could provide parts and serice if needed.
Everyone seems to be using the rotary pump. I,ve come across a 3.3 with rail pump, 85 hp @ 2600 rpm. How about this engine, and are these tuneable, as in turning the fuel up, and advancing the pump timing ? Are the Rotary's better or just what this discussion started with ?
Thread Starter
Registered User
Joined: Mar 2004
Posts: 380
Likes: 1
From: Iowa
I'm not familiar with the inline pumps. Some of the 6bt and 4bt guys have inline pumps and they sure seem like they can tune them. The governor might be an issue with the 3.3 inline pump.
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Joined: Jan 2008
Posts: 100
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Everyone seems to be using the rotary pump. I,ve come across a 3.3 with rail pump, 85 hp @ 2600 rpm. How about this engine, and are these tuneable, as in turning the fuel up, and advancing the pump timing ? Are the Rotary's better or just what this discussion started with ?
Hi,Hayabusa007
According to the ESN you have the same Zexel pump we have. Inline pumps are used on Tier II engines with the lower ratings 60-70 hp.
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Joined: Jun 2007
Posts: 11
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AstecUnderground also did have the 85hp avalible also, but they are gone. The non turbo is making only 20 ft. lb.less torque than the 4.0. I figure a little tuning will at least match th 4.0 . So I ordered one of those.
What I want to know is how to attempt to match this with the auto trans. I'd rather not, but I could always go with a GM trans to get a diesel valve body, and torque converter.
What I want to know is how to attempt to match this with the auto trans. I'd rather not, but I could always go with a GM trans to get a diesel valve body, and torque converter.