Bad Zula Engine and Drive Train - Defender Source
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  #1  
Old January 2nd, 2014, 11:57 PM
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Bill Larson
97 D90 SW
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Bad Zula Engine and Drive Train

So over the next three months I want to upgrade my D90's engine for additional horse power and just more kick. I want to have a more robust drive train for strength and overall durability on the trail. I'm having the work done because I won't have the time personally and just want it done for my summer plans.

I've been poring through the threads on upgrades looking to replicate someones build but nothing is current, but I saw several solid paths. I'm not looking to get stupid about it like 400 HP or anything or a titanium gear box...I want it to look as genuine as possible, not looking to install a corvette engine. My thoughts are to bore out a 4.0 or 4.6 and go with carbs. I want to stay with a Petrol engine, diesel is not an option for me.

I would like to have the strongest engine possible without blowing a piston through the engine. The dollars aren't a concern as long as there is long term value...all solid opinions welcome, thanks in advance. This is what I'm running now.

4.6L
Ported & Polished Heads
RPI Torque Max Cam
Trumpets cut
24# Injectors
Re-cored Radiator
Ceramic Coated Exhaust Manifolds
3” Cat-back Exhaust
Magnacore 8mm Ignition Wires
1.4:1 Transfer Case via Southwest Rovers
New Cats and Borla exhaust
Rovertracks Rear Axles.
Rovertracks Front Axles and CVs.
ARB lockers Front & Rear.
Good Year MT/R 285/75/16 on Deep Dish rims.
Old Man Emu HD springs Front & Rear
Old Man Emu shocks Front & Rear
Expedition Exchange Rear Spring Retainers
Expedition Exchange Rear Shock Mounts
Rovertracks cranked Rear Trailing Arms
RTE Front Radius Arms
Heavy Duty Shock Towers
Rovertracks HD Drag Link
Rovertracks HD Tie Rod
Rovertracks HD Panhard Rod
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  #2  
Old January 3rd, 2014, 12:14 AM
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Brian Kandefer
1957 107 wagon, 94 arles St, 101 FC
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Contact Himalaya to put an LS in it
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  #3  
Old January 3rd, 2014, 12:19 AM
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Quote:
Originally Posted by JSBriggs View Post
That 'corvette' engine is what you are asking for. A dolled up 60's Buick is just that.


If you insist on a less than robust rover V8 look into a turner engine.

-Jeff
Yeah...I'm going to be calling you...I'll fly you out for two weeks and you can set me up. I'm thinking Nitro...maybe. Little led magic on the frame...
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  #4  
Old January 3rd, 2014, 12:21 AM
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Sam
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Whose doing the work? Would a "Pre-Made" V8 work or are you trying to be all fancy on us?
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  #5  
Old January 3rd, 2014, 12:51 AM
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Quote:
Originally Posted by SMac View Post
Whose doing the work? Would a "Pre-Made" V8 work or are you trying to be all fancy on us?
Most likely British 4X4...pre-made works that's what they had in mind. Looking to get up to 300+ HP.

looking for a few "it just works" ideas...no fancy smancy. I'm all about plain Jane on the outside but excels in performance and durability.
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  #6  
Old January 3rd, 2014, 06:49 AM
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Bill Adams
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Try some machine shops in your area to see if they can modify a forged SBC stroker crank for you. Forged H beam rods, Forged pistons. This will punch the 4.6 out to just over 5 liters. Zeus gear drive timing. Stage 3 big valve heads from AluminumV8.com. Headers.
For feuling I'd swap for Megasquirt along with the daughter card for timing and spark. MSD wasted spark ignition. Aeroquip fuel pump and lines.
Lots of other details too, but that's the basics.
Carlosz did this mod to his 4.6 and pulls a big trailer with it behind his LWB
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  #7  
Old January 3rd, 2014, 09:18 AM
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Pete Ricci
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Why not change to forged pistons, drop the compression, stud the heads, add a compoud turbo set up, keep the FI. there are several methods to hide the turbos.
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  #8  
Old January 3rd, 2014, 09:35 AM
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mark kellgren
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Bill, what tranny are you running? you don't want to blow up a 380.
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  #9  
Old January 3rd, 2014, 09:42 AM
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Bill Larson
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Quote:
Originally Posted by JSBriggs View Post
I said turner, meant RPI. http://www.v8engines.com/engine-3.htm#4.8-52

-Jeff

Very nice site...that beer I owe you is now up to 2! lol...

------ Follow up post added January 3rd, 2014 08:52 AM ------

Quote:
Originally Posted by Overlander View Post
Bill, what tranny are you running? you don't want to blow up a 380.

Stock...But that will be changed up also.
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  #10  
Old January 3rd, 2014, 10:00 AM
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I think TA performance heads and 4.0 pistons on your 4.6 would be an amazing combination.

The heads on these are the problem. You can only hog them out so much, the combustion chamber shape is still there. Those TA heads look much more efficient. I'd expect better MPG and the ability to run cheap fuel.
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  #11  
Old January 3rd, 2014, 11:15 AM
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Sam
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http://www.automotivecomp.com/v8engines.htm

http://turner-engineering.co.uk/html/V8engines.html

http://www.greatplainsrovers.com

http://cannibalv8.com

http://aluminumv8.com/danddad.html

http://www.robisonservice.com/servicedep/rover_dept.asp

Besides RPI, these are some you may already be tracking. I like the reviews and price on the CannibalV8 and the 3 year warranty on the GPR units. Both do some sort of block seal... Both offer uprated 4.6s.
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  #12  
Old January 3rd, 2014, 11:27 AM
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Sam
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Like others have said, Im sure there are a lot of quality builders out there that may be able to do better....
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  #13  
Old January 3rd, 2014, 05:42 PM
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No Budlight over here Amigo...and you can drink anything you'd like on tap!
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  #14  
Old February 12th, 2014, 05:10 PM
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Looking for one or two ECU's for a 97 D90 4.0 V8...PM me if you have one in working condition!
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  #15  
Old February 12th, 2014, 06:17 PM
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Robert F
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4.9? I've got a 4.0 96 auto Disco ECM I don't need. Not sure how the alarm would interface on a 90.

I'd take those 24lb injectors out and throw them in the trash. Way too much fuel for a rover v8.
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  #16  
Old February 12th, 2014, 06:20 PM
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Typo...4.0 and corrected. Not worried about the 24's right now...but thanks!!
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  #17  
Old February 12th, 2014, 07:18 PM
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I was hoping it wasn't a typo and that you were about to do all the research for an OBD2 stroker.
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  #18  
Old February 12th, 2014, 07:57 PM
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Cameron Bell
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upgrades

Awesome, I'm excited to see what you do!
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  #19  
Old February 12th, 2014, 08:01 PM
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I'm 70% sure I'm going with a 5.2 (http://www.v8engines.com/engine-3.htm#4.8-52) and new Ashcroft boxes.
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  #20  
Old February 14th, 2014, 12:18 PM
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Interested to see where this goes Bill. I may be right behind you!
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