Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

Drop out or Build up

Thread Tools
 
Search this Thread
 
Old Dec 3, 2007 | 07:58 PM
  #1  
MiataLS1's Avatar
Thread Starter
Teching In
 
Joined: Nov 2005
Posts: 7
Likes: 0
Default Drop out or Build up

I have been looking at prices of complete engine assemblies on Ebay and am beginning to think I may be better off building my own. I have listed the reasons below. Maybe you could play devils advocate and help me out. It will be going into a Miata.

1. Cut oil pan for clearance
2. I would like to run a TKO500
3. Factory headers may not fit
4. I would like to have a thumpier cam
5. I worry about the factory valve train
6. Thinking AFR heads would be nice
7. Looking to the 5.3 smaller displacement and more RPM
8. I would like a lightweight flywheel (light car)
9. I'm only planning to run the alternator and A/C compressor, no P/S or use the lightweight Miata pieces.
10. Really like the GM valve covers with the divorced coils
11. Corvette short water pump will give me extra room

My thought is to find a newer less desireable 4.8 or 5.3 (if I can find one aluminum) short block and then go from there. With the above list it seems that I will be replacing a lot of parts on the engine before it goes in.

Any suggestions? Should I start with a complete engine, short block, or bare block?
Reply
Old Dec 3, 2007 | 10:07 PM
  #2  
cherryelky305's Avatar
TECH Resident
iTrader: (2)
 
Joined: Mar 2007
Posts: 751
Likes: 0
Default

If you get a pull out you get should get all the wiring and the PCM, that saves alot of hassle. saves some coin too. those 5.3's seem to be going fairly cheap, whats the cheapest you've seen?

Seem's like it could be simpler to just build what you want with all the changes you want to make.
Reply
Old Dec 7, 2007 | 07:16 AM
  #3  
MiataLS1's Avatar
Thread Starter
Teching In
 
Joined: Nov 2005
Posts: 7
Likes: 0
Default

Anyone go the build up route? What did you use and what did you spend? My thought is to go smaller displacement and run it wilder at higher RPM. I don't need much torque in a 2,600 lb car and I want it to talk to people at a stop light. Any 4.8's or 5.3's aluminum?

I am planning to start this project as soon as I get back from Iraq so now is the time to research and get a plan together.
Reply




All times are GMT -5. The time now is 11:05 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-2
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-3
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-4
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-5
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-6
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-7
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-8
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-9
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE