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

5.3 swap RX8 continuation

Thread Tools
 
Search this Thread
 
Old Sep 20, 2016 | 07:20 AM
  #1  
PureAdrenallen's Avatar
Thread Starter
Registered User
 
Joined: Sep 2016
Posts: 1
Likes: 0
Default 5.3 swap RX8 continuation

Hey all, I'm working on swapping in an L33 5.3 into an RX8. The swap itself is mostly done, I'm just at the working out the quirks portion of it.

The original build can be found here.

I have a list of things still to do on this car before it's driveable really.

Since I got it last weekend I have done the following:
  • Removed the procharger since the bracket was for an LS2. I will be having the bracket machined to match the 5.3 pulley setup. Right now I have a corvette belt tensioner on it and it's running N/A.
  • Replaced the broken radiator fan with a new SPAL fan that does something like 1800 CFM (pretty great).
  • Fixed a leaking fuel line. The driver side feed line to the fuel rail was streaming out, I just replaced the whole line.
  • Re-calibrated the ECU for the 5.3 engine, was on the LS2 setup which was causing it to run a little rough.

There is quite a list of things left to do. Here is my current list:
  • Get a belt for the N/A tensioner
  • Measure the procharger bracket and figure out what dimensions it needs to be machined to
  • Radiator fan is currently reversed, so the wiring needs flipped
  • Radiator fan is hot wired I will be wiring this into the existing MSD ECU so it comes on based on ECT
  • Throttle pedal is stock rx8 modified, but it only goes 50% throttle. I will likely be replacing the throttle with truck pedal
  • Reverse doesn't engage. I was told it was the reverse tab, so I will be dropping the tranny and putting a new one in
  • Steering rack has a LOT of play. Huge deadspot in the center of the wheel, so I will be either replacing or fixing it
  • Tach bounces around more than I like above ~3k rpm, this might be a wiring issue. I have yet to dig much into this
  • Speedometer needs to be wired in
  • Boost gauge needs to be mounted and wired in
  • Turn signals do not work at the moment, this shouldn't be a hard fix though.
  • Get 8 rib pulley off the procharger and put the new 6 rib one on to match accessories.

Proof:

Reply




All times are GMT -5. The time now is 11:42 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE