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NB Exocet Seeking LFX Glory... Valhalla!

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NB Exocet Seeking LFX Glory... Valhalla!

 
Old 04-26-2018, 03:21 PM
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Default NB Exocet Seeking LFX Glory... Valhalla!




Bought this car complete in late 2016 and have replaced damn near everything on it because I am OCD and wanted a few upgrades. It used a 1999 NB as the base with an FMII turbo kit and last dyno it put down 255whp. The car is an absolute beast and the funnest thing I have ever driven. You basically point it and pull the trigger like a gun. I love the car but I am ready to go back to an ultra reliable naturally aspirated motor so I can beat on it without worry. I don't trust the turbo BP for a track motor after seeing the amount of work many people put in to make them reliable on track. Thankfully Ryan (ThePass) has done a lot of the R&D on the LFX swap and reaching the potential of it in a miata chassis on a track. Goal is an ultra reliable 300whp on E85 and then drive the hell out of it.

Just tracked down a super low mile (18k) MV7 Cadillac 6-speed transmission. These things are a bit rare because most Cadillac owners understandably want a slush box in the base model CTS. Next I'll be sourcing a low mile 2015 Camaro LFX engine and a 3.42 Cadillac G80 LSD. And finally the V8 Roadsters LFX kit.

Expect to see a part out sometime in October as I definitely want to drive the car over the summer and then work on it over the winter. Cheers and will update this as I acquire parts and make progress.
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Old 05-06-2018, 01:04 PM
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Holy hell finding a low miles 3.42 G80 LSD is tough. The new ones apparently doubled in price due to a manufacturing supplier change making them about $1,500 now.

Good news is I found a 57k mile 3.42 LSD on ebay out of a 2006 STS for $250 shipped. The parts interchange data on the 3.42 G80 for the 2006-2009 CTS is all over the place by the way.

From V8 Roadsters:

We utilize the Getrag in our road course and street cars.
When sourcing the Getrag look for the 2006-2008.
The later models have casting and seal updates.
G80 series limited slip GM part numbers:
3:23 – 25978162
3:42 – 25873500
3:73 – 25873497
3:90 – 25968531

Available in the following vehicles, RWD only (in reference to 3.23)
2005-2007 CTS Base 3.6L
2008-2009 SRX base 3.6L and 4.6L
2009 STS Base and Platinum 3.6L

I think the diff from the STS can be from 2006-2009 fyi. Will be able to confirm shortly when my diff gets here on Tuesday.
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Old 05-06-2018, 02:07 PM
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Rode in a turbo exocet a few years back and it was an absolute blast. Looking forward to your lfx powered exocet. That blows about diff prices, glad I got my 3.42 when I did.
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Old 05-06-2018, 02:15 PM
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My track has seen a fair number of these LFX conversions spin their bearings. I think you would be well-served to plan for an Accusump.
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Old 05-07-2018, 10:06 AM
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Originally Posted by hornetball View Post
My track has seen a fair number of these LFX conversions spin their bearings. I think you would be well-served to plan for an Accusump.
Thanks for the heads up! I'll start looking into it.
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Old 05-08-2018, 06:29 PM
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So here is the diff from a 2006 Cadillac STS. I can confirm this is the correct part referencing ThePass' thread here...

https://www.miataturbo.net/engine-pe...-85075/page39/

"3.42 LSD:
15793754 - superseded now by 25873500"



Getting that oem front busing out is a [email protected]#cker!!!

A 34mm impact socket and a 3lb sledge did the job though. Be sure to crush the lips in with a screwdriver or punch first to make it easier.

I'm replacing it with a urethane bushing from creative steel.
https://creative-steel.com/shop/04-0...ntial-bushing/
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Old 05-17-2018, 10:55 AM
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MV7 is here! Snagged one with 18k miles from Canada. Shipping wasn't too bad and these things are getting tough to find with low miles. Looks like it is in great condition.

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Old 02-04-2019, 04:56 PM
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A long overdue update. I decided to keep the 3.91 OS Giken I have in the car currently as it should be a riot and lots of burnout fun. We'll see how streetable it is.
Sold the 3.42 G80 LSD I had to a member on here.

Got the Kmiata diff braces and an MGW shifter. Spoke with V8 Roadsters today and they are willing to attempt to modify the MGW shifter, so we'll see if it is possible. I really want to use that MGW shifter so fingers crossed.

Found a totaled 12k mile 2015 camaro in Houston with a good engine for $1,250 with the starter, alternator and gas pedal. Car was totaled from driver side damage and was not a rollover. Engine is currently running and I'm picking it up Friday.

Update on the ECM... V8Roadsters confirmed the ECM I need is a GM Part # 12648906. Got one on ebay for $60. More updates soon as the partout and swap should begin soon.

I'll be getting the Jacfab intake spacer and ported intake along with the overkill E85 kit (tune and sensor) and 80mm throttle body. I think that combo may be able to get up to 340whp, so we'll see.
LFX V6 Performance | JacFab LLC : Custom Design & Camaro Accessories
:: Overkill Motorsports ::

Parts still needed:
Custom Driveshaft
V8R wiring harness
Modified Shifter
Kmiata PPF Delete
Ticon 2.5" Titianium Exhaust and Sidepipes (hell yeah!)
Custom intake
V8R lfx/exocet engine mount kit
New LFX clutch and flywheel from summit
V8R clutch kit
V8R NB/LFX Gauge adapter or custom gauges
Modified oil pan
DW300 fuel pump
Harbor Freight Engine Stand and 2-ton hoist

Last edited by LukeG; 02-04-2019 at 05:09 PM.
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Old 02-08-2019, 05:23 PM
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Can't wait to see how this turns out. Sidepipes
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Old 02-09-2019, 12:19 AM
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Drove to Houston today to pick up the 2015 LFX engine. Lucked out and found a car with only 12,000 miles that had been in a driver side collision with no rollover. The windshield was pretty interesting. Looked like a deep head print with hair still in the glass on the passenger side.

We managed to get the engine to fit into a Honda CRV and got it back home without any issues. Knocking down the checklist of parts needed pretty much daily now. The oil pan has been ordered from V8R and they said it will be 2 weeks. Also sent them my MGW short shifter to see if they can modify it to work. That MGW shifter is a work of art, absolutely gorgeous. Also received my DW300 fuel pump that is E85 friendly.

Parts still needed:
Custom Driveshaft
V8R wiring harness
Kmiata PPF Delete
Ticon 2.5" Titianium Exhaust and Sidepipes (hell yeah!)
Custom intake
V8R lfx/exocet engine mount kit
New LFX clutch and flywheel from summit
V8R clutch kit
V8R NB/LFX Gauge adapter or custom gauges




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Old 02-09-2019, 12:19 PM
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Need a little help finding some small clips on the transmission. I've searched every parts diagram and website I can find, but for the life of me I can't figure out what these three parts are to order them. My transmission came with these three clips missing. If anyone knows what the part numbers are for these clips it would be a massive help.

Image taken from ThePass' LFX thread.

Edit: I think I found the two part numbers... 92293203 and 25753853 (x2).


Last edited by LukeG; 02-09-2019 at 06:19 PM.
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