LS4 / F40 swap - fieroguru (Page 180/216)
fieroguru MAY 01, 04:50 PM
Fabbed up the sway bar mounts:




The 369SXE is said to be better suited for small cube, high boost applications. General internet theory is that it is due to the much smaller gap in the housing for the air off the wheel to exit.
The gap is quite small being 0.225 to 0.25" and the older versions were about twice as large from other pictures.



So while everyone thinks the main issue with the 369sxe is the gap, I haven't ever seen someone try to modify it. So why not... went ahead and opened that section of the compressor housing up to .350".



The cover also had the hose barb outlet section cut off and machined flat with a pilot bore to accept a V-band:



Last thing I did this weekend was tack together the cold (non-I/C = warm) side. V-band off the compressor, silicone coupler at the TB. There is a honeycomb airflow straightener about 1.5" after the diameter transition. The LS7 MAF will be after it and before the bend.

[This message has been edited by fieroguru (edited 05-01-2022).]

Steel MAY 02, 05:49 AM
That's really impressive work, I really like how you've managed to install everything so well/proper in such tight spots.. looks amazing.
fieroguru MAY 03, 10:16 PM

quote
Originally posted by Steel:

That's really impressive work, I really like how you've managed to install everything so well/proper in such tight spots.. looks amazing.



Thanks! Keeping things organized, compact and hidden is an obsession of mine. Lots of thought, trial, error and rework is involved to get to the final elegant solution.
fieroguru MAY 08, 07:46 PM
I have been working on adapting an off-the-shelf twin disc clutch to the LS4/F40 and to the point I need to actually check the depth and clearance to the differential bulge in the bellhousing. It will require some modifications to my existing aluminum flywheel, but I don't want to modify it until I know it fits... So I pulled the billet steel 168 tooth LS1 flywheel out from under the work bench and turned it down on my brake lathe.

It is now the same OD as my aluminum flywheel and a smaller OD than all the prior pressure plate bolt patterns. The next step is to drill the pressure plate bolt pattern.


I also started working to finalize the exhaust discharge from the wastegate. Disconnected the wastegate muffler to move it closer to the wastegate and make it parallel to the floor as well as to the muffler. Still pondering if I will connect it to the full exhaust of just run it down and dump it at the bottom of the cradle. I need to get some more 2" 16ga stainless mandrel bends.

[This message has been edited by fieroguru (edited 05-08-2022).]

fieroguru MAY 15, 04:05 PM
Only had about 1/2 day to work on the swap this weekend so focused on the cold side and waste gate plumbing.
Removed about 2" of the 2 1/2" tube before the transition to 4" and added about 2" more of the 4" diameter tube after the transition. The longer this section of tube is before the bend the happier the LS7 MAF will be. Also mounted the 50mm blowoff valve and figured out the rough placement for the air filter.



Finished mocking up the wastegate exhaust dump. I decided to just dump it under the cradle vs. routing it into the main exhaust.



Still need to fit the resonator tube, fabricate all the support brackets for the exhaust, finish up the work with the heat shields for the hot side then lots of finish welding on the exhaust...

[This message has been edited by fieroguru (edited 05-15-2022).]

Will MAY 16, 10:18 AM
Careful you don't overheat your sway bar.
fieroguru MAY 17, 08:23 PM
I hadn't given much thought to the exhaust getting the sway bar hot enough to impact its heat treatment.
I might just add a couple more heat shields to keep it warm vs. hot
InTheLead MAY 20, 11:03 AM
I would think by ceramic coating the manifolds, exhaust and adding ceramic coated heat shields or even exhaust wrap in key areas would suffice.
Will MAY 20, 12:08 PM

quote
Originally posted by fieroguru:

I hadn't given much thought to the exhaust getting the sway bar hot enough to impact its heat treatment.
I might just add a couple more heat shields to keep it warm vs. hot



That was a joke.
fieroguru MAY 21, 02:02 PM
Since I won't have much time to play with the car this weekend, I just played around with the turbo oil drain fitting. I had picked up some off the shelf fittings to try, but they interfere with the heat shield and the internal passages are smaller... so I will stick with the one I made that uses a 3/4" drain tube and clears everything. Then I focused on making it look less blocky, but not 100% complete at this point.