Just read about the aero of a Hyundai Ioniq 6 and the different tricks it uses to get the Cd down to 0.21

https://en.wikipedia.org/wiki/Hyundai_Ioniq_6

I might be worth looking one over carefully for potential aero mods to a pickup.

The replacement of “elephant ear’ outside mirrors
with thin aero shape video cameras
deserves some pondering

Depending upon your level of insanity, you may be interested in this HRD. Computer is set up for 18 to 1 AFR at part throttle cruise.

https://charlotte.craigslist.org/pts/d/concord-auto-chrysler-computer/7522075592.html

Saw a “Rivian” pickup charging at a Walmart last week.
I noticed that it did not have a front air dam, but did have front “half spads” covering the outside front third of the front tires.
Underbody was very smooth.
At the rear of the underside there was an upward slope creating a “diffuser” like Formula 1 car rears.
Had what appeared to be a factory tonneau of the roll up slat design.

I always wonder what all those well scienced out aromatics mods would do to ICE cars? They really have to stretch their imagination to squeeze every last bit of range out of those but never really apply that tech to real cars and trucks.

I stumbled across some really nice un-cracked magnum heads for this project so I will be porting them and milling them as much as possible... What do you guys think of sinking the valves in the magnum head a little so I can mill it more??? Would say .050 down hurt flow or anything? Seeing how the intake valve is the limiting factor for milling it more this would allow a little more milling to further reduce the chamber size and get some super size compression going in here. I could shim the springs or maybe run some LS chubby springs... what else am I missing with this idea?

I don't think I would sink the valve. I had small chamber W5 heads and they were the same with the valves very close to the deck. I had them shaved down to the seat so the intake valve actually set below the deck surface.

Thinking more on it this is probably what I will do then put a nick in the piston if I need it. Sinking the valves will in itself lower compression, going to be chasing very diminishing returns sinking valve and gaining a CC and then milling it to lower it 2 CC. I really wish I could find some drop in flat faced valves for these...

Coating the piston crowns and cylinder head chambers with a heat rejecting thermal ceramic coating would reduce the CC’s

The coating alone is also supposed to “approximately” improve fuel economy 3-4%

This technique is at least 20 years old.

I think some BMW M series have it.

sample quote

Thermal Barrier Piston Coatings

A Thermal Barrier Coating is a spray-on coating usually applied to the top surface of the piston. Its function is to reduce heat transfer into the top of the piston. The benefit of Thermal Barrier Coating is highly dependent on the application and its use. Thermal Barrier Coatings are more effective if other components of the engine such as the combustion chambers, valves, and exhaust system are also coated.

Advantages:

Thermal barrier coatings will reduce heat transfer from the combustion chamber to the piston crown.

Disadvantages:

There is some additional cost added to the price of the piston for adding a Thermal Barrier Coating. While the cost may be somewhat insignificant, there will be additional expenses in coating the other combustion components in order to yield the full benefits of Thermal Barrier Coating. Once the piston is coated, there cannot be any machining or modifications done to the piston crown. If any modifications are needed, the piston will need to be recoated.

Mahle offers its Powerpak piston kits which come with the Grafal coated piston skirts and a phosphate coating. These two coatings are mostly utilized for street and racing applications and have been proven reliable for many years. They are applied during the production process, so it is very inexpensive and well worth the benefits when the cost equates to pennies on the dollar. The other coatings are beneficial but are structured mainly for more specialized applications where engines are under severe and extreme conditions.

The benefits of piston coatings have been debated for many years, but if properly utilized in the right situations, they can be a great way to extend the internal part’s life expectancy and even the performance it delivers. If you think a particular coating might be better for your application or you are not sure which would yield the best results for your engine, give the folks at Mahle Motorsports a call and get the best recommendation from professionals.

end quote

https://www.chevyhardcore.com/tech-...s-when-you-should-and-shouldnt-use-them/

Coating the piston will not increase compression as it is already going to be as close as I dare to the head, with a film on it i will have to reduce piston to head distance the same amount. It would still have the thermal benifit but I would have to measure and make nachos in them before the coating, also if I get too close it will touch the head and possibly mess up the coating on the head and the piston...

Is there any good DIY kits that you know of?

I do not know of a DIY kit.

I would not sink the valves as you would be cutting through the hardening on the exhaust seats.

Just checked the Swain coatings sight they claim to have a piston coating that reduces octane requirement. I have an email in to them to find out more and will share what they tell me when I hear back.

Dave, do you have any ruined or unacceptably deep cracked Magnum cylinder heads?

I am just wondering whether there is enough metal around the factory spark plug hole threads to bore it out and re-thread for larger sparkplugs with deeper projected noses?

That would remove a few CC’s....

Check with Techlinecoatings.com they had diy products at one time, not sure if they still do

Check out my 2015 thread on
https://geometroforum.com/viewtopic.php?p=274701#p274701
CBC2 POWERKOTE heat coating
and Tech Line DFL-1 for bearings and cam

It still gets 52 mpg at 70 on a level highway.
28 years old and no one has made a more economical car since.

My 5.7 1997 RAM wagon gets 16 hwy at 70