Extruded Hone / Abrasive Machining of intake and head

[calokie]

Ok so I ran across this Abrasive Machining/Extruded Honing, was wondering if anyone has done this with an engine and what the results were. Given the 1fz has pretty lengthy intake ports along with a rough inner surface finish, I would imagine honing along with a good port job would really improve the air/fuel mixture flow. I came across a youtuber stating that polishing the inside surface of an intake was bad, fuel and gases would build up on the smooth surface. I'm not convinced a smooth surface would allow for build up to accumulate at a greater rate than a rough surface.

I also received a quote extruded honing for 1fz upper/lower intake, cost is $661.50.

Automotive - Extrude Hone AFM - https://www.extrudehoneafm.com/industries/automotive/

 

[Somebodyelse5]

Seems like a lot of money for marginal gains.

 

[calokie]

If I own a OBD1 or later model I would LS swap it for some better than marginal gains however.... i live in CA. But $700 for increased HP and improved MPG and keeping it smog legal, might be worth it. The small MPG improvements add up overtime, not to mention more HP on those long highway climbs.

 

[Somebodyelse5]

If I own a OBD1 or later model I would LS swap it for some better than marginal gains however.... i live in CA. But $700 for increased HP and improved MPG and keeping it smog legal, might be worth it. The small MPG improvements add up overtime, not to mention more HP on those long highway climbs.

Oh, idk the rules for that country. I stay in AZ.

 

[calokie]

Oh, idk the rules for that country. I stay in AZ.

land of the free... let hope it stays that way

 

[White Stripe]

Going off of my limited knowledge of engine airflow, I would imagine you'll get more bang for your buck focusing on porting the cylinder head. I think thats where the majority of the choke points are in flow and velocity. I would think 30hp or more could be gained. You could also probably run a stroker crank shortblock with slightly larger injectors and the stock ecu probably wouldn't know the difference and gain a lot of power. For example going from 4.5 liters to a stroker crank of 5.2 liters I would think would provide 50 to 70 more hp. Torque would probably be 50 to 100 more ftlbs.

 

[mudgudgeon]

It's been around for decades.

I think it would have benefits.

Honing doesn't necessarily equal polished. Polished surfaces do slow gas flow. More friction against the shiny walls of a manifold.

From memory, the extrusion honing needs steel manifold flange plates made so the ports don't get hogged out too big, or the wrong shape.
If they had to be made, might make it expensive?

 

[rhc404]

Gaining horsepower through just cleaning up the intake manifold is hard work however you approach it. I would expect the results to be nearly immeasurable. In my race car days no one messed with extrude honing because it removes such a minimal amount of material. Either CNC or hand port or spend the money elsewhere. Tweaking the last bit of hp out of a cylinder head with thin walls was another application.