Coolant flow

I run an Eddy Air Gap, so, no heat crossover at all and the carb stays colder than on standard intake designs.



Right, so if it works on your car everyone should make their car exactly like yours, but if it works on my car that's its a one off and no one should listen. Uh-huh, sure.



I run an Eddy Air Gap with a Holley 750 double pumper. Funny you think that matters now, but are happy to give blanket advice without knowing stuff like that. Application and components matter, which is why your "my way or the highway" take on this can be nothing but wrong. In certain applications you are right, but to lump the entire hobby into that way of tuning is just silly.



No sir, it's not that simple. Colder intake air temperatures make horsepower. Making horsepower has very little to do with engine coolant temperatures, except that intake manifolds gets hotter with the engine and that raises the intake air temperature. Which is why people run cold air boxes, air gap intakes, etc., and why those things work.



I'm plenty willing to learn new things, but your take on this isn't "new" and your oversimplification of engine coolant temperature and performance is limiting your understanding. You've lumped engine coolant and air intake temperatures inseparably together, which is a mistake. Yes, you want your air charge to be as cold as possible. And yes, keeping your intake manifold colder helps with that. But air charge temperature depends on more than the intake manifold temperature, and even the intake manifold temperature isn't set solely by the coolant temperature. I'm sure you know that all the different components of the engine aren't always the same temperature. And yeah, if you get off the track and onto the street, extended operation means the intake manifold temperature is driven by a lot of different component temperatures. Your whole engine isn't operating at 160°, I'm sure you understand that. Your combustion temp is in the thousands, colder coolant isn't going to change that much at all. Your under hood engine temperature sure as hell isn't 160°, and changing your coolant temperature from 160° to 190° isn't going to change your under hood temperatures one single bit on a street car out on the road.



You don't need to do a video. There are literally hundreds and hundreds of books on thermodynamics in general and even just on the thermodynamics of internal combustions engines already, that were written by more intelligent people than both of us, that already explain all of this very clearly. Engine coolant temperature is just a single variable in making more power, and it's no where near the most important one.

If you legitimately think you can improve the tune on my engine to make more power AND maintain drivability, you can PM me and I'll be happy to give you all the details of my build and tuning. But since I've suggested that to you before and heard crickets in response, I won't be holding my breath.

I don’t have time to walk you through a tune up.

I’ll say it again. 180 should be the hottest these thing run. No more. If you want to run more compression drop the coolant temperature.

If you don’t think coolant temperature affects inlet air temperatures you are wrong. They do. That’s why air gap style manifolds work. But look at it. Coolant still goes through it.

A temp gun and some time on a dyno would show you a lot.

If you don’t have a QUALITY annular booster that’s the first place to start. Then emulsion and the main air bleed size.

That should get you started.

BTW, Uncle Tony dropped a video today. Watch that and learn exactly what NOT to do. He’s so far in the weeds on his thinking he won’t find his way out.


EDIT: The video I might make won’t be from text books and ****. It will be real world testing and results. I couldn’t care less what the long haired engineers say. If they say to run coolant temperatures over 180 they are crazy or they are obsessed with their carbon foot print. I’m not. I care about power and driveability. You get more of that with cooler engine temperatures.

Did I mention oil??? That matters too…