Underhood heat and throttle response

[Carmine]

I do have to agree with the others in re. to heat under the hood. I've never experienced such a hot drivers compartment as I have with my '62 409. I thought my blown '57 was hot, but this one has it beat. So far I haven't experienced and performance problems, hot or cold. Lucky I guess, Carmine.

 

[yellow wagon]

Yep we have ethanol fuel here too garbage!

 

[models916]

Mine runs very rich when the headlight ducts are blocked. I tested this with the A/F meter last year when I was getting the jetting worked out. That hot air can't take much fuel.

 

[Quickshift409]

Jason, I have a (Ram Air) air filter with 2 round 4" intake ducts. It fits the stock manifold. If your interested send a PM.

 

[poison ivy]

check fuel pressure.

 

[yellow wagon]

It's fuel percolation. It's 87 degrees and a little humid here this afternoon which was a perfect opportunity to get it good and hot and see how it behaves. About 30 min in I could notice the exhaust note change a little a sure enough, throttle response went way down. Drove it another 25 min in stop and go traffic to really get it hot and then brought it back home. I opened the hood and was met with a face full of hot air and when I stuck my ear close to the air cleaner I could hear the fuel percolating in the bowls.

Hmm. So now to find a way to move that hot air out of the engine bay better. Might try spacing the rear of the hood up

 

[62impala409]

A cowl induction hood would take care of getting the heat out! I would rather have a 2'' than the more common 4" hood. A friend of mine has a '66 Olds 442 with the 4" glass center section grafted to a steel hood. Looks like a factory hood. So well done on the underside. Keeps that Mondello prepped 425 inch motor with a 1000 cfm Holley plenty cool.

 

[yellow wagon]

I just can't bring myself to put a cowl hood on this thing

 

[MRHP]

Feed the carbs some cool air, and your percolation issues will disappear as well.

 

[yellow wagon]

I'm going to have to look into a cowl inducted air cleaner like you have. Wanna make another one?

 

[Denunger]

I would worry about that fuel line down by the headers. Any hangers, etc., mounted toward the engine? When Edelbrock gets complaints, theu don't even want metal studs for car mounting.

 

[Denunger]

carb mounting

 

[sp6t1348]

How about a "z-11" style cowl induction, where one would not need to raise the hood?? I remember seeing something on here about a member making a "knockoff" awhile ago...

 

[62impala409]

Feed the carbs some cool air, and your percolation issues will disappear as well.

Here is that big hooded 442

 

[yellow wagon]

How about a "z-11" style cowl induction, where one would not need to raise the hood?? I remember seeing something on here about a member making a "knockoff" awhile ago...

MRHP a couple posts above is the one that made one

 

[sp6t1348]

Here is that big hooded 442View attachment 36556

I have been thinkin

MRHP a couple posts above is the one that made one

If he made some more, I would buy a couple of them!

 

[John1]

Near the end of factory installed carbs, some manufacturers installed underhood fans to blow air across the carb to prevent heat related issues. Not pretty, but effective.

 

[jdk971]

use the old 442 under vehicle induction. jmho jim

 

[Phil Reed]

John1............see you are from McHenry..............I spent the weekend before last right down the road in Wonder Lake!!

 

[MRHP]

When I first was thinking of the z-11 style air cleaner, I was told it was worth a couple tenths and a couple mph . Well worth the time in my opinion.