Engine performace

[Oldcar]

Anyone in warm climates notice superior engine performance in cooler weather?

Above 70° not as good

Low 60s good

Below 60 very crisp throtle response.

 

[sheward]

Cool air is denser (at sea level). More air in, more power out. A nice little benefit of the M119 in the 036 is the routing of fuel thru the AC system which when engaged helps cool the combustible air a smidge.

 

[nocfn]

Yes in Houston my 91 126 and 94 124 do much better when the air is cool and less humid. My wife;s 2019 E350 is bi-turbo but still faster feel when the air is cooler.

 

[ArauzMotoring]

I picked me car up for a drive one afternoon, the throttle response and drive was muted and the way the rpm’s climbed almost seemed like it squirted fuel in - in stages?

I drove later that night and it was like a 180* about face in drivability….

I definitely need to do the distributor cap slot mod.. lol

 

[duuder]

60 is perfect, especially when driving my carburetor car

 

[nocfn]

I made my slots deeper the other day and after compressed air to rid them of detritus, I soaked a blue shop towel in WD40 and wiped the cap insides. With the residual, I wiped the bits I could get to (I didn't want to remove anything else). So far, after some goofy stuff at the beginning, the burn off was faster to get to normal. Mind you it is 96 with almost complete saturated air humid here and yet I am getting almost perfect on my third time at startup. Some delay in the early kickdown from about 80C to 82C engine temp but much improved. So I believe in making sure the slots are deeper into the plastic cover on the bottom.

 

[Oldcar]

Cool air is denser (at sea level). More air in, more power out. A nice little benefit of the M119 in the 036 is the routing of fuel thru the AC system which when engaged helps cool the combustible air a smidge.

routing of fuel thru the ac is impossible......r u sure about that?

 

[gsxr]

routing of fuel thru the ac is impossible......r u sure about that?

Yup. The 034/036 have an integrated fuel cooler connected to the AC pipes. When the AC is engaged, it cools the fuel supply.

 

[emerydc8]

I never knew that, even though it’s right under our noses. Thanks to both of you for pointing this out.

 

[Oldcar]

Amazing.....

 

[nocfn]

The w126 has it as well, more elaborate system but it was an older model.

 

[gerryvz]

Yep, my 560SEC has the same thing. There's even a HOW-TO related to it, over on the 126board:

HOW-TO: Replacing 126 fuel cooler foam insulation | "HOW-TO" Tutorial Articles

It's pretty common on 126 cars to have the foam insulation that surrounds the fuel cooler pipe disintegrate and harden with age and engine-bay heat. Yet another underhood "soft part" that goes bad over time. Fortunately this is a cheap and easy replacement. My V126 provided a nice model to...

126board.com

 

[Oldcar]

Yep, my 560SEC has the same thing. There's even a HOW-TO related to it, over on the 126board:

HOW-TO: Replacing 126 fuel cooler foam insulation | "HOW-TO" Tutorial Articles

It's pretty common on 126 cars to have the foam insulation that surrounds the fuel cooler pipe disintegrate and harden with age and engine-bay heat. Yet another underhood "soft part" that goes bad over time. Fortunately this is a cheap and easy replacement. My V126 provided a nice model to...

126board.com

Routing fuel line through the ac is an interesting feature ...does running ac on increase performance above 70° ?

Obviously we are talking about the fuel line and not raw fuel....lol...

I believe the ac on may use a degree of hp