V8 fuel economy

[greasess]

So you plan on testing a 30/1 afr? I look forward to seeing your results. I was going to try as lean as 17/1 and go from there. My o2 won't even read past 18/1. What o2 sensor are you using? I wonder where your dcr is at 2 psi. What engine managment are you using? MS3 maybe?

[pgfpro]

Originally Posted by greasess

So you plan on testing a 30/1 afr? I look forward to seeing your results. I was going to try as lean as 17/1 and go from there. My o2 won't even read past 18/1. What o2 sensor are you using? I wonder where your dcr is at 2 psi. What engine managment are you using? MS3 maybe?

I've been running at 30:1 for a few years now. I'm calculating anything past 21:1 A/F on mass air and fuel flow numbers. I'm running two wide-bands, a Innovate and AEM. The Innovate reads up to 21:1 the AEM reads up to 18:1.

I'm not to sure what my dcr is as of right now? My "turbo compound system" helped a ton for keeping great engine delta p numbers.

I'm running ECM Tuning for engine management.

[Grim]

I had friends that commuted in a 6.2l 6speed Corvette till they had a kid. They regularly got 32mpg.
Not sure why you wouldn't do some aero mods. A lot of them are cheap not all that noticeable but can go a long to helping your mpg. Skirts, dams, belly pans don't look bad if done right and making it more slippery is like adding hp.

[greasess]

I plan on doing aero mods at some point. I'm just setting a goal for myself with engine mods only first. My primary radiator and water pump will be in the back so I'll have to do some creative ducting any way. Since I'll have a coolant temp of 240 F I'll need a radiator about half the size of the one I have now. The coolant lines going to and from the front of the car will be aluminum and welded to the aluminum belly pan and I feel they will contribute to cooling significantly. Maybe I should just make a belly pan that IS the radiator. That would keep my CG low and between the wheels. Not to mention less drag! Has anyone ever tried anything like that?

[Grim]

It's and interesting idea (radiator belly pan). I know the water boxer VW Vanagons got a lot of cooling from pumping the coolant from the back up to the radiator in the nose. Didn't have a very big radiator at all.
I think in normal driving with air flow it would work. My worry would be when stuck in traffic especially somewhere hot having all the Heat pooling under the car.

[user removed]

Ever measure the temperature of asphalt in the summer when it's 90+ outside?

regards
mech

[dirtydave]

redhotracing's camaro @ Welcome to Landracing.com

[wmjinman]

Wow, I LOVE the aero on that thing! Nicely done!!!

[wmjinman]

Originally Posted by Grim

It's and interesting idea (radiator belly pan). I know the water boxer VW Vanagons got a lot of cooling from pumping the coolant from the back up to the radiator in the nose. Didn't have a very big radiator at all.
I think in normal driving with air flow it would work. My worry would be when stuck in traffic especially somewhere hot having all the Heat pooling under the car.

Boy, better be careful not to high center on anything, huh? That might ruin your day!

[wmjinman]

Originally Posted by greasess

I plan on doing aero mods at some point. I'm just setting a goal for myself with engine mods only first. My primary radiator and water pump will be in the back so I'll have to do some creative ducting any way. Since I'll have a coolant temp of 240 F I'll need a radiator about half the size of the one I have now. The coolant lines going to and from the front of the car will be aluminum and welded to the aluminum belly pan and I feel they will contribute to cooling significantly. Maybe I should just make a belly pan that IS the radiator. That would keep my CG low and between the wheels. Not to mention less drag! Has anyone ever tried anything like that?

Whoa - I like your ideas now, greasess! With the radiator in the back (or incorporated into the bellypan, you can completely block off the front, and that will help your aero a LOT. So will the aluminum bellypan!

While your engine mods sound neat, I suspect you'll see more mpg gains from the aero mods - - - unless your going to drive super-slow (which it doesn't sound like you plan to)...