How do you eco-drive a diesel ? - Page 10 - Fuel Economy, Hypermiling, EcoModding News and Forum

Piwoslaw · 05-08-2009, 03:10 AM

Quote:

Originally Posted by Vekke

Can you hear you fan during driving? I cant. I should also put light like was it basjoos did...

At first, when I didn't hear it for the first few months, I thought that either it doesn't work, or it's very quiet. When it got warm enough to try the A/C (mine doesn't turn on below a certain outside temp.), I heard the fan, and it's pretty loud :/

A fan LED in the cockpit is also on my to-do list

tasdrouille · 05-08-2009, 10:59 AM

The fans are normally activated when the AC is turned on on my TDI. This is useful to test if the fans are operating properly too.

Piwoslaw · 05-10-2009, 03:56 AM

OK, I opened the part of my grill block in front of the IC yesterday. In the evening we drove to a party, then I gave a few people a lift (since I don't drink), a total of about 100km. The coolant temperature was much lower than when the grill was totally blocked: under 80*C instead of 90*C. Even though 80% is still blocked, what's open lets air onto the radiator. What I'm thinking now is this: if my new grill block will have two independantly openable holes (one for the radiator and one for the IC), then maybe I should add a wall between them, so that air from the IC opening doesn't get into the radiator zone? Unblocking the IC should bring the engine temp down, lessening the need for unblocking the radiator.

consaka · 05-11-2009, 05:09 PM

You want a hot engine? put in a hotter thermostat.. But dont block air access to your intercooler. It will do the opposite of what you want it to do. Diesel fuel does not evaporate and gets injected directly into the cylinder. Gas starts evaporating as soon as its injected, which makes smaller particles that burn more completly.
Diesels run very lean automatically. Gasoline is manipulated to be 14.7 to 1 ratio.
What do you think you are gaining by blocking your radiator on a diesel?
If your diesel has an EGR valve then Im sorry.. EGR was a bad idea for lowering cylinder temps.
My advice if you want to be green and get rid of the EGR is to go with the minimal water injection that you can and block off the EGR all together. It will acomplish the same thing without choking your engine to death.

Piwoslaw · 05-12-2009, 02:33 AM

Quote:

Originally Posted by consaka

You want a hot engine? put in a hotter thermostat.

But I want shorter warm-up times, and a new thermo isn't going to help.

consaka · 06-21-2009, 11:20 PM

Quote:

Originally Posted by Piwoslaw

But I want shorter warm-up times, and a new thermo isn't going to help.

Hmm neither is blocking your radiator going to help. The only real thing you can do to shorten the warmup time is to use a block heater and keep it plugged in.

Face it engine blocks have a lot of mass and it takes a while to get it to running temperature. Well lets see. if you lowered the running temperature then it would get there faster.

tasdrouille · 06-22-2009, 11:03 AM

Grill blocks definitely help the temps going up faster. Here, it makes a big difference when it's -30. Increased EGR is what works best to get the temps up faster though.

ConnClark · 06-24-2009, 02:30 PM

Quote:

Originally Posted by Piwoslaw

OK, I opened the part of my grill block in front of the IC yesterday. In the evening we drove to a party, then I gave a few people a lift (since I don't drink), a total of about 100km. The coolant temperature was much lower than when the grill was totally blocked: under 80*C instead of 90*C. Even though 80% is still blocked, what's open lets air onto the radiator. What I'm thinking now is this: if my new grill block will have two independantly openable holes (one for the radiator and one for the IC), then maybe I should add a wall between them, so that air from the IC opening doesn't get into the radiator zone? Unblocking the IC should bring the engine temp down, lessening the need for unblocking the radiator.

I would add a wall so that you get the maximum amount of air rammed through your intercooler. Also remember that any engine temp drops due to unblocking the intercooler is putting that energy towards moving you down the road.

Piwoslaw · 02-03-2010, 03:31 AM

This may have been already discussed, but there is a thread on ecodriving at my local Peugeot forum, and someone wrote that accelerating with 80% throttle is efficient on gassers, but not diesels. Diesels should accelerate very slowly for fuel economy.
Is this true? I'm using the 80% rule on my turbodiesel and seem to be getting good FE, but maybe it could be better?

Jyden · 02-03-2010, 07:24 AM

Quote:

Originally Posted by vtec-e

I tried blocking up the intercooler a bit on the diesel cee'd but the fuel economy literally tanked. I drove it easy, hard, and both drank diesel like theres no tomorrow. Maybe different brands of tdi behave differently with blocked up/ removed intercoolers. I do agree though, that gentle driving will not have the turbo compressing much, therfore cooler intake air. I can't wait to get something with a 1.4tdi next year....and a scangauge!

ollie

That indicates, at the car/ FE will benefit from a well executed cold air intake