DC2R milage problems etc!! (i.e ASK tinks)

[mecca]

I guess since you guys are in Syd, maybe your temps flux on the freeway. In BNE once the engine is warm my temps stay at just under halfway, regardless of freeway driving or normal driving.

Usual fuel consumption is over 400 km easy, at the moment I am sitting at over 450 km, since I did a bit of free way work. Also from what I hear, DC2 do have a 50 L tank, but I usually only end up putting just over 40 L and that is with the fuel light on.

Hope you sort it out :/

[szymonsta]

i think it may help if you work out your consumption in L/100kms rather than kms/tank as like some of the guys said its difficult to gauge when the tank is empty (unless u drive until u run out of fuel).
just note down your kms at the bowser and how many litres, fill the tank till full, then next time you fill the tank to full again, note the kms and literage again. simple as

as an indicator Motor averaged 12.3L/100kms while driving one hard for a test back in 2001. I average 11L/100kms frequent stop-start daily driving, or 12-12.5L/100kms with the mugen ecu. when i used to live further from work, i could get it around 10L/100kms when driving very sedately.

[tinkerbell]

sooo many guys running busted thermostats!!!

we need to have a thermostat DIY day to get all your thermostats replaced!!!

a cold engine is the biggest contributor to bad fuel economy and soot on rear bar...

[DC2R]

Hmm maybe mines busted then? How do I change the thermostat?

[tinkerbell]

remove air intake tube, remove radiator hose, remove thermostat housing (3 bolts), remove thermostat, replace thermostat with new one, ensuring you replace the thermostat seal too,

replace all parts, refill radiator with coolant, start engine and check for leaks...

now - how to diagnose a busted thermostat:

engine temp will be unstable, getting lower the faster you drive, getting higher when stationary...

the JOB of the thermostat is to restrict teh speed at which the coolant flows through the engine and the radiator,

if it goes too quick, it can cool too well, resulting in lower than normal engine temps (plus the associateed poor running of the engine)

if it goes too slow, overheating will result.

now, the thermostat operates via temperature, it sits in the path of the coolant, and gradually opens as it gets warmer, being fully open around 92ish degree C (aftermarket ones are full open around 82 degrees)

but if it is stuck open (which is usually how a thermostat fails) the coolant will never heat up, and will *overcool* the engine, which will make it run ruch, resulting in poor fuel economy & soot on bumper...

[tinkerbell]

once the engine is warm my temps stay at just under halfway, regardless of freeway driving or normal driving.

this is how a working thermostat should behave, its role is to keep the engine coolant temp as stable as possible, to improve economy and reduce environmental pollution...


and a note to peeps running "low temp" thermostats with a stock ECU - this is the same as running with a busted OEM thermostat.

you can only successfully change an engine operating parameter like its temperature, if you can control all the other paraeters like fuel injectors and ignition timing... otherwise how can you re-tune the engine to run at a different temperature and expect it to operate properly???

[DC2R]

Thanks for writing that up tinkerbell, will get a new thermostat asap.. =)

[fezp]

just got one on saturday. and the guy told me to fill up with water next morning incase the coolant bucket thing was too low. and i forgot. so im gna go check it out now

btw i did do that L/100km.. well actually it was 6.9L or something to the 47km on driving the car like a bitch which is rev past 3 then change gears and only once or twice go past 4k rpms
so yeh.. didn't seem all that great to me. anyway gona give it a week or so with this new thermo and see what results i get.
btw cost me 80bucks to get fitted incase anyone who wants to get one wants to know. 80 with everything, installation, coolant the whole works.

[fezp]

okay it's only a quarter full but i dont know how much i should put or whether i should put any at all.. why would i want to dilute the coolant with water? what purpose will that serve? it doesn't sound all to promising.. but what would i kno im a "noob"

can someone please explain to me why i should do this and how much i should fill it to?

cheers

[tinkerbell]

the plastic overflow bottle is a 1/4 full?

if so, that is OK... wait 2 more weeks then top it up half way with water...

[l3vnd1]

you can only successfully change an engine operating parameter like its temperature, if you can control all the other paraeters like fuel injectors and ignition timing... otherwise how can you re-tune the engine to run at a different temperature and expect it to operate properly???

I agree completely.

Everything is designed to work in conjunction with something else.

If you change the specifications of one thing (for whatever reason), be prepared to start changing everything.

[DC2R]

I agree completely.

Everything is designed to work in conjunction with something else.

If you change the specifications of one thing (for whatever reason), be prepared to start changing everything.

So if i put extractors on my car i have to change everything else?

[l3vnd1]

No but theres a negative associated with every positive; otherwise Honda would have done it themselves.

Extractors may be fine but with a full free flow exhuast you lose back pressure. - thats the negative.

[tinkerbell]

So if i put extractors on my car i have to change everything else?

only if you want the extractors to perform at their greatest level (ie provide greatest increase in performance).

but the subject here is how operational parameters affect milage, not the actual hardware...

so keep it on topic pls

[Haduken]

fark.. I have been getting at least 600km per tank on ultimate/Mobil (Mobil once a month, dont ask me why. lol) 500 if I venture into sweet sweet VTEC.

Do you guys go around 90% of slow corners, roundabouts etc in 2nd or 3rd??. I know in alot of other cars the gear ratio seems to work better going around corners in 2nd, where as in the R its 3rd gear for me.