Amazing 33 fuel economy!!

[ALFA33boxer]

Quote:

Originally Posted by ZeNiTh-PbArM Hi, having installed a fuel flow meter on the dash (electronic device computing the product of injection time and engine rpm)

[ZeNiTh-PbArM]

uuuh did not find one so built mine myself! spent some time figurin how to talk to the ECU though...
all the best,
zp

[ALFA33boxer]

Quote:

Originally Posted by ZeNiTh-PbArM uuuh did not find one so built mine myself! spent some time figurin how to talk to the ECU though... all the best, zp

[keith_h]

I've just filled up my sons 33, a single carb 84 1.5 and put 30 litres for 387 km, makes for about 36mpg around town.

Heres a calculator for those struggling with the math: The Fuel Calculator

[keith_h]

From the S1 33 owners manual with my conversions to mpg:

1300 1500 TC
90km 5.5/51.36 5.7/49.56 6.2/45.56
120km 7.9/35.76 7.5/37.66 7.9/35.76
mixed 9.6/39.43 9.8/28.82 10.9/25.92

If anyone can tell me how to format this nicely I will.

[77SudTi]

Not sure if anyone else has noticed this, but I get very different mileages on a tank depending on where I buy fuel. I bought $20 worth from BP the other week and got 200 odd Kms. $20 from caltex gets me 120kms...Fuel quality plays a big part here!

Maybe investing in a 1L can of Xylene to boost octane will be a cheaper option soon anyway...clean your carbies while u drive! (just advance your timing a degree or two)

[keith_h]

Erm, why would you advance the timing??

And you might want to check this out as well: Media Watch: Mileage Misinformation (25/02/2008)

Five identical vehicles, each with a different brand of petrol, set off from Sydney for the Hunter Valley.

But the content's another matter. En route, the expert from Wheels magazine tells us that there's no difference between one brand of petrol and another.

Turns out they all buy and supply petrol from each other.

While we are here, this is a good article on some of these topics including Octane and changes with the new fuels: Technical Article #3

Yes it refers to old Holden engines but since we are talking about old boxer engines I though it was appropriate.

As I noted in another post, I am using PULP (95) which stops the pinging but is less than the RON for leaded fuel previously (98).

[77SudTi]

Quote:

Originally Posted by keith_h Erm, why would you advance the timing??

[keith_h]

OK, got it now. I was just wondering about what you said earlier in case I missed something. I presume then that your car is configured for running regular unleaded.

I run PULP all the time because as you said the regular makes it ping and generally run poorly. But the timing is not set specifically to favour one fuel or the other. The user manual does not specify a grade of fuel so for these earlier cars I presume RON 98 which was "super" when leaded was available. Hence using PULP now which is the closest thing you can currently buy from a pump.

Quote:

Originally Posted by 77SudTi (just advance your timing a degree or two)

[kid808]

i get round 100ks outta 10lts average in my twin carb 85 1.5lt 33 no matter how i drive it doe's seem 2 get better on tha highway though @ higher rev's and doe's any 1 know were i can get a bonet scoop 2 fit ?gets hot here in qld n from experimenting i really think tha car would benifit from it

[keith_h]

Many folks make the mistake of removing the standard airbox because it sounds better or makes the car go better, however that is not the case. The standard TC airbox is engineered to perform and has a cold air inlet that connects around the headlight somewhere which means it takes in air from outside the engine bay if it's all hooked up right. Most of them have had the flexible hose fall off years ago however. I have also removed the thermostat and flap off mine as well.

If you want to go the cold air route, I recommend getting the flexible hose hooked back up but I doubt you'll find it makes any difference. It will save turning your 33 into a Suburu look alike though which can only be a good thing.

Let me know if you want more information.

[ZeNiTh-PbArM]

Hi,

thermostatic flap removal is likey to cause carburetor misting in cold weather. I remember a particular christmas night i had to stop in the emergency lane and manually clean the intake three times in a row...definitely not fun!

regards,
zp

[keith_h]

Quote:

Originally Posted by ZeNiTh-PbArM Hi, thermostatic flap removal is likey to cause carburetor misting in cold weather. I remember a particular christmas night i had to stop in the emergency lane and manually clean the intake three times in a row...definitely not fun! regards, zp