Thread: Holden 202 fuel consumption

My 2A has a 179 with hi-comp heads. Its not too bad on fuel but you need to put 98 in her otherwise she pings like a be-arch. But it will do about 20mpg.

not a 202 fan--the 3300 block and crank are a betterversion.
if spending money I look at 179-186 or 2850.I like the 12 port head.

the build quality of production engines can vary a lot.often on worked on commodores that could just get 8 km/l and others that easily did 12 km/l.

the last carby 6 had a varijet that are dead simple to work with.
nobody wants to adjust these and call them crap.
the primary is small with throttle pump,high speed bleeds and choke-to give drivability and the seconday is SU like for ecomomy.these are by far the best on fuel other than the su type carby or a throtte body injection.
the VK EFI commodore wasnt good on fuel with the original computor as it was set up to give XU1 tripple carb power and good emisions.
the engine design is similar in technoligy to the different ages of rover/leyland V8 except they are not cross flow.

the older pre 75 holden's are low geared-and under exhausted.most people forget that even the wheels are smaller.torana-hr had 13 inch wheels,1968 to early 80's had 14.[15 inch low profile rolling dia is smaller than the 13 inch wheels].torana and VB had 2.78 to get the gearing back to 3.36 comparison.throwing an overdrive manual improves fuel ecomony heaps.

Emision levels raised over time,and they are being measured over distance,the gearing needed to be raised,holden for some reason use very low gearbox ratio's to reduce NOX when starting off-in doing this they retard ignition timing with the fuel mixture rich.
sometimes lowering the ratio improves the economy if you change the cam-distributor and carby.

single barrel stomberg is cheep--the small throttle gives good drivability with a holden car in a shopping center and cruise is good..a few conversions i worked on had the original landrover or other leyland 1-3/4 single su fitted.the muffler tube manifold adaptor on the original manifold horrified me but worked ok.i saw a alloy cast adaptor in a 70's magazine.

I recomend a 186S style manifold as a minimum.these use a 2 barrel stomberg that is smaller than a holley 350.[280 cfm aprox].i like the ford style webber and with it you could use a landrover intake.

holden likes a 2 engines pipes if you cant fit tuned extractors.