sunbeamowner
Bronze Level Sponsor
Well do you want the good news or the not so good news ??
I will start off with the good news. I have just converted my 1725 running a hunter GT cam to twin 40mm dcoe (151) carbs from a single 45 mm dcoe. An increase of 20 bhp at the wheels was achieved by tuning on a dyno .
The Alpine has never run so good. It is very drivable in all traffic hot or cold wet or dry.
Now the not so good news. You get what you pay for $$$$. It can take an experienced operator hours on the Dyno to get the jetting right for your particular set up. Did anyone notice the '151' in my carb description ?
Not all 45 mm dcoe webers are the same. Some are made for specific applications like Fiats Alfas etc etc. The '151' is a universal carb that has more scope (different internals) for finer tuning to suit your set up (so my dyno guy says). I originally tried 40mm DHLA Dellorto carbs but even the importer of Dellorto carbs could not supply the jets required to get the right numbers on the dyno.
And don't get me started on 'velocity stacks' and air filters.
I will start off with the good news. I have just converted my 1725 running a hunter GT cam to twin 40mm dcoe (151) carbs from a single 45 mm dcoe. An increase of 20 bhp at the wheels was achieved by tuning on a dyno .
The Alpine has never run so good. It is very drivable in all traffic hot or cold wet or dry.
Now the not so good news. You get what you pay for $$$$. It can take an experienced operator hours on the Dyno to get the jetting right for your particular set up. Did anyone notice the '151' in my carb description ?
Not all 45 mm dcoe webers are the same. Some are made for specific applications like Fiats Alfas etc etc. The '151' is a universal carb that has more scope (different internals) for finer tuning to suit your set up (so my dyno guy says). I originally tried 40mm DHLA Dellorto carbs but even the importer of Dellorto carbs could not supply the jets required to get the right numbers on the dyno.
And don't get me started on 'velocity stacks' and air filters.