I'm after some advice, I want to improve my 1600, I have a crappy pancake filter on top of my engine and a PO has cut off the mounting bracket for the original air filter box. I fancy a pair of carbs, I have had a look around but haven't a clue what I'm looking for. Has anyone got any advice on what to buy? How do I know if I need cold start bits etc? Do I blank off the pre heat pipes ? I will fit myself and get a rolling road to setup
So its a boggo t1 upright 1600? They will shoot me but keep it standard, stick with the single carb. I know you will get better acceleration with twin carbs but you have keep them tuned, your fuel economy at best will be 18-22 mpg, if you go twin carb you can reduce that further which makes your tank range even more pitiful? Maybe go for a different single carb, which might be less prone to flat spot and give you better acceleration? People dont like autochokes but set correctly they are fine, you can get manual choke conversions but is it such a big deal? Keep it stock, easy parts, reliable simple to fix. I have that same crappy pancake filter on mine, going back to oem oil filter when I get a chance. If you want to think about more power then you can think about getting a bigger engine maybe or even a scooby conversion?
Twin carbs are more fuel efficient if you dont have a heavy foot rebuilt dellortos are considered the daddies along with a bell crank linkage however expect to pay a premium for them
stan, if you're getting 18-22mpg, then something isn't right... you should be seeing 28mpg even nudging over 30mpg on a long run
On a good run I probably get a bit more but I doubt it? I dont trust my petrol gauage to be fair so I cant be 100% sure? I normally get about 200ish miles on a tank.
you need to log your miles against refuels and work it out that way But para is right, twins will give you better mpg, especially once they've been tuned on a rolling road!!
First stage of tuning is remove the inherent restrictions from the manafacturers stock design Twin carbs keep the fuel suspended in the air mix all the way to the combustion chamber Single carbs with long and restrictive manifold drop a lot of fuel out of suspension before it hits the combustion chamber The inlet and exhaust on a stock 1600 are very restrictive however swap your exhaust for a better flowing one Add twin carbs a little port matching and porting and polishing evn some ratio rockers Do all that correctly and get it rolling roaded and you will use less fuel on a long run and have tourqe in reserve for the yorkshire hills Do all that then go for a stroker conversion down the line and you wont belive how much power and torque these old engines can give
I went for Weber 34 ICT's. But i always go back to thinking, I wish I had spent the extra and gone for DRLA36's The ICT's are so much better than the origonal Solex though.
I liked my icts and got 30mpg on a run with them, if you gop down this route make sure you get a good linkage like the belcrank one from CSP. I have now have gone back to a weber progressive and now it's set up well i think it's better!
Para's right - twins are going to work much better and likely give you better fuel consumption. The single carb on a T-shaped manifold is a bloody awful arrangement on a flat engine (but ok if you want to stop German van drivers thrashing their vehicles). ICTs are basic, but ok, and will be better than a single. Dells are the peak of carb design and aren't that pricey.
I'm pricing up some dells at the moment, thanks for all the input. What happens to the breather pipe that goes into my current filter? Also I don't see where the feed to the brake servo connects ?
i got dells 40's for my 1600 last year to try to 'future proof' it a bit i.e. if i decided to get a bigger engine in the future i wouldn't have to fork out for twin carbs again. that future decision came around quicker than i thought :/
Iv'e got a 1600 engine as well (but am engine numpty) ..... Would love a little more power + better fuel economy to summarise and correct me if i am wrong.. Dell'Orto better than Weber but much more expensive 40's better if going to upgrade engine at some point (Q...? if not ? 34?36 adequate ) DRLA better than ICT (Q..? What about IDF/IDA?) Weber dual 34ICT about £350 Dell'Orto dual DRLA40 about £800 + extra cost ....Fitting, new exhaust/manifold & rolling road (Q .. ? cost) Seems like an expensive upgrade esp if go for a Dell'orto ? Worth it and ?? worth going for the Dell'Orto Thanks in advance
I've a pair of 'Baby Dells' I had on the 1600 Devon (along with electronic ignition and stainless quiet pack). Ran really well and they are now sat in a box in the garage. In the Westy I rebuilt the stock german carb (including the brass bush), along with a stock exhaust and electronic ignition. The Westfalia is a MUCH heavier vehicle and runs great. Bit of a slog on the hills but returns great MPG. I must be getting old...although I'm just back from a week in Arisaig and perhaps a bit more poke on the hills would be good! I've also got a 2.1 stroker with 'slightly' larger carbs sat in the back of the garage....might be fun ;-) Not sure about the MPG on 48 DRLA's though!
