|
|
Browsing this Thread:
1 Anonymous Users
|
|
just put 46mm Z carbs on my a15....... |
|
Home away from home 
Joined: 2006/10/6 1:21
From Midway City, California
Group:
Registered Users
|
and they are phenomenal! so change the tech wiki, because it is VERY possible to put them on a 1200! the throttle response is just ridiculous, and it sounds freakin MEAN! that is all.
Posted on: 2010/8/29 20:05
|
|
_________________
if it was easy to restore, they would call it chevrolet
don't piss off America, or we will bring democracy to your country
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Moderator 
Joined: 2001/5/3 7:04
From 48 North
Group:
Registered Users Contentmaster Usermaster
|
Sounds good, go head and you change the tech wiki. It s not impossible --it's been done before.
Add how you did it and how they work, we all want to know
Posted on: 2010/8/29 23:31
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
No life (a.k.a. DattoMaster) 
Joined: 2004/10/28 11:35
From Geelong, Vic
Group:
Registered Users
|
you sure they were Z carbs, as im pretty sure that they would run like crap on an a15...being that they are jetted for a 2.4 or 2.6 litre
Posted on: 2010/8/30 4:14
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Moderator 
Joined: 2001/5/3 7:04
From 48 North
Group:
Registered Users Contentmaster Usermaster
|
They are jetted to achieve around 14.7:1 at cruise and richer at full throttle.
So they will work on a wide variety of engines. Of course they are not fine-tuned for any engine but the Z. Not even on other 2.4 liter engines will they achieve the exact same results.
Part-throttle response usually suffers when you fit big carbs. But full throttle is usually fine -- as Moises reports.
Posted on: 2010/8/30 4:29
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
No life (a.k.a. DattoMaster) 
Joined: 2007/1/22 23:06
From East New Britain, Papua New Guinea
Group:
Registered Users
|
Has he actually driven with them??
Revs can be sweet with no load and shocking when there is load.
What do you mean by part-throttle response dd?
Posted on: 2010/8/30 4:59
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Home away from home 
Joined: 2010/2/13 1:35
From Ringwood, Melbourne, AUS
Group:
Registered Users
|
I am with Pigdog.
Jetted for 14.7 on a 2.4 or 2.6 is very different to jetted for 14.7 on a 1.2! They will supply a set amount of fuel to match the air i.e. the 14.7:1 mentioned. You change the amount of air (now a 1.2L pump rather than a 2.4L pump) but they still flow the same amount of fuel!
Part throttle and big carb issues is to do with airspeed (too slow usually). Full throttle might be "OK" but I am sure it could be made a lot better with correct jetting!
Posted on: 2010/8/30 5:23
|
|
_________________
Deano
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Moderator 
Joined: 2001/5/3 7:04
From 48 North
Group:
Registered Users Contentmaster Usermaster
|
They won't flow "the same amount of fuel" -- in a carburetor, the fuel flow varies with airflow. So it will vary. I never said it won't work, and I never said it would work perfectly.
At lower part-throttle levels, most likely not enough air over the venturis to work great. The volume is lower than designed for a big carb, you also get inadequate mixing. And carb for a larger engine might be too rich on the accelarator pump.
But the SU design is supposed to be better than fixed-venturi cabs for this.
Guys have put all sorts of large carburetors on A-series and had good result at full throttle. Sounds great too. But does not give the most power for street driving (where you are not driving at full throttle most of the time).
Anyways, let's check with Moisambamf for details... he may just drive with foot to the floor.
Posted on: 2010/8/30 6:00
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Home away from home 
Joined: 2010/2/13 1:35
From Ringwood, Melbourne, AUS
Group:
Registered Users
|
"They won't flow "the same amount of fuel" -- in a carburetor, the fuel flow varies with airflow." That is not correct, what you are saying there is that when I change jets in a carb on an engine that has not been changed in any other way, they will flow the same amount of fuel with the same airflow..? Not true..
I agree just about anything can be made to run on anything but saying it works, unless it is driveable across the whole rpm range (unless specifically designed for a very narrow band of rpm operation i.e. top end), is not correct.
I too would also like a drive report from this conversion but not just WOT, part throttle accel, cruise etc are also vitally important.
Posted on: 2010/8/30 7:23
|
|
_________________
Deano
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
Moderator 
Joined: 2001/5/3 7:04
From 48 North
Group:
Registered Users Contentmaster Usermaster
|
I didn't say that. I said it varies. Even if you change the jets, it still varies with airflow -- as more air flows, more fuel flows. As less air flow, less fuel flows.
Posted on: 2010/8/30 8:02
|
|
|
|
|
Re: just put 46mm Z carbs on my a15....... |
|
No life (a.k.a. DattoMaster) 
Joined: 2004/4/5 6:12
From Brisbane, Narangba
Group:
Registered Users
|
I put a set of 1 3/4" Su's on my A14. Had to fiddle around with needles a bit but once I got it right much much better than the 1 1/2" (38mm) Hitachis that I replaced. Better throttle response, smooth and linear across the whole powerband and the WOT is better again.
I was originally just doing it as an experiment expecting good WOT but less torque and response at lower revs. I was wrong.
Posted on: 2010/8/30 9:27
|
|
|
You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
|