THanks fellas, just seeking the same as everyone else here... More Power!! My thinking was to put the bigger jets in to maybe combat the starvation in low revs, now that I have done the secondary mechanical link...
....Just need to find the next size up in the secondary jet now (and maybe the primary too!!)....
carby's
The numbers are stamped on each jet, just increment upwards by 10 and you should be fine.
I'd check your mechanical linkage too, especially if your engine is hesitating or feels sluggish through low/mid range rpm when driving. Thats a sure sign that the secondary is either coming on too late, or too early. It might not have anything to do with the jets at all.
I'd check your mechanical linkage too, especially if your engine is hesitating or feels sluggish through low/mid range rpm when driving. Thats a sure sign that the secondary is either coming on too late, or too early. It might not have anything to do with the jets at all.
F8B EFI turbo - Three pots and a snail.
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pullbackandgo
- Posts: 89
- Joined: Tue May 11, 2004 2:23 am
- Location: Newcastle
Yeah, it's coming on too early, but the spring I'm using is all I could find at the time... I wasn't saying that the problem was the jets, I was saying that they might help.
Are the jets universal? Or do I need to get specific ones for the mikuni??
Other than Suzuki(slow slow slow) who else would stock them or could get them for me??
Thanks guys, y'all still coming to newy for october long weekend??
Are the jets universal? Or do I need to get specific ones for the mikuni??
Other than Suzuki(slow slow slow) who else would stock them or could get them for me??
Thanks guys, y'all still coming to newy for october long weekend??
Yeah should be there, pending getting the engine and wombat damage fixed up. 
Jets are pretty much universal, any carby specialist should be able to order you a set in whatever size you want - but they usually aren't cheap for what they are!
If I'm reading into this correctly, you're saying that your secondary is spring loaded? So it just kicks right open when the primary throttle opens up to a certain point?
A linkage from the primary to secondary needs to be progressional to work properly. As you apply more throttle the secondary should open slowly at first, then fully towards the point of maximum depression of the accelerator cable. Barry (a past TAMON member) made such a linkage, and he went to a great deal of trouble doing measurements and working out the best solution. I'll have to dig up some pics of his setup.
Jets are pretty much universal, any carby specialist should be able to order you a set in whatever size you want - but they usually aren't cheap for what they are!
If I'm reading into this correctly, you're saying that your secondary is spring loaded? So it just kicks right open when the primary throttle opens up to a certain point?
A linkage from the primary to secondary needs to be progressional to work properly. As you apply more throttle the secondary should open slowly at first, then fully towards the point of maximum depression of the accelerator cable. Barry (a past TAMON member) made such a linkage, and he went to a great deal of trouble doing measurements and working out the best solution. I'll have to dig up some pics of his setup.
F8B EFI turbo - Three pots and a snail.
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pullbackandgo
- Posts: 89
- Joined: Tue May 11, 2004 2:23 am
- Location: Newcastle
Lets see if i can explain it with some sort of readability... The primary butterfly is opened by that little wheel the accelerator cable is connected to, it has like a torsional spring on it to make it spring back. Behind the wheel that operates off the accelerator cable is another little wheel that only operates once the primary gets to about 1/2 open. This is the part of the primary I connected the spring to.
So really, the secondary only opens after at least 1/2 throttle, and it's progressive just like the primary. It still struggles when you dump it because it will open the secondary fully, so you get way too much air for such low revs and strangles the engine sort of thing. (Sorry...it's 1am in the morn, so I'm having trouble explaining myself coherently!!)
In other words, unless you booooot it you can get away with it like this. And you can still putt around without pushing the throttle past 1/2 and the secondary won't even get used.
I'm happy with it!! And I'm currently in negotiations with my mechanic about getting my jets drilled, or possibly getting new ones for about 10bucks a pop from some mob in burwood. Either way, I'm interested in how the new jets will effect the running of me carby.
Enough out of me...
So really, the secondary only opens after at least 1/2 throttle, and it's progressive just like the primary. It still struggles when you dump it because it will open the secondary fully, so you get way too much air for such low revs and strangles the engine sort of thing. (Sorry...it's 1am in the morn, so I'm having trouble explaining myself coherently!!)
In other words, unless you booooot it you can get away with it like this. And you can still putt around without pushing the throttle past 1/2 and the secondary won't even get used.
I'm happy with it!! And I'm currently in negotiations with my mechanic about getting my jets drilled, or possibly getting new ones for about 10bucks a pop from some mob in burwood. Either way, I'm interested in how the new jets will effect the running of me carby.
Enough out of me...
That sounds okay mate, its was just when you mentioned that the secondary was spring loaded that I had this vision of the primary throttle opening to about 1/2 way and then the secondary being sprung straight
open.
I was going to suggest that you drill your current jets, but the problem there is that it is harder to go back once you've done that!
$10 a pop for jets doesn't sound like much till you start to mess with webers and have to order about 10 jets to work out the right ratios. 
open.
I was going to suggest that you drill your current jets, but the problem there is that it is harder to go back once you've done that!
$10 a pop for jets doesn't sound like much till you start to mess with webers and have to order about 10 jets to work out the right ratios.
F8B EFI turbo - Three pots and a snail.
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pullbackandgo
- Posts: 89
- Joined: Tue May 11, 2004 2:23 am
- Location: Newcastle
I'm just getting 5 up from the ones already in it. So the primary will go to 97.5 and the secondary will go to 170.
Hopefully I'll only need the one set of jets to give me a bit more oomph!!
Guess we'll see what happens, I ordered the jets today, so I'll post when I get them in the car and up and running...
Hopefully I'll only need the one set of jets to give me a bit more oomph!!
Guess we'll see what happens, I ordered the jets today, so I'll post when I get them in the car and up and running...
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pullbackandgo
- Posts: 89
- Joined: Tue May 11, 2004 2:23 am
- Location: Newcastle
Installed the new jets this mornin. No such power gains yet, but still need to get my hands on a timing light so I can advance it a bit. Any ideas how much?? A few degrees? So maybe take it from 7degrees BTDC to 9? Or do I go the other way to 5? The jets have helped though in getting rid of the secondary stavation in low revs. Primary jet was a B.I.T.C.H to get out! It was seized, ended up mashing it up pretty good.
The secondary spring operation is pretty simple, it's just a matter of finding the little post that is attached to the secondary butterfly wheel and hooking the spring over that. Then on the primary wheel there is a little tab towards the bottom on the inner wheel that the other end of the spring needs to be hooked over.
Make any sense??!!
Trying to explain it as best as I can, but it's hard to without being able to just point here and there on the car and say "put it here."
But all in all it's definately worth giving a shot!! I'm happy!
Spun the wheels in the wet yesterday in THIRD!!! Also ended up on the wrong side of the road after doing a 180. No other traffic around being 7.30am sunday morn in cardiff industrial estate. LUCKY.
Last bit of info, over the last couple of days I painstakingly put two racing stripes down the middle of my hatch with black contact. Looks the shit, still goes like shit, but at least it looks hell!! I'll put up pics when the weather gets better...
The secondary spring operation is pretty simple, it's just a matter of finding the little post that is attached to the secondary butterfly wheel and hooking the spring over that. Then on the primary wheel there is a little tab towards the bottom on the inner wheel that the other end of the spring needs to be hooked over.
Make any sense??!!
Trying to explain it as best as I can, but it's hard to without being able to just point here and there on the car and say "put it here."
But all in all it's definately worth giving a shot!! I'm happy!
Spun the wheels in the wet yesterday in THIRD!!! Also ended up on the wrong side of the road after doing a 180. No other traffic around being 7.30am sunday morn in cardiff industrial estate. LUCKY.
Last bit of info, over the last couple of days I painstakingly put two racing stripes down the middle of my hatch with black contact. Looks the shit, still goes like shit, but at least it looks hell!! I'll put up pics when the weather gets better...
Going to 9 degrees BTDC would be retarding the engine further. Drop it down to 5 and see how it goes.
Its easy to hear the MB motor knocking/pinging, so I tend to just tune by ear - wait till it pings and back it off a degree or two.
Its easy to hear the MB motor knocking/pinging, so I tend to just tune by ear - wait till it pings and back it off a degree or two.
F8B EFI turbo - Three pots and a snail.
...however, when tuning by ear, ensure you listen to the engine right through it's rev range, as it's easy to adjust timing at idle in this fashion - resulting in monster torque and excellent pickup - but the instant the auto-advance starts to kick in, you'll be pinging all the way to burnt pistons!
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Whoops! In my mind I was thinking about how I do it, but should have mentioned what Josh has just said. 
F8B EFI turbo - Three pots and a snail.
s'all goood buddy 
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pullbackandgo
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Just pondering today, what would happen if I just removed the secondary jet altogether??
Cause I was thinkin, there is only a small tube thats drilled out that runs from the jet to the venturi. Figuring it might be a bit rich though... or flood.
Cause I was thinkin, there is only a small tube thats drilled out that runs from the jet to the venturi. Figuring it might be a bit rich though... or flood.