It will be used as daily driver (mainly city driving).
Cheers
Raf

No - ish

out of the box i think the answer is yes.
If you go to

http://www.lowbugget.com/ 

AJ has some update kits.

I think ovalglen is running a 1916 with a single pict.
You may find it just runs out of oomph at like 4000 revs

i think it all depend on your valve size, cam (and intended rev range), etc.
i think with standard valve heads and a smaller cam (hence lower rev's) they should be ok.
i think you might need to go up in the main jet size. i was told (on my mild 1776) to go from standard 130 mains (i think) to 135 mains. i was told this size was ok for 1916's (well pobjoy baseline 1916)(it was stan who suggested the jet size to use for my engine).
as for reving on my motor, i saw the needle well past 90mph... ahhhh ...well more than once
if someone wants to work out the revs it was with a standard late 6V gearbox and 165's with the needle past the first light (it was the oil light on my car) with 145 front tyres.

[Edited on 21-3-2003 by whatnow]

NO THEY ARE NOT TOO SMALL

Twin Kads on a 1916 is the setup Stan Pobjoy uses for his stage I engine.

If you're not sure of anything, or just want a really long chat, give him a call.

02 6650 9616

I think you'll find that straight out of the box they used to bolt straight up to a 1600 without re-jetting. But since the fuel quality and composition changes you do need to spend some time to set them up properly. Guys like AJ Sims and Stan Pobjoy have done a lifetime of R&D. Ask and you will find out what you need to know.

hey
thats right steve u set them straight!!!!
kads are "the best" carby around if u dont wont to after every drive tune ur carbs so it runs at optimal performance!!!!
my bros pobjoy runs kads and they pull bloody great!! never any shortage of power!!!
cheers
rhys

I agree unequivocally,or so ive heard.:thumb

he he he he

Thank you Lugnuts!

Yeah, Kads are fine on a 1916, especially for a daily driver. BUT make sure you get the jetting attended to - I think 140s are required for a 1916. I've had mine for so long, I can't remember! Ask around: Who did the engine? What cam?

Oh, and you need to adjust the accelerator pump stroke, too. This must be done with tye carbs off the car. It's very simple - a small plastic jobbie must be screwed along a thread so that it allows the pump to move a certain distance, therefore activate the pump to supply a squirt of fuel to the engine. Moving the little jobbie provides different volumes of 'squirt' depending on engine capacity. Oh, and sorry, I can't remember those dimensions, either...

barry
they are a nice simple carb and with minor jet alteration can go as good as some webers etc
dont wont to start an argument but can someone just confirm that has webers etc how many toimes they have to adjust them to run full performance out of them???
thats why they suck!!!
i must admit they do sound way better and do like the juice u feed them!
cheers
rhys

I'll agree that Kads are a simple carb, that's what makes them so easy to use - a good set can be thrown onto a stock engine for a nice lift in performance. The reason Webers are so much harder to set up is that they are a far more sophisticated carb - but, once you've got it right, they'll outperform the Kads every step of the way. The problem in Oz is finding the jets and someone who can jet them for you... - learn how to do it yourself! It might take a few weekends once you've learnt what you're doing - but what fun weekends they'll be!!!

In the old days, many used to say it was impossible to get a Holley Bugspray to work properly on a VW; but I evetually got mine running fantastic! The longest part of the process (even longer than learning how to jet my own carbs) was finding the jets - most "Holley experts" I talked to didn't even seem to know what a jet was!

Once you know how to set them up, any carb can run on any engine. The best carb will, of course be of an appropriate throttle and venturi size (beware, there are limits to the useful ratio of venturi to throttle size if you want to do anything but peak revs.) There is no easy answer to this as cam, exhaust and heads can affect what the ideal size is. Some have tried to come up with formulae, but most engine-builders still rely most on "suck it and see."

As experts like Pobjoy and (Gene) Berg found: - stock(ish) Kads can be really nice on a street engine up to about 1916, jetting will probably still be necessary on any modified engine to achieve peak performance (and is also necessary on some cheap kits.)

this is easy.
if u have a big cam and big valved heads the kadrons seriously limit perfomance.
for your street motor they will be fine

As with everything, if you modify it enough, it can suit just about every application - see AJ simms web site, 176hp with twin kadrons...... Albeit they are massively modified, but still the fact is they flow enough air and juice to make those numbers.....

If you do get some, try and get the new kits with alumium manifolds, the old ones have steel manifolds with very little scope for ported heads, or match porting either for that matter. Secondly, if you do get the ally ones, make sure the gasket faces are flat (same as with any manifold really) as curvature can cause air leaks.


[Edited on 24-3-2003 by Doug Sweetman]

Yeah, AJ Simms has done some pretty amazing stuff - http://lowbugget.com/main_page.html 

But, for street use, we must remember the Venturi is there for a reason - it increases air velocity (hence vacuum at the nozzle) in order to make the carb work at a greater range of rpm (without it the engine would only run well at max RPM and power.) For what AJ's mods would cost shipped down under, I think it would be wiser to invest in a larger set of carbs when you're engine reaches the limit of Kads. It is true Kads will run out pretty quick with strokers and radical cams - but I meant in no way to diss them within their capabilities.

you can run a stock carb on a 1915 if you want to.

Kadrons will be fine, but the power will start dropping off earlier in the RPM range than if you have Webers (but only providing your heads/cam will flow enough to use the extra capacity of the webers).

Rhys, don't listen to what people tell you, most of them are wankers. Find out for yourself. The whole "you need to tune webers all the time" saying is crap that people that can't afford webers say to make themselves feel better about not having webers.

Webers were used on many exotic standard cars, if they magically went out of tune they wouldn't have been used.

I used to take my car offroad all the time, in horribly dusty conditions, and my webers didn't fall out of adjustment. I rarely touched mine. In fact there was no difference in the frequency I adjusted my webers or my kadrons.

They is no reason for a carb to go out of tune. In fact it is impossible. You can however have jets block due to poor air/fuel filters, this does happen more easily on webers because the idle jets are so small. Just use a decent fuel and air filter. The other thing that can happen is the cheap linkage sold with a lot of webers can flex and wear when abused. This is a linkage problem and not a weber problem. Just use a decent linkage.

Webers have the potential to make twice as much power as kadrons, for the simple reason that they are twice as big and therefore flow twice as much. However you will only see that extra power if your engine can also flow as much air as the webers, or at least more air than the kadrons.

I think kadrons are excellent value for money, but no match for webers for outright power.

Different horses for different courses.
I have a big cam in my 1916cc, but standard heads.
I have standard Kads, with no changes to the jets.
This is a great daily driver.


But as always the case i want more power :P

James, I am asking because I want to use my Kads on the 1916 I bought off you. What was on it before and how did it run?
Raf

That engine had bigger carbs 40mm idas or idfs i think.
Was no quicker than my 1916cc with twin Kads.
You will find the heads and cam will make it pretty much pointless running Webbers or Delortos, and unless u can pick up some cheap, cheap ones i would stick with Kads.
Carbies are getting stupidly expensive.
The Kads will run 99% as well on that engine as any other carb.
If you dont intend on upgrading the heads, or working them, definately stick with the Kads Raf.

Oh - and the Kads are a better (more progressive) carb for daily driving.