32/36 Weber Dgav On 4k-c

[zilli]

Hey fellas,

 

Ive just bought a brand new Redline 32/36 weber carb from eGay, brand new in the box originally to suit a Honda motor...

 

What i want to know, is where i can source an adaptor plate to suit, and just some thoughts from anyone here who has done it before, i think itt is a electric choke from the research ive done...

 

Anyone who has done this before, can you chime in with some thoughts or info on How to, or what to look out for?

 

Thanks fellas

[DR1FT]

Hey fellas,

 

Ive just bought a brand new Redline 32/36 weber carb from eGay, brand new in the box originally to suit a Honda motor...

 

What i want to know, is where i can source an adaptor plate to suit, and just some thoughts from anyone here who has done it before, i think itt is a electric choke from the research ive done...

 

Anyone who has done this before, can you chime in with some thoughts or info on How to, or what to look out for?

 

Thanks fellas

i no you can get the adapter plates from eBay as well mate.

[zilli]

thanks, i think i was searching for intake manifold instead of adapter plate on Ebay.

 

Interested to see who has done this before and the challenges you face with it... and where i buy the appropriate jets from

[bLinded_]

Hey mate,

 

I have a 32/36 on my 4K currently and it was pretty easy to rig up. You can get the adapter plate from ebay for like $30 or so, or probably also be able to order it from repco or anywhere that can get Redline parts in. Also, the adapter plate for a K series manifold is exactly the same as a Datsun L series one, so if you see one of those on ebay, it'll do the same thing :)

 

When my old man and I put the weber on, it was pretty straight forward. The only problem the throttle linkage as the one that was on the Weber when I got it had a mechanical linkage(for a Datto), not cable. Bit of metal and a welder fixed that easily enough and from there just had to hook up the vacuum lines/fuel. Also, i needed to make a mount for the cable to fix to, so again some metal and a few welds fixed that. Apart from that, there wern't any problems that I can recall.

 

As far as jet sizes go, mine is jetted for a 1.6 so it runs a little rich on the 1.3. I should get it rejetted, however, I am lazy, and I have other plans for the engine so at the moment it is going to stay that way :) I don't know what it is like for you, but where I live, there are no places in town that do Dyno tuning, so it makes it a bit difficult to work out what jet sizes to get, and when they are $10 a pop for a jet, trial and error becomes a little expensive. I believe though, that you can buy a jet drilling kit which allows you to experiment a bit with different sizes w/out having to buy each jet. Apparently you just block a couple of mains/air jets with solder and drill it out with what ever size you want, and, if you get the wrong size, just re-solder and redrill with another size.

 

 

Hope this helps. If not, I'm sure someone else with more knowledge can fill in gaps. :)

 

-Alex

[DearmanKE]

hey alex

 

does your weber guzzle much fuel on your 4k seeing as its jetted for a 1.6?

 

how much of an improvement over standard carby did you find?

what did you really notice?

just wondering coz I'm not sure if i should go weber or not

 

-Alex

[zilli]

Hey mate,

 

Thanks a LOT for the awesome information, and most of all for replying, doesnt seem to be rep points on this site, i'd add some if i could.

 

I actually brought a brand new in the box redline weber, so it comes with all of the jets included (got it all for a STEAL), so in terms of experimentation i should be able to do all of that, if it's easy enough to do. The only issue is i don't have access to a welder so i may need to improvise somehow.

 

I know very little about carbs and setting them up... so was it hard to set up the mixtures and all that sort of stuff? i would presume that the kit i have brought has some sort of diagram to tell me where everything is...

 

I'm also interested to find out if it affected your fuel consumption and or performance? I'm leaving the car stock for the moment otherwise

 

Cheers mate

[Felix]

32/36 webers are designed for 1.8-2.0L motors.

 

On a stock 3k or 4k, you would be better off rejetting a standard carb and fitting a sports filter.

[zilli]

32/36 webers are designed for 1.8-2.0L motors.

 

On a stock 3k or 4k, you would be better off rejetting a standard carb and fitting a sports filter.

 

 

so is it not possible to put the appropriate jet in the weber to ensure it doesnt run rich... are you saying ot cannot ever be tuned to run right? ive read around the place that you get bogging and flat spots.

[Felix]

You can jet them to run reasonably, but the idle, progression and low to midrange operation will never be as good as a properly sized carb. Yes, expect poorer fuel economy, bogging and flat spots.

 

The thing is carbs operate on the vacuum signal from the motor. A 1300cc motor isn't going to suck as hard on the carb in the lower rev range, as what a 2L motor does.

[zilli]

So overal performance SHOULD improve though, at the expense of granny drivability

 

correct?

 

even the stickies say this is the appropriate upgrade once jetted properly...

Edited April 17, 2008 by zilli

[Felix]

Not really. I've had a 32/36 on a stock 4k many years ago, which I played around with jetting a fair bit. It seemed to go a bit harder in the top end, but as I said, you lose low to midrange at the expense of increased fuel economy. Just think about the rev range you use in normal driving, which is where you spend most of your time.

 

A rejetted stock carb with sports filter gave better "overall" performance.

 

The rule of thumb for carbs is you want 2 to 2.2 cfm per hp. A 32/36 dgv has about 230 cfm of flow, so it is best suited for motors producing 105-125 hp. A stock 4k is a long way short of that. Save the carb for later on down the track if you fit a worked 5k.

Edited April 17, 2008 by Felix

[bLinded_]

does your weber guzzle much fuel on your 4k seeing as its jetted for a 1.6?

 

how much of an improvement over standard carby did you find?

what did you really notice?

just wondering coz I'm not sure if i should go weber or not

 

Fuel wise, it doesnt seem to use much more than what the standard carb did. That being said, the original carb on my engine was f@$ked, so yes it was an improvement from what I had. While it doesn't make the car "fast as", replacing the old carb with a $50 Weber has made a pretty noticeable difference to me. The old carb would flat spot badly in any rev range, no matter if it was warmed up or not. While the Weber still has a little flat spot if I boot it below 2000rpm due to it running rich, it is still 10x better than what I had, especially for how little it cost and easy it was to install. I don't have any problems with it idling, it sits nicely on about 900rpm when it is warm and a little lower when cold(6:30 starts etc :( ) The only problem I did have to do with idling was from a little bit of broken off corrosion blocking the idle jet, but a bit of carbie cleaner fixed that and from there I havnt had any issues.

Not really. I've had a 32/36 on a stock 4k many years ago, which I played around with jetting a fair bit. It seemed to go a bit harder in the top end, but as I said, you lose low to midrange at the expense of increased fuel economy. Just think about the rev range you use in normal driving, which is where you spend most of your time.

 

What Felix said is pretty spot on. My engine with the 32/36 makes 6000rpm alot easier than when I had the stock carb, and due to being rich I loose low end power. I can't say for sure, but I am pretty sure that with the right sized jets/chokes/venturis/what ever else is inside of the carb, a 32/36 can work pretty effective on a 4k. But, I guess getting it it perfectly set up would require a dyno and a fair bit of $$$.

 

It is up to you if you want to go to a Weber or not. Personally, I think that if there is nothing wrong with what you have, then it is not worth changing to a 32/36. However, if you have the time to experiment or, have the money to get it jetted/tuned correctly, then go for it, chances are you might like it better. Also, the weber sounds alot better than the original carb :o

[Raven]

Try changing your venturi's to 28/34 :(

[Felix]

Try changing your venturi's to 28/34

 

You can't. You mean changing the carb bores, as in use a different carb. :(

 

I can't say for sure, but I am pretty sure that with the right sized jets/chokes/venturis/what ever else is inside of the carb, a 32/36 can work pretty effective on a 4k. But, I guess getting it it perfectly set up would require a dyno and a fair bit of $$$.

 

A 32/36 has cast in venturis of 26/27mm which are not changeable.

 

You can get a weber 32/32 DGV (from Escort 1.6 ghia) which has 23/24mm venturis which works way better than a 32/36 on a K series motor. Another good carb for K series is a 32ADFA (32/32 with 23/23 mm venturis) Found on a Fiat 1600s. The only weber downdraft carb (apart from IDF's and IDA's) with changeable venturis is the 28/36 DCD, which can be tailored to suit motors from 800cc to 2300cc. The DCDs can be found on Mk1 cortina 1500GT's and Fiat 1500's.

 

I have a pretty healthy 5k and I wouldn't even consider a 32/36 DGV. I run a 28/36 DCD (26/27 venturis) on mine and love it. With the previous worked 4k, I ran 25/25 mm venturis in the DCD. I also ran a 32/32 DGV on it for a while and it worked really well, but wasn't as tunable, nor were the mixtures as stable as with the DCD.

 

A great tuning aid for carbs is a cheap 4 wire narrow band 02 sensor, with a bung welded into your exhaust, coupled to a DSE/jaycar FMD meter. That is what I have setup on my ke15 and cost under $100. Though I need to rewire it under the car as I ripped the wiring out one day driving along a bush track.

Edited April 17, 2008 by Felix