who's got a weber on a sierra

Post by **built4thrashing** » Thu Oct 21, 2004 8:21 pm

just wanna find out who else has a weber on their 1.3 zook. and what do ya think of it

Post by **leafyhead** » Fri Oct 22, 2004 9:09 am

I have an 86 sierra on my property that has a weber and i cant really find any dramas with it.Other people have said starvation of fuel on uphills etc but i go up and down hills 20 degrees to 35 degrees and back down with only valve stem seals letting oil into the cylinder causing a bit of smoke.I also have 92 soft top with standard carb but horses for causes i really cant pick the differance in power or pickup as im over 40 so iam pretty sedate.

Post by **built4thrashing** » Fri Oct 22, 2004 8:00 pm

ya wouldnt mine opening up the weber and letting me know what size jets it has? my jets are wrong for my setup.

Post by **bazooked** » Fri Oct 22, 2004 8:13 pm

did u get my pm?

Post by **leafyhead** » Mon Oct 25, 2004 7:18 am

Built4thrashing, didnt read your post till now and after what i said in previous post i had the uphill flooding problem on the weekend.Stuck in creek trying to go up bank \,light throttle,stalled,then about 6 or 7 times it started and black smoke and missing.So now i know what not to do.

Post by **purefmx** » Tue Oct 26, 2004 6:48 pm

32/36 DGV, fixed all my incline problems!

Post by **built4thrashing** » Tue Oct 26, 2004 8:30 pm

hey what are ya running for an air filter?

almost got mine sorted out. have had probs with airbox adaptor i made restricting air flow. hey purefmx what jets are ya running?

Post by **purefmx** » Wed Oct 27, 2004 3:28 pm

Jets-unsure, im still running the std weber filter i.e: Lynx etc its currently getting replaced as soon as the airbox is finished.

Post by **built4thrashing** » Wed Oct 27, 2004 8:50 pm

have you had carby tuned or just did a strait swap over and if so what was it off?

Post by **OldGold** » Thu Oct 28, 2004 6:53 pm

interested as to how these webers go, the stock carb is too complicated for me!

Post by **built4thrashing** » Thu Oct 28, 2004 9:39 pm

there is a huge power difference if you use a open type air filter (ramflow) if using the standard airbox then the adaptor for the carby to it can make a huge difference. the air has to come onto the top of the carby and not across it. otherwise the primary barrel will take all the air and will dog down when secondary opens. also you need to down size the jets if running the stock airbox. once mine gets tuned properly ill do a full post on all jet sizes, and adaptors needed to do it. fittments

Post by **built4thrashing** » Sun Jun 19, 2005 9:58 pm

just wanna reopen this discussion to see if anyone else has gone down the weber path. if you have post ya thoughts and setup for others to read.

Post by **JrZook** » Sun Jun 19, 2005 11:23 pm

Yes this will be very helpful specially when your on the path

Post by **bennybigballs** » Sun Jun 19, 2005 11:33 pm

no more

Post by **bennybigballs** » Sun Jun 19, 2005 11:34 pm

Post by **alien** » Mon Jun 20, 2005 12:38 am

i run 32/36 DGAV on mine, allbeit with a 1.6L vit motor, but the difference was ENORMOUS compared to the std carby... flooding uphill aint too bad, most of the terrain here you're only on that kind of angle for a brief time before coming down again anyway. ive noticed it doesnt occur till i pass 45 degrees or so, drops to hunting at 300-500rpm and stinks of fuel =)

i run the big fat round air filter right on top of the carby - bit scary when going in water, but generally ok if i take it slow =) im sure down the track an airbox to snorkel will be required.

Post by **built4thrashing** » Mon Jun 20, 2005 8:40 pm

hey alien. if you run a ramflow filter you will get better response and power as the weber is designed to draw air straight down into it not up and over the choke housing. they cost $50 but are worth the $$$.

Would you know the sizes of the jets you are using? (idle ,main and air jets).

the way to fix the flooding issues is to run the carby backwards with the float closer to the fireway. this way it will only flood on steep downhills or when stopping really hard.

Post by **alien** » Mon Jun 20, 2005 9:34 pm

hey dude - no idea what the jets are - i was that sick of the stocker i gave the zuk and the $$$ to a carby expert and said "go"... hehe

yeah i know of the backwards trick, maybe if it realllly annoys me but right now its not an issue =)

oh and it MEGA leans out under heavy braking... sometimes as low as 200rpm for a few seconds after stopping!!! that said im running vit rotors n calipers so i does stop rather fast compared to stock.

Post by **DiddyZook** » Tue Jun 21, 2005 7:07 pm

I have a 32/36 with 'RedLine' filter (the round one with chrome top) on a 1.3L in a 1989 Sierra. No I do not know what size the jets are (but they work fine).

I am going to set up a snorkel on this Zook. Is there an adaptor for the top of the carby? If so, any idea of price?

I have an old stock set-up with the filter box inline, I am considering using this between the snorkel and the carb, only bit missing now will be something to sit right on top of the carby. Thinking about making up a box, sealed with a larger hose feeding in from the snorkel.

Post by **SiKiD_01** » Tue Jun 21, 2005 7:36 pm

DiddyZook wrote:
I am going to set up a snorkel on this Zook. Is there an adaptor for the top of the carby? If so, any idea of price?

i have been looking for one of these for the past 6 months. haven't had any luck.

i've decided to draw up some plans and measurements, and get the local aluminium engineer guys to cut, bend, and weld it up for me. i figure it will cost almost the same as the adapter we are looking for.

Post by **built4thrashing** » Sun Jun 26, 2005 1:16 pm

ok ive been playin about with the weber again after reading a few discussions on some US forums. ive changed the settings again and its heaps better. this is what iv done
mount the weber backwards with the float closer to the firewall.
set the float properly to 41mm and 51mm (this is very important to tuning the jets)
read the info in the suzuki download archive on how to do this.
your auxillary venturis should be 3.5 prim & 4.5 sec
emulsion tubes are F66 primary & F50 secondary
idle jets are 60/55 (primary is still a bit small need to try a 65 or 70)
main jets are 130/127
air correctors are 170/160.

set your baseline tune and ya should be pretty close to the mark.

these work well on mine. my set up is ; stock engine and exhaust manifold with 2inch exhaust. stock airbox with finer filter and snorkel. inlet manifold has been ported out where carby mounts to allow better air flow. If your going to use an after market aircleaner & filter get the lynx ramflow filter. this allows the air to get sucked straight down into the carby like it was designed to do. the round/ rectangle crome filters are ok but restrict air. Same applies when adapting your stock airbox.

here are a few links that contain a heap of good info and if anyone has any others please add them.
http://www.suzukiinfo.com/sierra/weber.zip instructions on installing a weber on a zook
http://bbs.off-road.com/ubbthreads/show ... art/1/vc/1 is a toyota discussion but the info also applies to suzuki's
http://www.racetep.com/webjettune.html just a general weber site
http://bbs.zuwharrie.com/content do a search here and take notice of anything SARGE writes. he a weber guru

Post by **built4thrashing** » Sun Jun 26, 2005 1:47 pm

hey DiddyZook this is how i connect to the weber from the stock airbox

Post by **DiddyZook** » Sun Jun 26, 2005 5:07 pm

Thanks Built4thrashing,

From what I can see in that photo you basically have a big hose (air ducting) hose clamped directly on top of the throats. Simple enough. How well does that seal at the carby end? is an adaptor used?

I'll have to have a look at how I can do something similar.

Post by **built4thrashing** » Sun Jun 26, 2005 8:50 pm

there is an adaptor in there if you look close enough. dont know who makes it or where ya can get one as this was already on the weber i bought from a swap meet. you could make your own but just make sure air enters in from the top.

Post by **JrZook** » Thu Jun 30, 2005 4:25 pm

alrighty then...................................
Drove home from brizzy to cairns, so now its time to get stuck into this weber conversion

Ok progress so far, ported the intake manifold to suit the adapter plate and ran the wire wheel thru it to clean in up. Nice Smooth and shiny

. Made a neat throttle cable bracket out of old asian parts and put a rebuild kit thru the weber.

Engine:
G13a (1324cc)
lukey etractors, 2inch system, resonator and straight thru muffler
ported intake to suit adapter
Bosch gt40 ignition coil and spitfire 8mm leads
weber 32/36 on redline adapter plate
finer filter top mount foam air filter

Test:
So far i have tried;
ventruies 3.5/3.5
emulsion tubes f50/f50
air correctors 160/170
idle 60/50
mains 135/140
Advance 10 BTDC
Results:
Bit jumpy just off idle, smooth from 1500 thru to 4500rpm bit boggy after that. secondary seems to be a bit rich idle mixture to lean.

Test2:
mains 135/130
richened the idle miture 1/4 turn
Results:
nice smooth off idle tho a bit of studdering around the 4500 mark, runs out of puff up high. But the weber is very loud meaning nearly close with the mains. Run out of jets round the 130-140 mark so gotta head down to carby shop and get a 135 for the secondary. Would like to try a 132 and 137 but they dont have the jets or drills in that size. Also getting a 65 and 70 idle primary jets.
Will post later.
Cheers Dan.

Post by **built4thrashing** » Thu Jun 30, 2005 9:08 pm

try using a 4.5 auxilary venturi in the secondary. it allows the carb to suck more fuel at full throtle and you can then run a smaller main jet. mine is doing similar things at the moment.

Do you get any stuttering on initialtake off. if so try to get hold of a F66 e-tube.

ive learnt that you dont kneed more fuel at high revs just more air velocity.

Post by **JrZook** » Fri Jul 01, 2005 12:14 am

Tried;
135/135 main
70/60 idles
160/170 airs

No jumping of idle very smooth on light throttle, tho has a sag round 3500-4000 and then round the 5200 mark. Will try a 140 pri main and a sec idle of 65. Also got hold of a few f9a emulsion tubes will try then out.
The setup atm is very close. Try Try again.......................
Cheers Dan

Post by **JrZook** » Fri Jul 01, 2005 1:51 pm

Upped the idles to a 75/65 heaps smoother thru the primary, secondary still a tad saggy. Timming at 12BTDC pulg colour nice and tan near the electrodes. Does have a hesitation when you stomp it round 2500-3

Post by **Red_Zook** » Fri Jul 01, 2005 3:46 pm

Ok just a question, i have a webber as you know built4thrashing, and it is rooted, im after a new one? 34dms would be lovely?
any one?
even if any one see's one at a market under lets say $50 as long as it is a dms webber get it i will buy it
Spanx
Phil

Post by **JrZook** » Fri Jul 01, 2005 6:41 pm

Ok so far im satified with the jet setup, no flat spots, secondary feels strong and the idle transition is smooth.
Setup:
idle:75/65
air correctors:160/160
mains:140/135
emulsion tubes:F50/F9a
Cheers dan

Outer Limits 4x4 Board

who's got a weber on a sierra

who's got a weber on a sierra

not any moore

55

fdsafasdf

Who is online