Rocketman Carb Adapter

[drumnerd33]

Another thing I didn't mention is you also wanna keep dropping the jet size till you feel a loss of power and then go back up one step, then use the air correctors to dial in on your wide band o2

Sent from my LG-LS970 using Tapatalk 4

[95Compact]

Tom, that's what it's looking like... Before I ordered, I called Weber to ask whether the kits they sell come jetted for the application and they told me that they do... Maybe I was told wrong? Or maybe they just haven't done the fine tuning on the Samurai kit?

You'd think that they'd be able to calculate the jet sizes a lot closer than this. A 1.40mm hole versus 1.0mm is a flow area difference of 50%!! Thats a lot of wasted gas.

[95Compact]

Thanks drumnerd,

Hey do you know what your secondary main jets were changed to? I was going to guess at about 120 (1.20mm), but if you already have the size figured out, I'll just rebore it to what you have..

I plan on ordering just the main jets (they're only like $6) after I finalise the new sizes.

[TominMO]

Well, no wonder the B3 is running rich - the jets that came with the K601 Weber kit for the Suzuki Samurai are:

Main Primary: 140
Main Secondary: 140
Air Corrector Primary: 170
Air Corrector Secondary: 160

These seem to be appropriate for about a 2.2L engine if I've understood what I've read correctly...

Any idea why they are supplying these jets with a kit for a 1.3l Suzuki?

They seems to put those jets in all their 32/36 carbs. That's what my Subaru 1.8 liter carb kit came with. Probably rich for that car too!

[drumnerd33]

That also means your air correction jets are pretty damn close, good job.

Sent from my LG-LS970 using Tapatalk 4

[95Compact]

Good news, I took a chance - I soldered and rebored my main primary jet out to 0.98mm and just had a drive.. results:

14.3 to 14.9 AFR in almost all points of light acceleration and cruise (only using the primary butterfly)... Probably a 30-35% reduction in fuel use compared to the stock jet test yesterday.

I'll remove and rebore the secondary main jet tomorrow.

=)

[Spike]

My Weber came today.. hopefully will install tomorrow.

[drumnerd33]

And I used the old weber drill bits and solder to downsize.... Alot cheaper then jet kit

Sent from my LG-LS970 using Tapatalk 4

[drumnerd33]

Wide band o2 sensor... Started with a short band and it was pointless not accurate at all.

Sent from my LG-LS970 using Tapatalk 4

[95Compact]

drumnerd, how did you arrive at your 100-size (1.00mm) jets?

Did you use an O2 sensor or was it all trial and error?

[95Compact]

Well, no wonder the B3 is running rich - the jets that came with the K601 Weber kit for the Suzuki Samurai are:

Main Primary: 140
Main Secondary: 140
Air Corrector Primary: 170
Air Corrector Secondary: 160

These seem to be appropriate for about a 2.2L engine if I've understood what I've read correctly...

Any idea why they are supplying these jets with a kit for a 1.3l Suzuki?

[95Compact]

Well, after driving around a bit it looks like the cruising AFR is about 10.2 to 10.5 and the full throttle AFR is about 11.3 to 11.5

I'm hoping with a little experimentation and the WB 02 sensor, we can find a set of jets that we can all just drop in and be very close to best running.

Again, the car runs and drives wonderfully, but obviously these care are driven mostly for their economy =)

[TominMO]

OK, thanks 95Compact.

[greywolf200]

Ok, installed my Innovate LC-1 today.

At idle, it was running about 12.1 A/F ratio and this was easily tuned to 14.3 with the idle mixture screw. I was VERY impressed with how direct and repeatable this adjustment was in changing the idle AFR, and also how stable the AFR was (it held steady within about 0.1 or 0.2).

When the RPM ran up (with no load), the AFR went very rich - all the way to 10.1. It may be even richer than that because the Bosch WB O2 sennsor and LC-1 can only read down to 10 AFR.

I couldn't drive the car because my laptop battery was dead and I had to have the extension cord plugged in, hehe. Should be able to get more data tomorrow.

I can see that the air corrector jets are 170 and 180, but I can't see the main jets. Maybe I'll call Weber on Monday to ask what they currently ship the Suzuki Samurai kits with (and verify that they're still the same as drumnerd's).

I'm hoping it'll be a lot closer on my modified B6. Will let you know.

[jason_]

Direct injection would be the only way to get reallllly lean for those coast moments, , 50 or more. Basically enough fuel to discourage engine component drag when coasting, as DI has no intake vacuum, it's open throat, like a diesel.

But you'd have to have all the other goodies to make it be fully customizable and tunable. Full tune of spark and spark advance, variable valve timing for some control over intake duration, etc etc

Opens many new ideas.... Double injecting, another shot of fuel while first squirting is almost fully burned, do it again before down stroke finishes and fire the plug again...

DI is gonna be fun when it gets more mature and cheaper.

Sent from my rooted HTC Supersonic using Tapatalk 2 Pro