Done some reading about this havent found anything for my scenario. Just though someone might be able to spit out a reccomendation for my weber 45 dcoe, for my mild streetport S5 motor with full RB streetport exhaust. I would tackle this on my own but i leave in less than 30 days for deployment and I want to drive my car to see my family in a week, I havent seen them in 2 years FWIW i have ordered a tuning a weber/delorto book it should be here tomorrow. A baseline setup would be great.

 

Here are some settings that will get you very close. I am using these on my street port 12A but it should be close to get you going....

Idle Jets = 65F8
Main Jets = 165
Air Corrector = 230
Emulsion Tube = F15
Pump Jet = 4.5
Chokes = 40mm
Auxilliary Venturies = 4.5
Needle & Seat = 3.00
Fuel Pressure = 4.5psi

 

You think that will work for a mild streetport S5. My redline is 8K

 

My Red line is between 7500-8000 also....

40mm chokes is the largest you can go on a 45DCOE the iddle jets are pretty much the same with the exception maybe an 65F9 wich is a littler richer... on the Emulsion tubes can be either F11 or F15 I am using the F15 because I get a leaner mixture at higher rpm's....

Main jets, those you can play with , I have had as large as 180-200 there, again, the larger the jest the richer it will be...

Needle & Seat I have 300 that should suffice for your engine also... fuel pressure has to be no more than 4.5 as 5psi being to high...

There's always some play as every engine is different but my has a very large street port so the settings should be close for your application. Again, there's always some play as every engine behaves different... I have been playing with my weber for well over 4 years... I have tried just about every setting and found these to be the best so far....

have fun tunning....

 

thanks Jose! This is whats currently in there now
2.00 needle valve
65 idle jet
190 main jet
f-11 emulsion tube
150 air corrector jet
4.5 pump jet
36 mm choke
45mm aux and vent

so i am going to order
230 air corrector
3.00 needle vlave
40mm choke
some main jets from 165 to 185

 

well almost 150 dollars later i orderd 2 x 40mm chokes and a bunch of air corrector and main jets to play around with

 

I know what you mean, I have expended a forturne myself on miscelaneous parts for tunning...

It does sound great when properly tuned...

I am making 137rwhp and 230 pound of torque... and 167 at the flywheel...

36mm chokes are definately too small...

Needle & Seat need to go up... 2.50 or 3.00 best choice...

your air correctors need to be between 20 30 numbers larger than your main jets... if you make them smaller it will be too rich... bare that in mind when you go up on main jets...

F11 or F15 should work for emulsion tubes...

I have 45 for pump jets but you might have to go 50 or 55 depending

Fuel pressure needs to be steady 4.5 no more...

I have vacum advance disconnected and timing advanced 5-8 degrees

make sure you have minimum of 1" more preferrable between the trumpet clearance and the air filter, if not enough it will choke..

The key to this is tune for low end first... your idles do most of the work between 3500-4000 rpm's so concentrate on good tuning below 4000rpm... then you can do the tuning for the mains...

What trumpet do you have now (stock)? longer are good for low end torque, while shorter will get best output at high rpms but you sacrifise a little at low (not much) in my opinion but others my have different views...

again is based on a particular engine... let me know how everything turns out for you...

 

My trumpets are id say about 3-4 inches before the filters. maybe a little less. I dont think ill be flyin around at 8k. So im looking gor a longer runner for more low end. I did 2 day air so i can get this done quick. Thanks for all your help ill let you know and everyone else. ill post a video when its all said and done.

 

wrong thread

 

get a 48 or 50 mm weber.. your choking the **** out of that poor 13B streetport!!!!
a 45 weber is good for a stock 12A, thats it!

 

Well i already bought all that **** for the 45 dcoe. its a mild street port at that. can I use a DCOE 48? If so what kinda setup reccomendation do you have 680?

 

100% on that!!!

 

Sux!

 

What kinda setup do you suggest for a weber 48 dco? I am setup for sidedraft currently and dont have the time to make some changes and more small linkage fabwork. i am sure ill here get a 48ida, wacky, 680.

 

45 is too small for streetport but you can get away with it for now. Just run it without venturies (like my usual comments on mikuni). A little bit helps. I have no recommendation on 48 DCO as I havent work on any of them in a few years.

 

So no venturies huh? I read about this on some prior threads.

 

thats how I have been doing it for years. In fact, I dont run venturies in my IDA at the track.