NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   Weber Jetting (https://www.nopistons.com/1st-generation-specific-16/weber-jetting-38574/)

Racer X 05-09-2004 04:52 PM

What sizes should be in my carb for it to run properly?This is the same annoying carb that I got off CP racing the "supposedly" came off a identical stock port that was running as well.I have had the carb for almost a year and thats how long its been sitting trying to figure the fucker out now.Any sizes close to what I need is very usefull.This carb was used for 10 hours prior to me buying it.



Thanks

Racer X 05-12-2004 11:53 PM

Anyone? I need this one running sometime this year so I can get back to work on my turbo.

730RWHP12A 05-14-2004 05:12 PM

what size is the carb? what motor/port/exhaust do you have?

Racer X 05-15-2004 02:02 AM


Originally Posted by 730RWHP12A' date='May 14 2004, 02:12 PM
what size is the carb? what motor/port/exhaust do you have?

Its a weber 45 DCOE on a stock port GSL-SE 6-port NA block with a Racing Beat Header and 2.5" exhaust.No emissions.

Racer X 05-16-2004 01:36 AM

Anyone else know?

boosted12a 05-16-2004 10:33 AM

well, first off, whats in it? mains, air bleeds, e-tubes, idle jets and ap jets? that will be a goos starting point. altitud and tep/humidity have an affect on how the car runs. waht fuel pressure are you running? mazspeed.com has an aticle on webers in the facts section, check that out, it has some recomendations. also, are you running the 5th&6th ports open? or are they working as they are suposed to?

730RWHP12A 05-16-2004 09:02 PM

go with f7 or f11 emulsion tubes....... 65f8 or 65f9 idle jets.....180 main fuel jet to start with and a 180 to 190 air jet....the venturies that work best with a 45 carb are 36mm.... some shops use 38mm or bigger to get more flow out of the carb but it usally results in excessive carb bogging.....thats a good starting point.....

Racer X 05-16-2004 11:46 PM


Originally Posted by boosted12a' date='May 16 2004, 07:33 AM
well, first off, whats in it? mains, air bleeds, e-tubes, idle jets and ap jets? that will be a goos starting point. altitud and tep/humidity have an affect on how the car runs. waht fuel pressure are you running? mazspeed.com has an aticle on webers in the facts section, check that out, it has some recomendations. also, are you running the 5th&6th ports open? or are they working as they are suposed to?

Not sure whats in it right now.Supposedly this came off a running 6-port 13B like mine but has never ran for more than a few seconds on my Se 6-port motor.I regret selling my dellorto for this carb now.I was running a 48 DHLA last year with no problems other than the occasional flooding.I have now sleeves on my aux. ports now.

Racer X 05-16-2004 11:47 PM


Originally Posted by 730RWHP12A' date='May 16 2004, 06:02 PM
go with f7 or f11 emulsion tubes....... 65f8 or 65f9 idle jets.....180 main fuel jet to start with and a 180 to 190 air jet....the venturies that work best with a 45 carb are 36mm.... some shops use 38mm or bigger to get more flow out of the carb but it usally results in excessive carb bogging.....thats a good starting point.....

Thanks for the parts list.Now I need to wait till the end of the month to price this stuff out.Need to be on night shift so I can price it out in the morning.Damn dayshift makes it to late for me to order stuff after work. https://www.nopistons.com/forums/pub...IR#>/angry.png I just want this thing to run. https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

730RWHP12A 05-17-2004 12:56 AM

well before you go buying anything you better find out whats in your carb to begin with.....

i dont like Dellorto carbs but if i had to pick between a 45 weber or a 48 Dellorto i would have to pick the Dellorto.....

the 13b motors really need a 48 to run properly.......

the best would be a 48 weber!!!!!!that would haul ass!!!

Racer X 05-17-2004 11:26 PM


Originally Posted by 730RWHP12A' date='May 16 2004, 09:56 PM
well before you go buying anything you better find out whats in your carb to begin with.....

i dont like Dellorto carbs but if i had to pick between a 45 weber or a 48 Dellorto i would have to pick the Dellorto.....

the 13b motors really need a 48 to run properly.......

the best would be a 48 weber!!!!!!that would haul ass!!!

Are the venturi sizes on the or is there a specific way to measure them?I need to figure out how to measure all these parts now. https://www.nopistons.com/forums/pub...1047683358.gif

boosted12a 05-18-2004 06:05 AM


Originally Posted by 730RWHP12A' date='May 16 2004, 09:56 PM
well before you go buying anything you better find out whats in your carb to begin with.....

ummm, didnt i already say that? what wrong robert? they kick ya off the forum and you lost 50 hp?

treceb 05-18-2004 09:58 AM

actually, i think he gained 50. wasnt its 680rwhp12a??



just get a damn holley with one of these...lol

http://kgparts.com/images/Intakes/13b6port.jpg

j9fd3s 05-18-2004 11:36 AM


Originally Posted by Racer X' date='May 17 2004, 08:26 PM
Are the venturi sizes on the or is there a specific way to measure them?I need to figure out how to measure all these parts now. https://www.nopistons.com/forums/pub...1047683358.gif

my ida has the number cast into the venturi, most of the other stuff is stamped

Racer X 05-18-2004 11:30 PM


Originally Posted by j9fd3s' date='May 18 2004, 08:36 AM
my ida has the number cast into the venturi, most of the other stuff is stamped

Cool,Thanks mike

Racer X 05-18-2004 11:31 PM


Originally Posted by treceb' date='May 18 2004, 06:58 AM
just get a damn holley with one of these...lol

http://kgparts.com/images/Intakes/13b6port.jpg

Some days I wish I had.I know webers are well known for being reliable tho.Once you get the tuned. https://www.nopistons.com/forums/pub...1047683358.gif

730RWHP12A 05-20-2004 04:40 PM


Originally Posted by Racer X' date='May 18 2004, 08:31 PM
Some days I wish I had.I know webers are well known for being reliable tho.Once you get the tuned. https://www.nopistons.com/forums/pub...1047683358.gif

dont worry...with a little help and some tuneing your 7 will be running good!!

Racer X 05-21-2004 01:04 AM


Originally Posted by 730RWHP12A' date='May 20 2004, 01:40 PM
dont worry...with a little help and some tuneing your 7 will be running good!!

Yup.I tell people its only a matter of time till I terrorize the streets once more.

Racer X 05-27-2004 11:56 AM

I'll order some jets and **** thru racetep.They seem to deliver really quick here

boosted12a 05-27-2004 02:44 PM

go to carbs.net, they have pretty good prices on weber jets and they have any part you could need

treceb 05-27-2004 03:06 PM


Originally Posted by Racer X' date='May 18 2004, 11:31 PM
Some days I wish I had.I know webers are well known for being reliable tho.Once you get the tuned. https://www.nopistons.com/forums/pub...1047683358.gif

i was just saying. ppl sear by jeytech parts and holley parts are available everywhere.



im a fan of dellortos. i bought 2 identical set ups when i was rebuilding my engine. once it was done, i loved it...

Racer X 05-29-2004 04:18 PM


Originally Posted by treceb' date='May 27 2004, 12:06 PM
i was just saying. ppl sear by jeytech parts and holley parts are available everywhere.



im a fan of dellortos. i bought 2 identical set ups when i was rebuilding my engine. once it was done, i loved it...

I know all too well about dellorto's.When they don't flood the motor they are a truely awesome carb.I wish I kept my 48 DHLA.I'd be driving it right now. https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

Racer X 06-13-2004 05:18 PM

Just installed them and IT RUNS.No idle yet but I hope I can fine tune it from here.Thanks everyone.



PS, heres the new setup: 180 mains,190 air with F11 E-tubes.


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