Alfa Pages Forum Index Alfa Pages
A forum for help with the Alfasud And Alfa 33
 

tuning rejetting 40 idf carbs

 
Post new topic   This topic is locked: you cannot edit posts or make replies.    Alfa Pages Forum Index -> For Sale & Wanted
View previous topic :: View next topic  
Author Message
baldy
Guest





PostPosted: Fri Jan 06, 2006 3:41 pm    Post subject: tuning rejetting 40 idf carbs Reply with quote

Hi folks, I am new to this so bear with me ,over the last year ive been building/restoring a sprint body work welding and so on thats done spray shop at end of feb .as for the engine its running and sounds mighty fine but i require information about rejetting before running on rolling road. carbs are as follows 36 choke 55idle 145main has any one done this before. help Very Happy
Back to top
Serpent33
Alfa Sprint


Joined: 06 May 2003
Posts: 210
Location: Singapore

PostPosted: Sat Jan 21, 2006 10:02 pm    Post subject: Reply with quote

Hi there. Based on the dellorto seting, I suspect that you are running lean. I rec'd 150 at least. Standard 32 choke is already running 142. I had selected jets based on AF reader and 155 main 180 air corrector is just nice (1:12 under load). I had chose 175 air corrector for a slightly richer high end (1:11 under load).


Do note that the set up is meant for dellortos and I am not sure if it's applicable for webers. There is a high chance that I might be wrong due to unknown emulsion tubes which changes the jet requirements. Good luck.

You might want to try- original jet size/original choke size X enlarged choke size. Round up to the bigger next available jet.
_________________
Each time I speed I say, "Dear lord, make me fast and accurate..."
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
baldy
Alfasud


Joined: 23 Jan 2006
Posts: 67

PostPosted: Fri Jan 27, 2006 10:38 am    Post subject: Reply with quote

sorry i forgot to say its a 16v engine with 8v carbs on.i think the chokes are 36 and emulsion tubes f11 . thanks
Back to top
View user's profile Send private message
Serpent33
Alfa Sprint


Joined: 06 May 2003
Posts: 210
Location: Singapore

PostPosted: Tue Jan 31, 2006 6:50 pm    Post subject: Reply with quote

Hi. I have cheacked the Weber manual. I think you are running a little lean. And if you might get a better response if you posted in maintenance section.
_________________
Each time I speed I say, "Dear lord, make me fast and accurate..."
Back to top
View user's profile Send private message Send e-mail Visit poster's website AIM Address Yahoo Messenger MSN Messenger
Rees Cees
Alfasud


Joined: 01 Nov 2005
Posts: 48
Location: Netherlands

PostPosted: Tue Jan 31, 2006 11:00 pm    Post subject: Reply with quote

the only thing you can do for the right settings is go to a Dynojet for the right settings.

and on a 16v you have to use at least 40mm carb´s no 36 mm
Back to top
View user's profile Send private message Visit poster's website
baldy
Alfasud


Joined: 23 Jan 2006
Posts: 67

PostPosted: Tue Jan 31, 2006 11:40 pm    Post subject: Reply with quote

the carbs are 40mm idfs with 36 chokes
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   This topic is locked: you cannot edit posts or make replies.    Alfa Pages Forum Index -> For Sale & Wanted All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum