My Dellorto Jetting Setup

[ol_skl_jp]

Hey everyone

 

On Saturday (6/12/08) at the Z car BBQ/Photo shoot, i was asked by a couple of members what my jets where, because i'm having some trouble with my Dello's. I couldn't remember of the top of my head but found the sheet where i wrote it all down. I'm missing some information but pretty sure got the main ones.

 

L24

DHLA40

Chokes : ?

AUX Venturi : 7848.1

Main Jet : 200

Air Correctors : 110

Emmulsion Tube : 7772.5

Idle Jet : ?

Idle Jet Air Corrector : 7850.1

Accel Pump Jet : 40

Cold Start Emmulsion Tube : 7482.1

Cold Stat Jet : ?

 

Also thanks to all the members who offered to help me with this problem, this is why Auszcar is my fav. forum .

 

I think I might use the "Jetting" program that Sulio posted in another thread, as he said he got pretty close sizes from the program compared to his final setup. I'll post up the ideal jetting sizes from the program later today.

 

Sach

 

 

 

 

[ol_skl_jp]

These are the ideal jetting sizes...

 

I will wait for some input from members before i go out and buy these jet. I can fine tune the Carbs from the ideal setup.

[Scoota G]

I think you have the Main jets and the air correctors mixed around. 110 mains i think you meant and 200 air correcters. 110 is to small for a main for a 2.4, warren is running 125. i tried a set of 130's on the trip to Melbourne but they are too small for my 2.6 and i changed them back to 140's.

Is it running a bit hot? Tempreature

Where are the flat spots? In RPM's

 

I can send you the 130's i have and you can give them a bash, i think it will help.

 

Idle jets are also critical.

 

I'm running 46 idles as the 52 idles were too big.

[Toecutter]

I also have a bunch of spare jets. Give me a call and you can drop by if you want to get em working better. I'm sure we can sort it out easily!

 

Sulio

0413 188 024

[ol_skl_jp]

Mark i'll take off the cover and have another look. Also the engine is running a bit hot and there is a flat spot all the way up to 1500rpm. Im also running performance cam, which i was told doesn't help the flat spot or something like that.

 

Im going to read through the dellorto powertune book again see if i can get a better understanding on the jets and what their sizes mean.

 

Sach

[Scoota G]

I'm a thinkin the 130's will solve your problem no sweat.

Personal message me if you want to borrow them to find out. Only the cost of a PostPack

[ol_skl_jp]

I just had a look at my idle jets, the thing is theres 2 different types in each carb. Ones a 40 and the other is a 48. Thats not right yeah?

[Scoota G]

Ouch that will put it all over the place and no it's not right. You'll need to get onto ebay an get a set of 46 or similar.

[Scoota G]

Here's one guy on Ebay

 

http://cgi.ebay.com.au/Dellorto-DHLA-DRLA-carburettor-main-jets-Set-of-6-NOS_W0QQitemZ330281886757QQcmdZViewItemQQptZAU_Car_Parts_Accessories?hash=item330281886757&_trksid=p3911.c0.m14&_trkparms=66%3A2%7C65%3A1%7C39%3A1%7C240%3A1318

[ol_skl_jp]

I have already called him he has stock of 46 not 45 so i will put in an order now.

 

Cheers

Sach

[warrenz]

Hi Sach,

 

In my L24 I am running 125 main, 7772.8 emulsion, 210 air corrector, 35 pump and 46 idle. As I said on Saturday I have a Colourtune spark plug so you can see if your are running lean or rich.

 

PM me or call on 0414 520 686 and you can drop around in Kensington this Saturday and you can put my set up in your car  or mix and match with what you have and try it out.

 

I have a set of 145 Mains and 55 idles somewhere.

 

Warren

[ol_skl_jp]

Sounds good Warren, i will try get the day off work. If i can i will give you a call tomorrow.

 

I was reading about Colortune kit today, was going to PM you to see if had was what you had. Looking forward to seeing it in action.

 

Cheers

Sach

[ol_skl_jp]

Okay... i have tried tried Scooter's 130 main's and 52 idle's seems to be idling alot smoother now.

 

All 3 carbs have been turned out 6 times from the lightly seated position.

 

I am still getting a bit of  "bog" when i press the accel pedal quickly, so thinking of going down to a 35 from 40 or even 30 its trial and error. However a  pump jet cost around $17 each, so i was wondering if anyone had any pump jets lying around in a 30 or 35 that they would mind lend me , will have to get in contact with Sulio when he gets back from Sydney to see what is in his spare bag.

 

Sach

[ol_skl_jp]

Was looking over my current jets again, went through all of them this time instead of just looking at one and assuming they were all the same in the other carbs found that 2 of the carbs were running different pump jets to the other. Two had 33 and one had 40's, im heading out now to get 2 more 33's.

[warrenz]

As I have learnt, squirting the same amount of fuel at the same time into the venturi's is critical for smooth transition from the idle to the main circuits.

 

Warren