12a79

i just got a 48 dellorto carb i am planning on using it on my stock 12a engine with full racing beat exhaust i want some advise on wat jets to use also on how manny pounds to run the fuel pump at if anyone has a similar setup post to help me please

MattG

iTrader: (2)

I want the same advice, but for a StreetPort Engine. Sry not trying the thread jack.

rmriggin

2-4 PSI for the fuel pump is all I know. If I own another carbed rotary vehicle I will go with a weber IDA or DCOE (downdraft or sidederaft) instead of my the Holley I have now. I have found only one web page that lent any useful information to start at with jetting a weber for rotary application.
http://www.mazspeed.com/carburetorfacts.htm

Siraniko

iTrader: (13)

I recommend a holley red. Unlike the carter, you can mount this under the floor board when the original one is mounted.

12a79

mattg a friend just emailed me a site with info try this here

12a79

just in case let me post the site here it didnt seem to pop up on other screen its www.gruntled.com/dellorto/brad-jetting.html if not just try www.gruntled.com and surf the site

t_g_farrell

iTrader: (1)

I have the RB prepared Dellorto on my 80 GS 12A (stock engine) with a header/exhaust from Rotary Engineering. Things to watch out for:

Don't mess with the accelerator pump unless you really need to. Specifically the thick black gasket RB installed on it. If you open the accel pump up, this gasket may not be reusable or may leak when you put it back together and you can't get a rebuild kit that includes it. Ask me how I know :-) You'll have to fab your own or do without it.

Go over the entire carb and clean it with carb cleaner and compressed air before you even try to install it. Open up the top and clean it all out.

While the tops open adjust the floats to 14 mm ( I think thats optimum ).

You may want to add an extra spring to the choke to make it return consistently when you let off the choke. The small circular spring on the Dell choke isn't strong enough.

Read that gruntled site a few times and make sure you understand it all. Theres a lot of good info on there.