holley 600 carb. on a 4.3 v6

[yellowbeard]

ok guys, Do I have to much carb on my car? it seems to load up at idle. is it possible to change the jets to smaller one? if so what do I need? thanks joe

[TFoch]

Jef posted this link in his Forum Jef's GM Tech Center in the thread Carb Sizing.  http://www.holley.com/applications/CarburetorSelector/CarbSelection.asp.  It was helpful to me as I had a 660 cfm on my stock 283 which was too big.  I'm going to get a Holley 390 cfm to replace it.
Tom

[logride]

The 4.3 in my 27 has a quadrajet  on it and it works great. Not sure what size it is.

[Rattiac]

I have a Edelbrock 600 on my 231 v6 and I jetted it down in all 3 stages if I remember correctly.
Exept one because I didn't have the jet. I gained more power and it runs great also passed I/M easily without cats .

It was my first time jetting a carb and went through the manual 150x to get it make sure it was right.

I got it from Summit and they said Id need 430cfm for my motor but your kinda limited on options at that cfm so I bought the 600.

[yellowbeard]

well I feel like a idiot. got my carb running great. Pulled the breather off and the manual choke was closed, opened it up and it ran great.

[TFoch]

Ah we all make mistakes, that's how we learn.  Glad you got it running.

[logride]

You gotta like the free fixes!