Hey I was wondering, is the mikuni carb with 38mm venturis large enough for a 13B 4port with a SP. it's got headers with a full exhaust.

 

I think the Mikunis used on rotaries were 44mm IIRC.

 

Weber 48 IDA.

I've got a manifold for that motor if you're interested. 200 shipped. It's essentially brand new, with only 4000 miles on it. They go new for 270 + shipping.

 

i have the RB Holley setup for the streetport. it's kinda pricey new, u'd have to check racingbeat.com for exact price. if gas mileage is an issue, the Holley is a better choice over the larger 2bbl carbs.

 

mikuni is good but not enough for a large streetported 13-B. In fact, I wasnt satisfied with a holley 600 either. For me, IDA is different kind of HIGH...I always look for it.

 

dellorto!!!! talk about throttle response

 

dellorto hu? what about the dellorto 40 DHLA?

 

40 is too much...48 is common.

 

I have experienced with RB dellorto with one piece or 2 piece wrap around manifold. Its a good street carb but not aggressive. Very slow throttle response IMHO. It was a hype when they first came out in mid=80's. After loosing several street races, I went back to my old modified RX-2 carb.


Drivefast7 is using a LC manifold in his dellorto. he spent long hours to get it perfect...he did a good write up with it.I call him "Master Dellorto". I dont have no experience with a straight shot dellorto and there is a big difference between the 2 system...

 

Thanks Mel. Yes, I like the lake cities intake manifold and got it running great on a 12a sp and my current 12a j-bridge.

my repu has a 13b 4port, dellorto 48dhla and the rb 2piece intake manifold. 41mm chokes. that truck can move quick, but the 41's take away low end. i'm switching to 39mm chokes. i think the throttle response is fine, but it absolutely rips with the lake cities intake manifold.