claytonjh1223

im looking into a rb intake from a guy on here and i want to know if i put a holley on there is it going to be too big for a 12a with only mods are rats nest removal,cat replacement pipe and cold air intake mod?
will i need a fuel pump other than stock?
what all will i need with this?

rexelite

i'm no carb expert, but 600cfm seems like overkill unless you're going to port the engine or maybe turbo/supercharge it. for comparison, the RB holley kit is only like 465cfm. also, from what i've heard, you won't get a drop more power from a carb upgrade unless you install better headers.

FuLLsMoKe

yep, if you are gonna get a new carb you gotta get headers (for a significant hp increase). 600 cfm is too much, like rexelite said. if you do drop on a carb, chances are you will need a new fuel pump since the stock pump is too weak.

vipernicus42

iTrader: (4)

Yeah, and I remember seeing somewhere (either paul yaw's site or felix's toolbox...) that a bigger carb doesn't equal bigger gains.... Too big a carb can have as many, if not more problems, than too small a carb. The 465 that RB offers is good for a stock engine, because they've tuned it that way... Until you get your car ported, stick with an RB or something that's built for rotaries that haven't been ported yet.

Jon

Rotary7s

I have ran s 600 dual feed/double pumper,mechanical secondaries for 2-3 yrs,

I havent had any problems,and it has been nice,and since my engine is ported now,I can still use it.

I also ran low 15s with just bolt on items,and could of ran 14s with proper carb tuning and better tranny.

Most likely you have a single feed vacume secondaries,I dont like them carbs but my freind runs 12s with his on his 12A.