rx7opel

uhhhh ohhhh i thought i bought a 12a while cleaning the motor tonight i found a 4 brl and a 13b? the motor came from a 79 rx, wonder if someone changed it? what about the 4 brl, plus i was looking on the forum and i did not see the "rats nest" of vac lines? now i have a side draft dellorto with RB intake will this work or do i need to go shopping? thanx for helping a tru new to rotary guy. did not take long to figure out this is no chebby!!!!

rx7opel

ps the intake is for a 12A!! so now im all screwed up!!

FB II

wow, stick with the carb setup that came with it then. yea, someone must have swapped a 13b in there. what kind of 4 barrel carb is it.. a holley?

capri93

I'll trade you a 12a for the 13b no problem.

peejay

'74-78 13Bs (RX-4, Cosmo, REPU) were carbureted.

mcnannay

thats not an uh oh at all, i would say "hell freakin yeah" instead. I wonder if its an old 4 port like mine, they bolt right up to the 12a tranny no problem. If you already have a dellorto, just sell the 12a manifold and buy the 13b one, im sure you can get good money out of the manifold, at least enough to cover most of the 13b. And those few extra ponies sure will be nice!

FB II

yep, someone may have put that in his 79 rx7

peejay

So do all rotaries, anything between '74 and present...


- Pete (13B in SA is sacrilege... it's like putting a L28 in a 240Z, or a 350 in a '69 Z/28)

rx7opel

so 13B is better cool, yes it is a 4 port, now what is the power output so on so forth as i said in my 1st post it is my goal to give my local mustangs a run for there dollars!! so how can i improve now

thanx Jay

cdrad51

Properly modded and tuned it can reach about 200 ponies.

Jeff20B

iTrader: (13)

You may even be fortunate enough to have a nitrided R5 13B. If so, you got lucky. Check mine out and compare it to yours to see if we can narrow down what type of 13B you have. https://www.rx7club.com/forum/showthread.php?t=405995