kc-fb

hey, i'm looking at either getting my nikki rebuilt, or getting something slightly bigger. i figure an intake manifold is necessary to go along with it, as long as an exhaust. i can get a good deal on edelbrock carbs, and was wondering if anyone knew which one would work best on a stock ported 12a? or maybe they're all too big... hmph

84stock

iTrader: (5)

http://www.edelbrock.com/automotive_.../thunder.shtml The edelbrock is so easy to tune. I suggest the 500cfm for stock or streetported. You "must" choose the thunder series so you have adjustment with the secondaries, and this adjustment takes seconds, soo easy! Because it has a single float bowl, you don't have the fuel slosh issues common with a holley. You could even fabricate linkage from the nikki onto the edelbrock (if you are creative and can weld) to manage the omp and then tap inthe the fuel bowl with the omp line. Can't beat the edelbrock!

84stock

iTrader: (5)

Just so you know that i know, I have a demon 650, holley 850, holley 600 and edelbrock 650 thunder series to play with.

85rotarypower

I got an edelbrock performer series 600cfm carb on my 88 6port swapped into my 82. So far it runs excellent. Have to see about tuning, but as far as I can tell, it will be a fairly simple process. For your 12A, I would suggest the smallest one you can get. I don't think edelbrock makes anything smaller than a 500cfm, but stay above about 450 I'd say. The sterling modded Nikki flows about 465 I think, so a 450 is just about perfect, but a 500 will work just fine too. Also, some have successfully used the 600 and 650's on their stock 12A's, just takes the right tuning to make it work.

One other thing, one forum member by the name of rototiller1 successfully used a Carter AFB (an edelbrock performer series) sized 625cfm on a stockport 12A. Here is his thread. That will probably give you a very good starting point for tuning. Use the metering rods, jets and stepup springs he specifies in the thread. They were .095 primary jets, .101 secondary jets, #1445 metering rods with the pink springs.

https://www.rx7club.com/showthread.p...ght=Carter+AFB

85rx12a

sorry to be jackin but what kind of intake would i need to this aswell?

85rotarypower

You need any manifold that will allow a standard square bore carb to be mounted to it. A square bore carb is any holley, edelbrock, demon, or similar 4 barrel carb.

kc-fb

suggestions on said manifolds? i saw rb has ones for holley and dellorto but they wouldn't work for an edelbrock, eh? btw if anyone is wondering the edb carb to get for a stock/mild ported motor is # 1803.

MosesX605

The RB Holley intake should work, unless there are some clearance issues between the carb and the engine. I've never tried it myself.

Alternately, you could get an adaptor made fairly easily. A friend of mine did that when he converted his Starlet to a two-barrel Holley for a blow-through turbo. It worked really well.

Latin270

Yes the RB intake manifold will work perfectly. A minor issue is clearence but a spacer takes care of that. Its a cinch to install and almost a 1000 miles later its still running like the beast she was meant to be! Edelbrock 500cfm is simply an excellent choice for anyone looking for an inexpensive alternative to a Holley with far greater tunability and performance! (is "tunability a word?)

MosesX605

How does the Edelbrock work in hard corners?

Does it exhibit the same starvation issues that make the Holley all but unusable for road racing/Solo II?

kc-fb

hm, let me ask this: is the stock intake manifold restrictive enough that i should invest in an aftermarket one? i know every little bit counts, but how much of a difference are we talking about here? i'm sure i can find an adapter around here that would work for my stocker...

kgray

good luck finding an adaptor.... if i were you i would head to the for sale/wanted section and look for a racing beat holley manifold. They can be had for cheap and eliminate the need for blocking off the stocker.

dbragg

iTrader: (7)

i may have an adapter to mount a holley or whatever on a stock manifold. i have to check and see if i still have it.

84stock

iTrader: (5)

This was my home brew intake for a holley (just playing with stuff kicking around).

MosesX605

That's right on, 84stock!

Is that what you're running your carb on now?

84stock

iTrader: (5)

Nope

85rotarypower

To answer the questions about fuel starvation, its not likely too much of a problem. The fuel bowls are oriented in the same way the stock nikki's are, meaning it would probably act the same way as a nikki carb. My Performer series even has a baffle just in front of the secondary jet to help combat fuel slosh in the bowls. I'll be able to make a good report on this after May 21st, I have a lapping day at a "local" track, and that will be the true test of the Edelbrock. There is also a dyno so I will have good numbers for you all.

Paradox

iTrader: (1)

i ran a 13b with a Edelbrock 600 CFM performer for awhile, it was pretty good but i prefer the holley, i never had fuel starvation issues with either carb.

the edelbrock i ran with a half inch spacer, by the time i was using it that 13b had a blown coolant seal and the car was a bitch to drive either way.. anyways, you can only run a edelbrock with a spacer on the RB Holley intake, or make a custom intake. the choke gets in the way and running with no choke makes one helluva smoke show on startup.

813KR$

The lightwieght adjustable valve secondary is the reason edlebrocks need high intake vacuum and dont run good on rtry's

chedda_j

does anyone know the part number to the racing beat intake for the holley. I cant find it anywhere and i cant find an idavidual listing on the site. Can anyone help. I have a 600 im putting on my car right now and i need to know.

chedda_j

nvm found it.