DAVID GRIMES

OK. I already have the old school 4 port "rally ported" 13B with a Mikuni 44 sidedraft carb. I have hesitated ( no pun intended ) to replace it because I am unsure of the best way to go. My questions:

1) Do the sterling carbs ( modified nikki ? ) cover my normally aspirated ( non boosted ) application ? or are they undersized ?

2) If so, are they also up to the task of being supercharged ? or is there a better choice ? Or is what I already have the way to stay even though parts are getting hard to find ?

anthrax

Um why don't you PM Sterling or RX7Carl they are the ones who are best equiped to answer your questions...

DAVID GRIMES

I did. Last night. No reply yet, but I was hoping there are some product owner / users that have a sterling carb on a ported 13B and can give me some personal feedback from that standpoint. Do they tune and start easy ? Any bog ? Enough CFM's for a ported 13B ? Do they starve at 7 grand ? Are they the best for the application or are they the best for the money and better than stock, but not as good as something else.

Maybe even somebody out there that used to have a Mikuni or Weber or Holley in their 13B and now has a Sterling... or maybe even somebody that is running a sterling and a supercharger ( Camden or other ).

I'm certain any of them will work and I'm more certain that if I call every one of the people selling them that I'll get all kinds of recommendations based on their experience ( that may be deep into their product but limited from a comparison standpoint ). Not that anybody is intentionally bullshitting, but hey... they only know what they know.

I've read all kinds of **** and it may all be true, but how can I tell ? I read that Mikuni's love SC boost. I've read that Holley's don't corner without certain float setup. I've heard Holley was easier to tune than Weber and vice-versa.

I can't afford to get them all and try them out. I'm in Podunk, so I don't see making it to a Sevenstock to see and hear and maybe drive some of these variations, so I'm asking...

Anybody know what carb I need ? Is the answer different if I supercharge ?

My goal: 1st: the right/best carb for my application
2nd: supercharge
3rd: 4.88 gear
I want the car to be much quicker 0-100. Don't give a **** about top end past 100 mph. I don't want to overdue anything to the point of sacrificing starting, idling, street drivability, or longevity.

Rx7carl

I'd suggest you look at a Holley for what your wanting to do. I dont think our carb will support that much airflow. There is a limit to what the Nikki can be made to flow due to the size of the throttle bores, and we havent worked out the details of boosting it. Also the Holley is what will go right on the camden SC kit.

calvinpaul

iTrader: (2)

So Carl, it is difficult to boost a nikki? How much boost are we talking about or none at all? I would really like to keep my nikki, but I also want to go turbo. I think the cheeze man boost preps them, but he also said that it would bog, idle like crap, and start hard?!?!

DAVID GRIMES

Carl,

I really appreciate the straight scoop. I expected that from your many knowledgable posts. It sounds like you have a great product and know its applications of what it should and should not do like the back of your hand. Thanks.

Rx7carl

We havent had a decent opportunity to get this work done. So I cant really say how difficult it will be. I know the carb can handle the pressure, its getting the fuel curve right that needs to be worked out.

CarlRx7

i am surprised that the mikuni 44 flows enough airflow for a streetported 13b!

carl.

mikey D

sell me a nikki and ill find out for you.
sterling told me you guys were to backed up to do one till after xmas....
the fuel curve wont really be a big issue either.
you jet it for NA on the pimarys and you can just leave gross jets in the 2ndarys or whatever 2ndary that works for NA at your altitude.

the more air that goes in the more fuel goes in to.
the webber i ran didnt have anything special going on.

Rx7carl

Mikey, when I get my boost carb back from Zac, we'll talk. Im shut down till January. Moving next Monday into the new house, setting up the new shop, then holidays and all. I'll be lucky to get it all done.

I am in agreement on the jetting. Just need someone whos willing and able to really get it done.

mikey D

im willing to pay for a carb...i need one anyways...

if you can send me a 13b 4 port manifold(i think i remember you saying you had one) and a turbo hat for the nikki ill test it before i full put my efi hardware on.
ill get you a dyno result within 3 months....time limitations..im sure you understand.

italian_stud02

you gotta love that juice RX owners have with each other,

kuhlrx7

IMHO I would stay with the mikuni for useing boost. I have done it before but on a 12a wit a turbo. I was happy with the results

DAVID GRIMES

I'm pretty sure it doesn't. Never has been 100%, but it's what I got and what I have temporarily.

Sterling

If you have a stockport 13b and suck-through blower, a Sterling Carb should work fine.
The boost application everyone seems to be having problems with is in blow thru configuration.

DAVID GRIMES

Will you expand on that, Sterling ? Explain the difference, etc. Can the Camden SC be either way ? Yeah, I noticed you said stockport, but I'm still curious...

Sterling

Well, it just means that when the blower is located between the manifold and the carburetor, then the blower is behaving like an integral part of the engine as far as the carb is concerned, and it behaves fine.
But in blow-thru set-up, whereas tha blower is set on-top the carb, then the blower is acting like a changinging atmosphere as far as the carb is concerned, and that is much more tricky to deal with.

Metallic Rock ran his Sterling Carb on a four-port 13B stockport and was extremely pleased.
We have yet to see what it will do on a streetported 13b. I have my doubts about what any carb's true potential is on a ported 13B because of the lack of "super-manis" available.

I don't have any problem saying that the only way to know for sure is to try it.
That's because I offer a thirty day money back gaurantee.

mikey D

im doing blow thru...suck thru is dangerouse and VERY inefficiant in my opinion.

Rx7carl

Its a deal. Just gotta wait for FBII to get my carb back to me.

I dont think the mikuni will flow enough either. Will it work? Of course, so will a Sterlingcarb. Will it flow enough air to get the maximum potential? Doubt it highly.

DAVID GRIMES

Dangerous ?

Jeff20B

iTrader: (13)

I have a street ported 13B with a super-manis, I think. What it lacks in a dual plenum, it makes up for in a dual stud pattern. I'm willing to test a 313-flowing Nikki on it as well as a rotary-prepped (hopefully rebuildable) Holley double pumper (it might be an RB job but not even they know for sure, lol). I might be willing to test a Sterling carb on it, if properly coerced.

Sterling

kuhlrx7

my mukini was a 48 on the 12a large street port that I had turboed, I have heard of several people using the 44 on 12a's with a turbo having great results. my experance was good but mine was larger. I also had the 44 on a na 12a, for a 13b ported with turbo you should go larger than the 44.

Jeff20B

iTrader: (13)

Spare carbs? That's a good question. I need enough for my projects. After that, I'll have some spares. The fun is figuring out which to keep and which I'll send to you.

Do you have a preference? Like can they be a Nikki from any year? Since getting that Hitachi to work, Nikkis are all I have left. Ok, I'll think about it.

Sterling

What you are reffering to as Hitachi carbs are the ones I'm interested in, Bubba.