Can a Nikki be modified to support a streetported 13B?

Thanks, Ed

 

ofcourse, but that does not mean it would be optimal

 

can a Nikki flow enough for that, i know the Carl and Sterling have done wonderful things to the Nikki but is that enough?

 

A Sterling modded Nikki will probably flow close to that of a 45 Weber/Dellorto or a 44 Mikuni. I remember bench flow test results, and I know the modded Nikki was quite suprising.

BTW, I run a Mikuni 44PPH side draft on my street ported 13B 4 port.

 

My Yaw nikki flowed about 425CFM and it worked awesome on my old 13B 4 port.The engine wasnt ported out,but Im willing to bet it'd have supported a moderate streetport.NO bog ever,I retained the vacuum secondaries and the choke.It was a super responsive dream on my 12A,and the transition to a 13B only required a single size up on the secondary jets.
Give Sterling and Carl a call....a flowed out Nikki is just great on the street.No hassle or hesitation like you can get with other 2 barrel setups,and its not a V-8 carb thats "made" to work.

 

I'm just looking for options during my break in. I decided to break in my new motor in NA form and once its broken in then I'll boost it.

Thanks, Ed

 

Good precaution.
I had Mazdatrix break in my S5 TII motor for me.They just strapped it to a stand and slapped a Holley,Weber or somn' to it, and ran her up for a bit.

 

I think Carl/Dennis were up to 450 something on their modded nikkis. They can confirm/correct.

 

I see they have a banana carb in the works for streetported motors.

Thanks, Ed

 

hmmmm. Im tempted to say something but I dont want a useless debate.

 

465cfm is what their carb is up to (I'm having mine re-rebuilt as we speak). They've found some optimal flow there so I don't think they'll be pushing it any further (but anything's possible). So now the nikki flows as much as the RB Holley465 intake setup!

Jon

 

About 465 is all we can do. Any more and the venturi angles have to be changed, which will lower main circuit signal strength causing low end loss.

Contrary to what WhackyRotary says, the modded Nikki is actually optimal.
It's simply a matter of physics. Too many carb tuners know only what they have done that works, and they assume that's the only thing that will work. They have no idea why.

 

i have used alot nikki carbs and find they work good, but like sterling said your limited.. i enlarged the venturies(because the are tiny) and lost any hope of low end power,(but gained up top) again as sterling mentions..

i do like webers better tho... more power can be made without a doubt!


it just depends on what your looking for...

looks, well you cant beat a weber in that dept.!!!

budget carb with performance gains that runs good... cant beat a sterling carb!!!

unlimited tuning ability, cant beat a weber .......

 

so why not break it in with whatever intake setup you'll be using with the turbo - only ... without the turbo?

 

I didn't say you're limited by a Sterling at all.
In fact, I've said in other threads that I defy someone to show me the math and physics that demonstrate otherwise; even giving 80 cid instead of 70, and a max RPM of 12K!
There's no reason to go beyond 465CFM, and the Sterlingcarb has not compromised main circuit signal at low flow for the simple reason that I don't use a ham-fisted approach and just hog out the venturis.
The Sterlingcarb blows away the modded Holley 465 even just in theory, let alone real world application, because the Holley has such huge primary venturis that there's no way it can possibly have the signal to the main fuel circuit that the Nikki does at low air flow/RPMs.
A two stage, 4 barrel carburetor with removable fuel & air jets and adjustable secondary timing will always have better tunablility than any two barrel carb.

The difference between Robert's service and ours is that Robert is doing the installation, so all the customer sees is the before and after, and instant results.
Since our customers are doing their own installation, they also have to dial in the carb on their own. If they don't know what they're doing, they won't get the full performance potential of the Sterlingcarb.

Holleys are for people that don't want to learn to tune. Webers are for people who want to start to learn a little tuning.

The Sterling modified Nikki is far from the "Walmart" carb that Robert and his cult following generally make it out to be. It is intended for people who know what they are doing.
If I were installing the carburetors myself, I might be charging as much as Robert.

 

I am sure a nikki mod'd will be better then a stock nikki on a streetport 13b. I thought the guy was asking if you could fit/modify to fit a 13b streetport to run a stock nikki carb, opps..

 

Sterling should just send me his best modified Nikki so I can put it to test. and yeah, dont forget the heine's.

 

If there's beer & bbq pork, then Carl & I have to fly out there personally.

 

you got it bro.

 

48 or 51IDA