12a turbo
 

Just wondering about info on turboing the 12a using the factory Nikki carb. I know this has been done, and I did a couple searches but I didn't find much. What I'd really like to know is what mods need to be done to the carb, if any, and kind of boost are people running? Any advice on fueling upgrades are also welcome. I'm not looking to make any serious power, I just want to know what's out there. Thanks in advance.

-Patrick

The carb needs to be boost prepped by someone who knows what they're doing.

Now the only people I trust with my nikki are Rx7Carl and Sterling. Unfortunately I don't know if they've perfected their boost prepping yet, you'd have to ask them.

The only person I know who has a boost prepped Nikki running a blowthrough turbo is 'FB II'. I think Robert did his. Either way if I were turboing on a stock carb, I'd have Rx7Carl/Sterling rebuild it first, *then* have it boost prepped.

Throwing a turbo directly onto a 20yr old carb and engine seems like a bad idea to me, and an apex seal waiting to blow. My main advice is to take the time and money to do it right. :)

Jon

For sure the floats need to be filled so they do not crush under boost. Also obviously, you need a carb hat.

There's one for sale in the first gen parts forum, from RotaryShack.

what all is needed to turbo a 12a?

Hey, look what I found in the for-sale section!

https://www.rx7club.com/showthread.php?t=507909

Jon

Stay away from that thread! That's mine! :)

Money and a rebuilt engine. Adding a turbo to a 30 year engine is like putting your grandma on a skateboard.

Whaht all is involved in boost prepping the carb? It is a fresh rebuild maybe 2000km ago. Car may be 28 years old, but it has less than 16000 original km's on the clock. I'm not looking to run anything over 5psi ... I have an Audi for that. :)

bump.

it is yours now, and its on the way!

680WHP do you know the steps needed to boost prep a nikki? If so plz email them to me at randokuky@hotmail.com

yup, and nope :)

man, this cheese spread is yummy

if you want to purchase a turbo prepped nikki please e mail me robert@rotaryshack.com

^^ Lol @ Robert. :) Thank you sir!

How much do boost prepped carbs go for

Thats fucking lame, so you wont tell anyone how to boost prep thier nikki so you can force them into buying one? Ill give you an envolpe, 2 jaw breakers, and a paper clip. gay

Him not giving out the info on how to do it is also a means to save you money by you messing up the process or something and having to go to him anyway. Atop of that, he's had quite a long time boost prepping to get it right.

I say send it to Robert, Rx7Carl, or Sterling. At least then you know that you are getting someone that has done more than one.

Well I have 2 carbs, Im sure other people than him can give pointers. Besides if the people who HAVE preped a nikki would post how/what they did then it dont see why the people who can do it on thier own would have trouble. I havent worked on a car this much ever, and i got the rats nest off just fine. the how to was great. a write up on boosting a nikki would also be great if the people would write one. but instead they force people into buying one for 100+ they spent a few hours doing.

Well the list has grown a bit, from what I have read you need to
Remove Choke/Emissions crap
2ndarys mod
stronger floats
Vent the floats
Acc Pump mod (In faq posted by stearling)
Rejet (I guess size depends on your set-up)

Ill search more and try and come up with the rest, then ill prep my own shit and do a write up for it so people dont have to buy something they dont want.

it maybe over 100 but just think what went into it all the mistake wasted nikki's to come up with a perfect tuneable and also awsome looking carbs hours they put into coming up with all that must have cost them time and effot

Oh im sure it did, but hold the how-to just to take money is dirty. Not many people turbo 12a's using the nikki carb, so its not like its a HUGE money making deal. But anyway ill sit with a few friends and fuck with it till it works then write a how-to and i wont charge a dime......

Maybe more would turbo a nikki carb if they knew how to prep em. This thread pops up at least twice a month. After all most of us are either to cheap or too poor so all they are really doing is allowing us to boost 12a's with a nikki and make some money on the side for their RX7 which I would hope anyone in there right mind would do the same. My 2 cents.

if you are going to spend time doing a turbo car might as well do it right. upgrading a vehicle with turbo takes money and effort so dont be a cheap ass and spend the extra 100 dollars and get one that will work properly. or go ahead do it yourself and blow the crap out of the motor. Get it right people pay for their ignorance , and ignorance = $ for those with knowledge.

^^^ dumbass, read my post I have 2 people that what worked with carbs for years. They just havent worked with the nikki, if fact I have already had them remove the choke, rejet to 465 (i think) they welded up the 2ndarys, Started the Acc pump mod going to finnish the rest tomrrow.


Me asking to do the shit myself isnt cheap you dumbass, Id rather save the $100 and if something goes wrong with the tuning and my motor blows, hey I have an extra 100 to spend. Id feel better know that I caused my motor to blow rather than paying a guy to take 45 min a throw shit around on my carb but forget to do 1 thin and he causes it to blow. If people would do a well wrtien write-up then thier should be any problem with how it works. Unless your a dumbass and cant follow directions.

Okay, hopefully in before the lock ...

I personally have no problem buying a boost prepped carb, except for the fact that I just had my Nikki rebuilt. Now that I'm here, and being the DIY'er that I am, I'm more than willing to buy the needed items ... I just do want to loose out on my current investment. I thought the purpose of forums and threads such as these were for enthusiasts that share a common interest to come together/help one another out. Now that you know where I'm at, give me a price on what I need to prep my rebuild and a little instruction. I guess that's yet another reason I'm really a VW/Audi guy at heart ... yeah that's just it, heart.

No one that knows how will help you bro, I have been asking for a few weeks and all i get is send it off. I too am a DIYer and just rebuilt my carb, I have everything I need for the turbo set-up but a preped carb. Im tryingto prep it with my dad and bro, Ill let you know what we did/used when i finnish if you havent already got one.

I can understand where 680whp is coming from i mean its a 100 loss for each that dont go thru him. but how many people wanna use nikkis? not many. the other 12a turbo guys already had a after market carb. maybe instead of sellign the carb you could sell a kit that has the how to and what you need. jets, floats, ect.

but anyway HOPEFULLY ill have the carb done by the end of the week. and but on over the week end, I have 4 days off work this week (yay) so i dont see it to be a prob. Ill let you know how it went and if it goes well what i did and what i used.

Roberto, him gets no cheese this time
 

First both of you chuckelheads need to realize that Robert does this for a living, he is not being rude, or anything like that, he is just stating the facts you want his service, then pay him, otherwise quit whining.

there is a reason why his screen name reads 680RWHP12A cause he built one that consistently runs the 1/4 making that much power, you pay for experience no lip service, and even though he is kind of cheesy, he is fairly reasonable pricewise, that being said, boost prepping a weber is much easier, they make more power, and it doesn't require any money to rob, or sterling, or carl to get it done, just a lot of time, money for jets, because you will try many out till you get it right, and a lot of beer.

kenn

PS Rob, don't let the head swell two much :slap:

I use a nikki modified by Robert, I've ran it up to 20psi and it works great. Don't go over 16psi on a stock 12a though, unless you like cracking the back plate on the engine, trust me. I'd suggest buying a nikki from Robert that will actually work right. But if you want to try prepping it yourself have fun detonating the shit out of that engine.

Hmm ... I thought I remembered saying I was willing to pay for what's needed to prep the carb. I just don't see the point in paying for a rebuilt carb, when I already have one. I also don't see where name calling is needed ... if I knew there were 17 year old kids like you on this forum I would have gone elsewhere (like maybe the street racer fourms where we can bag on each others neon lights). Besides, you obviously doubt your own skills, but I feel more than comfortable prepping/rejetting a carb. Thanks.

Kenn-Chan has been around rotaries many years so why the cheap crack about him being a 17 year old kid, he has one of the best first gens produced.

If you run a draw-through turbo setup, you don't need to boost prep the carb. I am looking at doing a draw-through once I get my car running better.

well if you re-read my post I said id buy a "prep-kit", If something were to go wrong then id be less pissed if I did it other than some guy miles away that fucked up my carb. Besides I know I can prep the carb, I just need to know what needs to be done. Yes he is being rude, I thought the reason for an rx-7 club was to share info on how to make your car fast, better looking, and to bagon other peoples neons. NOT to hold out info on turbo preping the stock carb so you can make you money. Im not looking to make 680hp or any huge numbers off the turbo so I dont see why id pay a guy 100+ to prep my carb. Im sure webbers, holleys, and other performance carbs are easy to prep but were not asking about them so that info was useless. Im sure ill have trouble preping my carb just like all the other did when they were doing thier first one. If my motor blows oh well, there not to much $$.


I just think coming here to hold info to make yourself money is lame, even if you do own a shop.

Exactly, if 680whp's shop boost preps carbs, why not sell a prep kit? You'll probably make more money just from the retail mark-up than you would have on your labor charge, and you'll save yourself the hassle. Work smarter, not harder. So, how much for the boost prep kit?

I disagree. Rotaryshack is a commercial operation. As such it needs to be profitable. Robert is a member of the forum and often gives free advice, in fact if you go to the RS website there is a free technical advice service. To expect him to pass on trade knowledge for items when he is operating a commercial business is unrealistic. I have never done business with Rotaryshack because I live 12,000 miles away[at present far west of China] but Robert has given me sound advice over the years.

There are members whose hobby is rotaries, if it.s a job for anyone with mechanical skills then I am certain they will have the time to write up a three page explanation of how to do it. Perhaps if you end up doing it yourself, I suggest writing up your experience and get it posted as a sticky so other members can gain from your experience.

Writing up is a difficult task, I could write up a brain operation in three pages or three volumes depending on the existing knowledge of the reader. If you miss out a step because you think it's obvious, then they can be a disaster if the point is not in the person's knowledge and they miss out a critical step.

Occasionally, a little brain surgery here wouldn't hurt.

perhaps brain surgery would fix the fact that 2 members here can comprehend the fact that one needs to make a living. But as you can see from the begining of the postings this guy randokuky was taking cheap shots at robert not knowing him first as a person second as a business man, i been dealing with robert for a while and he will give plenty of free advice but like others foremention why would you give away your trade that seems stupid to me. yes this forum was created to give free advice between members but as you can see they also allowed merchants to come here and sell their products so take it for what it is. maybe if you ask him he will sell you the items needed to do the preping but why would he? once again we pay for our ignorance and so will you. deal with it.

"why would you give away your trade that seems stupid to me."

If this is true why would he give any advise? Why did the person who wrote the rats nest removal do it? I mean youd have to know ALOT about the rats nets and what makes it work befor you just go off and remove it. Stearling another guy who mods the nikki and charges for it posted a mod THAT HE DOES TO THE CARB HE MAKES, that helps people with the 2ndarys mod. saying he shouldnt post it cause he makes a few bucks (witch is far from a "living") is retarded. So I assume it was that persons "trade" and he was cool enuff to post the how-to. Not just say "hey I know how to do it, ill do it for you for $100+" compairing a brain operation to preping your car is pretty useless, I only want to prep my carb myself because I know I can. If you have never rebuild/worked on/been around carbs be4 then it sould be sent off and done for them selfs. I dont have to know people "as a person" when they force people into doing carp that they dont want. Come on have you even read what preping a Nikki for boost makes it run like? one word SHIT but it takes boost, now why the shit would I pay someone to make my carb run like shit?


And like I have said 100 times be4 if he fucks something up and it blows my motor, then what? I call him 1,000 miles away and say "hey you fucked my carb and blew my motor" Its not like hes going to agree and buy me another......Now how much for the boost kit?

A boost prep kit is not going to happen. Robert spent a lot of time and money figuring out how to make the nikki carb work with boost, and he is probably one of 2-3 people that can prep the nikki and actually have it work. I have been getting parts from Robert for a few years now and he has always given me a good deal and good parts. $100 is not a lot to spend for a carb that will work perfect with as much boost as you want to run. Either buy a carb from him or figure out how to prep them yourself.

I run a stock 12a with 13psi on one of Roberts nikki carbs, and I can tell you it doesn't run like shit if you know what your doing. My car runs great, good throttle responce, 160mph top speed(run out of gear, not power), and decent gas milage for how I drive it.

^^ :cookie:

Ill save the 100 thanks.