Hey guys im new to the forum and kind of new to the RX7's. I was curious on what kind of streetable power the 12a can make. Ive looked through the dyno and engine building sections but havent seen what mods really create power in these motors. Also how much power makes this a fun little dd?

if you dont mind loud car. get a holley 600, Racing beat intake manifold, good headers, and a bridgeport.



if you want it more quiet...a street port, or even no porting will be good enough. just do the above mods minus the porting.



if you want to go wild, a Peripherial port on the street cars has been done.



if your not sure what these ports are. do a search on here. its all there...

Well i looked into the porting and was deciding between an agressive street or a bridge port. I want to add a new carb, a ported intake manifold, ported headers and exhuast along with a msd ingnition with a fc radiator. I would really like to put 200hp down on the pavement but looking to be streetable. Are those numbers achievable with that kind of set up or am i just dreaming? I appreciate the info.

All those are possible and get some serious numbers on a first gen (remember the chassis is less then 2600 lb) but another why to go and I think the more reliable and fun way is a low boost turbo or a supercharger. you will see the same or better numbers and the added benefit of a smoother dd. REMEMBER these little cars made 100 bhp origonal power, so if your going to tack on another 75 to 100 bhp you really need to think about the suspension and the brakes because the car wasn't made for that extra stress and it will show with the extra "go" https://www.nopistons.com/forums/pub...#>/BURNOUT.gif factor. But to answer the question directly



a light weight flywheel~300.00-600.00

header~250.00

upgraded emissions (modern high flow catalytic converter w/ smog pump)~ 300.00

a weber dcoe, ida 48(which I have), or a holley 600 (will need fuel pump)~700.00

short shifter~200.00



total is approx. $2,000.00



That will give you alot of "go" about ~ 130 rwhp which is around 150~160 bhp



Another thing you can do and I heavily suggest is trying to find way to drop some serious pounds on the car. if you can get it down to 2100 lb you would find that those 150 horses will put a real smile on your face.

I agree the lighter the car is, the faster it is. It will corner better and have quicker stopping distance also..



I also like the low boost turbo idea ( like 5-6 psi ) I think the turbo will make better numbers. plus I think you will "feel" the power of the car cuz of the torque from the turbo..



You can find a stock FC turbo for like $50-$100. A basic rebuild kit is like $50 for it.

You have to make a 12A turbo manifold but thats prolly the hardest part..



you can turbo a 12A for cheaper then most people think... Just look at the stock turbo setup one the Nissan turbo 300ZX (Z31)

It has no intercooler or blowoff valve.. Not saying I would run it that way, But thats the way they came stock and it worked....

turbo does always seem to be the best route.



but tuning with a carb and boost can be tricky. and converting it to fuel injection just isnt worth it. much easier to drop in a 13b. a stock S5 (89-91) NA with a holley or some webers, will feel great in a 1st gen. especially if you drop some weight!



but if you want to stay with a 12a, and be streetable. maybe some nitrous is in order. a 75-100 wet shot would feel great! and you dont ware on the motor unless your spraying it. thats a good daily driver feel until you open that bottle.

True that! Nitrous is by far the biggest bang for your buck, and it keeps it as streetable as it's going to get...



what are the chances of detanation when running enough nitrous to get 75-80 HP..????

not sure...but either going to run a 50-100 shot on my stock un-rebuilt 12a. we'll see how it goes.



just make sure its a wet shot. im going to tap the priamary, or the secondary runners (not sure wich yet) on my RB manifold. so its a direct port injection. i think it will hold up nicely. just be sure to retard the timing a bit. it would be better to have an MSD 6btm. but im going cheap and will just turn the dizt. back a little....lol

a stock block 12a flows enough to do about 150hp flywheel

a "street port" will do up to about 180-200 depending on the size and quality of the porting

a bridge is capable of 250ish, but its really dependant on the size and shape of the bridge



if you wanna do about 200hp down, you're looking at a really dialed in street port, or a mid sized bridge.



my numbers are old, its prolly possible to beat em nowadays, people are running larger exhausts, you can get efi, bigger than 51mm etc etc

Thx for all the info. As i do want to stay 12a and carbed. What would be one of the better carbs to supply alot of power and torgue through out the power curve? My next project after this will be boosted. As for the suspension i want to swap the entire rear end to a gsl-se, put tokico blues and possibley rb springs. As for the brakes i would like to do stainless steel lines with hawk pads and better brake fluid. The nitrous would be great but im looking more for an autocross car. I will be living in indiana when this gets done so i wont have to worry about the emissions. What is a good wheel and tire size? I was looking for 15/7-15/7.5 work emotions.

Here are some pics of the car. I picked her up for $800 with a blown oil cooler. Had 27000 miles on her.



Attachment 18520



Attachment 18521



Attachment 18522



Attachment 18523



Attachment 18524

This is where the oil cooler busted.



Attachment 18525

a holley 600 is always good. but some people go with the holley 450 (i have a spair if you go this way)



webers, del'orto, and mikuni style carbs are the ****, but exspensive and way harder to tune. but have more precise tuning.



if you convert to GSL-SE rear, you might want to convert the front too. the lug pattern is different. so your rims will not match. 4x110 non SE cars.....4x114.3 for SE cars.

an SA, just like mine. but yours is in wayyyyy better condition. lol



27000!!!!! wow!!! thats some low milage!!! especially for an SA!



you would neeevvverrr see one like that here in Orlando! especially not for no 800!



nice find!!!

haha thanks on the comments. So it seems like i have a pretty good idea on what i want to do. Again all you guys been alota help. Thx

that IS a nice SA.



um just on you suggestion list, skip the hawk brake pads, hawk = crap, ebc is good, carbontech is better, hell even stock is ok. hawks are really hard on the rotors, and then all the hot metal coming off the rotors from the hawks, ends up all over the car, it usually ruins the wheels.



step up to the tokiko illuminas, they are a little better shock, although the blues arent bad at all



for a mild setup (stockish port) a modded stock carb and good exhaust, works well. the stock carb is on the small side, but it is actually a good match for the stockish engine. the carb does need to be rejetted, as it runs too rich etc



15x7 wheels fit, 7.5 should fit in the back but it'll be really tight, so measure carefully



so a car setup like how you want it is FUN, so enjoy

I have been told that a 16 inch wheel will fit with 40 mm offset and 7 inches in the front 8 in the back with no rub.

If your doing auto-X, I'd consider a Sterling carb. Plenty of flow, about 475 cfm if I recall. A lot of people say the Holleys don't like going sideways.

yeah the holley's dont like high g turns

yeah...holleys do bog on hard turns. but they have a float and bowl upgrade for circuit use that elimintaes that completely.



i have the stock wheels on my SA with a 245 in the rear. no rubbing. bu8t i have the FB stock wheels and 83-85 LSD disc brake rear. dont know if that makes a difference...



245 is, thats 9 inches i think? (thats what she said...lol)

I have had almost every port cofigueration minus PP and full Bridge. Stock is cool up grade the carb fuel system and exghaust. conservative street port, nothing super special. better sound better power of course, still kinda mild. Big street port good I like it its what I have now. good tourque if u will. Pulls hard to 9k. half bridge is SWEET, the sound brap brap brap brap killer top end lots of fun! Gas mileage sucks but to me its worth it. So to sum it up if fuel mileage isnt an issue go half bridge. I hate makeing Hp clamis but I wana sa with a sweet tune 12a Halfbridge all motor 180RWHP???maybe a bit higher. I never got mine dynoed? A close seconed would be large street port verry driveable an hp can be real close.

the full bridge tuned right will do 210+ rwhp, my friends 13b bridge did 230@9600. it did brap, but mileage was fine (26freeway)....



my next car is getting a PP motor, so we'll see how that is...

I needed some experienced advice on this matter. Thanks J9. https://www.nopistons.com/forums/pub...IR#>/smile.gif

If you wish to see some dyno result sheets and mods, you may want to look in here to give you a rough idea of what people are running:



http://www.rx7club.com/showthread.php?t=658265

Ty <3



Oh wow GSL-SE's really push 130~ stock? Shiza. The PPort dude running 164hp...I'm guessing that has to be a very irritating problem...

Well ive been reading up about the sterling carbs a little bit and it def sounds like more the direction i want to go in. I def want to autox and the weekend cruise/spirited driving. What is the normal pricing for a a motor pull rebuild, bridge port and reinstallation normally run. Ive been trying to get into contact with the only & shop in our state but havent heard back from them yet. Im really hoping to get this into the shop withen the next few months.

The Guy with the PP port is running a really restrictive exhaust which is what's really killing him, plus he was undercarbed if I recall correctly.

If I was him I wouldve cut my muffler off and richened the mixture a whole shitload for **** and giggles just to see if the dyno would spike...

Hey guys. Just joined the group over here. I saw this thread and thought that I would "chime" in. I am running a 12A blowthrough in my 83 GSL with a stockport at 10psi with a boost prepped Nikki that is about 200rwhp. In these little cars, that much hp can get you in trouble. I have about a grand in doing my blowthrough, but I made all my parts and did all the work. Here is a couple vids to give you the potential of the 12A https://www.nopistons.com/forums/pub...#>/biggrin.gif.



http://www.youtube.com/watch?v=PNG6JRoqXu8...feature=related



http://www.youtube.com/watch?v=bMO1X6hRfNg&feature=user

I like the Star Wars style title page.

sam is a good frigging dude. Nice to see you off the evil board and on this one https://www.nopistons.com/forums/pub...IR#>/smile.gif

Thanks Ben. I've looked over here a few times, and I thought that I would try these guys out. I hope the drama stays away from here!

no it dosnt.. and i believe you payed me to turbo prep you nikki so you did not do everything yourself https://www.nopistons.com/forums/pub...IR#>/smile.gif



another 12a turbo nikki under the masters belt





i believe my first 12a turbo nikki was born on 1-7-95



i have also made the highest hp with a turbo 12a blowing through a nikki bck in 98, it was 540 rwhp to be exact



you can get alot of hp out of a 12a, my last dyno session approx 5 years ago netted 730rwhp



since then i have been limited to working on my car as i struggle to keep up with bussiness as bad 83 cat confirm..

im going to be here alot more so if anybody has questions, i have tons of expierience and am here to help!

Actually the carb that was sent to you took 5 months to get back, and it was so poorly done that I couldn't use it and wound up using another carb that I boost prepped myself. So like I stated earlier, I wish the drama would have stayed over there, but since some people can't tell the truth, then I guess the drama continues. This is why I do EVEYTHING myself, becuase people like this think they are the only ones who can do this.

They can't tell the truth cause it would make them look bad...unless they have cajones.

*SIGH* https://www.nopistons.com/forums/pub..._DIR#>/doh.gif https://www.nopistons.com/forums/pub...DIR#>/Wow1.gif

here is a short video of a 12a turbo with a nikki blowthrough setup



http://myspacetv.com/index.cfm?fuseaction=...p;videoid=22340

your Robert from rotary shack???

yes sir that is i......

p.s. nice rotary collection you have!

I have talked to you on the phone a couple of years ago? anyway are you doing that on a stock rear?

no way!! its a built ford 8.8 , 33 spline axles lightened spool, c-clip eliminators wilwood disk brake kit rear main cap girdle.... its bullet proof



i went low 11 sec passes on the stock rear end geard up with 4.88's but i did twist lots of axle shafts