Logicalbomb

iTrader: (1)

4 point rear strut bar ULTRAracing
4 cross slotted & drilled rotars
F&R ULTRAracing sway bars
Full poly urethane bushing set
ULTRAracing quarter panel chassis reinforcers
ULTRAracing under arm reinforcers
Autopower mid-rear roll cage
Tein coilovers
Racing Beat Headers
Racing Beat full cat back exhaust
APEXi Electronics - POWER FC
MSD ignition system
Venom Fuel Injrctors
Rising RPM fuel rail kit
Megan Racing Tie Rods
High Performance Braided Brake Lines
Brembo or Endless Break Calipers
Cusco 2 way LSD

Currently that is my list of to do parts. However, I will need a little help on this from the more experienced. My goal as stated in the parts above obviously is track times not drag racing. I am however thinking of keeping the engine that we bridge ported and put in N/A and trying to juice the most N/A power out of it I can. It may actually be more price efficient in the long run seeing as I am just looking for around 300hp (on this motor, I plan to replace in a 3-5 years). Currently my motor has 32k on it and is running like a champ aside from throttle hunting while it hasn't warmed up.

Give me your thoughts on what to add to that list. If you have any good ideas for boosting HP on a N/A 13B 4 Port lemme know! I am crossing things off this list as we speak because they've been ordered.

Crispin38

iTrader: (3)

Can u run Power FC on NA?

Logicalbomb

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Good question! I would like more flexible air/fuel control but am not sure which one would compliment an N/A the best. From the description of this product I got the impression that it was directly swappable for the ECU with no harness modifications and was not boost dependent.

Aaron Cake

iTrader: (1)

Your exhaust is too restrictive to make 300HP on a bridge NA.

You'll need to ditch the S5 upper and lower intake manifolds and move into something with a set of short, straight runners (such as an ITB setup).

Invest in some earplugs.

You're going to need to properly build this engine to spin to the RPMs it will take to make 300HP NA. Fully balanced rotating assembly, TII hardened stationary gears, three window stationary bearings, deep groove rotor bearings, rotor gear pinning, lightweight flywheel, scatter shield, TII oil pump w/shimmed regulator.

Since this is a track car, I'd suggest going with a full standalone that totally eliminates the stock engine wiring harnesses. Haltech, Megasquirt, etc.

Logicalbomb

iTrader: (1)

I love you. That was the most comprehensive non-BS answer I have ever gotten related to this topic. Most people ridicule for wanting to stay N/A but the leap to turbo seemed a little too steep and troublesome seeing I let my build reach 32k without adding boost.

I have a lot of research to do regarding this build and I seriously can't thank you enough. I do have TII hardened stationary gears in there along with a TII oil pump. I also have a 92psi walbaro fuel pump in there right now as well, it is a S5 TII 4 port motor.

nvmarx

iTrader: (1)

as arron cake said you will have trobble getting 300hp out of it with out alot money. my s5 high comp 13b peripheral port may not make 300hp and that has everything arron has listed plus more it is a race engine. not to shoot you down or any thing but if you have the money go for it man! o and teins.. do abit of research on coil overs i have use teins befor there are way better options out there that are cheaper! good luck man

Aaron Cake

iTrader: (1)

Well for the record, I do think it's silly to try to make that power in an NA engine. Unless your racing class stipulates NA only, that power is easy to make reliably in a turbo engine that still will drive like a kitten, be quiet, and get good fuel economy.

S5 NA rotors? If you're using TII rotors you are leaving a lot of power on the table.

Logicalbomb

iTrader: (1)

S5 NA rotors? If you're using TII rotors you are leaving a lot of power on the table.[/QUOTE]

The motor I have in there is a complete 4 port TII rebuild. It does have TII rotors in it, and I even upgraded the fuel pump and oil pump in anticipation of boost and matching whats in there ETC. The only thing non TII on my car is the ECU, Rear End, Tranny, and body of course because that is an 86 SE.

I went with the SE body because it doesn't have power anything, no steering, no locks, no windows. I didn't want all that extra fat on a car that I want to build so I can lap a track taking corners so tight they make my butt cheeks hang on to my seat for dear life.

Me and my buddy did the exact same build at the exact same time and his car at 19psi put down 485 to the wheels. My turbo however never came to me due to someone thieving me out of the money I had put down for the entire setup.

Logicalbomb

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Also I am wiring a fuel cut off switch in to my car today because it runs rich as ****. I never swapped out the secondary injectors I had intended to use under boost. Now my car shoots flames when I am decelerating and has often been compared to "smelling like a snow mobile". Doesn't surprise me since technically it is a 2 stroke, but still lots of commenting on how rich the mixture smells out of exhaust.

Logicalbomb

iTrader: (1)

apologies for spamming my own thread here but I also forgot to mention not only is it a 4port TII with matching internals we installed 3mm 2 piece ceramic apex seals. I did plan on making this engine a power house. We had to do a lot of modifications to even make it run N/A for the break in before we went turbo.

MrGoodnight

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Your halfway through, why not finish the turbo conversion?

Logicalbomb

iTrader: (1)

I honestly feel that is the way I will be going, thinking of the pros and cons in it I am subtly coming to that realization. Although I like the raw unbridled power of a properly made N/A engine I have to appreciate the practicality of a well built turbo. Being able to tune your horsepower and MPG from the cockpit of the car is a pretty alluring idea.

lastphaseofthis

iTrader: (8)

APEXi Electronics - POWER FC<-----more expensive then nessesary
MSD ignition system<-----don't need.
Venom Fuel Injectors<---- Crap.
Rising RPM fuel rail kit <--- don't need.

i could make suggestions, but as others have said, go turbo, or stay N/a and shoot for 200. you can have alot of fun with a well built 200hp street n/a.

My $0.02.

Aaron Cake

iTrader: (1)

The low compression rotors are going to be a major limiting factor then. You're missing out on 1.3 points of compression. The rotors are heavier, and without balancing I would not be taking them to 9,000 RPM very often.

Logicalbomb

iTrader: (1)

I do not know how well the rotors are balanced, I shift around 8.5k if I am giving her hell but the rev limiter isn't removed yet. I feel like the final steps on this are something I will take in to a professional shop to have the turbo part done. I have learned a great deal of mechanics from my RX7 but I don't feel that boost is something to be taken lightly when it comes to the longevity of your engine.

I think your responses have enlightened me to just save up bite the bullet and pay for my car to be properly tuned and turbo charged. I am sure this will end in me switching out for a TII tranny, driveline, and a 5 lug rear end conversion I have been avoiding.

steevo_102

I hope you keep it NA as I'll be taking the same route, ill be keeping an eye on this thread.

I see your going bridgebort, can you school me on streetports, bridgeports, half bridgeports, differences, cons and benefits on each? Sorry for the clutter on your thread bro.

Logicalbomb

iTrader: (1)

I already have the engine bridgeported, the difference is going to be between engine longevity and streetability. I went with the highest port job I thought could pull off longevity and streetability. However it looks like I will have to mod a lot to keep it N/A since I did originally start this out as a Turbo II build for high boost purposes. However, I really am a fan of N/A power and AaronCake really enlightened me on the avenues of possibility when it comes to making some serious power N/A.

steevo_102

since your using TII rotors your almost ready for a turbo setup, but if you plan on building it to NA specs those rotors are gonna have to be swapped out.

Its like if your right at the fork of a crossroad, TII, or N/A? Take your pick.

Logicalbomb

iTrader: (1)

I am already looking for TII upper&lower, downpipe, exhaust manifold, intercooler and piping, oil catch pan, and fuel management system.

Logicalbomb

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Well thanks for the help to everyone that has contributed, you really gave me a lot to think about and I rethought my rebuild list.

The new thread is at "86 FC S5 TII rebuild list need help" if you're interested in following the progress or new plan for my FC.

Again, huge thanks to all the kick *** members at the RX7club!