BlackR1

S4 stock port motor (87)
pinneapple sleeves
ducted/shielded intake
rb race headers, straight through single 60mm exhaust/piping
HKS twin power ignition
turbo II AFM
S5 LIM+UIM+TB
Exedy Hyper Single Clutch
Turbo II drivetrain (clutch, tranny, rear end)
Cusco 2-way LSD

this is all I have planned for my NA as far as power goes, comments, critiques, and any other suggestions for reliable power are welcome

With my bench racing estimates, im figuring around 165rwhp

Roy James

You shouldnt have to use a a high power ignition, you are only pushing like 190HP if that. Other than that looks good, you may or may not see gains using the S5 manifolds, you better have it accuated with an air pump for it to even be considered useful.

BlackR1

Yeah i've been hearing mixed comments on the S5 manifolds, I heard its more beneficial to just run S4 manifolds and a turbo II AFM

1987RX7guy

iTrader: (3)

why do you want the TII tranny? you probably wont even need it.

Roy James

BTW love the avitar, holy **** that bitch is fine.

Anyways, yeah, i hear that all the time too, but im on my 3rd N/A tranny, they are ******* worthless. All my freinds go through them like butter too, cheap weak POS synchromesh bullJack

BlackR1

I want the beefier TII drivetrain so it will make for a simple swap for whenever this stock engine goes out. I also want the TII drivetrain because the stronger rear will take more abuse-- LSD is a must for me. AFAIK, most of the aftermarket LSDs are for the TII rears.

(i've already been through one NA tranny as well)

1987RX7guy

iTrader: (3)

Well I am only into the first year of my FC and I have not realized that they are a POS but i guess since you all know it from experience.

BTW hey name is VIDA and she is a loan officer and CUBAN I love bieng Latin

DomFD3S

Cusco 2 way LSD huh? (KAAZ makes one for the FC, but it is 1.5 way. Although I was speaking to my friend at KAAZ and he says that they have a conversion kit which should be able to change it to a 2 way). Is the driveshaft the same size (NA versus Turbo II)?

I think I may pick up an Exedy clutch also.

Rotary Racer

I hate to tell you but you are not going to be able to get 165 rwhp with a stock S4 block. You are looking at porting and upgrading the rotors to S5.

BlackR1

ahh well, no biggy, it's just fuzzy bench racing estimates. What kind of rwhp have people seen with the stock block?

Zach McAfee

Best I've done is 147rwhp, and it starts to drop after 6800.
Mods: RP50 Cat Back Exhaust, RX-7.com high flow cat and downpipe, RX-7.com high flow intake, Cold air box, RX-7.com street/strip clutch, Rebuilt secondary fuel injectors, MSD6A Capacitive Discharge Ignition, 2 Blaster Coils.

1987RX7guy

iTrader: (3)

I would think that 150 whp would be attainable on stock ports with no accessories and no emmisions. Just my oppinion though.

DomFD3S

Nice!!!! I think I feel the need to fill out some loan paperwork.

1987RX7guy

iTrader: (3)

j200pruf

iTrader: (4)

To get 160rwhp out of a stock S4 block, I think that you will need a different intake minifold with either carbs or idvidual throttle set up.
Cuz if Hitman got 175 out of a mildly street ported 12a, then I think 160/165rwhp would be doable with a 13b w/ S4 rotors.

13bpower

I would suggest to go with the ported s4 intake manifold. With a good engine and tuning I could see 155-160 rwhp. Light weight flywheel would make a noticable difference. Light wheels would help out as well.

BlackR1

hmm sounds good, i think it should be fairly easy to find spare manifolds to port n play around with...

as far as that hot latina... i'll switch roles with her...

i'd love to 'check her credit' if you know what i mean

BDoty311

If you are looking for highest HP, you might want to consider removing the 5th/6th port actuators altogether. Those ignition mods probably wont do very much on a stock port motor, or even a streetported motor for that matter. Instead of that you should invest in an SAFC.

Rotormax_4169

what are the benefits of swapping the s5 AFM? i have never heard of that one, but would be interested to hear how it goes!! from what i hear, as long as you have VDI in the s5 intake manifold accuated some how, it should be good for at least 10+. i have been trying to do this but i cant find any spare s5 intake setups( if one of you are holding out, please pm me, id be glad to take it off your hands!!! ) anyway, check this out for reference.


http://homepage.mac.com/carldavis/intake/intro.html

good writeup!!

Rotary Racer

Lets look at some facts.

- Stock crank HP of the S4 is 146
- Stock crank HP of the S5 is 160
- Kevin/RarestRX’s GTUs stock S5 block with down pipe, HKS cat back, intake he put down 140 (give or take I don’t remember the exact #)
- Sully’s rx-7 street port S4 motor with S5 rotors, no emissions, RB header/pre-silencer, don’t remember what cat back but probably RB, stock intake box, 6th ports tied open (by me ) he put down 160ish (again don’t remember the exact #’s off hand)
- An article Jim over at racing beat sent me from Drag magazine street port S4 motor, RB carb, RB race pipe, 12a dizzy lots of gas put down 220ish crank hp.

So judging by your current set up you were thinking about running stock S4 block, S5 intake, race header, I would assume intake of some sort, and ignition you will probably put down 130ish to the wheels.

It all depends on your budget and how much tweaking/mechanical abilities you have but a carb or after market EMS should be in your thought process if you wan to make the power.

Roy James

Use the money for the ignition to put in an S-AFC instead. The gains will be better not to mention gas milage as well. Keep us posted

BlackR1

i'm not really looking for massive horsepower gains in the car...just enough to make it kinda peppy.

I've got plenty of fabrication skill, but not really willing to throw *too* much cash into it-- not just yet at least.

I'll most likely get a dyno run/comp test in sometime soon to get some base figures for the current state of the car. Thanks for all the input, i'll post up the results as I find them.

BonsaiRX7

makes me sad that my n/a has no potential. BUT I LOVE HER!

BDoty311

Hey Roy, what kinda gas mileage increase did you get? Im curious because I might actually buy one finally for my n/a and havent even ever thought about the mileage increase.

marcus219

I have a complete upper intake manifold and lower IM for a S4 for sale..