WhiteBoyzRacing

my friend has a s5 motor and tranny and harness he wants to sell me for 1,300 he said its a 6port whatever that means, i was wondering if its worth it and if its better then my 4port(does it give out more power?) and is it worth swaping that in my car? thanks guys

JWteknix

iTrader: (2)

keep the 4 port

RB_eater

iTrader: (1)

6 ports = N/a
4 ports = Turbo = More power

And seeing that the title of thread I'm going to assume you have a S4. Putting a S5 engine into the older S4 chassis isn't worth while, the whole ECU and harness must be changed.

jasons7

4 ports give out more power simply b/c it is turboed. 6 ports are N/A and will not reach the power of a 4 port. At least not without a lot of work and money. Meaning doing an N/A turbo. even then you might not get the same power .

phoenix7

ummm, for that amount of $$ you can buy an J-spec motor/tranny.

how about you post what kind of car you have, year, model, engine, IMPORTANT STUFF!!!!

so far all i know is that you have no clue what you're doing/asking and you expect us to help you even though you have not provided us with any concrete info.

I don't know if your friends and family LOVE asking you a billion questions in order to get the whole story but we appreciate it when you are thourough AND TO THE POINT IN YOUR FIRST POST! We will not ask:

post 4:"What kind of car?"
post 7:"and then?"
post 100:"and then what?"
post 150:"OMG what else?"
Post 1000: " OMGWTFBBQ!!!what kind of underwear???"

come on guy!! put SOME effort into it.

Sideways7

iTrader: (7)

Ok, what model car do you have that has a 4-port? If its a turbo, then his engine basically won't work with your car. If its a GSL-SE engine then your car must be a 1st gen, so it will take a good bit of work to make it work.

RB_eater

iTrader: (1)

All RX-7 that came with the 13B N/A are 6-port (including the GSL-SE), Only 12A's were 4-port.

WhiteBoyzRacing

ok my bad guys im new to the rx7 sorry, this is what i have(what i kno lol) 1987 rx7 1.3l n/a with a 5spd tranny, its a 4lug and not a 5 lug if that makes a diff? it doesnt have the adjustible suspension ( dont kno if that matters ) i think its just a base model as it only said rx7 on the back of the car. my friend said my motor is a 4-port and he just told me my motor only pushes out 146hp and his motor is a 6port out of his 89 rx7 and it has 160 something hp and that his motor is better then mine, and me not knowing anything about these cars and him bieng on his 14th rx7 i look up to him for advice, maybe thats not such a good idea lol, i just wanted some more power, i askd him about a turbo but he told me i cant turbo my motor. but anyways thats what i have. thanks guys

Aaron Cake

iTrader: (1)

Your engine is a 6 port engine.

Swapping a S5 engine into your car is a royal pain in the ***. Not worth 16HP.

nukeall

so the 6 port is useless?

WhiteBoyzRacing

ok kool thanks, know i kno i have a 6-port i wonder why he keeps telling me i have a 4-port lol

does any one kno any good websites to get aftermarket parts and oem parts for these, i live in newyork and there is nothing over here that i kno of and none of the junkyards have these cars =(, anyways thanks alot guys

flyinloww

the early carbeurated 13b engines are 4 port but as far as I know all the NA fuel injected engines are 6 port.

phoenix7

as I said earlier: you can buy a Jspec motor for a little bit more. You'll have to do the same PITA wiring but you'll have 200hp and the ability to get ANY amount of HP you want (300-500hp). tell him "thanks, but I'll pass"

He's prolly trying to get a Jspec himself and is trying to sucker you into buying the NA so he can get his motor. <------that's me being pessimistic so don't assume it's right.

the 6-port is NOT useless. It's just not a cost-effective swap. he needs to rewire the engine harness, modify the body harness to fit the new S5 ECU (among other parts), then troubleshoot it (i doubt it's going to be a perfect swap, not an insult at all but it doesn't seem like you have a lot of experience) ALL for a meager 20flyhp. Useless? NEVER! Cost-effective? not at all.

WhiteBoyzRacing

i saw a jspec on ebay from canada for $1,500 but i dont have the knowledge to do a swap in one of these cars, i was a big vw freak before i bought the rx7.

he actually just dropd in a LS1 motor in his rex and hes tryn to get rid of the motor and tranny and the other stuff he has, i might actually buy his mirrors that have the air passage in them for $80.

nope i have no experience with these cars i have had mine for about a month now. i love it but i need more power lol, but i dont kno where to get any aftermarket parts for these cars. so i do have a 6-port correct? thanks again

phoenix7

if you can follow written instructions and you have the needed tools then you can do the swap. I HIGHLY recommend staying with the same series (s4NA with S4TII motor) for plug-and-play simplicity though.

WhiteBoyzRacing

oh yes i have the tools and i can follow instructions i did alot of motor swaps in my golf gti till i was happy with the vr6 swap i did, how do i kno if its a s4 or not? and do you trust those people on ebay selling those jdm turbo motors? i just dont want to buy something thats no good. thanks man

phoenix7

If you can do a swap into another car and the wiring then you can do it. I don't consider myself a genious and I did just fine.

I don't trust anyone so your best bet is to search the forum for people that have bought JDM motors ( I started with a USDM TII so I have no experience with JDM motors/suppliers/problems etc. etc.) and also search the GOOD GUY/BAD GUY SECTION.

as far as being able to tell which motor is which: there are a bunch of things, OMP(oil Metering Pump), the housings, CAS?, umm, I can't think of all the things but do a search and be patient. you might find a buttload of useless threads so your best bet is to read a lot. Sorry I can't be more helpful, I'm leaving the rest for the S4 guys with more knowledge.

WhiteBoyzRacing

Thanks alot bro for all your help, greatly appreaciated.

phoenix7

no problem, have fun. If your eyes don't look like this after searching, you haven't searched long enough.

ericgrau

iTrader: (1)

Your engine has 2 rotors. So you have 2 intake ports, 2 exhaust ports. That's 4 ports. You also have 2 auxillary ports (which are intake ports, I think). That's 6 ports. The auxillary ports open at high rpms to let in more air earlier, essentially changing the "valve timing" (rotaries don't need valves to let air into the intake ports, but it's the same concept). It is similar to VTEC, which changes the valve timing on a piston engine. You would lose 25 HP without the auxillary ports. The auxillary ports are exhaust backpressure activated in the s4 (your car) and air pump activated in the s5 (his car). The s5 has more power thanks to its VDI (see below) and thanks to its higher compression, higher redline (8000rpm) rotors.

Performance parts:
www.racingbeat.com
www.rx7.com
www.mazdatrix.com
Among others. You also might be able to find used parts through these forums.

Start with a full exhaust include a performance catalytic converter. Racing Beat has a really good cat back. Once you replace the catalytic converter you might not have enough backpressure to open the 2 auxillary ports (a.k.a, "5th and 6th ports"). Use this forum's search tools and/or www.aaroncake.net to find out how to test your aux ports and how to open them via air pump instead of exhaust backpressure. After all that a full exhaust should give you close to 25HP, mostly from the catalytic converter.

Next you can install a cold air intake. First get a cone intake from one of the above links. Then build a box around it with a hole to let in outside air but block underhood air. Be sure to seal the seams well. Search the forums for examples. There aren't any premade cold air intake kits made specifically for RX-7's. A cold air intake should add around 7 HP.

Finally you can install the VDI (variable dynamic intake) from an S5. Search the forums for more info. That'll probably add a couple HP plus more power at low rpms. Then if you switch to Royal Purple motor oil you can gain about 3 HP.

Also look into suspension upgrades for handling. This includes springs, shocks, sway bars, tower braces and suspension bushings. Also do a search on "DTSS". If it's broken you'll need to replace it or install eliminator bushings to get rid of it. Your old shocks and bushings might be worn out. Beyond simply replacing those, you can also buy stiffer shocks, springs, sway bars and bushings. The more stiff those are the better your handling will be but the rougher your ride will also be.

phoenix7

good, quick rundown. about the 3hp from royal purple, but overall a good post. Search for all those things and eventually look for the "beefy NA" thread.

ericgrau

iTrader: (1)

Royal Purple claims lower friction for a 2%-5% increase in horsepower & gas mileage (5% in smaller, high revving engines). Various outside articles (magazines, etc.) confirmed this. Racing Beat confirmed a 2% increase in horsepower from Royal Purple in rotary engines, noting that other synthetics didn't increase horsepower when they tested them.

WhiteBoyzRacing

lol

WhiteBoyzRacing

kk thanks alot ill check them out, as for the exhuast, i removed one of the pre cats and the main cat and just put a pipe there but i left one of the pre cats, was that a bad thing to do?

know what is this VDI for?

is a single exhuast better or a dual exhuast for these cras?

ericgrau

iTrader: (1)

I used to have an RX-7 with the pre-cat removed and it ran pretty strong. A friend complained that my old one felt a little faster than his. So I presume the 5th and 6th ports were still opening. My old one still passed smog, but not by much. If you removed both cats, then you need to do a search to figure out how to activate your aux ports via air pump. Until then you've lost 25 HP and gained 15 or so.

VDI: Do a search. I don't understand it too well myself. It varies something in the intake according to rpms or some mojo like that. I dunno.

Single or Dual Exhausts: Doesn't make much of a difference, I don't think. Supposedly dual are slightly better.