Brayden89

I searched and couldnt find it on a First Gen. i know ive read it before on here but couldnt find again.

i am kinda dumb when it comes to mechanical work but i can do a little.

I want to know the proper way to adjust my idol, pictures are a great help.
my idol is a little under 500 right now, i want to adjust it up to 700-900, as when i am at idol right now my battery power is a little below 12 volts, when i drive its up there normal. and i want to adjust the idol a little higher.

Its an 82 rx7, bought about 7 months ago. i have changed all the spark plugs, spark plug wires, dist cap, fuel filter, and had to change the fuel pump as the car died on me on the road and that was the problem, ran at about 3000 idol there for the day after i did that but it jumped back down to 1200, so i had a shop change my mixture so that it was back to normal, figured the old fuel pump was dieing so the guy before me altered with the carb to keep it going (quick fix or soemthing like that).

thanks in advance

trochoid

iTrader: (6)

Welcome to the forum. In the following link you will find the online FSMs, carb manual, etc.. Download whatever you need.

http://www.wankel.net/~krwright/cars/rx7/manuals.html

Kentetsu

https://www.rx7club.com/showthread.p...hreadid=310927

Written by Sterling, and very specific.....

Brayden89

Alright that awnsered that thank you.

Another question, my car at idol gets the volts so low that my deck dies and stuff, and at normal driving everything is workin good, but even at normal driving rpm my volts are only around 12.5-13. and just last night now my i needed to get a boost cause my care wouldnt start.

so would i have to change my alt or my battery? or both?
Umm i recently just put a 2 12" infinity subs and a mtx6001 amp with a 1.2 farad cap. so i figured that why it was dieing on me there. the amp is rated for 600 wats rms.

umm with that on note should i get a higher output alt then? and how much output on the alt should i look into getting? if that is it. but when i running the car the alt powers it up, so that might not be it? i dunno just throwing what ive been thinkn.

The car is a 1982 RX7 GX.

and if it is alt if i just put a sotck replacement type one on would that do, i was reading on napa for alts and the one for the car was like 55amp or soemthinglike that.

djessence

clean the corrosion off of all of your connections. That will help alot. Also look into the second gen alt upgrade.

The stereo is a decent drain on an already pathetic electrical system.

Brayden89

ok with that second gen alt upgrade,
would i just buy any alt off a second gen or do i need a specific year for it to go on.

and would it jsut connect like the one already on, not have to change anything, or how it go? thanks in advance

djessence

its in the archives, some easy re-wiring is required. I believe it is any S4 alt, but ill try and dig up that thread.

bliffle

I've never had a need to change to a larger alternator and I've avoided it because it unleashes a bunch of NEW problems. Why bother? Unless you're in Alaska and your battery cycles are severe from hard starting.

gsl-se addict

iTrader: (3)

Well, he has a large amplifier, so I would say that he needs a larger capacity alt. If you properly install the alt, there will be no problems created. The alt only puts out what it needs to in order to meet demand.

Simply put, the RX-7 alt upgrades are as follows:
- S4 (86-88) NA alts, plug right in, small upgrade
- S4 TII alts 70A, plugs right in, better upgrade (this is what you should use if you don't want to wire anything).
- S5 (89-91), NA or TII, 80A, bolts in, small wiring change (this is what I use)
- S6 (FD, 93+), 100A+, same wiring change as S5, pulley needs to be changed too

Now I have seen people mis-wire the S5, and FD alts and cause all sorts of problems (battery drain when car is off is the most common). If you do everything correctly, though..there will be no problems. I don't have any high load items in my GSL-SE (basically stock), but with the S5 alt, everything works better..especially when the system is fairly loaded (wipers, blower motor, headlights, etc.). For the S4 alts (recommend the TII), you simply plug it in..no different than installing the stock alt.

bliffle

Why is a 1 Farad capacitor required in a sound system? that will suck up a lot of charge from your battery.

gsl-se addict

iTrader: (3)

The cap is to provide extra current capacity from the power supply when the bass hits (large current draw). Basically just makes the amp perform better, but isn't totally needed.

Although generally you will not be working the amp at its fullest capacity, you have to remember 600W RMS / 13.8v supply = 44A. In addition, there is loss in the amp due to heat on top of this. The stock alt only can put out 55A, so you can see where there might be a problem.

When you add high load items (efan, amp), the alt should be upgraded to handle the additional load. It is also a good idea to upgrade output wire from the alt to better handle the extra current as well as to use a heavy gauge quality wire to your high load items. Better/additional grounds are a good idea too. Just like any other mod, you can do a hack job (have problems) or do it with quality (no problems). As long as it is thought out with good materials and good knowledge to do it right, there should be no issues.

Now when you are pulling the extra current, it isn't free. As the alt increases its output, the load on the engine increases. However, even a 100A alt running at full capacity will only take about 2HP to run (not a big deal at WOT, but somewhat significant at highway cruise (the 7 takes 12.5 HP to go 55mph, IIRC)).

bliffle

All that current goes into low frequency bass, good only for irritating other citizens, which it does mightily.

Brayden89

Alright, i think im just going to go with the s4 TII, so i dont have to mess around with wires.
I read on the archives how to do the s5 and was reading bout the s4.

i got the capacitor with my wire kit so i figured id use it, didnt sound like a bad idea, it is 4 ohm wires or w/e.

sorry one last question, you think the 70a that the s4 TII alternator puts out will be good enough for my setup? i am also gonna put a new battery in next paycheck just so teh electrical is all new.

And ive looked around junkyards here and my buddy checked in lethbridge last time he was that way and they aint got no rx7's i can take parts out of, so if i just went to like city auto parts, or napa, or zelmores. or anywhere like that would i just ask for a an rx7 s4 TII alternator. and wahts the TII stand for? just curious.

thanks alot again

trochoid

iTrader: (6)

I concur with Addict. The simplest upgrade is a plug and play S4 alt. No changes needed and it ups the output by 15 amps. If you need more than that then you will need to make some wiring changes, all of which is documented in the archives. I've seen guys up thier alts to 105 amps, but then thier systems were worth more than thier cars.

gsl-se addict

iTrader: (3)

TII is the name for the 2nd generation turbo RX-7. If you buy the alt new, just ask for an alt for an '87 (or '88) RX-7, turbo. Another good bet, which might be less expensive and just as good, is to grab a used TII alt off the forum (probably $35) and then take it to a good alt shop and have them go through it and replace bearings or whatever it may need.

As for it being enough, that depends on your system and how you use it. I would say it will be enough unless you enjoy cranking it up and seeing if you can shake all of the cars around you.

A new battery is a good idea, especially if you believe the battery to be old/failing.

How are your battery cables? I would replace them if you think they are original. I replaced mine a few years ago and so happy I did. It cranks much faster now. The old cables would actually get very hot and start smoking if you had to crank a bunch (flooded or whatever).

Brayden89

Thanks gsl-se addict for all the info, i believe the extra 15 amp upgrade to the s4 TII will be enough for my purposes, but ill probally put more stuff in thatll drain off my battery, so i should goto a S5. I also looked at my wires and they look good, they dont look like there expecially old, but the battery post clamp things(cant think of word) look old and a little rusty, so ima replace those too, for a better connection.
But the more i think of it i should just go with the S5 alt, and do the wire changes. it doesnt look that hard all it looks like is you dont run the ign. switch and run the terminal too a 12v source so the battery, so its really only 1 wire you gotta rerun with a better wire? . is that pretty much it there or i out too lunch? well that and soldering the wires there tot eh right posts.

i also printed off all the info on upgrading to the s4 / s5 alts and pictures so ive been lookin over, researched as much as i could to make a educated decision and do it up.

And i just wanted to check to make sure these would work with my car. 1982 RX7 GX. gx is waht it says on teh side of the car and what the guy i bought it off of told me, and i was reading in the archive that this upgrade is for a GSL-SE. so i was starting to question it.

Brayden89

Alright so scratch almost all i had said there i was rereading and i dunno what i was confused about before its simply making sense, ima go with teh S5 alt, as i might as well go bigger then have to redu it later. makes sense too me.

but still curious if that will work for my car, im sure it will but that GSL-SE confused me when my car is a 82 GX. sorry i noob dumb

orion84gsl

iTrader: (5)

I'm currently running an S4 alternator. My stereo consists of an Alpine head unit, with a Rockford Fosgate 400watt/4channel amp, 2 Rockford 100watt RMS components, and 2 50watt 3-way (yeah I said 3 way) in the rear. Completely cranked it doesn't effect the voltage output, at least on the dash gauge. A sub would probably do a little more but that depends on the output.