timfaris

im just wondering if anyone can help me make up my mind on the hks twin power or the msd 6 for adding more fire to my fd, and how they hook up. i know that hks has a plug and play but i like to know and they have no install manuals online. niether does msd or anyone i can find. please help if possible.

arghx

iTrader: (3)

Wait so do you have a "1987 turbo" or an FD?

timfaris

Its a 1987 mazda rx7 13b turbo with 750cc injectors and a/r t4 turbo 1.00 quick spool .60 intake and bosh 255 fuel pump,fuel racingbeat fuel cutt deffender and what ever else i think i forgot. I had a fc commander on it and it blew when my intake did. Now i cant afford another and am trying to just get my a/f right again without putting the stock injectors in. Thanks for any help.

K-Tune

iTrader: (26)

You aren't wording your questions very well at all. I get that you want to upgrade your ignition but nothing else is clear. Are you thinking an MSD box is going to affect how your car runs? If you're under 400whp it isn't going to do a lot of anything. Are you trying to run bigger injectors on a stock computer?

RotaryRocket88

iTrader: (7)

How did your intake blow up? I thought that only happened in the Fast and the Furious.

If you want to run 720cc injectors with a stock ECU, you're going to need to get something to tune fuel. If you had a PFC before, you also had a way to tune timing, which is a very good idea if you're using an aftermarket turbo.

timfaris

i didnt have a big enough wastegate i guess, there was a backfire sound smoke and coolent everywhere. I have had this car you see in the profile pic, since 2004 me and her have been through alot of good and bad times, It is my third rx7 1981,86 and she a 87. first turbo. and back before the blow up the first add on to the electrical was a upgraded chip in the ecu. i think it was a fire chip. mazdatricks , racing beat or someone put it in. i had a apexi fc something with a hand held ajustment that was used and never ran right. But the point is the chip in my ecu is putting out more fuel than im putting out spark. IM RUNNING WAY RICH AND I THINK LIKE OLD SCHOOL FIRE BURNS GAS SO IM ASKING WHATS THE BEST FIRE. I WOULD LIKE TO GO WITH A MSD ADJUSTABLE BUT THEY DONT SEEM TO HAVE ONE FOR OUR CARS, SO HOW WOULD YOU HOOK THAT UP. I STILL HAVE A DATA LOG AND IT IS SAYING 2.75 TO UPTO 3.89 AND I SMELL LIKE HIGH OCTANE AND HAVE NO LOWER END.

timfaris

Yes a stock ecu with a firechip and i do believe they are 750cc not 720cc injectors. Pythons. She runs great after the turbo kicks in but is still running rich the whole time. And sorry about the wording im in a daze about this all. And just want a affordable solution. Like under a grand. $800 would be great. $500 would be a dream. Time are hard but i miss her power. What can i do in my buget is what im asking. Help if ya can thanks.

K-Tune

iTrader: (26)

Yeah... I'm gonna stay away from this one. Unknown "chip", unknown injectors, aftermarket turbo and inexperienced owner...all adds up to a time bomb. Don't drive the car hard anymore and RESEARCH what your car already has THEN determine what it needs.

beefhole

iTrader: (29)

You could do this for a little extra leading spark
http://fc3spro.com/TECH/HOWTO/CDI/cdi.html

However, you need to have this car properly tuned whether you upgrade the ignition or not. And you really don't need to upgrade the ignition.

timfaris

Ok if i just ripp it out and start all over again on this project i guess thats what im going to do. by the way the car has been ruunning hard and still has good compression it just runs rich. And i am a 12 year off shore chief engineer at work right now just trying to remember bro. and just was trying to get a little input on what i should do to stop the lag in my low end. i have rebuilt 2 of these engines and they where both 12a the fc 13b is the same i think its 80mm larger with bigger ports and if your so smart on it you know the rest. sorry we couldnt understand eachother i may do better when im not tending to four big *** desiel eng and im at home looking at her. like i said thanks for the attempt to help.

timfaris

Thnks man thats what i was looking for just little ideas to help me along in hard times. and something a little harder to do than plug an play. i will check that link out. thanks again.

misterstyx69

iTrader: (142)

I had the MSD 6AL on my leading coils..good spark,no problems.
If you go any "bigger" you could always use 3 boxes(one for leading and One each for trailing).
Guys have hooked up separate coils(4) and ran 4 boxes.
The HKS is a little more Compact and does a good job too.The way that it wires in gives the unit 100% Guarantee that your Spark will not fail.IF the Unit Ever dies it reverts back to your Stock ignition setup..(see the spec on thew unit and it will give ya more info).
.The Stock FC coils are good for a Nice amount of HP( like 400) anything after that,you are into getting a Heftier setup.
anyways,I hope my ramblin helped ya!

timfaris

Thanks beefhole. This was exactly what i was looking for just unable to explain it with all the caous around me right now. Thanks a million man. I will be able to get the air fuel right with this and a little timing. And yes i will take it to a dyno i have one near to use. Thanks again.

timfaris

it DID ALOT THANKS MYSTERY. THIUS WHAT I WAS ASKING. AND THE BETTER OF THE TWO. I WAS THINKING THE HKS FOR ALOT OF REASONS. BUT THE MSD IS AJUSTABLE, MEANING IF I GROW I CAN USE IT AND IF I RUN TO LEAN I CAN LOWER THE POWER GAINS RIGHT. THIS IS MY RAMBLING TO MY SELF SO DONT MIND ME , THANKS AGAIN.

timfaris

Now. which is better to go with?????? The msd 6a or the hks twin power. And i will be on a shopping spree.

K-Tune

iTrader: (26)

Neither one will fix your issue of running too rich.

timfaris

Ok if you think that the car will still produce more fuel after more spark and ajusting a pressure regulator maybe , i know the only thing to do is spead 1,700 to 3,500 on a megasquirt or haltech inwhich i have not seen any for my 87 turb o just 89 and up. i call a megasquirt dealer last year and they said i could build one which is alot of work starting at the bread board and installing every little cap and resistor. or swapping my whole wire harness and to a 89 including the tachs in the dash. inwhich i have done on my friend alex's 1986 n/a with oct,89 turbo engine. ITS JUST ALL A LEARNING PROCESS BRO AND WE ALL FAIL TO KNOW EVERYTHING . I THINK THATS WHY WE ALL ARE HERE AT THIS SITE FROM TIME TO TIME. I MIGHT JUST SAVE MY MONEY.

rx-7 obsessed

k tune is correct if you want to fix that u will need

1 a air fuel controller like an apexi afc because it sounds like you dont wanna pay the money for a standalone.

the only problem with the afc is that its only a patch job to a much larger problem.

as for the ignition i run the HKS in my car it was 418$ shipped to my door the msd is about half of that.

timfaris

Okwould someone please give me the place where i can get a good stand alone new for my 1987 turbo please and thank you.

rx-7 obsessed

www.racingbeat.com

www.mazdatrix.com

depends what brand u want...u can always just get a real tuner chip like the rtek

http://www.pocketlogger.com/index.php?pid=rtek7

timfaris

Rtek thanks i will look into that tomoorow. I just took on 18,500 gallons of fuel oil and i am beat from the waves and weather. Thanks for all everybody has helped me with.

timfaris

Just to let everyone know for the furture smart guy comment or just the hey dude check your o2 sensor. Because it was the o2 sensor that was causing the running rich. Duh duh duh. Sometimes we all can have dumb *** attacks. Just hope your not next . But im going with a rtek 2.1 and dropping down the injection to some rc 720cc injectors back to a factory fuel rails and searching for a good low cost wideband. Auto meter looks good. But is there a better one for the cost.

RotaryRocket88

iTrader: (7)

Hate to tell you, but as was already explained by a number of people, your oversized injectors are what would make it excessively rich at all times. A stock ECU expects only 550cc injectors, so it will run your 750cc injectors at the same duty cycles.

The 02 sensor is barely used on these cars. Closed loop only happens during cruising. At all other times (idle, acceleration, deceleration) the 02 sensor is not used.

timfaris

Yea thanks man and i am getting rid of them and this firechipped ecu. I was tricke d into this firechip at autoprts warehouse years ago and had no choice but to go back to it but it was supposed to be set up for the injectors and turbo. She is now running way less rich swaying into the green line and flashing into blue meaning rich on my a/r gauge that is leaving aswell. Live and learn like i said no ones perfect but we all r hard headed from time to time. My new setup will be my old beckarnly 550cc over or under some 720cc's need help on that where to put the lower cc injector i think on top cant remeber. Anyway. Im addining a rtek 2.1 with the knockbox and a wideband inovative 02 kit. I want to top it out with all 720cc's cause i want the most but the funds are low. And since rtek only sends upto a 720cc fuel rate im going to switch. Does this all sound worth while to anyone. Comments and opions are what we do here so shioot them at me. Thanks everyone.

beefhole

iTrader: (29)

try another gauge besides the innovative. I have one. NOT HAPPY. Many others feel the same. Most brands are around the same price so it won't be hard to find another option.