Howi

iTrader: (2)

hey guys!

alright, i'm building a track fc (TII on a 88 NA chasis), so emissions or even idling isn't a concern.
w/ that in mind, i'd like to remove my air-control valve (mounted on the lower intake manifold), EGR (also mounted on the lower intake manifold, facing towards the rear of the car), cold start assist valve (also mounted on the lower intake monifold), air-pump, and AFM. now, my questions, in sequence, are as follows:

1) w/ the air-control valve removed, how bad will my car idle, or will it idle at all?

2) i don't have a cat, so can i block off the EGR valve w/out suffering from consequences?

3) can i simply block off the cold-start assist w/out suffering from consequences?

4) as i said, i don't have a cat. so can i remove my air pump w/ out suffering from consequences?

5) i have a stock ECU. can i remove the AFM?

thanks a lot guys. these are not some of the easiest questions to answer. i appreciate your time and efforts

howi

vanix

I have removed everything you have asked about, but the afm and my idle is fine i also have no cat. You can't remove the afm if you have a stock computer the only thing you can do is get a s5 afm and wire it to work with your harness. The s5 afm flows better. I removed my cold start assist and my bac valve.

jreynish

iTrader: (2)

1) should not be affected all that badly (especially if you go stand alone See number 5)
2) you can remove it and block it of without consequence
3) yes for a better way of doing it see (throttle body mod)
4)yes along with the rest of the emisions equipment
5) no not with stock ecu. You would have to go stand alone to get rid of the AFM but if you are building an all out race car that is turbo then I personally think that you would be better off to go stand alone. I will allow you more tunability more power and oval less problems, which is what you want in a race car!

Rated R

I'm just reaffirming what everyone everyone else has said.
I've removed all the gear you mentioned and installed a Microtech MTX8 that has a map sensor. (Map sensors work of your manifold pressure so you don't need an AFM) and it is running without a problem.
This setup has been done on my daily driver and there's no problem. I've got it set to idle at 1200rpm because it won't idle below about 900rpm but i'm pretty sure that's because it has an extended port and the manifold has been ported/flowed.

Howi

iTrader: (2)

holy jesus you guys are good and reply fast!!!
thanks lots vanix & jreynish!! i REALLY appreciate that!!

taking your advises, i think i'll rip all of the mentioned parts off my fc, except for the afm... for now

howi

Howi

iTrader: (2)

and thanks to rated r too!!
you replied @ the same time i posted the previous reponse

thanks lots again guys!!

howi

jreynish

iTrader: (2)

Rated R;
You should be able to get it to iddle at about 800rpm! unless the port is absolutely MASSIVE! Because mine is fairly large and I can get it to iddle at 750rpm. I think that you need a little more tunning to be done to your Microtech (it's a huge learning curve I Know)
And yes you can run the microtech without AFM that is the beauty of stand alone!!! !

Howi, no prob. But when it comes to stand alone (if infact you are looking at it) do your research and find one that your tunner can tune and or one that fits your needs.. don't rely on others to make the decision for you! TRUST ME! it's best you make your own decision!
Good Luck

oregano

iTrader: (1)

yeah man. you should probably get a stand-alone that your local performance shop owner is familiar with.

Howi

iTrader: (2)

hehehe... alright! 2 more questions for you hotshots!

1) can i remove my air supply valve w/out suffering from consequences? (the little cylinder thing mounted on the top intake manifold, facing the rear of the car)

2) can i remove my air by-pass solenoid valve w/out suffering from consequences? (another little cylinder thing mounted on the top intake manifold, but this one is directly on top of the manifold, facing the top of the car, or the hood)

sigh... i really don't know why mazda had to mount like 5 valves/solenoids all around the freakin manifolds, not to mention the omp lines, fuel lines... etc... geeze.....what a freakin mess....

anyways, can't wait till i bypass all this garbage... i want a fast, simple car.... it can idle like crap for all i care!!

thanks again guys!!

howi

jreynish

iTrader: (2)

Yes all the things you ask you can do... Here is a really helpful thread!

https://www.rx7club.com/forum/showth...ighlight=block

take a look at it has lots of help and pretty much coveres what you are asking.. as for hindering things yes it can hinder the operation of your car but as it is going to be a race car you won't need things like iddle adjust when you start the AC or things such as that! But I still maintain you best gain for you dollar is and will most likely be the Stand Alone EFI!

BDoty311

Ya mazda could have used a simpler system, but it would have costed them more money for R&D. So they stuck us with an over-complicated intake manifold with 30 million valves and solenoids.

NZConvertible

You should not critisise the stock emissions control systems. Without them Mazda would not have been allowed to even sell the car, and you'd be driving a Honda.

These systems is not complicated once you do a little research and figure out what it all does. Knowledge is a powerful thing.

jreynish

iTrader: (2)

agreed however this is a race system and thus does not need to be there thus hindering it's power potential. Do you now agree NZ?

NZConvertible

Obviously emission controls aren't required for a racecar. I was replying specifically to BDoty311's post.

Besides, I never said I want them on my car. In fact they're long gone. I just know that without them there would be no RX-7.

Bukwild

Howi,
you are asking people on this forum tips on building a race car. Most of us have all these things done to our cars and we still drive them on the street and love it. when I think race car I think full cage, ported motor, large turbo, fmic, 4:30 rear end gears, lexan rear window, coilover suspension. Things like this. Removing your emissions is a great performance gain but it is just a start for a street car.

Howi

iTrader: (2)

hehehe... mr. bukwild... i think you got the wrong idea my friend....

yes, a full cage, ported motor, large turbo.. etc etc will make a track car, but so will a bone stock protege. if i have $50k to dump on my project track car, i'd probably do all of the things you mentioned. but hey... reality sucks doesn't it?

my friends and i enjoy hitting the track every summer. as matter of fact bukwild, i've done everything you had mentioned on my previous track civic, minus the lexan windows and turbo-related items of course ($$$).

i'm building a track fc from scratch. and yes, i will be installing coilovers, stright pipe, and a cage some time next year (after this damn winter). but right now, i'm still in the process of building the car, the thing doesn't even run yet!!


and nz... i drive a honda.. and happen to like it a lot more than my 7

howi

RacerJason

iTrader: (5)

PM me if you'd like to see my racing FC or are interested in any cagework. I don't think you realize what you're getting yourself in to by building a dedicated track car lol All in good fun though

TargaRX

iTrader: (12)

I am building my FC for the next Targa Newfoundland Tarmac Raslly... lets me know how it turns out.. I need some help and ides on what I can do with the car... I am running an N/A though.

Howi

iTrader: (2)

thanks jason!! i'd love to see some pics of your baby!

you're saying this based on.......???
are you taunting me? huh? huh?

you're from toronto huh? i'll see you on the track next year

howi

rrewq

Well Jason, I think howi's cars gonna be more of a lapping car/track beater... so it'll be more like my car than your car... So he doesn't need everything to be as clean and meticulous as you...

RacerJason

iTrader: (5)

I'm basing that previous statement on my personal experience of building a racecar. It's a neverending, money sucking, mind bending experience. If it's just a lapping car then you don't have to go to town on it.

Clean and meticulous? You should see my RX7 Mad Scientist Laboratory set up in the basement now!!! Carbon fiber switch panels being assembled, calipers being overhauled and painted, deleting **** from the entire car wiring harness and making a duplicate for backup, too many little things... AAAARRRRRGGGGHHHHHH

Bukwild

ah another young kid dreaming of building a "race" car with pep boy "performance parts. You asked all of us for mod info on building a race car, then we gave it to you and you tell us your a experienced track racer already you should know all of this stuff and not waiste our time.

Howi

iTrader: (2)

wtf is your problem man??
here.. try to follow my logic here:
1) how did you assume that i'm just "another young kid"?
2) how did you assume that i do up my car in pepboy? (if you had learned to observe and think before you speak, you'd realize that i'm from canada, and we don't get pepboys here)
3) i've built a few track honda's before, but never an fc. so, how the heck do you figure that i should know anything about removing fc valves/solenoids? what? becuase i've been on the track i should know about air supply valves, air control valves, EGR's.. etc? i'm sorry but i just don't follow your freakin logic....
4) you said, "You asked all of us for mod info on building a race car, then we gave it to you and you tell us ... etc etc". i'm sorry did you use the pronouns "us" and "we"? i'm sorry but YOU never helped answer any one of my questions anyways!! now YOU are telling me not to waste YOUR time?? wtf man??!! why are you even on this thread?? you've done absolute **** so speak for your freaking self man.... don't get others involved. everyone else has been very helpful and are not stingy about their wealth in knowledge. don't categorize yourself as one of them.

and jason... carlo's right! i build track cars, not all out race-only cars with sponsors, pit-crews.. etc.....
it's just for fun!!
and yes i know EXACTLY what i'm getting myself into.
actually my car looks almost identical to carlo's.. minus the paintjob (carlo, i think mine is WAAAAY nicer!!
hehehehehe.....

IAN

iTrader: (3)

howi,

Another local. So I will probable see you around shannonville/mosport?


Ian

IAN

iTrader: (3)

If I recall correctly this is the open road course flying throught all the towns?? I thought that would be sick. Basically a bunch of enthusists right.

That would be sick. Better capture some video.

Better yet do you need a shitty co-driver

Ian
I never said I could write!