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hi guys i want to know if the automatic fd's come with some biggers injectors because im running complete exhaust ,intake and my car doesn't run lean and all people says to me that if i ran complete exhaust my car is gonna blow the engine and my cars feel strong.
thanks !!

maxpesce

No the engines are almost identical,

did you check A/F with a Wide Band O2 sensor? - An A/F guage running off the stock O2 sensor will show rich below 14:1 A/F ratio BUT an FD wants to run at 12.5:1 or richer on Boost. so 13.9:1>12.5:1 while rich for NA cars is too lean for a BOOSTED engine.

if you are still running stock (10psi) boost and the stock air filter, intake and IC you may not be flowing enough to run lean - but wil prob go way lean as soon as you open up the intake.

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hey man i run with re-amemiya intake and complete exhaust.

CowsniperRX7

iTrader: (3)

You are probably running lean and should consider a aftermarket ECU.

weaklink

haven't you heard the saying "leaner is meaner?" Your car will probably feel stronger til...BOOM. Actually, most recommend the 3 mod rule, so you should be ok, until that first really hot day, or bad tank of gas, or ...?

Street King

Stay at 10 psi and you will be fine.

Cihuuy

the injectors are identical like the manuals...
hows your boost pattern? running more han 10psi and you might blow your engine... be safe than sori...

Street King

I don't think Mazda would be that dumb to make the REW that unreliable past what it is now to where if you boost 1 psi above what is stock, that the whole car will blow up. You can run up to 12 to 13 psi but you better watch it after that.

Cihuuy

lets see... he said full exaust: that's and aftermarket dp, mp, and cat back. In addition an open intake! thats more than the 3 mod rule... im no expert but running more than 10-11 psi, he will have to, sooner or later need to upgrade the ecu or fuel... he may not know that he is lean until he gets a wideband o2... so y not keep it on stock boost until he is sure!?!

weaklink

i took complete exhaust to mean that it was all there, as in stock, as opposed to open. my mistake.

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my boost pattern is like 9-8-9.3
i want a ecu upgrade but remember that is an auto and is very hard to get one no???
i want to raise the boost to 12psi and i thik is gonna be safe!!

weaklink

its your car. go for it. I think you'll be ok. Anyway you can get a PFS PMC (tec2, or tec3 piggyback), PFC (it'll work-i run one), greddy emanage, piggybacked Haltech, and I think Pettit can remap your stock ecu. There's no excuse. Now swap in some bigger injectors and blow up your tranny!

Viper jr

You should edit your signature to read "on the way fresh rebuild..."

I guarantee you will pop it if you up the boost and then get on it. I had intake, downpipe, and a catback @ 11psi - chipped the corner off of a seal less thn a month after putting the intake on.

Cihuuy

you have to seek some people who have ecu upgrade to their auto rx7... try the AT club, they will have the answer for you for which ecu to buy... i read the Haltech is not for beginners! Power FC is easy friendly but auto loses the Hold button unless you modifie it... try searching on the PowerFC on auto... tons of info!!

I agree what weackling have mention... the auto tranny is not that strong, so it will degrade if you run higher boost... search on this also!!

Good luck

weaklink

HEY! It's WEAKLINK not WEAKLING! Note to self...get NEW nickname. Incidently I joined the forum around the time my tranny blew-hence the nickname. I think the auto tranny is the weak link of an otherwise great car. I guess since my new one has held, then maybe I can pick a new one.

Street King

How about mileage, was there problems before the mods, how is it driven?

Dragon

with the automatic tranny your not reving to 8k threw every gear so it's not going to be running up to as high of an injector %, there for your not even using peak power.. I love to get engines out of automatic cars, they are usually in damn good condition because they see very little stress = cheap overhaul..