cookssc300

ok guys got my 92 sc300 running great ac delete ingen cold air intake muffler and resonator delete straight piped. ok so now maint question i wanna turbo like lot of other people but here is my question. im looking for about 350-400 maybe lil more if it happens fine if not perfer not to use piggyback. stock ecu? or upgrade to what is it beeter for a whole kit or piece together . buddy of mine has a cummins turbo that he said would be perfect on it (hes got a fd rx) but is it to big or do i need smaller if so how big anyways do u still use stock maf what size injectors or can i leave stock. any advice woiuld be greatly appericated.

TXMAG

iTrader: (1)

I'm not going to be one of those guys who just blindly tells you to search, so....


Start with this:
NA-T TT ECU Mod - https://www.clublexus.com/forums/sc-...t-ecu-mod.html


Then look at this:
Build Thread - https://www.clublexus.com/forums/build-threads-252/


Just about everything you are asking will be answered and you'll get a much better understanding of what you want to do by reading about it a little more in-depth.

cookssc300

so u have to switch to a tt ecu cannot use factory? and injectors understandable but why iat and diff coil and why cant use stock ecu so can keep tcc lock-up

Mekoz

iTrader: (1)

you dont need a tt ecu mod its an option.. if you are looking for less than 500hp afc/vpc(or any other piggy back) is fine for your goal.
On stock injectors youll be limited to maybe 300hp. Ur better off upgrading to 550cc (rx7 stock injectors) also might want to add a aftermarket fuel pump.
Youre better off piecing a kit together (cheaper and you get what you want)

Dobbin

+1

listen to this man

Kris9884

iTrader: (7)

I HIGHLY recommend the TT ECU MOD if you plan on boost at all, the stock ECU will make your life a living hell!! Read the thread about it, its straight forward and with OEM drive ability. It also answers the questions about the IAT, injectors etc etc.. Its practically a recipe for 400+ HP.. I can't comment on ^^^ these guys experience but trust me, you'll end up going this route after you learn the hard way..

cookssc300

ok i bought a turbo today from fleamarket its a caterpillar ax50 pretty good deal barely any shaft play and internal wastergate think that would work? but ok guys so if i do tt ecu and iat and injectors what about tcc lockup any confirmed fixes other than trans swap i plan on doin a man swap either r154 or cd009 i have both just waiting see which way to go but until then will if mess my trans up if do not have tcc lockup

cookssc300

what u mean afc/vpc im not trying to go piggyback so only thing i can do it tt ecu mod? to get to power im looking for. but also how much power and capable boost can i make safely on stock ge headgasket

cookssc300

please help anyone just to make sure a piggy back and standalone are two seperate things or the same

TXMAG

iTrader: (1)

They are two separate things. In VERY simplistic terms, a piggy back will work in conjunction with the ECU while a standalone unit will replace the ECU.

cookssc300

how much does a piggyback usually run and how useful on stock ge ecu

TXMAG

iTrader: (1)

Depends on who you ask. Some will say that if you want to run any boost at all on a GE then you need to convert to a TT ECU. Doing this you don't even need a piggy back (just matching components like bigger injectors, etc), but in your case you will lose automatic lockup on your transmission. Others say that you can use the stock GE ECU with a piggy back just fine. Up to what power level, I have no idea. Just relaying some info I've heard on this from people who have done it successfully in the low 300HP range.


A good piggy back option would be something like an Apexi SAFC-II or the NEO. Expect to pay anywhere from $150 - $500 depending on new/used condition and where you buy it.


A good standalone unit will probably run you $1500 used to $2000+ new.

Kris9884

iTrader: (7)

Yes, you DO NOT want piggyback on the ge ECU, it constantly reads and adjusts air/fuel and its just a nightmare.

The stock GE headgasket is kind of a toss up. If you have high miles its just worth trading it out for another or get a GTE gasket to drop your compression a bit. The stock GE gasket has seen 500+hp and quite a bit of boost but I don't recall a definite answer on a where the ceiling is.

There are many examples of the lock up issue being fixed, just search it man. This thread is your best friend, within the first couple pages you'll have allllllll your answers, I did, and so did everyone else lol..

https://www.clublexus.com/forums/sc-...t-ecu-mod.html