ECU tunning?

[idahotuner]

I partially understand the whole ECU tunning, but i was wondering the difference between a stand alone, piggy back, or just haveing your stock ecu tuned? What does it means when it says "core ECU requried"? i have all of my upgrades planned out but this is the area that is open. and i need to decided what to do with it. i just need more explination? or ideas on what i should do? or go with!my goal is about 375 RWHP.

i have an SR20DET REDTOPyes i am doing brakes , LSD, and suspension repairs annd upgrades i going to get a gt2871r .64 turbo, greddy intake manifold. some electric boost controler, either HKS or BLITZ, z32 MAF, 555 injectors, yes i am doing brakes , LSD,drivetrain, and suspension repairs and upgrades i have all of the basic upgrades all ready FMIC, FULL EXHAUST. walbro 255 fuel pump ect ......

[doridori23]

A standone replaces your ECM. They usually offer the most finite and hence best tunes but if your state has OBDII Emissions check (scan the ECM) then you will fail the emissions and ahve to find a shady shop. Recomend AEM only

A piggy back is a computer that takes over some ofthe functions from teh stock ECM. This allows better fuel and ignition management while leaveing the stock in place for emissions and reliability. Recomend GReddy Emanage Ultimate or APEXi Power Fuel Commander

Stock ECM Tuning is the lowest ont eh ladder. They simply reprogram your ECU. With the price of getting an ECU reflashed and ease of use some people still do this but if you plan on modding your car more than once it is not a logical choice. I can not recomend a source as I have never had a reflash

"Core ECU/ECM Required" simply means that you must send your ECM in to them and they will send you one back.

For a goal of 375 at the wheels you will need to go with a GT2871 with .86 ar or even better a GT 2878 with .86 ar. You can get a 2871 .64 up that high but you will be boosting very high and reliability is an issue. (Reliable being 30k+ miles on the turbo) Also I would go with a GReddy Emanage Ultimate and swap from L-Jetro to D-Jetro fuel system this would allow you to eliminate the MAF completely and will cost less than going with a APEXi Power FC.

[idahotuner]

Does a GT 2878 with .86 ar (the same turbo as GT3071R)? bolt on the stock manifold. i would liek to do a top mount tubro, but i am just looking at reliablity andwhat other people are using. with the GReddy Emanage Ultimate you can do all of your own tunning by plugging it into your stock ecu? does it eliminate the governor? What does swapping from a L-Jetro to D-Jetro fuel system include. i live in Idaho, so we have no emissions or any of that. car testing which is nice.
Modified by idahotuner at 2:20 PM 7/30/2007

[idahotuner]

so i was reading that rom tunes arnt very specificy tuned. is ther somthing cheeper the na power fc or and of those tunes that a person can do. becasue when i get my build done it will be done and not be adding anymore upgrades so i was wonderng about an ecu. i was going to go with the power fc or greddy ulimate manegment but i dont know. once i get it tuned on a dyno it will be done. so any idea would help. i am planing on spending close to 10g's by the time the car is finished next spring. alot of that money is suspension and drive train repairs and upgrades.

[idahotuner]

anybody have an answer for me. i am tring to save a little bit of money any way possible

[elgarvo616]

anybody have an answer for me. i am tring to save a little bit of money any way possible

theres a saying;cheap, fast, and reliable. you get to pick 2 of the 3.

with that said, i would personally go with a re-flash. its nice and reliable. someone on here made 400rwhp with a tune from Jim Wolf. piggy backs (S-afc, e-manage, etc) are only good to a limit. i know with the afc you can only go twice the size with the injectors (thus limiting power). i know people use the piggy-back to fine tune the ROM tune they get. the standalone is best from a perforance standpoint. just make sure you get someone who knows what theyre doing when you get it tuned.

[idahotuner]

thanks. i was thinking about a reflash tune but i wasnt sure what to go with.but now i think that is what i will do, because i can install all of my parts my self. and have my ecu tuned and then when sumer comes i can drive it. sweet. thanks alot

[deviousKA]

I can do custom ECU tuning for sr20, I am located in Juliaetta (about 20 miles out of Lewiston, Idaho).

This is not an ad, ive never been to St. Maries but I dont think its too far away from where im at, local offer only.

[idahotuner]

thank you, you should send me your email addy so then i can hit you up with some questionsand i might just have you do it.

[bluemax]

I thought I'll throw in a few other options.

http://www.maftpro.com/ This product seems to be very popular with the domestic and dsm crowd

another option woul be calum...just google "calumsult"

enjoy

[spoolinonyou]

i bought the greddy eman ult. off of a friend and i was wondering if it could support 600+hp? i have a fully built sr redtop, 272 cams, 850cc, gt35r, ect.

[davisk6]

I can only go by my personal experience, but I believe standalone is the only way to go. The cheapest option is the ECU reflash. If you aren't looking for big numbers and want something you can easily live with every day, the reflash is it.

I agree with doridori23 in your situation. I don't think a ROM tune will get the output you are looking for. I personally prefer the Apex'i Power FC over the Emanage, but the Emanage will be fine. The difference between L-Jetro and D-Jetro is how the air input into the engine is metered.

L-Jetro is MAF based. So sticking with your Z32 MAF, you will need a L-Jetro style of engine management

D-Jetro is MAP based, or Manifold Atmospheric Pressure also known as Speed Density (I believe that's what is stands for, correct me if I'm wrong). The ECU reads manifold pressure instead of mass air flow to determine the air volume. The benefit over L-Jetro is you can run much higher boost and get more accurate readings as the MAF voltage is taken out of the equation.

Hope that helps.

[nismonet]

damn good thread.. alot of info here that has helped me out

[BEST1TUNING.COM]

The stock ecu is well capable of higher hp numbers! I have pushed over 500 hp on a tuned factory SR ecu, if you are looking for over 600 than I would suggest a standalone simply for the d-jetro support.

[fast_s13]

if you plan on lots of upgrades in the future i would go ahead and get a standalone

[BEST1TUNING.COM]

Since we where on the subject of how difficult it is to upgrade the tune, sending chips out recieviing them putting them back in downtime etc, I wanted to let you guys know that there are rom tuning boards available that are programmed via USB so baisically no sending chips back and forth for retune simply trade tunes with your rom tuner of choice via e-mail. I thought this might make things easier so I made some up. They also can store up to 2 tunes or if you use the switch on the board with your clutch switch you can create a lauch control antilag for drag. Fun stuff.

[Ari G]

Emulating on the fly is sweet compared to chip burning